Add a few tests to upgrade testsuite

... coverage not complete, but pretty diverse and covers most
non-trivial conversions. PRs with better coverage for 1.23.o options
welcome.

Signed-off-by: Alexey Neyman <stilor@att.net>

10 files changed, 4037 insertions, 10 deletions

diff --git a/scripts/version-check.sh b/scripts/version-check.sh
index cd0c7f7..ccadfe7 100644
--- a/scripts/version-check.sh
+++ b/scripts/version-check.sh
@@ -112,7 +112,8 @@ select_linaro()
 
 
 ### Per-version upgrade drivers. Called with ${opt} and ${val} set,
-### may modify these variables
+### may modify these variables.
+### FIXME: perhaps, split these functions into per-version files in scripts/upgrade/{0,1,...}
 
 # Upgrade from version 0 (which is 1.23, as released) to version 1
 # (current state of master as of 2019/01/20). Upgrades in the interim
@@ -233,10 +234,12 @@ upgrade_v0()
         replace CT_NEWLIB_CUSTOM_LOCATION
         ;;
     CT_LIBC_UCLIBC_CUSTOM)
-        if [ "${CT_LIBC_UCLIBC_CUSTOM_UCLIBC}" = "y" ]; then
-            replace CT_UCLIBC_SRC_CUSTOM
-        else
-            replace CT_UCLIBC_NG_SRC_CUSTOM
+        if is_set; then
+            if [ "${CT_LIBC_UCLIBC_CUSTOM_UCLIBC}" = "y" ]; then
+                replace CT_UCLIBC_USE_UCLIBC_ORG
+            else
+                replace CT_UCLIBC_USE_UCLIBC_NG_ORG
+            fi
         fi
         ;;
     CT_LIBC_UCLIBC_CUSTOM_UCLIBC)
@@ -337,7 +340,7 @@ upgrade_v0()
     CT_GDB_V_7_8|CT_GDB_V_7_8_1)    replace CT_GDB_V_7_8_2;;
     CT_GDB_V_7_8_2)                 replacement_for CT_GDB_V_7_8 CT_GDB_V_7_8_1;;
     CT_GDB_V_7_9)                   replace CT_GDB_V_7_9_1;;
-    CT_GDB_V_7_10)                  replace CT_CT_GDB_V_7_10_1;;
+    CT_GDB_V_7_10)                  replace CT_GDB_V_7_10_1;;
     CT_GDB_V_linaro_7_3)            select_linaro GDB; replace CT_GDB_LINARO_V_7_3_2011_12;;
     CT_GDB_V_linaro_7_4)            select_linaro GDB; replace CT_GDB_LINARO_V_7_4_2012_06;;
     CT_GDB_V_linaro_7_5)            select_linaro GDB; replace CT_GDB_LINARO_V_7_5_2012_12;;
@@ -383,7 +386,7 @@ upgrade_v0()
     CT_LIBC_NEWLIB_LINARO_V_2_2_0)  select_linaro NEWLIB; replace CT_NEWLIB_LINARO_V_2_2_0_2015;;
     CT_LIBELF_V_0_8_12)             replace CT_LIBELF_V_0_8_13;;
     CT_LIBELF_V_0_8_13)             replacement_for CT_LIBELF_V_0_8_12;;
-    CT_M4_V_1_4_13|CT_M4_V_1_4_17)  replace CT_CT_M4_V_1_4_18;;
+    CT_M4_V_1_4_13|CT_M4_V_1_4_17)  replace CT_M4_V_1_4_18;;
     CT_M4_V_1_4_18)                 replacement_for CT_M4_V_1_4_13 CT_M4_V_1_4_17;;
     CT_MPC_V_0_8_1)                 replace CT_MPC_V_0_8_2;;
     CT_MPC_V_0_8_2)                 replacement_for CT_MPC_V_0_8_1;;
@@ -402,11 +405,15 @@ upgrade_v0()
                                     replace CT_STRACE_V_4_5_20;;
     CT_STRACE_V_4_5_20)             replacement_for CT_STRACE_V_4_5_18 CT_STRACE_V_4_5_19;;
     CT_LIBC_UCLIBC_NG_V_1_0_20|CT_LIBC_UCLIBC_NG_V_1_0_21|CT_LIBC_UCLIBC_NG_V_1_0_22)
-                                    is_set && echo "CT_UCLIBC_USE_UCLIBC_NG_ORG=y"
+                                    if is_set; then
+                                        echo "CT_UCLIBC_USE_UCLIBC_NG_ORG=y"
+                                    fi
                                     replace CT_UCLIBC_NG_V_1_0_25
                                     ;;
     CT_LIBC_UCLIBC_V_0_9_33_2)
-                                    is_set && echo "CT_UCLIBC_USE_UCLIBC_ORG=y"
+                                    if is_set; then
+                                        echo "CT_UCLIBC_USE_UCLIBC_ORG=y"
+                                    fi
                                     replace CT_UCLIBC_V_0_9_33_2
                                     ;;
     CT_WINAPI_V_2_0_7|CT_WINAPI_V_2_0_7|CT_WINAPI_V_2_0_9)
@@ -441,7 +448,6 @@ upgrade_v0()
         unset opt
         ;;
     esac
-
 }
 
 # Upgrade v1 -> v2: several packages had their config options renamed
diff --git a/testing/upgrade/run.sh b/testing/upgrade/run.sh
index 41d3bb0..337eeff 100755
--- a/testing/upgrade/run.sh
+++ b/testing/upgrade/run.sh
@@ -99,6 +99,9 @@ run_sample()
         echo "Variable ${o} not present" >&${LOG}
         fail
     done
+    mv .config "logs/${current_tc}.config"
+    mv .config.before-olddefconfig "logs/${current_tc}.config.before-olddefconfig"
+    rm -rf .config.before-upgrade
     exec {LOG}>&-
     finish
 }
diff --git a/testing/upgrade/samples/README b/testing/upgrade/samples/README
new file mode 100644
index 0000000..2a38fd0
--- /dev/null
+++ b/testing/upgrade/samples/README
@@ -0,0 +1,3 @@
+Add sample configurations to run through the upgrade here with a .config
+extension. Expected values are recorded in the file itself, starting with
+a double-hash.
diff --git a/testing/upgrade/samples/v0-0000.config b/testing/upgrade/samples/v0-0000.config
new file mode 100644
index 0000000..c2155bf
--- /dev/null
+++ b/testing/upgrade/samples/v0-0000.config
@@ -0,0 +1,738 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Crosstool-NG Configuration
+#
+CT_CONFIGURE_has_static_link=y
+CT_CONFIGURE_has_wget=y
+CT_CONFIGURE_has_stat_flavor_GNU=y
+CT_CONFIGURE_has_make_3_81_or_newer=y
+CT_CONFIGURE_has_libtool_2_4_or_newer=y
+CT_CONFIGURE_has_libtoolize_2_4_or_newer=y
+CT_CONFIGURE_has_autoconf_2_63_or_newer=y
+CT_CONFIGURE_has_autoreconf_2_63_or_newer=y
+CT_CONFIGURE_has_automake_1_15_or_newer=y
+CT_CONFIGURE_has_gnu_m4_1_4_12_or_newer=y
+CT_CONFIGURE_has_svn=y
+CT_CONFIGURE_has_git=y
+CT_MODULES=y
+
+#
+# Paths and misc options
+#
+
+#
+# crosstool-NG behavior
+#
+CT_OBSOLETE=y
+CT_EXPERIMENTAL=y
+# CT_ALLOW_BUILD_AS_ROOT is not set
+# CT_DEBUG_CT is not set
+
+#
+# Paths
+#
+CT_LOCAL_TARBALLS_DIR="${HOME}/src"
+CT_SAVE_TARBALLS=y
+CT_WORK_DIR="${CT_TOP_DIR}/.build"
+CT_BUILD_TOP_DIR="${CT_WORK_DIR}/${CT_HOST:+HOST-${CT_HOST}/}${CT_TARGET}"
+CT_PREFIX_DIR="${CT_PREFIX:-${HOME}/x-tools}/${CT_HOST:+HOST-${CT_HOST}/}${CT_TARGET}"
+CT_RM_RF_PREFIX_DIR=y
+CT_REMOVE_DOCS=y
+CT_PREFIX_DIR_RO=y
+CT_STRIP_HOST_TOOLCHAIN_EXECUTABLES=y
+# CT_STRIP_TARGET_TOOLCHAIN_EXECUTABLES is not set
+
+#
+# Downloading
+#
+CT_DOWNLOAD_AGENT_WGET=y
+# CT_DOWNLOAD_AGENT_NONE is not set
+# CT_FORBID_DOWNLOAD is not set
+# CT_FORCE_DOWNLOAD is not set
+CT_CONNECT_TIMEOUT=10
+CT_DOWNLOAD_WGET_OPTIONS="--passive-ftp --tries=3 -nc --progress=dot:binary"
+# CT_ONLY_DOWNLOAD is not set
+# CT_USE_MIRROR is not set
+
+#
+# Extracting
+#
+# CT_FORCE_EXTRACT is not set
+CT_OVERRIDE_CONFIG_GUESS_SUB=y
+# CT_ONLY_EXTRACT is not set
+CT_PATCH_BUNDLED=y
+# CT_PATCH_LOCAL is not set
+# CT_PATCH_BUNDLED_LOCAL is not set
+# CT_PATCH_LOCAL_BUNDLED is not set
+# CT_PATCH_BUNDLED_FALLBACK_LOCAL is not set
+# CT_PATCH_LOCAL_FALLBACK_BUNDLED is not set
+# CT_PATCH_NONE is not set
+CT_PATCH_ORDER="bundled"
+
+#
+# Build behavior
+#
+CT_PARALLEL_JOBS=0
+CT_LOAD=""
+CT_USE_PIPES=y
+CT_EXTRA_CFLAGS_FOR_BUILD=""
+CT_EXTRA_LDFLAGS_FOR_BUILD=""
+CT_EXTRA_CFLAGS_FOR_HOST=""
+CT_EXTRA_LDFLAGS_FOR_HOST=""
+# CT_CONFIG_SHELL_SH is not set
+# CT_CONFIG_SHELL_ASH is not set
+CT_CONFIG_SHELL_BASH=y
+# CT_CONFIG_SHELL_CUSTOM is not set
+CT_CONFIG_SHELL="${bash}"
+
+#
+# Logging
+#
+# CT_LOG_ERROR is not set
+# CT_LOG_WARN is not set
+# CT_LOG_INFO is not set
+CT_LOG_EXTRA=y
+# CT_LOG_ALL is not set
+# CT_LOG_DEBUG is not set
+CT_LOG_LEVEL_MAX="EXTRA"
+# CT_LOG_SEE_TOOLS_WARN is not set
+CT_LOG_PROGRESS_BAR=y
+CT_LOG_TO_FILE=y
+CT_LOG_FILE_COMPRESS=y
+
+#
+# Target options
+#
+CT_ARCH="alpha"
+CT_ARCH_alpha=y
+## CT_ARCH_ALPHA=y
+# CT_ARCH_arm is not set
+# CT_ARCH_avr is not set
+# CT_ARCH_m68k is not set
+# CT_ARCH_microblaze is not set
+# CT_ARCH_mips is not set
+# CT_ARCH_nios2 is not set
+# CT_ARCH_powerpc is not set
+# CT_ARCH_s390 is not set
+# CT_ARCH_sh is not set
+# CT_ARCH_sparc is not set
+# CT_ARCH_x86 is not set
+# CT_ARCH_xtensa is not set
+CT_ARCH_alpha_AVAILABLE=y
+CT_ARCH_arm_AVAILABLE=y
+CT_ARCH_avr_AVAILABLE=y
+CT_ARCH_m68k_AVAILABLE=y
+CT_ARCH_microblaze_AVAILABLE=y
+CT_ARCH_mips_AVAILABLE=y
+CT_ARCH_nios2_AVAILABLE=y
+CT_ARCH_powerpc_AVAILABLE=y
+CT_ARCH_s390_AVAILABLE=y
+CT_ARCH_sh_AVAILABLE=y
+CT_ARCH_sparc_AVAILABLE=y
+CT_ARCH_x86_AVAILABLE=y
+CT_ARCH_xtensa_AVAILABLE=y
+CT_ARCH_SUFFIX=""
+
+#
+# Generic target options
+#
+# CT_MULTILIB is not set
+CT_DEMULTILIB=y
+CT_ARCH_USE_MMU=y
+CT_ARCH_SUPPORTS_32=y
+CT_ARCH_DEFAULT_32=y
+CT_ARCH_BITNESS=32
+CT_ARCH_32=y
+
+#
+# Target optimisations
+#
+CT_ARCH_SUPPORTS_WITH_CPU=y
+CT_ARCH_SUPPORTS_WITH_TUNE=y
+CT_ARCH_CPU="ev56"
+CT_ARCH_TUNE=""
+CT_TARGET_CFLAGS=""
+CT_TARGET_LDFLAGS=""
+CT_ARCH_FLOAT=""
+
+#
+# alpha other options
+#
+# CT_ARCH_ALPHA_EV4 is not set
+# CT_ARCH_ALPHA_EV45 is not set
+# CT_ARCH_ALPHA_EV5 is not set
+CT_ARCH_ALPHA_EV56=y
+# CT_ARCH_ALPHA_EV6 is not set
+# CT_ARCH_ALPHA_EV67 is not set
+CT_ARCH_ALPHA_VARIANT="ev56"
+
+#
+# Toolchain options
+#
+
+#
+# General toolchain options
+#
+CT_USE_SYSROOT=y
+CT_SYSROOT_NAME="sysroot"
+CT_SYSROOT_DIR_PREFIX=""
+CT_WANTS_STATIC_LINK=y
+CT_WANTS_STATIC_LINK_CXX=y
+# CT_STATIC_TOOLCHAIN is not set
+CT_TOOLCHAIN_PKGVERSION=""
+CT_TOOLCHAIN_BUGURL=""
+
+#
+# Tuple completion and aliasing
+#
+CT_TARGET_VENDOR="unknown"
+CT_TARGET_ALIAS_SED_EXPR=""
+CT_TARGET_ALIAS=""
+
+#
+# Toolchain type
+#
+# CT_NATIVE is not set
+CT_CROSS=y
+# CT_CROSS_NATIVE is not set
+# CT_CANADIAN is not set
+CT_TOOLCHAIN_TYPE="cross"
+
+#
+# Build system
+#
+CT_BUILD=""
+CT_BUILD_PREFIX=""
+CT_BUILD_SUFFIX=""
+
+#
+# Misc options
+#
+# CT_TOOLCHAIN_ENABLE_NLS is not set
+
+#
+# Operating System
+#
+CT_KERNEL_SUPPORTS_SHARED_LIBS=y
+CT_KERNEL="linux"
+CT_KERNEL_VERSION=""
+# CT_KERNEL_bare_metal is not set
+CT_KERNEL_linux=y
+## CT_KERNEL_LINUX=y
+CT_KERNEL_bare_metal_AVAILABLE=y
+CT_KERNEL_linux_AVAILABLE=y
+CT_KERNEL_LINUX_CUSTOM=y
+CT_KERNEL_LINUX_CUSTOM_LOCATION="/foo/linux"
+## CT_LINUX_SRC_CUSTOM=y
+## CT_LINUX_CUSTOM_LOCATION="/foo/linux"
+CT_KERNEL_LINUX_CUSTOM_VERSION=""
+# CT_KERNEL_V_4_10 is not set
+# CT_KERNEL_V_4_9 is not set
+# CT_KERNEL_V_4_8 is not set
+# CT_KERNEL_V_4_7 is not set
+# CT_KERNEL_V_4_6 is not set
+# CT_KERNEL_V_4_5 is not set
+# CT_KERNEL_V_4_4 is not set
+# CT_KERNEL_V_4_3 is not set
+# CT_KERNEL_V_4_2 is not set
+# CT_KERNEL_V_4_1 is not set
+# CT_KERNEL_V_4_0 is not set
+# CT_KERNEL_V_3_19 is not set
+# CT_KERNEL_V_3_18 is not set
+# CT_KERNEL_V_3_17 is not set
+# CT_KERNEL_V_3_16 is not set
+# CT_KERNEL_V_3_15 is not set
+# CT_KERNEL_V_3_14 is not set
+# CT_KERNEL_V_3_13 is not set
+# CT_KERNEL_V_3_12 is not set
+# CT_KERNEL_V_3_11 is not set
+# CT_KERNEL_V_3_10 is not set
+# CT_KERNEL_V_3_9 is not set
+# CT_KERNEL_V_3_8 is not set
+# CT_KERNEL_V_3_7 is not set
+# CT_KERNEL_V_3_6 is not set
+# CT_KERNEL_V_3_5 is not set
+# CT_KERNEL_V_3_4 is not set
+# CT_KERNEL_V_3_3 is not set
+# CT_KERNEL_V_3_2 is not set
+# CT_KERNEL_V_3_1 is not set
+# CT_KERNEL_V_3_0 is not set
+# CT_KERNEL_V_2_6_39 is not set
+# CT_KERNEL_V_2_6_38 is not set
+# CT_KERNEL_V_2_6_37 is not set
+# CT_KERNEL_V_2_6_36 is not set
+# CT_KERNEL_V_2_6_35 is not set
+# CT_KERNEL_V_2_6_34 is not set
+# CT_KERNEL_V_2_6_33 is not set
+# CT_KERNEL_V_2_6_32 is not set
+CT_KERNEL_windows_AVAILABLE=y
+
+#
+# Common kernel options
+#
+CT_SHARED_LIBS=y
+
+#
+# linux other options
+#
+CT_KERNEL_LINUX_VERBOSITY_0=y
+# CT_KERNEL_LINUX_VERBOSITY_1 is not set
+# CT_KERNEL_LINUX_VERBOSITY_2 is not set
+CT_KERNEL_LINUX_VERBOSE_LEVEL=0
+CT_KERNEL_LINUX_INSTALL_CHECK=y
+
+#
+# Binary utilities
+#
+CT_ARCH_BINFMT_ELF=y
+CT_BINUTILS="binutils"
+CT_BINUTILS_binutils=y
+## CT_BINUTILS_BINUTILS=y
+
+#
+# GNU binutils
+#
+CT_BINUTILS_CUSTOM=y
+## CT_BINUTILS_SRC_CUSTOM=y
+CT_BINUTILS_CUSTOM_LOCATION="/foo/binutils"
+## CT_BINUTILS_CUSTOM_LOCATION="/foo/binutils"
+CT_BINUTILS_CUSTOM_VERSION=""
+CT_BINUTILS_VERSION=""
+# CT_BINUTILS_V_2_28 is not set
+# CT_BINUTILS_V_2_27 is not set
+# CT_BINUTILS_V_2_26 is not set
+# CT_BINUTILS_V_2_25_1 is not set
+# CT_BINUTILS_V_2_24 is not set
+# CT_BINUTILS_V_2_23_2 is not set
+CT_BINUTILS_2_26_or_later=y
+CT_BINUTILS_2_25_1_or_later=y
+CT_BINUTILS_2_25_or_later=y
+CT_BINUTILS_2_24_or_later=y
+CT_BINUTILS_2_23_2_or_later=y
+CT_BINUTILS_HAS_HASH_STYLE=y
+CT_BINUTILS_HAS_GOLD=y
+CT_BINUTILS_HAS_PLUGINS=y
+CT_BINUTILS_HAS_PKGVERSION_BUGURL=y
+CT_BINUTILS_FORCE_LD_BFD_DEFAULT=y
+CT_BINUTILS_LINKER_LD=y
+CT_BINUTILS_LINKERS_LIST="ld"
+CT_BINUTILS_LINKER_DEFAULT="bfd"
+CT_BINUTILS_PLUGINS=y
+CT_BINUTILS_EXTRA_CONFIG_ARRAY=""
+# CT_BINUTILS_FOR_TARGET is not set
+
+#
+# binutils other options
+#
+
+#
+# C-library
+#
+CT_LIBC="glibc"
+CT_LIBC_VERSION=""
+CT_LIBC_glibc=y
+## CT_LIBC_GLIBC=y
+# CT_LIBC_musl is not set
+# CT_LIBC_uClibc is not set
+CT_LIBC_avr_libc_AVAILABLE=y
+CT_LIBC_glibc_AVAILABLE=y
+CT_THREADS="nptl"
+CT_LIBC_GLIBC_CUSTOM=y
+## CT_GLIBC_SRC_CUSTOM=y
+CT_LIBC_GLIBC_CUSTOM_LOCATION="/foo/glibc"
+## CT_GLIBC_CUSTOM_LOCATION="/foo/glibc"
+CT_LIBC_GLIBC_CUSTOM_VERSION=""
+# CT_LIBC_GLIBC_V_2_25 is not set
+# CT_LIBC_GLIBC_V_2_24 is not set
+# CT_LIBC_GLIBC_V_2_23 is not set
+# CT_LIBC_GLIBC_V_2_22 is not set
+# CT_LIBC_GLIBC_V_2_21 is not set
+# CT_LIBC_GLIBC_V_2_20 is not set
+# CT_LIBC_GLIBC_V_2_19 is not set
+# CT_LIBC_GLIBC_V_2_18 is not set
+# CT_LIBC_GLIBC_V_2_17 is not set
+# CT_LIBC_GLIBC_V_2_16_0 is not set
+# CT_LIBC_GLIBC_V_2_15 is not set
+# CT_LIBC_GLIBC_V_2_14_1 is not set
+# CT_LIBC_GLIBC_V_2_14 is not set
+# CT_LIBC_GLIBC_V_2_13 is not set
+# CT_LIBC_GLIBC_V_2_12_1 is not set
+CT_LIBC_GLIBC_2_20_or_later=y
+CT_LIBC_GLIBC_2_17_or_later=y
+CT_LIBC_mingw_AVAILABLE=y
+CT_LIBC_musl_AVAILABLE=y
+CT_LIBC_newlib_AVAILABLE=y
+CT_LIBC_none_AVAILABLE=y
+CT_LIBC_uClibc_AVAILABLE=y
+CT_LIBC_SUPPORT_THREADS_ANY=y
+CT_LIBC_SUPPORT_THREADS_NATIVE=y
+
+#
+# Common C library options
+#
+CT_THREADS_NATIVE=y
+# CT_CREATE_LDSO_CONF is not set
+CT_LIBC_XLDD=y
+
+#
+# glibc other options
+#
+CT_LIBC_GLIBC_NEEDS_PORTS=y
+CT_LIBC_glibc_family=y
+CT_LIBC_GLIBC_EXTRA_CONFIG_ARRAY="CONFIG_GLIBC=xxx"
+## CT_GLIBC_EXTRA_CONFIG_ARRAY="CONFIG_GLIBC=xxx"
+CT_LIBC_GLIBC_CONFIGPARMS="FOO=bar"
+## CT_GLIBC_CONFIGPARMS="FOO=bar"
+CT_LIBC_GLIBC_EXTRA_CFLAGS="-fxxx"
+## CT_GLIBC_EXTRA_CFLAGS="-fxxx"
+CT_LIBC_ENABLE_FORTIFIED_BUILD=y
+## CT_GLIBC_ENABLE_FORTIFIED_BUILD=y
+CT_LIBC_DISABLE_VERSIONING=y
+## CT_GLIBC_DISABLE_VERSIONING=y
+CT_LIBC_OLDEST_ABI=""
+## CT_GLIBC_OLDEST_ABI=""
+CT_LIBC_GLIBC_FORCE_UNWIND=y
+## CT_GLIBC_FORCE_UNWIND=y
+CT_LIBC_ADDONS_LIST=""
+CT_LIBC_LOCALES=y
+## CT_GLIBC_LOCALES=y
+
+#
+# WARNING!                                                      
+#
+
+#
+#   The built locales will be usable if and only if the build  
+#
+
+#
+#   machine and the target:                                    
+#
+
+#
+#    - have the same endianness,                               
+#
+
+#
+#    - and have the same alignment requirements for uint32_t.  
+#
+
+#
+#   You will have to check by yourself (for now).              
+#
+
+#
+# WARNING!                                                      
+#
+
+#
+#   Building GLIBC locales requires that GLIBC supports        
+#
+
+#
+#   the build machine as the target.                           
+#
+# CT_LIBC_GLIBC_KERNEL_VERSION_NONE is not set
+# CT_LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS is not set
+CT_LIBC_GLIBC_KERNEL_VERSION_CHOSEN=y
+## CT_GLIBC_KERNEL_VERSION_CHOSEN=y
+CT_LIBC_GLIBC_MIN_KERNEL_VERSION="2.6.9"
+## CT_GLIBC_MIN_KERNEL_VERSION="2.6.9"
+CT_LIBC_GLIBC_MIN_KERNEL="2.6.9"
+
+#
+# C compiler
+#
+CT_CC="gcc"
+CT_CC_CORE_PASSES_NEEDED=y
+CT_CC_CORE_PASS_1_NEEDED=y
+CT_CC_CORE_PASS_2_NEEDED=y
+CT_CC_gcc=y
+## CT_CC_GCC=y
+CT_CC_GCC_CUSTOM=y
+## CT_GCC_SRC_CUSTOM=y
+CT_CC_GCC_CUSTOM_LOCATION="/foo/gcc"
+## CT_GCC_CUSTOM_LOCATION="/foo/gcc"
+CT_CC_GCC_CUSTOM_VERSION=""
+CT_CC_GCC_VERSION=""
+# CT_CC_GCC_V_6_3_0 is not set
+# CT_CC_GCC_V_5_4_0 is not set
+# CT_CC_GCC_V_4_9_4 is not set
+# CT_CC_GCC_V_4_8_5 is not set
+CT_CC_GCC_4_8_or_later=y
+CT_CC_GCC_4_9_or_later=y
+CT_CC_GCC_5_or_later=y
+CT_CC_GCC_6_or_later=y
+CT_CC_GCC_latest=y
+CT_CC_GCC_ENABLE_PLUGINS=y
+CT_CC_GCC_HAS_LIBMPX=y
+CT_CC_GCC_ENABLE_CXX_FLAGS=""
+CT_CC_GCC_CORE_EXTRA_CONFIG_ARRAY=""
+CT_CC_GCC_EXTRA_CONFIG_ARRAY=""
+CT_CC_GCC_STATIC_LIBSTDCXX=y
+# CT_CC_GCC_SYSTEM_ZLIB is not set
+CT_CC_GCC_CONFIG_TLS=m
+
+#
+# Optimisation features
+#
+CT_CC_GCC_USE_GRAPHITE=y
+CT_CC_GCC_USE_LTO=y
+
+#
+# Settings for libraries running on target
+#
+CT_CC_GCC_ENABLE_TARGET_OPTSPACE=y
+# CT_CC_GCC_LIBMUDFLAP is not set
+# CT_CC_GCC_LIBGOMP is not set
+# CT_CC_GCC_LIBSSP is not set
+# CT_CC_GCC_LIBQUADMATH is not set
+# CT_CC_GCC_LIBSANITIZER is not set
+
+#
+# Misc. obscure options.
+#
+CT_CC_CXA_ATEXIT=y
+# CT_CC_GCC_DISABLE_PCH is not set
+CT_CC_GCC_SJLJ_EXCEPTIONS=m
+CT_CC_GCC_LDBL_128=m
+# CT_CC_GCC_BUILD_ID is not set
+CT_CC_GCC_LNK_HASH_STYLE_DEFAULT=y
+# CT_CC_GCC_LNK_HASH_STYLE_SYSV is not set
+# CT_CC_GCC_LNK_HASH_STYLE_GNU is not set
+# CT_CC_GCC_LNK_HASH_STYLE_BOTH is not set
+CT_CC_GCC_LNK_HASH_STYLE=""
+CT_CC_GCC_DEC_FLOAT_AUTO=y
+# CT_CC_GCC_DEC_FLOAT_BID is not set
+# CT_CC_GCC_DEC_FLOAT_DPD is not set
+# CT_CC_GCC_DEC_FLOATS_NO is not set
+CT_CC_SUPPORT_CXX=y
+CT_CC_SUPPORT_FORTRAN=y
+CT_CC_SUPPORT_JAVA=y
+CT_CC_SUPPORT_ADA=y
+CT_CC_SUPPORT_OBJC=y
+CT_CC_SUPPORT_OBJCXX=y
+CT_CC_SUPPORT_GOLANG=y
+
+#
+# Additional supported languages:
+#
+CT_CC_LANG_CXX=y
+# CT_CC_LANG_FORTRAN is not set
+# CT_CC_LANG_JAVA is not set
+# CT_CC_LANG_ADA is not set
+# CT_CC_LANG_OBJC is not set
+# CT_CC_LANG_OBJCXX is not set
+# CT_CC_LANG_GOLANG is not set
+CT_CC_LANG_OTHERS=""
+
+#
+# Debug facilities
+#
+CT_DEBUG_duma=y
+## CT_DEBUG_DUMA=y
+CT_DUMA_SO=y
+CT_DUMA_CUSTOM_WRAPPER=y
+CT_DUMA_V_2_5_15=y
+CT_DUMA_VERSION="2_5_15"
+CT_DEBUG_gdb=y
+## CT_DEBUG_GDB=y
+CT_GDB_CROSS=y
+# CT_GDB_CROSS_STATIC is not set
+# CT_GDB_CROSS_SIM is not set
+CT_GDB_CROSS_PYTHON=y
+CT_GDB_CROSS_PYTHON_BINARY=""
+CT_GDB_CROSS_EXTRA_CONFIG_ARRAY=""
+# CT_GDB_NATIVE is not set
+CT_GDB_GDBSERVER=y
+CT_GDB_GDBSERVER_HAS_IPA_LIB=y
+# CT_GDB_GDBSERVER_STATIC is not set
+# CT_GDB_GDBSERVER_BUILD_IPA_LIB is not set
+
+#
+# gdb version
+#
+CT_GDB_CUSTOM=y
+## CT_GDB_SRC_CUSTOM=y
+CT_GDB_CUSTOM_LOCATION="/foo/gdb"
+## CT_GDB_CUSTOM_LOCATION="/foo/gdb"
+CT_GDB_CUSTOM_VERSION=""
+CT_GDB_VERSION=""
+# CT_GDB_V_7_12_1 is not set
+# CT_GDB_V_7_11_1 is not set
+# CT_GDB_V_7_10_1 is not set
+# CT_GDB_V_7_10 is not set
+# CT_GDB_V_7_9_1 is not set
+# CT_GDB_V_7_9 is not set
+# CT_GDB_V_7_8_2 is not set
+# CT_GDB_V_7_8_1 is not set
+# CT_GDB_V_7_8 is not set
+# CT_GDB_V_7_7_1 is not set
+# CT_GDB_V_7_7 is not set
+# CT_GDB_V_7_6_1 is not set
+# CT_GDB_V_7_5_1 is not set
+# CT_GDB_V_7_4_1 is not set
+# CT_GDB_V_7_4 is not set
+# CT_GDB_V_7_3_1 is not set
+# CT_GDB_V_7_3a is not set
+# CT_GDB_V_7_2a is not set
+# CT_GDB_V_7_1a is not set
+# CT_GDB_V_7_0_1a is not set
+# CT_GDB_V_7_0a is not set
+# CT_GDB_V_6_8a is not set
+CT_GDB_7_12_or_later=y
+CT_GDB_7_2_or_later=y
+CT_GDB_7_0_or_later=y
+CT_GDB_HAS_PKGVERSION_BUGURL=y
+CT_GDB_HAS_PYTHON=y
+CT_GDB_INSTALL_GDBINIT=y
+CT_DEBUG_ltrace=y
+## CT_DEBUG_LTRACE=y
+CT_LTRACE_V_0_7_3=y
+# CT_LTRACE_V_0_5_3 is not set
+CT_LTRACE_VERSION="0.7.3"
+CT_DEBUG_strace=y
+## CT_DEBUG_STRACE=y
+# CT_STRACE_V_4_16 is not set
+# CT_STRACE_V_4_15 is not set
+# CT_STRACE_V_4_14 is not set
+# CT_STRACE_V_4_13 is not set
+# CT_STRACE_V_4_12 is not set
+# CT_STRACE_V_4_11 is not set
+# CT_STRACE_V_4_10 is not set
+# CT_STRACE_V_4_9 is not set
+# CT_STRACE_V_4_8 is not set
+# CT_STRACE_V_4_7 is not set
+# CT_STRACE_V_4_6 is not set
+# CT_STRACE_V_4_5_20 is not set
+# CT_STRACE_V_4_5_19 is not set
+CT_STRACE_V_4_5_18=y
+## CT_STRACE_V_4_5_20=y
+CT_STRACE_VERSION="4.5.18"
+
+#
+# Companion libraries
+#
+CT_COMPLIBS_NEEDED=y
+CT_LIBICONV_NEEDED=y
+CT_GETTEXT_NEEDED=y
+CT_GMP_NEEDED=y
+CT_MPFR_NEEDED=y
+CT_ISL_NEEDED=y
+CT_MPC_NEEDED=y
+CT_EXPAT_NEEDED=y
+CT_NCURSES_NEEDED=y
+CT_COMPLIBS=y
+CT_LIBICONV=y
+CT_GETTEXT=y
+CT_GMP=y
+CT_MPFR=y
+CT_ISL=y
+CT_MPC=y
+CT_LIBELF_TARGET=y
+CT_EXPAT=y
+CT_NCURSES=y
+# CT_ZLIB is not set
+CT_LIBICONV_V_1_15=y
+# CT_LIBICONV_V_1_14 is not set
+CT_LIBICONV_VERSION="1.15"
+CT_GETTEXT_V_0_19_8_1=y
+# CT_GETTEXT_V_0_19_7 is not set
+CT_GETTEXT_VERSION="0.19.8.1"
+# CT_GMP_V_6_1_2 is not set
+# CT_GMP_V_6_1_0 is not set
+# CT_GMP_V_6_0_0 is not set
+# CT_GMP_V_5_1_3 is not set
+# CT_GMP_V_5_1_1 is not set
+# CT_GMP_V_5_0_2 is not set
+# CT_GMP_V_5_0_1 is not set
+# CT_GMP_V_4_3_2 is not set
+# CT_GMP_V_4_3_1 is not set
+CT_GMP_V_4_3_0=y
+## CT_GMP_V_4_3=y
+CT_GMP_VERSION="4.3.0"
+# CT_MPFR_V_3_1_5 is not set
+# CT_MPFR_V_3_1_3 is not set
+# CT_MPFR_V_3_1_2 is not set
+# CT_MPFR_V_3_1_0 is not set
+# CT_MPFR_V_3_0_1 is not set
+# CT_MPFR_V_3_0_0 is not set
+# CT_MPFR_V_2_4_2 is not set
+# CT_MPFR_V_2_4_1 is not set
+CT_MPFR_V_2_4_0=y
+## CT_MPFR_V_2_4=y
+CT_MPFR_VERSION="2.4.0"
+# CT_ISL_V_0_18 is not set
+# CT_ISL_V_0_17_1 is not set
+# CT_ISL_V_0_16_1 is not set
+# CT_ISL_V_0_15 is not set
+CT_ISL_V_0_14=y
+## CT_ISL_V_0_14
+CT_ISL_V_0_14_or_later=y
+CT_ISL_V_0_12_or_later=y
+CT_ISL_VERSION="0.14"
+# CT_MPC_V_1_0_3 is not set
+# CT_MPC_V_1_0_2 is not set
+# CT_MPC_V_1_0_1 is not set
+# CT_MPC_V_1_0 is not set
+# CT_MPC_V_0_9 is not set
+# CT_MPC_V_0_8_2 is not set
+CT_MPC_V_0_8_1=y
+## CT_MPC_V_0_8=y
+# CT_MPC_V_0_7 is not set
+CT_MPC_VERSION="0.8.1"
+
+#
+# libelf version needed to build for target
+#
+# CT_LIBELF_V_0_8_13 is not set
+CT_LIBELF_V_0_8_12=y
+## CT_LIBELF_V_0_8
+CT_LIBELF_VERSION="0.8.12"
+CT_EXPAT_V_2_2_0=y
+# CT_EXPAT_V_2_1_1 is not set
+CT_EXPAT_VERSION="2.2.0"
+CT_NCURSES_V_6_0=y
+CT_NCURSES_VERSION="6.0"
+# CT_NCURSES_NEW_ABI is not set
+CT_NCURSES_HOST_CONFIG_ARGS=""
+CT_NCURSES_HOST_DISABLE_DB=y
+CT_NCURSES_HOST_FALLBACKS="linux,xterm,xterm-color,xterm-256color,vt100"
+CT_NCURSES_TARGET_CONFIG_ARGS=""
+# CT_NCURSES_TARGET_DISABLE_DB is not set
+CT_NCURSES_TARGET_FALLBACKS=""
+
+#
+# Companion libraries common options
+#
+# CT_COMPLIBS_CHECK is not set
+
+#
+# Companion tools
+#
+# CT_COMP_TOOLS_FOR_HOST is not set
+# CT_COMP_TOOLS_autoconf is not set
+# CT_AUTOCONF_V_2_69 is not set
+# CT_AUTOCONF_V_2_65 is not set
+CT_COMP_TOOLS_automake=y
+## CT_COMP_TOOLS_automake
+# CT_AUTOMAKE_V_1_15 is not set
+# CT_AUTOMAKE_V_1_14 is not set
+# CT_AUTOMAKE_V_1_11_6 is not set
+CT_AUTOMAKE_V_1_11_1=y
+## CT_AUTOMAKE_V_1_11=y
+CT_AUTOMAKE_VERSION="1.11.1"
+# CT_COMP_TOOLS_libtool is not set
+CT_COMP_TOOLS_m4=y
+## CT_COMP_TOOLS_M4=y
+# CT_M4_V_1_4_18 is not set
+# CT_M4_V_1_4_17 is not set
+CT_M4_V_1_4_13=y
+## CT_M4_V_1_4=y
+CT_M4_VERSION="1.4.13"
+# CT_COMP_TOOLS_make is not set
+
+#
+# Test suite
+#
+# CT_TEST_SUITE_GCC is not set
diff --git a/testing/upgrade/samples/v0-0001.config b/testing/upgrade/samples/v0-0001.config
new file mode 100644
index 0000000..df62759
--- /dev/null
+++ b/testing/upgrade/samples/v0-0001.config
@@ -0,0 +1,716 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Crosstool-NG Configuration
+#
+CT_CONFIGURE_has_static_link=y
+CT_CONFIGURE_has_wget=y
+CT_CONFIGURE_has_stat_flavor_GNU=y
+CT_CONFIGURE_has_make_3_81_or_newer=y
+CT_CONFIGURE_has_libtool_2_4_or_newer=y
+CT_CONFIGURE_has_libtoolize_2_4_or_newer=y
+CT_CONFIGURE_has_autoconf_2_63_or_newer=y
+CT_CONFIGURE_has_autoreconf_2_63_or_newer=y
+CT_CONFIGURE_has_automake_1_15_or_newer=y
+CT_CONFIGURE_has_gnu_m4_1_4_12_or_newer=y
+CT_CONFIGURE_has_svn=y
+CT_CONFIGURE_has_git=y
+CT_MODULES=y
+
+#
+# Paths and misc options
+#
+
+#
+# crosstool-NG behavior
+#
+CT_OBSOLETE=y
+CT_EXPERIMENTAL=y
+# CT_ALLOW_BUILD_AS_ROOT is not set
+# CT_DEBUG_CT is not set
+
+#
+# Paths
+#
+CT_LOCAL_TARBALLS_DIR="${HOME}/src"
+CT_SAVE_TARBALLS=y
+CT_WORK_DIR="${CT_TOP_DIR}/.build"
+CT_BUILD_TOP_DIR="${CT_WORK_DIR}/${CT_HOST:+HOST-${CT_HOST}/}${CT_TARGET}"
+CT_PREFIX_DIR="${CT_PREFIX:-${HOME}/x-tools}/${CT_HOST:+HOST-${CT_HOST}/}${CT_TARGET}"
+CT_RM_RF_PREFIX_DIR=y
+CT_REMOVE_DOCS=y
+CT_PREFIX_DIR_RO=y
+CT_STRIP_HOST_TOOLCHAIN_EXECUTABLES=y
+# CT_STRIP_TARGET_TOOLCHAIN_EXECUTABLES is not set
+
+#
+# Downloading
+#
+CT_DOWNLOAD_AGENT_WGET=y
+# CT_DOWNLOAD_AGENT_NONE is not set
+# CT_FORBID_DOWNLOAD is not set
+# CT_FORCE_DOWNLOAD is not set
+CT_CONNECT_TIMEOUT=10
+CT_DOWNLOAD_WGET_OPTIONS="--passive-ftp --tries=3 -nc --progress=dot:binary"
+# CT_ONLY_DOWNLOAD is not set
+# CT_USE_MIRROR is not set
+
+#
+# Extracting
+#
+# CT_FORCE_EXTRACT is not set
+CT_OVERRIDE_CONFIG_GUESS_SUB=y
+# CT_ONLY_EXTRACT is not set
+CT_PATCH_BUNDLED=y
+# CT_PATCH_LOCAL is not set
+# CT_PATCH_BUNDLED_LOCAL is not set
+# CT_PATCH_LOCAL_BUNDLED is not set
+# CT_PATCH_BUNDLED_FALLBACK_LOCAL is not set
+# CT_PATCH_LOCAL_FALLBACK_BUNDLED is not set
+# CT_PATCH_NONE is not set
+CT_PATCH_ORDER="bundled"
+
+#
+# Build behavior
+#
+CT_PARALLEL_JOBS=0
+CT_LOAD=""
+CT_USE_PIPES=y
+CT_EXTRA_CFLAGS_FOR_BUILD=""
+CT_EXTRA_LDFLAGS_FOR_BUILD=""
+CT_EXTRA_CFLAGS_FOR_HOST=""
+CT_EXTRA_LDFLAGS_FOR_HOST=""
+# CT_CONFIG_SHELL_SH is not set
+# CT_CONFIG_SHELL_ASH is not set
+CT_CONFIG_SHELL_BASH=y
+# CT_CONFIG_SHELL_CUSTOM is not set
+CT_CONFIG_SHELL="${bash}"
+
+#
+# Logging
+#
+# CT_LOG_ERROR is not set
+# CT_LOG_WARN is not set
+# CT_LOG_INFO is not set
+CT_LOG_EXTRA=y
+# CT_LOG_ALL is not set
+# CT_LOG_DEBUG is not set
+CT_LOG_LEVEL_MAX="EXTRA"
+# CT_LOG_SEE_TOOLS_WARN is not set
+CT_LOG_PROGRESS_BAR=y
+CT_LOG_TO_FILE=y
+CT_LOG_FILE_COMPRESS=y
+
+#
+# Target options
+#
+CT_ARCH="m68k"
+# CT_ARCH_alpha is not set
+# CT_ARCH_arm is not set
+# CT_ARCH_avr is not set
+CT_ARCH_m68k=y
+## CT_ARCH_M68K=y
+# CT_ARCH_microblaze is not set
+# CT_ARCH_mips is not set
+# CT_ARCH_nios2 is not set
+# CT_ARCH_powerpc is not set
+# CT_ARCH_s390 is not set
+# CT_ARCH_sh is not set
+# CT_ARCH_sparc is not set
+# CT_ARCH_x86 is not set
+# CT_ARCH_xtensa is not set
+CT_ARCH_alpha_AVAILABLE=y
+CT_ARCH_arm_AVAILABLE=y
+CT_ARCH_avr_AVAILABLE=y
+CT_ARCH_m68k_AVAILABLE=y
+CT_ARCH_microblaze_AVAILABLE=y
+CT_ARCH_mips_AVAILABLE=y
+CT_ARCH_nios2_AVAILABLE=y
+CT_ARCH_powerpc_AVAILABLE=y
+CT_ARCH_s390_AVAILABLE=y
+CT_ARCH_sh_AVAILABLE=y
+CT_ARCH_sparc_AVAILABLE=y
+CT_ARCH_x86_AVAILABLE=y
+CT_ARCH_xtensa_AVAILABLE=y
+CT_ARCH_SUFFIX=""
+
+#
+# Generic target options
+#
+# CT_MULTILIB is not set
+CT_DEMULTILIB=y
+CT_ARCH_DEFAULT_BE=y
+# CT_ARCH_BE is not set
+# CT_ARCH_LE is not set
+CT_ARCH_SUPPORTS_32=y
+CT_ARCH_DEFAULT_32=y
+CT_ARCH_BITNESS=32
+CT_ARCH_32=y
+# CT_ARCH_64 is not set
+
+#
+# Target optimisations
+#
+CT_ARCH_SUPPORTS_WITH_CPU=y
+CT_ARCH_CPU=""
+# CT_ARCH_FLOAT_AUTO is not set
+# CT_ARCH_FLOAT_HW is not set
+# CT_ARCH_FLOAT_SOFTFP is not set
+# CT_ARCH_FLOAT_SW is not set
+CT_TARGET_CFLAGS=""
+CT_TARGET_LDFLAGS=""
+CT_ARCH_FLOAT=""
+# CT_ARCH_ALPHA_EV4 is not set
+# CT_ARCH_ALPHA_EV45 is not set
+# CT_ARCH_ALPHA_EV5 is not set
+# CT_ARCH_ALPHA_EV56 is not set
+# CT_ARCH_ALPHA_EV6 is not set
+# CT_ARCH_ALPHA_EV67 is not set
+# CT_ARCH_ARM_MODE_ARM is not set
+# CT_ARCH_ARM_MODE_THUMB is not set
+
+#
+# Toolchain options
+#
+
+#
+# General toolchain options
+#
+CT_USE_SYSROOT=y
+CT_SYSROOT_NAME="sysroot"
+CT_SYSROOT_DIR_PREFIX=""
+CT_WANTS_STATIC_LINK=y
+CT_WANTS_STATIC_LINK_CXX=y
+# CT_STATIC_TOOLCHAIN is not set
+CT_TOOLCHAIN_PKGVERSION=""
+CT_TOOLCHAIN_BUGURL=""
+
+#
+# Tuple completion and aliasing
+#
+CT_TARGET_VENDOR="unknown"
+CT_TARGET_ALIAS_SED_EXPR=""
+CT_TARGET_ALIAS=""
+
+#
+# Toolchain type
+#
+# CT_NATIVE is not set
+CT_CROSS=y
+# CT_CROSS_NATIVE is not set
+# CT_CANADIAN is not set
+CT_TOOLCHAIN_TYPE="cross"
+
+#
+# Build system
+#
+CT_BUILD=""
+CT_BUILD_PREFIX=""
+CT_BUILD_SUFFIX=""
+
+#
+# Misc options
+#
+# CT_TOOLCHAIN_ENABLE_NLS is not set
+
+#
+# Operating System
+#
+CT_KERNEL_SUPPORTS_SHARED_LIBS=y
+CT_KERNEL="linux"
+CT_KERNEL_VERSION="2.6.37.6"
+# CT_KERNEL_bare_metal is not set
+CT_KERNEL_linux=y
+CT_KERNEL_bare_metal_AVAILABLE=y
+CT_KERNEL_linux_AVAILABLE=y
+# CT_KERNEL_LINUX_CUSTOM is not set
+# CT_KERNEL_V_4_10 is not set
+# CT_KERNEL_V_4_9 is not set
+# CT_KERNEL_V_4_8 is not set
+# CT_KERNEL_V_4_7 is not set
+# CT_KERNEL_V_4_6 is not set
+# CT_KERNEL_V_4_5 is not set
+# CT_KERNEL_V_4_4 is not set
+# CT_KERNEL_V_4_3 is not set
+# CT_KERNEL_V_4_2 is not set
+# CT_KERNEL_V_4_1 is not set
+# CT_KERNEL_V_4_0 is not set
+# CT_KERNEL_V_3_19 is not set
+# CT_KERNEL_V_3_18 is not set
+# CT_KERNEL_V_3_17 is not set
+# CT_KERNEL_V_3_16 is not set
+# CT_KERNEL_V_3_15 is not set
+# CT_KERNEL_V_3_14 is not set
+# CT_KERNEL_V_3_13 is not set
+# CT_KERNEL_V_3_12 is not set
+# CT_KERNEL_V_3_11 is not set
+# CT_KERNEL_V_3_10 is not set
+# CT_KERNEL_V_3_9 is not set
+# CT_KERNEL_V_3_8 is not set
+# CT_KERNEL_V_3_7 is not set
+# CT_KERNEL_V_3_6 is not set
+# CT_KERNEL_V_3_5 is not set
+# CT_KERNEL_V_3_4 is not set
+# CT_KERNEL_V_3_3 is not set
+# CT_KERNEL_V_3_2 is not set
+# CT_KERNEL_V_3_1 is not set
+# CT_KERNEL_V_3_0 is not set
+# CT_KERNEL_V_2_6_39 is not set
+# CT_KERNEL_V_2_6_38 is not set
+CT_KERNEL_V_2_6_37=y
+## CT_LINUX_V_2_6_37=y
+# CT_KERNEL_V_2_6_36 is not set
+# CT_KERNEL_V_2_6_35 is not set
+# CT_KERNEL_V_2_6_34 is not set
+# CT_KERNEL_V_2_6_33 is not set
+# CT_KERNEL_V_2_6_32 is not set
+CT_KERNEL_windows_AVAILABLE=y
+
+#
+# Common kernel options
+#
+CT_SHARED_LIBS=y
+
+#
+# linux other options
+#
+CT_KERNEL_LINUX_VERBOSITY_0=y
+# CT_KERNEL_LINUX_VERBOSITY_1 is not set
+# CT_KERNEL_LINUX_VERBOSITY_2 is not set
+CT_KERNEL_LINUX_VERBOSE_LEVEL=0
+CT_KERNEL_LINUX_INSTALL_CHECK=y
+
+#
+# Binary utilities
+#
+# CT_ARCH_BINFMT_ELF is not set
+CT_ARCH_BINFMT_FLAT=y
+# CT_ARCH_BINFMT_FDPIC is not set
+CT_BINUTILS="binutils"
+CT_BINUTILS_binutils=y
+
+#
+# GNU binutils
+#
+# CT_BINUTILS_CUSTOM is not set
+CT_BINUTILS_VERSION="linaro-2.23.2-2013.10-4"
+CT_BINUTILS_SHOW_LINARO=y
+# CT_BINUTILS_V_2_28 is not set
+# CT_BINUTILS_V_2_27 is not set
+# CT_BINUTILS_V_2_26 is not set
+# CT_BINUTILS_V_2_25_1 is not set
+# CT_BINUTILS_LINARO_V_2_25 is not set
+# CT_BINUTILS_LINARO_V_2_24 is not set
+# CT_BINUTILS_V_2_24 is not set
+CT_BINUTILS_LINARO_V_2_23_2=y
+## CT_BINUTILS_LINARO_V_2_23=y
+# CT_BINUTILS_V_2_23_2 is not set
+CT_BINUTILS_2_23_2_or_later=y
+CT_BINUTILS_HAS_HASH_STYLE=y
+CT_BINUTILS_HAS_GOLD=y
+CT_BINUTILS_HAS_PLUGINS=y
+CT_BINUTILS_HAS_PKGVERSION_BUGURL=y
+CT_BINUTILS_FORCE_LD_BFD_ONLY=y
+CT_BINUTILS_LINKER_LD=y
+CT_BINUTILS_LINKERS_LIST="ld"
+CT_BINUTILS_LINKER_DEFAULT="bfd"
+CT_BINUTILS_PLUGINS=y
+CT_BINUTILS_EXTRA_CONFIG_ARRAY=""
+# CT_BINUTILS_FOR_TARGET is not set
+
+#
+# binutils other options
+#
+CT_ELF2FLT_REQUIRES=y
+
+#
+# elf2flt
+#
+# CT_ELF2FLT_GIT is not set
+CT_ELF2FLT_CUSTOM=y
+## CT_ELF2FLT_SRC_CUSTOM=y
+CT_ELF2FLT_VERSION=""
+CT_ELF2FLT_CUSTOM_LOCATION="/foo/elf2flt"
+## CT_ELF2FLT_CUSTOM_LOCATION="/foo/elf2flt"
+CT_ELF2FLT_CUSTOM_VERSION=""
+CT_ELF2FLT_EXTRA_CONFIG_ARRAY=""
+
+#
+# C-library
+#
+CT_LIBC="uClibc"
+CT_LIBC_VERSION=""
+# CT_LIBC_glibc is not set
+# CT_LIBC_musl is not set
+CT_LIBC_uClibc=y
+## CT_LIBC_UCLIBC=y
+## CT_UCLIBC_USE_UCLIBC_ORG=y
+CT_LIBC_avr_libc_AVAILABLE=y
+CT_LIBC_glibc_AVAILABLE=y
+CT_THREADS="nptl"
+CT_LIBC_mingw_AVAILABLE=y
+CT_LIBC_musl_AVAILABLE=y
+# CT_LIBC_MUSL_V_1_1_16 is not set
+# CT_LIBC_MUSL_V_1_1_15 is not set
+CT_LIBC_newlib_AVAILABLE=y
+CT_LIBC_none_AVAILABLE=y
+CT_LIBC_uClibc_AVAILABLE=y
+CT_LIBC_UCLIBC_CUSTOM=y
+## CT_UCLIBC_SRC_CUSTOM=y
+CT_LIBC_UCLIBC_CUSTOM_UCLIBC=y
+# CT_LIBC_UCLIBC_CUSTOM_UCLIBC_NG is not set
+# CT_LIBC_UCLIBC_CUSTOM_UCLIBC_NG_OLD is not set
+CT_LIBC_UCLIBC_CUSTOM_LOCATION="/foo/uclibc"
+## CT_UCLIBC_CUSTOM_LOCATION="/foo/uclibc"
+CT_LIBC_UCLIBC_CUSTOM_VERSION=""
+# CT_LIBC_UCLIBC_NG_V_1_0_22 is not set
+# CT_LIBC_UCLIBC_NG_V_1_0_21 is not set
+# CT_LIBC_UCLIBC_NG_V_1_0_20 is not set
+# CT_LIBC_UCLIBC_V_0_9_33_2 is not set
+CT_LIBC_UCLIBC_0_9_33_2_or_later=y
+CT_LIBC_UCLIBC_PARALLEL=y
+CT_LIBC_UCLIBC_VERBOSITY_0=y
+# CT_LIBC_UCLIBC_VERBOSITY_1 is not set
+# CT_LIBC_UCLIBC_VERBOSITY_2 is not set
+CT_LIBC_UCLIBC_VERBOSITY=""
+CT_LIBC_UCLIBC_DEBUG_LEVEL_0=y
+# CT_LIBC_UCLIBC_DEBUG_LEVEL_1 is not set
+# CT_LIBC_UCLIBC_DEBUG_LEVEL_2 is not set
+# CT_LIBC_UCLIBC_DEBUG_LEVEL_3 is not set
+CT_LIBC_UCLIBC_DEBUG_LEVEL=0
+CT_LIBC_UCLIBC_CONFIG_FILE=""
+CT_LIBC_SUPPORT_THREADS_ANY=y
+CT_LIBC_SUPPORT_THREADS_NATIVE=y
+CT_LIBC_SUPPORT_THREADS_LT=y
+CT_LIBC_SUPPORT_THREADS_NONE=y
+
+#
+# Common C library options
+#
+CT_THREADS_NATIVE=y
+# CT_THREADS_LT is not set
+# CT_THREADS_NONE is not set
+# CT_CREATE_LDSO_CONF is not set
+CT_LIBC_XLDD=y
+# CT_LIBC_GLIBC_KERNEL_VERSION_NONE is not set
+# CT_LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS is not set
+# CT_LIBC_GLIBC_KERNEL_VERSION_CHOSEN is not set
+# CT_LIBC_MUSL_OPTIMIZE_NONE is not set
+# CT_LIBC_MUSL_OPTIMIZE_AUTO is not set
+# CT_LIBC_MUSL_OPTIMIZE_SPEED is not set
+# CT_LIBC_MUSL_OPTIMIZE_SIZE is not set
+
+#
+# uClibc other options
+#
+CT_LIBC_UCLIBC_LNXTHRD=""
+# CT_LIBC_UCLIBC_LOCALES is not set
+# CT_LIBC_UCLIBC_IPV6 is not set
+# CT_LIBC_UCLIBC_WCHAR is not set
+# CT_LIBC_UCLIBC_FENV is not set
+# CT_LIBC_UCLIBC_RPC is not set
+
+#
+# C compiler
+#
+CT_CC="gcc"
+CT_CC_CORE_PASSES_NEEDED=y
+CT_CC_CORE_PASS_1_NEEDED=y
+CT_CC_CORE_PASS_2_NEEDED=y
+CT_CC_gcc=y
+# CT_CC_GCC_CUSTOM is not set
+CT_CC_GCC_VERSION="linaro-4.8-2015.06"
+CT_CC_GCC_SHOW_LINARO=y
+# CT_CC_GCC_V_linaro_6_3 is not set
+# CT_CC_GCC_V_6_3_0 is not set
+# CT_CC_GCC_V_linaro_5_4 is not set
+# CT_CC_GCC_V_5_4_0 is not set
+# CT_CC_GCC_V_linaro_4_9 is not set
+# CT_CC_GCC_V_4_9_4 is not set
+CT_CC_GCC_V_linaro_4_8=y
+## CT_GCC_LINARO_V_4_8=y
+# CT_CC_GCC_V_4_8_5 is not set
+CT_CC_GCC_4_8=y
+CT_CC_GCC_4_8_or_later=y
+CT_CC_GCC_ENABLE_PLUGINS=y
+CT_CC_GCC_ENABLE_CXX_FLAGS=""
+CT_CC_GCC_CORE_EXTRA_CONFIG_ARRAY=""
+CT_CC_GCC_EXTRA_CONFIG_ARRAY=""
+CT_CC_GCC_STATIC_LIBSTDCXX=y
+# CT_CC_GCC_SYSTEM_ZLIB is not set
+CT_CC_GCC_CONFIG_TLS=m
+
+#
+# Optimisation features
+#
+CT_CC_GCC_USE_GRAPHITE=y
+CT_CC_GCC_USE_LTO=y
+
+#
+# Settings for libraries running on target
+#
+CT_CC_GCC_ENABLE_TARGET_OPTSPACE=y
+# CT_CC_GCC_LIBMUDFLAP is not set
+# CT_CC_GCC_LIBGOMP is not set
+# CT_CC_GCC_LIBSSP is not set
+# CT_CC_GCC_LIBQUADMATH is not set
+
+#
+# Misc. obscure options.
+#
+CT_CC_CXA_ATEXIT=y
+# CT_CC_GCC_DISABLE_PCH is not set
+CT_CC_GCC_SJLJ_EXCEPTIONS=m
+CT_CC_GCC_LDBL_128=m
+# CT_CC_GCC_BUILD_ID is not set
+CT_CC_GCC_LNK_HASH_STYLE_DEFAULT=y
+# CT_CC_GCC_LNK_HASH_STYLE_SYSV is not set
+# CT_CC_GCC_LNK_HASH_STYLE_GNU is not set
+# CT_CC_GCC_LNK_HASH_STYLE_BOTH is not set
+CT_CC_GCC_LNK_HASH_STYLE=""
+CT_CC_GCC_DEC_FLOAT_AUTO=y
+# CT_CC_GCC_DEC_FLOAT_BID is not set
+# CT_CC_GCC_DEC_FLOAT_DPD is not set
+# CT_CC_GCC_DEC_FLOATS_NO is not set
+CT_CC_SUPPORT_CXX=y
+CT_CC_SUPPORT_FORTRAN=y
+CT_CC_SUPPORT_JAVA=y
+CT_CC_SUPPORT_ADA=y
+CT_CC_SUPPORT_OBJC=y
+CT_CC_SUPPORT_OBJCXX=y
+CT_CC_SUPPORT_GOLANG=y
+
+#
+# Additional supported languages:
+#
+CT_CC_LANG_CXX=y
+# CT_CC_LANG_FORTRAN is not set
+# CT_CC_LANG_JAVA is not set
+# CT_CC_LANG_ADA is not set
+# CT_CC_LANG_OBJC is not set
+# CT_CC_LANG_OBJCXX is not set
+# CT_CC_LANG_GOLANG is not set
+CT_CC_LANG_OTHERS=""
+
+#
+# Debug facilities
+#
+# CT_DEBUG_duma is not set
+# CT_DUMA_V_2_5_15 is not set
+CT_DEBUG_gdb=y
+CT_GDB_CROSS=y
+# CT_GDB_CROSS_STATIC is not set
+# CT_GDB_CROSS_SIM is not set
+CT_GDB_CROSS_PYTHON=y
+CT_GDB_CROSS_PYTHON_BINARY=""
+CT_GDB_CROSS_EXTRA_CONFIG_ARRAY=""
+# CT_GDB_NATIVE is not set
+CT_GDB_GDBSERVER=y
+CT_GDB_GDBSERVER_HAS_IPA_LIB=y
+# CT_GDB_GDBSERVER_STATIC is not set
+# CT_GDB_GDBSERVER_BUILD_IPA_LIB is not set
+
+#
+# gdb version
+#
+# CT_GDB_CUSTOM is not set
+CT_GDB_VERSION="linaro-7.7-2014.05"
+CT_DEBUG_GDB_SHOW_LINARO=y
+# CT_GDB_V_7_12_1 is not set
+# CT_GDB_V_7_11_1 is not set
+# CT_GDB_V_7_10_1 is not set
+# CT_GDB_V_7_10 is not set
+# CT_GDB_V_7_9_1 is not set
+# CT_GDB_V_7_9 is not set
+# CT_GDB_V_linaro_7_8 is not set
+# CT_GDB_V_7_8_2 is not set
+# CT_GDB_V_7_8_1 is not set
+# CT_GDB_V_7_8 is not set
+# CT_GDB_V_linaro_7_7_1 is not set
+# CT_GDB_V_7_7_1 is not set
+CT_GDB_V_linaro_7_7=y
+## CT_GDB_LINARO_V_7_7=y
+# CT_GDB_V_7_7 is not set
+# CT_GDB_V_linaro_7_6 is not set
+# CT_GDB_V_7_6_1 is not set
+# CT_GDB_V_linaro_7_5 is not set
+# CT_GDB_V_7_5_1 is not set
+# CT_GDB_V_linaro_7_4 is not set
+# CT_GDB_V_7_4_1 is not set
+# CT_GDB_V_7_4 is not set
+# CT_GDB_V_linaro_7_3 is not set
+# CT_GDB_V_7_3_1 is not set
+# CT_GDB_V_7_3a is not set
+# CT_GDB_V_7_2a is not set
+# CT_GDB_V_7_1a is not set
+# CT_GDB_V_7_0_1a is not set
+# CT_GDB_V_7_0a is not set
+# CT_GDB_V_6_8a is not set
+CT_GDB_7_2_or_later=y
+CT_GDB_7_0_or_later=y
+CT_GDB_HAS_PKGVERSION_BUGURL=y
+CT_GDB_HAS_PYTHON=y
+CT_GDB_INSTALL_GDBINIT=y
+# CT_DEBUG_ltrace is not set
+# CT_LTRACE_V_0_7_3 is not set
+# CT_LTRACE_V_0_5_3 is not set
+CT_DEBUG_strace=y
+# CT_STRACE_V_4_16 is not set
+# CT_STRACE_V_4_15 is not set
+# CT_STRACE_V_4_14 is not set
+# CT_STRACE_V_4_13 is not set
+# CT_STRACE_V_4_12 is not set
+# CT_STRACE_V_4_11 is not set
+# CT_STRACE_V_4_10 is not set
+# CT_STRACE_V_4_9 is not set
+# CT_STRACE_V_4_8 is not set
+# CT_STRACE_V_4_7 is not set
+# CT_STRACE_V_4_6 is not set
+CT_STRACE_V_4_5_20=y
+## CT_STRACE_V_4_5_20=y
+# CT_STRACE_V_4_5_19 is not set
+# CT_STRACE_V_4_5_18 is not set
+CT_STRACE_VERSION="4.5.20"
+
+#
+# Companion libraries
+#
+CT_COMPLIBS_NEEDED=y
+CT_LIBICONV_NEEDED=y
+CT_GMP_NEEDED=y
+CT_MPFR_NEEDED=y
+CT_ISL_NEEDED=y
+CT_CLOOG_NEEDED=y
+CT_MPC_NEEDED=y
+CT_EXPAT_NEEDED=y
+CT_NCURSES_NEEDED=y
+CT_COMPLIBS=y
+CT_LIBICONV=y
+CT_GETTEXT=y
+CT_GMP=y
+CT_MPFR=y
+CT_ISL=y
+CT_CLOOG=y
+CT_MPC=y
+CT_EXPAT=y
+CT_NCURSES=y
+CT_ZLIB=y
+CT_ZLIB_V_1_2_11=y
+CT_ZLIB_VERSION="1.2.11"
+CT_LIBICONV_V_1_15=y
+# CT_LIBICONV_V_1_14 is not set
+CT_LIBICONV_VERSION="1.15"
+CT_GETTEXT_V_0_19_8_1=y
+# CT_GETTEXT_V_0_19_7 is not set
+CT_GETTEXT_VERSION="0.19.8.1"
+# CT_GMP_V_6_1_2 is not set
+# CT_GMP_V_6_1_0 is not set
+# CT_GMP_V_6_0_0 is not set
+# CT_GMP_V_5_1_3 is not set
+# CT_GMP_V_5_1_1 is not set
+# CT_GMP_V_5_0_2 is not set
+# CT_GMP_V_5_0_1 is not set
+# CT_GMP_V_4_3_2 is not set
+# CT_GMP_V_4_3_1 is not set
+CT_GMP_V_4_3_0=y
+## CT_GMP_V_4_3=y
+CT_GMP_VERSION="4.3.0"
+# CT_MPFR_V_3_1_5 is not set
+CT_MPFR_V_3_1_3=y
+## CT_MPFR_V_3_1=y
+# CT_MPFR_V_3_1_2 is not set
+# CT_MPFR_V_3_1_0 is not set
+# CT_MPFR_V_3_0_1 is not set
+# CT_MPFR_V_3_0_0 is not set
+# CT_MPFR_V_2_4_2 is not set
+# CT_MPFR_V_2_4_1 is not set
+# CT_MPFR_V_2_4_0 is not set
+CT_MPFR_VERSION="3.1.3"
+# CT_ISL_V_0_18 is not set
+# CT_ISL_V_0_17_1 is not set
+# CT_ISL_V_0_16_1 is not set
+# CT_ISL_V_0_15 is not set
+# CT_ISL_V_0_14 is not set
+# CT_ISL_V_0_12_2 is not set
+CT_ISL_V_0_11_1=y
+## CT_ISL_V_0_11=y
+CT_ISL_VERSION="0.11.1"
+# CT_CLOOG_V_0_18_4 is not set
+# CT_CLOOG_V_0_18_1 is not set
+CT_CLOOG_V_0_18_0=y
+## CT_CLOOG_V_0_18_1=y
+CT_CLOOG_VERSION="0.18.0"
+CT_CLOOG_0_18_or_later=y
+# CT_MPC_V_1_0_3 is not set
+CT_MPC_V_1_0_2=y
+## CT_MPC_V_1_0=y
+# CT_MPC_V_1_0_1 is not set
+# CT_MPC_V_1_0 is not set
+# CT_MPC_V_0_9 is not set
+# CT_MPC_V_0_8_2 is not set
+# CT_MPC_V_0_8_1 is not set
+# CT_MPC_V_0_7 is not set
+CT_MPC_VERSION="1.0.2"
+# CT_LIBELF_V_0_8_13 is not set
+# CT_LIBELF_V_0_8_12 is not set
+CT_EXPAT_V_2_2_0=y
+## CT_EXPAT_V_2_2=y
+# CT_EXPAT_V_2_1_1 is not set
+CT_EXPAT_VERSION="2.2.0"
+CT_NCURSES_V_6_0=y
+CT_NCURSES_VERSION="6.0"
+# CT_NCURSES_NEW_ABI is not set
+CT_NCURSES_HOST_CONFIG_ARGS=""
+CT_NCURSES_HOST_DISABLE_DB=y
+CT_NCURSES_HOST_FALLBACKS="linux,xterm,xterm-color,xterm-256color,vt100"
+CT_NCURSES_TARGET_CONFIG_ARGS=""
+# CT_NCURSES_TARGET_DISABLE_DB is not set
+CT_NCURSES_TARGET_FALLBACKS=""
+
+#
+# Companion libraries common options
+#
+# CT_COMPLIBS_CHECK is not set
+
+#
+# Companion tools
+#
+# CT_COMP_TOOLS_FOR_HOST is not set
+CT_COMP_TOOLS_autoconf=y
+## CT_COMP_TOOLS_AUTOCONF=y
+CT_AUTOCONF_V_2_69=y
+# CT_AUTOCONF_V_2_65 is not set
+CT_AUTOCONF_VERSION="2.69"
+CT_COMP_TOOLS_automake=y
+## CT_COMP_TOOLS_AUTOMAKE=y
+# CT_AUTOMAKE_V_1_15 is not set
+CT_AUTOMAKE_V_1_14=y
+## CT_AUTOMAKE_V_1_14=y
+# CT_AUTOMAKE_V_1_11_6 is not set
+# CT_AUTOMAKE_V_1_11_1 is not set
+CT_AUTOMAKE_VERSION="1.14"
+CT_COMP_TOOLS_libtool=y
+## CT_COMP_TOOLS_LIBTOOL=y
+CT_LIBTOOL_V_2_4_6=y
+## CT_LIBTOOL_V_2_4=y
+CT_LIBTOOL_VERSION="2.4.6"
+CT_COMP_TOOLS_m4=y
+## CT_COMP_TOOLS_M4=y
+# CT_M4_V_1_4_18 is not set
+# CT_M4_V_1_4_17 is not set
+CT_M4_V_1_4_13=y
+## CT_M4_V_1_4=y
+CT_M4_VERSION="1.4.13"
+CT_COMP_TOOLS_make=y
+## CT_COMP_TOOLS_MAKE=y
+CT_MAKE_V_4_2_1=y
+## CT_MAKE_V_4_2=y
+# CT_MAKE_V_4_1 is not set
+# CT_MAKE_V_4_0 is not set
+# CT_MAKE_V_3_81 is not set
+# CT_MAKE_GMAKE_SYMLINK is not set
+CT_MAKE_VERSION="4.2.1"
+
+#
+# Test suite
+#
+# CT_TEST_SUITE_GCC is not set
diff --git a/testing/upgrade/samples/v0-0002.config b/testing/upgrade/samples/v0-0002.config
new file mode 100644
index 0000000..cc10fdd
--- /dev/null
+++ b/testing/upgrade/samples/v0-0002.config
@@ -0,0 +1,703 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Crosstool-NG Configuration
+#
+CT_CONFIGURE_has_static_link=y
+CT_CONFIGURE_has_wget=y
+CT_CONFIGURE_has_stat_flavor_GNU=y
+CT_CONFIGURE_has_make_3_81_or_newer=y
+CT_CONFIGURE_has_libtool_2_4_or_newer=y
+CT_CONFIGURE_has_libtoolize_2_4_or_newer=y
+CT_CONFIGURE_has_autoconf_2_63_or_newer=y
+CT_CONFIGURE_has_autoreconf_2_63_or_newer=y
+CT_CONFIGURE_has_automake_1_15_or_newer=y
+CT_CONFIGURE_has_gnu_m4_1_4_12_or_newer=y
+CT_CONFIGURE_has_svn=y
+CT_CONFIGURE_has_git=y
+CT_MODULES=y
+
+#
+# Paths and misc options
+#
+
+#
+# crosstool-NG behavior
+#
+CT_OBSOLETE=y
+CT_EXPERIMENTAL=y
+# CT_ALLOW_BUILD_AS_ROOT is not set
+# CT_DEBUG_CT is not set
+
+#
+# Paths
+#
+CT_LOCAL_TARBALLS_DIR="${HOME}/src"
+CT_SAVE_TARBALLS=y
+CT_WORK_DIR="${CT_TOP_DIR}/.build"
+CT_BUILD_TOP_DIR="${CT_WORK_DIR}/${CT_HOST:+HOST-${CT_HOST}/}${CT_TARGET}"
+CT_PREFIX_DIR="${CT_PREFIX:-${HOME}/x-tools}/${CT_HOST:+HOST-${CT_HOST}/}${CT_TARGET}"
+CT_RM_RF_PREFIX_DIR=y
+CT_REMOVE_DOCS=y
+CT_PREFIX_DIR_RO=y
+CT_STRIP_HOST_TOOLCHAIN_EXECUTABLES=y
+# CT_STRIP_TARGET_TOOLCHAIN_EXECUTABLES is not set
+
+#
+# Downloading
+#
+CT_DOWNLOAD_AGENT_WGET=y
+# CT_DOWNLOAD_AGENT_NONE is not set
+# CT_FORBID_DOWNLOAD is not set
+# CT_FORCE_DOWNLOAD is not set
+CT_CONNECT_TIMEOUT=10
+CT_DOWNLOAD_WGET_OPTIONS="--passive-ftp --tries=3 -nc --progress=dot:binary"
+# CT_ONLY_DOWNLOAD is not set
+# CT_USE_MIRROR is not set
+
+#
+# Extracting
+#
+# CT_FORCE_EXTRACT is not set
+CT_OVERRIDE_CONFIG_GUESS_SUB=y
+# CT_ONLY_EXTRACT is not set
+CT_PATCH_BUNDLED=y
+# CT_PATCH_LOCAL is not set
+# CT_PATCH_BUNDLED_LOCAL is not set
+# CT_PATCH_LOCAL_BUNDLED is not set
+# CT_PATCH_BUNDLED_FALLBACK_LOCAL is not set
+# CT_PATCH_LOCAL_FALLBACK_BUNDLED is not set
+# CT_PATCH_NONE is not set
+CT_PATCH_ORDER="bundled"
+
+#
+# Build behavior
+#
+CT_PARALLEL_JOBS=0
+CT_LOAD=""
+CT_USE_PIPES=y
+CT_EXTRA_CFLAGS_FOR_BUILD=""
+CT_EXTRA_LDFLAGS_FOR_BUILD=""
+CT_EXTRA_CFLAGS_FOR_HOST=""
+CT_EXTRA_LDFLAGS_FOR_HOST=""
+# CT_CONFIG_SHELL_SH is not set
+# CT_CONFIG_SHELL_ASH is not set
+CT_CONFIG_SHELL_BASH=y
+# CT_CONFIG_SHELL_CUSTOM is not set
+CT_CONFIG_SHELL="${bash}"
+
+#
+# Logging
+#
+# CT_LOG_ERROR is not set
+# CT_LOG_WARN is not set
+# CT_LOG_INFO is not set
+CT_LOG_EXTRA=y
+# CT_LOG_ALL is not set
+# CT_LOG_DEBUG is not set
+CT_LOG_LEVEL_MAX="EXTRA"
+# CT_LOG_SEE_TOOLS_WARN is not set
+CT_LOG_PROGRESS_BAR=y
+CT_LOG_TO_FILE=y
+CT_LOG_FILE_COMPRESS=y
+
+#
+# Target options
+#
+CT_ARCH="arm"
+# CT_ARCH_alpha is not set
+CT_ARCH_arm=y
+## CT_ARCH_ARM=y
+# CT_ARCH_avr is not set
+# CT_ARCH_m68k is not set
+# CT_ARCH_microblaze is not set
+# CT_ARCH_mips is not set
+# CT_ARCH_nios2 is not set
+# CT_ARCH_powerpc is not set
+# CT_ARCH_s390 is not set
+# CT_ARCH_sh is not set
+# CT_ARCH_sparc is not set
+# CT_ARCH_x86 is not set
+# CT_ARCH_xtensa is not set
+CT_ARCH_alpha_AVAILABLE=y
+CT_ARCH_arm_AVAILABLE=y
+CT_ARCH_avr_AVAILABLE=y
+CT_ARCH_m68k_AVAILABLE=y
+CT_ARCH_microblaze_AVAILABLE=y
+CT_ARCH_mips_AVAILABLE=y
+CT_ARCH_nios2_AVAILABLE=y
+CT_ARCH_powerpc_AVAILABLE=y
+CT_ARCH_s390_AVAILABLE=y
+CT_ARCH_sh_AVAILABLE=y
+CT_ARCH_sparc_AVAILABLE=y
+CT_ARCH_x86_AVAILABLE=y
+CT_ARCH_xtensa_AVAILABLE=y
+CT_ARCH_SUFFIX=""
+
+#
+# Generic target options
+#
+# CT_MULTILIB is not set
+CT_DEMULTILIB=y
+CT_ARCH_SUPPORTS_BOTH_MMU=y
+CT_ARCH_DEFAULT_HAS_MMU=y
+# CT_ARCH_USE_MMU is not set
+CT_ARCH_SUPPORTS_BOTH_ENDIAN=y
+CT_ARCH_DEFAULT_LE=y
+# CT_ARCH_BE is not set
+CT_ARCH_LE=y
+CT_ARCH_ENDIAN="little"
+CT_ARCH_SUPPORTS_32=y
+CT_ARCH_SUPPORTS_64=y
+CT_ARCH_DEFAULT_32=y
+CT_ARCH_BITNESS=32
+CT_ARCH_32=y
+# CT_ARCH_64 is not set
+
+#
+# Target optimisations
+#
+CT_ARCH_SUPPORTS_WITH_ARCH=y
+CT_ARCH_SUPPORTS_WITH_CPU=y
+CT_ARCH_SUPPORTS_WITH_TUNE=y
+CT_ARCH_SUPPORTS_WITH_FLOAT=y
+CT_ARCH_SUPPORTS_WITH_FPU=y
+CT_ARCH_SUPPORTS_SOFTFP=y
+CT_ARCH_EXCLUSIVE_WITH_CPU=y
+CT_ARCH_ARCH=""
+CT_ARCH_CPU=""
+CT_ARCH_TUNE=""
+CT_ARCH_FPU=""
+CT_ARCH_FLOAT_AUTO=y
+# CT_ARCH_FLOAT_HW is not set
+# CT_ARCH_FLOAT_SOFTFP is not set
+# CT_ARCH_FLOAT_SW is not set
+CT_TARGET_CFLAGS=""
+CT_TARGET_LDFLAGS=""
+CT_ARCH_FLOAT="auto"
+
+#
+# arm other options
+#
+CT_ARCH_ARM_MODE="arm"
+CT_ARCH_ARM_MODE_ARM=y
+# CT_ARCH_ARM_MODE_THUMB is not set
+# CT_ARCH_ARM_INTERWORKING is not set
+CT_ARCH_ARM_EABI=y
+
+#
+# Toolchain options
+#
+
+#
+# General toolchain options
+#
+CT_WANTS_STATIC_LINK=y
+CT_WANTS_STATIC_LINK_CXX=y
+# CT_STATIC_TOOLCHAIN is not set
+CT_TOOLCHAIN_PKGVERSION=""
+CT_TOOLCHAIN_BUGURL=""
+
+#
+# Tuple completion and aliasing
+#
+CT_TARGET_VENDOR="unknown"
+CT_TARGET_ALIAS_SED_EXPR=""
+CT_TARGET_ALIAS=""
+
+#
+# Toolchain type
+#
+# CT_NATIVE is not set
+CT_CROSS=y
+# CT_CROSS_NATIVE is not set
+# CT_CANADIAN is not set
+CT_TOOLCHAIN_TYPE="cross"
+
+#
+# Build system
+#
+CT_BUILD=""
+CT_BUILD_PREFIX=""
+CT_BUILD_SUFFIX=""
+
+#
+# Misc options
+#
+# CT_TOOLCHAIN_ENABLE_NLS is not set
+
+#
+# Operating System
+#
+CT_BARE_METAL=y
+CT_KERNEL="bare-metal"
+CT_KERNEL_bare_metal=y
+## CT_KERNEL_BARE_METAL=y
+# CT_KERNEL_linux is not set
+CT_KERNEL_bare_metal_AVAILABLE=y
+CT_KERNEL_linux_AVAILABLE=y
+# CT_KERNEL_V_4_10 is not set
+# CT_KERNEL_V_4_9 is not set
+# CT_KERNEL_V_4_8 is not set
+# CT_KERNEL_V_4_7 is not set
+# CT_KERNEL_V_4_6 is not set
+# CT_KERNEL_V_4_5 is not set
+# CT_KERNEL_V_4_4 is not set
+# CT_KERNEL_V_4_3 is not set
+# CT_KERNEL_V_4_2 is not set
+# CT_KERNEL_V_4_1 is not set
+# CT_KERNEL_V_4_0 is not set
+# CT_KERNEL_V_3_19 is not set
+# CT_KERNEL_V_3_18 is not set
+# CT_KERNEL_V_3_17 is not set
+# CT_KERNEL_V_3_16 is not set
+# CT_KERNEL_V_3_15 is not set
+# CT_KERNEL_V_3_14 is not set
+# CT_KERNEL_V_3_13 is not set
+# CT_KERNEL_V_3_12 is not set
+# CT_KERNEL_V_3_11 is not set
+# CT_KERNEL_V_3_10 is not set
+# CT_KERNEL_V_3_9 is not set
+# CT_KERNEL_V_3_8 is not set
+# CT_KERNEL_V_3_7 is not set
+# CT_KERNEL_V_3_6 is not set
+# CT_KERNEL_V_3_5 is not set
+# CT_KERNEL_V_3_4 is not set
+# CT_KERNEL_V_3_3 is not set
+# CT_KERNEL_V_3_2 is not set
+# CT_KERNEL_V_3_1 is not set
+# CT_KERNEL_V_3_0 is not set
+# CT_KERNEL_V_2_6_39 is not set
+# CT_KERNEL_V_2_6_38 is not set
+# CT_KERNEL_V_2_6_37 is not set
+# CT_KERNEL_V_2_6_36 is not set
+# CT_KERNEL_V_2_6_35 is not set
+# CT_KERNEL_V_2_6_34 is not set
+# CT_KERNEL_V_2_6_33 is not set
+# CT_KERNEL_V_2_6_32 is not set
+CT_KERNEL_windows_AVAILABLE=y
+
+#
+# Common kernel options
+#
+# CT_KERNEL_LINUX_VERBOSITY_0 is not set
+# CT_KERNEL_LINUX_VERBOSITY_1 is not set
+# CT_KERNEL_LINUX_VERBOSITY_2 is not set
+
+#
+# Binary utilities
+#
+# CT_ARCH_BINFMT_ELF is not set
+CT_ARCH_BINFMT_FLAT=y
+# CT_ARCH_BINFMT_FDPIC is not set
+CT_BINUTILS="binutils"
+CT_BINUTILS_binutils=y
+
+#
+# GNU binutils
+#
+# CT_BINUTILS_CUSTOM is not set
+CT_BINUTILS_VERSION="2.25.1"
+# CT_BINUTILS_SHOW_LINARO is not set
+# CT_BINUTILS_V_2_28 is not set
+# CT_BINUTILS_V_2_27 is not set
+# CT_BINUTILS_V_2_26 is not set
+CT_BINUTILS_V_2_25_1=y
+## CT_BINUTILS_V_2_25=y
+# CT_BINUTILS_LINARO_V_2_25 is not set
+# CT_BINUTILS_LINARO_V_2_24 is not set
+# CT_BINUTILS_V_2_24 is not set
+# CT_BINUTILS_LINARO_V_2_23_2 is not set
+# CT_BINUTILS_V_2_23_2 is not set
+CT_BINUTILS_2_25_1_or_later=y
+CT_BINUTILS_2_25_or_later=y
+CT_BINUTILS_2_24_or_later=y
+CT_BINUTILS_2_23_2_or_later=y
+CT_BINUTILS_HAS_HASH_STYLE=y
+CT_BINUTILS_HAS_GOLD=y
+CT_BINUTILS_GOLD_SUPPORTS_ARCH=y
+CT_BINUTILS_GOLD_SUPPORT=y
+CT_BINUTILS_HAS_PLUGINS=y
+CT_BINUTILS_HAS_PKGVERSION_BUGURL=y
+CT_BINUTILS_FORCE_LD_BFD_ONLY=y
+CT_BINUTILS_LINKER_LD=y
+CT_BINUTILS_LINKERS_LIST="ld"
+CT_BINUTILS_LINKER_DEFAULT="bfd"
+CT_BINUTILS_PLUGINS=y
+CT_BINUTILS_EXTRA_CONFIG_ARRAY=""
+
+#
+# binutils other options
+#
+CT_ELF2FLT_REQUIRES=y
+
+#
+# elf2flt
+#
+CT_ELF2FLT_GIT=y
+# CT_ELF2FLT_CUSTOM is not set
+## CT_ELF2FLT_DEVEL_VCS_git=y
+CT_ELF2FLT_GIT_CSET="6d80ab6c93409e796f85da404bde84b841231531"
+## CT_ELF2FLT_DEVEL_REVISION="6d80ab6c93409e796f85da404bde84b841231531"
+CT_ELF2FLT_VERSION="6d80ab6c93409e796f85da404bde84b841231531"
+CT_ELF2FLT_EXTRA_CONFIG_ARRAY=""
+
+#
+# C-library
+#
+CT_LIBC="newlib"
+CT_LIBC_VERSION="linaro-2.2.0-2015.01"
+# CT_LIBC_musl is not set
+CT_LIBC_newlib=y
+## CT_LIBC_NEWLIB=y
+# CT_LIBC_none is not set
+# CT_LIBC_uClibc is not set
+CT_LIBC_avr_libc_AVAILABLE=y
+CT_LIBC_glibc_AVAILABLE=y
+CT_THREADS="none"
+CT_LIBC_mingw_AVAILABLE=y
+CT_LIBC_musl_AVAILABLE=y
+CT_LIBC_newlib_AVAILABLE=y
+# CT_LIBC_NEWLIB_CUSTOM is not set
+CT_CC_NEWLIB_SHOW_LINARO=y
+# CT_LIBC_NEWLIB_V_2_5_0 is not set
+# CT_LIBC_NEWLIB_V_2_4_0 is not set
+# CT_LIBC_NEWLIB_V_2_3_0 is not set
+CT_LIBC_NEWLIB_LINARO_V_2_2_0=y
+## CT_NEWLIB_LINARO_V_2_2=y
+# CT_LIBC_NEWLIB_V_2_2_0 is not set
+# CT_LIBC_NEWLIB_LINARO_V_2_1_0 is not set
+# CT_LIBC_NEWLIB_V_2_1_0 is not set
+# CT_LIBC_NEWLIB_V_2_0_0 is not set
+# CT_LIBC_NEWLIB_V_1_20_0 is not set
+# CT_LIBC_NEWLIB_V_1_19_0 is not set
+# CT_LIBC_NEWLIB_V_1_18_0 is not set
+# CT_LIBC_NEWLIB_V_1_17_0 is not set
+CT_LIBC_NEWLIB_2_2=y
+CT_LIBC_NEWLIB_2_2_or_later=y
+CT_LIBC_NEWLIB_2_1_or_later=y
+CT_LIBC_NEWLIB_2_0_or_later=y
+CT_LIBC_NEWLIB_TARGET_CFLAGS=""
+CT_LIBC_none_AVAILABLE=y
+CT_LIBC_uClibc_AVAILABLE=y
+# CT_LIBC_UCLIBC_CUSTOM_UCLIBC is not set
+# CT_LIBC_UCLIBC_CUSTOM_UCLIBC_NG is not set
+# CT_LIBC_UCLIBC_CUSTOM_UCLIBC_NG_OLD is not set
+# CT_LIBC_UCLIBC_VERBOSITY_0 is not set
+# CT_LIBC_UCLIBC_VERBOSITY_1 is not set
+# CT_LIBC_UCLIBC_VERBOSITY_2 is not set
+# CT_LIBC_UCLIBC_DEBUG_LEVEL_0 is not set
+# CT_LIBC_UCLIBC_DEBUG_LEVEL_1 is not set
+# CT_LIBC_UCLIBC_DEBUG_LEVEL_2 is not set
+# CT_LIBC_UCLIBC_DEBUG_LEVEL_3 is not set
+CT_LIBC_SUPPORT_THREADS_NONE=y
+CT_LIBC_PROVIDES_CXA_ATEXIT=y
+
+#
+# Common C library options
+#
+# CT_THREADS_NATIVE is not set
+# CT_THREADS_LT is not set
+CT_THREADS_NONE=y
+
+#
+# newlib other options
+#
+# CT_LIBC_NEWLIB_IO_C99FMT is not set
+# CT_LIBC_NEWLIB_IO_LL is not set
+# CT_LIBC_NEWLIB_IO_FLOAT is not set
+# CT_LIBC_NEWLIB_IO_POS_ARGS is not set
+CT_LIBC_NEWLIB_FVWRITE_IN_STREAMIO=y
+CT_LIBC_NEWLIB_UNBUF_STREAM_OPT=y
+CT_LIBC_NEWLIB_FSEEK_OPTIMIZATION=y
+# CT_LIBC_NEWLIB_DISABLE_SUPPLIED_SYSCALLS is not set
+# CT_LIBC_NEWLIB_REGISTER_FINI is not set
+CT_LIBC_NEWLIB_ATEXIT_DYNAMIC_ALLOC=y
+# CT_LIBC_NEWLIB_GLOBAL_ATEXIT is not set
+# CT_LIBC_NEWLIB_LITE_EXIT is not set
+# CT_LIBC_NEWLIB_REENT_SMALL is not set
+CT_LIBC_NEWLIB_MULTITHREAD=y
+# CT_LIBC_NEWLIB_EXTRA_SECTIONS is not set
+CT_LIBC_NEWLIB_WIDE_ORIENT=y
+CT_LIBC_NEWLIB_ENABLE_TARGET_OPTSPACE=y
+# CT_LIBC_NEWLIB_LTO is not set
+# CT_LIBC_NEWLIB_NANO_MALLOC is not set
+# CT_LIBC_NEWLIB_NANO_FORMATTED_IO is not set
+CT_LIBC_NEWLIB_EXTRA_CONFIG_ARRAY=""
+
+#
+# C compiler
+#
+CT_CC="gcc"
+CT_CC_CORE_PASS_2_NEEDED=y
+CT_CC_gcc=y
+# CT_CC_GCC_CUSTOM is not set
+CT_CC_GCC_VERSION="6.3.0"
+# CT_CC_GCC_SHOW_LINARO is not set
+# CT_CC_GCC_V_linaro_6_3 is not set
+CT_CC_GCC_V_6_3_0=y
+## CT_GCC_V_6=y
+# CT_CC_GCC_V_linaro_5_4 is not set
+# CT_CC_GCC_V_5_4_0 is not set
+# CT_CC_GCC_V_linaro_4_9 is not set
+# CT_CC_GCC_V_4_9_4 is not set
+# CT_CC_GCC_V_linaro_4_8 is not set
+# CT_CC_GCC_V_4_8_5 is not set
+CT_CC_GCC_4_8_or_later=y
+CT_CC_GCC_4_9_or_later=y
+CT_CC_GCC_5_or_later=y
+CT_CC_GCC_6=y
+CT_CC_GCC_6_or_later=y
+CT_CC_GCC_ENABLE_PLUGINS=y
+CT_CC_GCC_HAS_LIBMPX=y
+CT_CC_GCC_ENABLE_CXX_FLAGS=""
+CT_CC_GCC_CORE_EXTRA_CONFIG_ARRAY=""
+CT_CC_GCC_EXTRA_CONFIG_ARRAY=""
+# CT_CC_GCC_TARGET_FINAL is not set
+CT_CC_GCC_STATIC_LIBSTDCXX=y
+# CT_CC_GCC_SYSTEM_ZLIB is not set
+CT_CC_GCC_CONFIG_TLS=m
+
+#
+# Optimisation features
+#
+CT_CC_GCC_USE_GRAPHITE=y
+CT_CC_GCC_USE_LTO=y
+
+#
+# Settings for libraries running on target
+#
+CT_CC_GCC_ENABLE_TARGET_OPTSPACE=y
+# CT_CC_GCC_LIBMUDFLAP is not set
+# CT_CC_GCC_LIBSSP is not set
+# CT_CC_GCC_LIBQUADMATH is not set
+
+#
+# Misc. obscure options.
+#
+CT_CC_CXA_ATEXIT=y
+# CT_CC_GCC_DISABLE_PCH is not set
+CT_CC_GCC_LDBL_128=m
+# CT_CC_GCC_BUILD_ID is not set
+CT_CC_GCC_LNK_HASH_STYLE_DEFAULT=y
+# CT_CC_GCC_LNK_HASH_STYLE_SYSV is not set
+# CT_CC_GCC_LNK_HASH_STYLE_GNU is not set
+# CT_CC_GCC_LNK_HASH_STYLE_BOTH is not set
+CT_CC_GCC_LNK_HASH_STYLE=""
+CT_CC_GCC_DEC_FLOAT_AUTO=y
+# CT_CC_GCC_DEC_FLOAT_BID is not set
+# CT_CC_GCC_DEC_FLOAT_DPD is not set
+# CT_CC_GCC_DEC_FLOATS_NO is not set
+CT_CC_SUPPORT_CXX=y
+CT_CC_SUPPORT_FORTRAN=y
+CT_CC_SUPPORT_JAVA=y
+CT_CC_SUPPORT_ADA=y
+CT_CC_SUPPORT_OBJC=y
+CT_CC_SUPPORT_OBJCXX=y
+CT_CC_SUPPORT_GOLANG=y
+
+#
+# Additional supported languages:
+#
+CT_CC_LANG_CXX=y
+# CT_CC_LANG_FORTRAN is not set
+CT_CC_LANG_OTHERS=""
+
+#
+# Debug facilities
+#
+CT_DEBUG_gdb=y
+CT_GDB_CROSS=y
+# CT_GDB_CROSS_STATIC is not set
+# CT_GDB_CROSS_SIM is not set
+CT_GDB_CROSS_PYTHON=y
+CT_GDB_CROSS_PYTHON_BINARY=""
+CT_GDB_CROSS_EXTRA_CONFIG_ARRAY=""
+
+#
+# In bare-metal, you'll need to   
+#
+
+#
+# provide your own gdbserver stub.
+#
+
+#
+# gdb version
+#
+# CT_GDB_CUSTOM is not set
+CT_GDB_VERSION="7.0.1a"
+# CT_DEBUG_GDB_SHOW_LINARO is not set
+# CT_GDB_V_7_12_1 is not set
+# CT_GDB_V_7_11_1 is not set
+# CT_GDB_V_7_10_1 is not set
+# CT_GDB_V_7_10 is not set
+# CT_GDB_V_7_9_1 is not set
+# CT_GDB_V_7_9 is not set
+# CT_GDB_V_linaro_7_8 is not set
+# CT_GDB_V_7_8_2 is not set
+# CT_GDB_V_7_8_1 is not set
+# CT_GDB_V_7_8 is not set
+# CT_GDB_V_linaro_7_7_1 is not set
+# CT_GDB_V_7_7_1 is not set
+# CT_GDB_V_linaro_7_7 is not set
+# CT_GDB_V_7_7 is not set
+# CT_GDB_V_linaro_7_6 is not set
+# CT_GDB_V_7_6_1 is not set
+# CT_GDB_V_linaro_7_5 is not set
+# CT_GDB_V_7_5_1 is not set
+# CT_GDB_V_linaro_7_4 is not set
+# CT_GDB_V_7_4_1 is not set
+# CT_GDB_V_7_4 is not set
+# CT_GDB_V_linaro_7_3 is not set
+# CT_GDB_V_7_3_1 is not set
+# CT_GDB_V_7_3a is not set
+# CT_GDB_V_7_2a is not set
+# CT_GDB_V_7_1a is not set
+CT_GDB_V_7_0_1a=y
+## CT_GDB_V_7_0=y
+# CT_GDB_V_7_0a is not set
+# CT_GDB_V_6_8a is not set
+CT_GDB_7_0_or_later=y
+CT_GDB_HAS_PKGVERSION_BUGURL=y
+CT_GDB_HAS_PYTHON=y
+CT_GDB_INSTALL_GDBINIT=y
+# CT_DEBUG_ltrace is not set
+# CT_DEBUG_strace is not set
+# CT_STRACE_V_4_16 is not set
+# CT_STRACE_V_4_15 is not set
+# CT_STRACE_V_4_14 is not set
+# CT_STRACE_V_4_13 is not set
+# CT_STRACE_V_4_12 is not set
+# CT_STRACE_V_4_11 is not set
+# CT_STRACE_V_4_10 is not set
+# CT_STRACE_V_4_9 is not set
+# CT_STRACE_V_4_8 is not set
+# CT_STRACE_V_4_7 is not set
+# CT_STRACE_V_4_6 is not set
+# CT_STRACE_V_4_5_20 is not set
+# CT_STRACE_V_4_5_19 is not set
+# CT_STRACE_V_4_5_18 is not set
+
+#
+# Companion libraries
+#
+CT_COMPLIBS_NEEDED=y
+CT_LIBICONV_NEEDED=y
+CT_GMP_NEEDED=y
+CT_MPFR_NEEDED=y
+CT_ISL_NEEDED=y
+CT_MPC_NEEDED=y
+CT_EXPAT_NEEDED=y
+CT_NCURSES_NEEDED=y
+CT_COMPLIBS=y
+CT_LIBICONV=y
+CT_GETTEXT=y
+CT_GMP=y
+CT_MPFR=y
+CT_ISL=y
+CT_MPC=y
+CT_EXPAT=y
+CT_NCURSES=y
+CT_ZLIB=y
+CT_ZLIB_V_1_2_11=y
+CT_ZLIB_VERSION="1.2.11"
+CT_LIBICONV_V_1_15=y
+# CT_LIBICONV_V_1_14 is not set
+CT_LIBICONV_VERSION="1.15"
+CT_GETTEXT_V_0_19_8_1=y
+# CT_GETTEXT_V_0_19_7 is not set
+CT_GETTEXT_VERSION="0.19.8.1"
+# CT_GMP_V_6_1_2 is not set
+# CT_GMP_V_6_1_0 is not set
+# CT_GMP_V_6_0_0 is not set
+# CT_GMP_V_5_1_3 is not set
+# CT_GMP_V_5_1_1 is not set
+# CT_GMP_V_5_0_2 is not set
+CT_GMP_V_5_0_1=y
+## CT_GMP_V_5_0=y
+# CT_GMP_V_4_3_2 is not set
+# CT_GMP_V_4_3_1 is not set
+# CT_GMP_V_4_3_0 is not set
+CT_GMP_VERSION="5.0.1"
+CT_MPFR_V_3_1_5=y
+## CT_MPFR_V_3_1=y
+# CT_MPFR_V_3_1_3 is not set
+# CT_MPFR_V_3_1_2 is not set
+# CT_MPFR_V_3_1_0 is not set
+# CT_MPFR_V_3_0_1 is not set
+# CT_MPFR_V_3_0_0 is not set
+# CT_MPFR_V_2_4_2 is not set
+# CT_MPFR_V_2_4_1 is not set
+# CT_MPFR_V_2_4_0 is not set
+CT_MPFR_VERSION="3.1.5"
+CT_ISL_V_0_18=y
+# CT_ISL_V_0_17_1 is not set
+# CT_ISL_V_0_16_1 is not set
+# CT_ISL_V_0_15 is not set
+# CT_ISL_V_0_14 is not set
+# CT_ISL_V_0_12_2 is not set
+# CT_ISL_V_0_11_1 is not set
+CT_ISL_V_0_16_or_later=y
+CT_ISL_V_0_15_or_later=y
+CT_ISL_V_0_14_or_later=y
+CT_ISL_V_0_12_or_later=y
+CT_ISL_VERSION="0.18"
+# CT_CLOOG_V_0_18_1 is not set
+# CT_CLOOG_V_0_18_0 is not set
+# CT_MPC_V_1_0_3 is not set
+CT_MPC_V_1_0_2=y
+## CT_MPC_V_1_0=y
+# CT_MPC_V_1_0_1 is not set
+# CT_MPC_V_1_0 is not set
+# CT_MPC_V_0_9 is not set
+# CT_MPC_V_0_8_2 is not set
+# CT_MPC_V_0_8_1 is not set
+# CT_MPC_V_0_7 is not set
+CT_MPC_VERSION="1.0.2"
+# CT_EXPAT_V_2_2_0 is not set
+CT_EXPAT_V_2_1_1=y
+## CT_EXPAT_V_2_1=y
+CT_EXPAT_VERSION="2.1.1"
+CT_NCURSES_V_6_0=y
+CT_NCURSES_VERSION="6.0"
+# CT_NCURSES_NEW_ABI is not set
+CT_NCURSES_HOST_CONFIG_ARGS=""
+CT_NCURSES_HOST_DISABLE_DB=y
+CT_NCURSES_HOST_FALLBACKS="linux,xterm,xterm-color,xterm-256color,vt100"
+CT_NCURSES_TARGET_CONFIG_ARGS=""
+# CT_NCURSES_TARGET_DISABLE_DB is not set
+CT_NCURSES_TARGET_FALLBACKS=""
+
+#
+# Companion libraries common options
+#
+# CT_COMPLIBS_CHECK is not set
+
+#
+# Companion tools
+#
+# CT_COMP_TOOLS_FOR_HOST is not set
+# CT_COMP_TOOLS_autoconf is not set
+# CT_AUTOCONF_V_2_69 is not set
+# CT_AUTOCONF_V_2_65 is not set
+# CT_COMP_TOOLS_automake is not set
+# CT_AUTOMAKE_V_1_15 is not set
+# CT_AUTOMAKE_V_1_14 is not set
+# CT_AUTOMAKE_V_1_11_6 is not set
+# CT_AUTOMAKE_V_1_11_1 is not set
+# CT_COMP_TOOLS_libtool is not set
+# CT_LIBTOOL_V_2_4_6 is not set
+# CT_COMP_TOOLS_m4 is not set
+# CT_M4_V_1_4_18 is not set
+# CT_M4_V_1_4_17 is not set
+# CT_M4_V_1_4_13 is not set
+# CT_COMP_TOOLS_make is not set
+# CT_MAKE_V_4_2_1 is not set
+# CT_MAKE_V_4_1 is not set
+# CT_MAKE_V_4_0 is not set
+# CT_MAKE_V_3_81 is not set
+
+#
+# Test suite
+#
+# CT_TEST_SUITE_GCC is not set
diff --git a/testing/upgrade/samples/v0-0003.config b/testing/upgrade/samples/v0-0003.config
new file mode 100644
index 0000000..7bf39f2
--- /dev/null
+++ b/testing/upgrade/samples/v0-0003.config
@@ -0,0 +1,467 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Crosstool-NG Configuration
+#
+CT_CONFIGURE_has_static_link=y
+CT_CONFIGURE_has_wget=y
+CT_CONFIGURE_has_stat_flavor_GNU=y
+CT_CONFIGURE_has_make_3_81_or_newer=y
+CT_CONFIGURE_has_libtool_2_4_or_newer=y
+CT_CONFIGURE_has_libtoolize_2_4_or_newer=y
+CT_CONFIGURE_has_autoconf_2_63_or_newer=y
+CT_CONFIGURE_has_autoreconf_2_63_or_newer=y
+CT_CONFIGURE_has_automake_1_15_or_newer=y
+CT_CONFIGURE_has_gnu_m4_1_4_12_or_newer=y
+CT_CONFIGURE_has_svn=y
+CT_CONFIGURE_has_git=y
+CT_MODULES=y
+
+#
+# Paths and misc options
+#
+
+#
+# crosstool-NG behavior
+#
+# CT_OBSOLETE is not set
+# CT_EXPERIMENTAL is not set
+# CT_DEBUG_CT is not set
+
+#
+# Paths
+#
+CT_LOCAL_TARBALLS_DIR="${HOME}/src"
+CT_SAVE_TARBALLS=y
+CT_WORK_DIR="${CT_TOP_DIR}/.build"
+CT_BUILD_TOP_DIR="${CT_WORK_DIR}/${CT_HOST:+HOST-${CT_HOST}/}${CT_TARGET}"
+CT_PREFIX_DIR="${CT_PREFIX:-${HOME}/x-tools}/${CT_HOST:+HOST-${CT_HOST}/}${CT_TARGET}"
+CT_RM_RF_PREFIX_DIR=y
+CT_REMOVE_DOCS=y
+CT_PREFIX_DIR_RO=y
+CT_STRIP_HOST_TOOLCHAIN_EXECUTABLES=y
+# CT_STRIP_TARGET_TOOLCHAIN_EXECUTABLES is not set
+
+#
+# Downloading
+#
+CT_DOWNLOAD_AGENT_WGET=y
+# CT_DOWNLOAD_AGENT_NONE is not set
+# CT_FORBID_DOWNLOAD is not set
+# CT_FORCE_DOWNLOAD is not set
+CT_CONNECT_TIMEOUT=10
+CT_DOWNLOAD_WGET_OPTIONS="--passive-ftp --tries=3 -nc --progress=dot:binary"
+# CT_ONLY_DOWNLOAD is not set
+# CT_USE_MIRROR is not set
+
+#
+# Extracting
+#
+# CT_FORCE_EXTRACT is not set
+CT_OVERRIDE_CONFIG_GUESS_SUB=y
+# CT_ONLY_EXTRACT is not set
+CT_PATCH_BUNDLED=y
+# CT_PATCH_LOCAL is not set
+# CT_PATCH_BUNDLED_LOCAL is not set
+# CT_PATCH_LOCAL_BUNDLED is not set
+# CT_PATCH_BUNDLED_FALLBACK_LOCAL is not set
+# CT_PATCH_LOCAL_FALLBACK_BUNDLED is not set
+# CT_PATCH_NONE is not set
+CT_PATCH_ORDER="bundled"
+
+#
+# Build behavior
+#
+CT_PARALLEL_JOBS=0
+CT_LOAD=""
+CT_USE_PIPES=y
+CT_EXTRA_CFLAGS_FOR_BUILD=""
+CT_EXTRA_LDFLAGS_FOR_BUILD=""
+CT_EXTRA_CFLAGS_FOR_HOST=""
+CT_EXTRA_LDFLAGS_FOR_HOST=""
+# CT_CONFIG_SHELL_SH is not set
+# CT_CONFIG_SHELL_ASH is not set
+CT_CONFIG_SHELL_BASH=y
+# CT_CONFIG_SHELL_CUSTOM is not set
+CT_CONFIG_SHELL="${bash}"
+
+#
+# Logging
+#
+# CT_LOG_ERROR is not set
+# CT_LOG_WARN is not set
+# CT_LOG_INFO is not set
+CT_LOG_EXTRA=y
+# CT_LOG_ALL is not set
+# CT_LOG_DEBUG is not set
+CT_LOG_LEVEL_MAX="EXTRA"
+# CT_LOG_SEE_TOOLS_WARN is not set
+CT_LOG_PROGRESS_BAR=y
+CT_LOG_TO_FILE=y
+CT_LOG_FILE_COMPRESS=y
+
+#
+# Target options
+#
+CT_ARCH="xtensa"
+# CT_ARCH_alpha is not set
+# CT_ARCH_arm is not set
+# CT_ARCH_avr is not set
+# CT_ARCH_m68k is not set
+# CT_ARCH_mips is not set
+# CT_ARCH_nios2 is not set
+# CT_ARCH_powerpc is not set
+# CT_ARCH_s390 is not set
+# CT_ARCH_sh is not set
+# CT_ARCH_sparc is not set
+# CT_ARCH_x86 is not set
+CT_ARCH_xtensa=y
+## CT_ARCH_XTENSA=y
+CT_ARCH_alpha_AVAILABLE=y
+CT_ARCH_arm_AVAILABLE=y
+CT_ARCH_avr_AVAILABLE=y
+CT_ARCH_m68k_AVAILABLE=y
+CT_ARCH_microblaze_AVAILABLE=y
+CT_ARCH_mips_AVAILABLE=y
+CT_ARCH_nios2_AVAILABLE=y
+CT_ARCH_powerpc_AVAILABLE=y
+CT_ARCH_s390_AVAILABLE=y
+CT_ARCH_sh_AVAILABLE=y
+CT_ARCH_sparc_AVAILABLE=y
+CT_ARCH_x86_AVAILABLE=y
+CT_ARCH_xtensa_AVAILABLE=y
+CT_ARCH_SUFFIX=""
+
+#
+# Generic target options
+#
+# CT_MULTILIB is not set
+CT_DEMULTILIB=y
+CT_ARCH_SUPPORTS_BOTH_MMU=y
+CT_ARCH_DEFAULT_HAS_MMU=y
+CT_ARCH_USE_MMU=y
+CT_ARCH_SUPPORTS_BOTH_ENDIAN=y
+CT_ARCH_DEFAULT_LE=y
+CT_ARCH_BE=y
+# CT_ARCH_LE is not set
+CT_ARCH_ENDIAN="big"
+CT_ARCH_SUPPORTS_32=y
+CT_ARCH_BITNESS=32
+CT_ARCH_32=y
+
+#
+# Target optimisations
+#
+CT_TARGET_CFLAGS="-mlongcalls -mtext-section-literals"
+CT_TARGET_LDFLAGS=""
+CT_ARCH_FLOAT=""
+
+#
+# xtensa other options
+#
+CT_XTENSA_CUSTOM=y
+# CT_ARCH_xtensa_fsf is not set
+CT_ARCH_XTENSA_CUSTOM_NAME="myxtensa"
+## CT_OVERLAY_NAME="myxtensa"
+CT_ARCH_XTENSA_CUSTOM_OVERLAY_LOCATION="/foo/override.tgz"
+## CT_OVERLAY_LOCATION="/foo/override.tgz"
+
+#
+# Toolchain options
+#
+
+#
+# General toolchain options
+#
+CT_WANTS_STATIC_LINK=y
+CT_WANTS_STATIC_LINK_CXX=y
+# CT_STATIC_TOOLCHAIN is not set
+CT_TOOLCHAIN_PKGVERSION=""
+CT_TOOLCHAIN_BUGURL=""
+
+#
+# Tuple completion and aliasing
+#
+CT_TARGET_VENDOR="fsf"
+CT_TARGET_ALIAS_SED_EXPR=""
+CT_TARGET_ALIAS=""
+
+#
+# Toolchain type
+#
+CT_CROSS=y
+# CT_CANADIAN is not set
+CT_TOOLCHAIN_TYPE="cross"
+
+#
+# Build system
+#
+CT_BUILD=""
+CT_BUILD_PREFIX=""
+CT_BUILD_SUFFIX=""
+
+#
+# Misc options
+#
+# CT_TOOLCHAIN_ENABLE_NLS is not set
+
+#
+# Operating System
+#
+CT_BARE_METAL=y
+CT_KERNEL="bare-metal"
+CT_KERNEL_bare_metal=y
+# CT_KERNEL_linux is not set
+CT_KERNEL_bare_metal_AVAILABLE=y
+CT_KERNEL_linux_AVAILABLE=y
+# CT_KERNEL_V_4_10 is not set
+# CT_KERNEL_V_4_9 is not set
+# CT_KERNEL_V_4_4 is not set
+# CT_KERNEL_V_4_1 is not set
+# CT_KERNEL_V_3_16 is not set
+# CT_KERNEL_V_3_12 is not set
+# CT_KERNEL_V_3_10 is not set
+# CT_KERNEL_V_3_4 is not set
+# CT_KERNEL_V_3_2 is not set
+CT_KERNEL_windows_AVAILABLE=y
+
+#
+# Common kernel options
+#
+# CT_KERNEL_LINUX_VERBOSITY_0 is not set
+# CT_KERNEL_LINUX_VERBOSITY_1 is not set
+# CT_KERNEL_LINUX_VERBOSITY_2 is not set
+
+#
+# Binary utilities
+#
+CT_ARCH_BINFMT_ELF=y
+CT_BINUTILS="binutils"
+CT_BINUTILS_binutils=y
+
+#
+# GNU binutils
+#
+CT_BINUTILS_VERSION="2.28"
+# CT_BINUTILS_SHOW_LINARO is not set
+CT_BINUTILS_V_2_28=y
+## CT_BINUTILS_V_2_28=y
+# CT_BINUTILS_V_2_27 is not set
+# CT_BINUTILS_V_2_26 is not set
+CT_BINUTILS_2_27_or_later=y
+CT_BINUTILS_2_26_or_later=y
+CT_BINUTILS_2_25_1_or_later=y
+CT_BINUTILS_2_25_or_later=y
+CT_BINUTILS_2_24_or_later=y
+CT_BINUTILS_2_23_2_or_later=y
+CT_BINUTILS_HAS_HASH_STYLE=y
+CT_BINUTILS_HAS_GOLD=y
+CT_BINUTILS_HAS_PLUGINS=y
+CT_BINUTILS_HAS_PKGVERSION_BUGURL=y
+CT_BINUTILS_LINKER_LD=y
+CT_BINUTILS_LINKERS_LIST="ld"
+CT_BINUTILS_LINKER_DEFAULT="bfd"
+# CT_BINUTILS_PLUGINS is not set
+CT_BINUTILS_EXTRA_CONFIG_ARRAY=""
+
+#
+# binutils other options
+#
+
+#
+# C-library
+#
+CT_LIBC="none"
+# CT_LIBC_glibc is not set
+# CT_LIBC_newlib is not set
+CT_LIBC_none=y
+## CT_LIBC_NONE=y
+# CT_LIBC_uClibc is not set
+CT_LIBC_avr_libc_AVAILABLE=y
+CT_LIBC_glibc_AVAILABLE=y
+CT_THREADS="none"
+CT_LIBC_mingw_AVAILABLE=y
+CT_LIBC_musl_AVAILABLE=y
+CT_LIBC_newlib_AVAILABLE=y
+# CT_LIBC_NEWLIB_V_2_5_0 is not set
+# CT_LIBC_NEWLIB_V_2_4_0 is not set
+# CT_LIBC_NEWLIB_V_2_3_0 is not set
+# CT_LIBC_NEWLIB_V_2_2_0 is not set
+# CT_LIBC_NEWLIB_V_2_1_0 is not set
+# CT_LIBC_NEWLIB_V_2_0_0 is not set
+# CT_LIBC_NEWLIB_V_1_20_0 is not set
+# CT_LIBC_NEWLIB_V_1_19_0 is not set
+# CT_LIBC_NEWLIB_V_1_18_0 is not set
+# CT_LIBC_NEWLIB_V_1_17_0 is not set
+CT_LIBC_none_AVAILABLE=y
+CT_LIBC_uClibc_AVAILABLE=y
+# CT_LIBC_UCLIBC_NG_V_1_0_22 is not set
+# CT_LIBC_UCLIBC_VERBOSITY_0 is not set
+# CT_LIBC_UCLIBC_VERBOSITY_1 is not set
+# CT_LIBC_UCLIBC_VERBOSITY_2 is not set
+# CT_LIBC_UCLIBC_DEBUG_LEVEL_0 is not set
+# CT_LIBC_UCLIBC_DEBUG_LEVEL_1 is not set
+# CT_LIBC_UCLIBC_DEBUG_LEVEL_2 is not set
+# CT_LIBC_UCLIBC_DEBUG_LEVEL_3 is not set
+# CT_THREADS_NATIVE is not set
+# CT_THREADS_LT is not set
+# CT_THREADS_NONE is not set
+
+#
+# C compiler
+#
+CT_CC="gcc"
+CT_CC_gcc=y
+CT_CC_GCC_VERSION="6.3.0"
+# CT_CC_GCC_SHOW_LINARO is not set
+CT_CC_GCC_V_6_3_0=y
+# CT_CC_GCC_V_5_4_0 is not set
+# CT_CC_GCC_V_4_9_4 is not set
+CT_CC_GCC_4_8_or_later=y
+CT_CC_GCC_4_9_or_later=y
+CT_CC_GCC_5_or_later=y
+CT_CC_GCC_6=y
+CT_CC_GCC_6_or_later=y
+CT_CC_GCC_HAS_LIBMPX=y
+CT_CC_GCC_ENABLE_CXX_FLAGS=""
+CT_CC_GCC_EXTRA_CONFIG_ARRAY=""
+# CT_CC_GCC_TARGET_FINAL is not set
+CT_CC_GCC_STATIC_LIBSTDCXX=y
+# CT_CC_GCC_SYSTEM_ZLIB is not set
+CT_CC_GCC_CONFIG_TLS=m
+
+#
+# Optimisation features
+#
+CT_CC_GCC_USE_GRAPHITE=y
+CT_CC_GCC_USE_LTO=y
+
+#
+# Settings for libraries running on target
+#
+CT_CC_GCC_ENABLE_TARGET_OPTSPACE=y
+# CT_CC_GCC_LIBMUDFLAP is not set
+# CT_CC_GCC_LIBGOMP is not set
+# CT_CC_GCC_LIBSSP is not set
+# CT_CC_GCC_LIBQUADMATH is not set
+
+#
+# Misc. obscure options.
+#
+# CT_CC_GCC_DISABLE_PCH is not set
+CT_CC_GCC_LDBL_128=m
+# CT_CC_GCC_BUILD_ID is not set
+CT_CC_GCC_LNK_HASH_STYLE_DEFAULT=y
+# CT_CC_GCC_LNK_HASH_STYLE_SYSV is not set
+# CT_CC_GCC_LNK_HASH_STYLE_GNU is not set
+# CT_CC_GCC_LNK_HASH_STYLE_BOTH is not set
+CT_CC_GCC_LNK_HASH_STYLE=""
+CT_CC_GCC_DEC_FLOAT_AUTO=y
+# CT_CC_GCC_DEC_FLOAT_BID is not set
+# CT_CC_GCC_DEC_FLOAT_DPD is not set
+# CT_CC_GCC_DEC_FLOATS_NO is not set
+CT_CC_SUPPORT_FORTRAN=y
+CT_CC_SUPPORT_JAVA=y
+CT_CC_SUPPORT_ADA=y
+CT_CC_SUPPORT_OBJC=y
+CT_CC_SUPPORT_OBJCXX=y
+CT_CC_SUPPORT_GOLANG=y
+
+#
+# Additional supported languages:
+#
+# CT_CC_LANG_FORTRAN is not set
+
+#
+# Debug facilities
+#
+CT_DEBUG_gdb=y
+CT_GDB_CROSS=y
+# CT_GDB_CROSS_STATIC is not set
+# CT_GDB_CROSS_SIM is not set
+CT_GDB_CROSS_PYTHON=y
+CT_GDB_CROSS_PYTHON_BINARY=""
+CT_GDB_CROSS_EXTRA_CONFIG_ARRAY=""
+
+#
+# In bare-metal, you'll need to   
+#
+
+#
+# provide your own gdbserver stub.
+#
+
+#
+# gdb version
+#
+CT_GDB_VERSION="7.11.1"
+# CT_GDB_V_7_12_1 is not set
+CT_GDB_V_7_11_1=y
+## CT_GDB_V_7_11=y
+CT_GDB_7_2_or_later=y
+CT_GDB_7_0_or_later=y
+CT_GDB_HAS_PKGVERSION_BUGURL=y
+CT_GDB_HAS_PYTHON=y
+CT_GDB_INSTALL_GDBINIT=y
+# CT_DEBUG_ltrace is not set
+# CT_DEBUG_strace is not set
+
+#
+# Companion libraries
+#
+CT_COMPLIBS_NEEDED=y
+CT_GMP_NEEDED=y
+CT_MPFR_NEEDED=y
+CT_ISL_NEEDED=y
+CT_MPC_NEEDED=y
+CT_EXPAT_NEEDED=y
+CT_NCURSES_NEEDED=y
+CT_COMPLIBS=y
+# CT_LIBICONV is not set
+# CT_GETTEXT is not set
+CT_GMP=y
+CT_MPFR=y
+CT_ISL=y
+CT_MPC=y
+CT_EXPAT=y
+CT_NCURSES=y
+# CT_ZLIB is not set
+CT_GMP_V_6_1_2=y
+CT_GMP_5_0_2_or_later=y
+CT_GMP_VERSION="6.1.2"
+CT_MPFR_V_3_1_5=y
+CT_MPFR_VERSION="3.1.5"
+CT_ISL_V_0_16_1=y
+# CT_ISL_V_0_15 is not set
+CT_ISL_V_0_16_or_later=y
+CT_ISL_V_0_15_or_later=y
+CT_ISL_V_0_14_or_later=y
+CT_ISL_V_0_12_or_later=y
+CT_ISL_VERSION="0.16.1"
+## CT_ISL_V_0_16=y
+CT_MPC_V_1_0_3=y
+CT_MPC_VERSION="1.0.3"
+CT_EXPAT_V_2_2_0=y
+CT_EXPAT_VERSION="2.2.0"
+CT_NCURSES_V_6_0=y
+CT_NCURSES_VERSION="6.0"
+CT_NCURSES_HOST_CONFIG_ARGS=""
+CT_NCURSES_HOST_DISABLE_DB=y
+CT_NCURSES_HOST_FALLBACKS="linux,xterm,xterm-color,xterm-256color,vt100"
+CT_NCURSES_TARGET_CONFIG_ARGS=""
+# CT_NCURSES_TARGET_DISABLE_DB is not set
+CT_NCURSES_TARGET_FALLBACKS=""
+
+#
+# Companion libraries common options
+#
+# CT_COMPLIBS_CHECK is not set
+
+#
+# Companion tools
+#
+# CT_COMP_TOOLS_FOR_HOST is not set
+# CT_COMP_TOOLS_autoconf is not set
+# CT_COMP_TOOLS_automake is not set
+# CT_COMP_TOOLS_libtool is not set
+# CT_COMP_TOOLS_m4 is not set
+# CT_COMP_TOOLS_make is not set
diff --git a/testing/upgrade/samples/v0-0004.config b/testing/upgrade/samples/v0-0004.config
new file mode 100644
index 0000000..a37724a
--- /dev/null
+++ b/testing/upgrade/samples/v0-0004.config
@@ -0,0 +1,438 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Crosstool-NG Configuration
+#
+CT_CONFIGURE_has_static_link=y
+CT_CONFIGURE_has_wget=y
+CT_CONFIGURE_has_stat_flavor_GNU=y
+CT_CONFIGURE_has_make_3_81_or_newer=y
+CT_CONFIGURE_has_libtool_2_4_or_newer=y
+CT_CONFIGURE_has_libtoolize_2_4_or_newer=y
+CT_CONFIGURE_has_autoconf_2_63_or_newer=y
+CT_CONFIGURE_has_autoreconf_2_63_or_newer=y
+CT_CONFIGURE_has_automake_1_15_or_newer=y
+CT_CONFIGURE_has_gnu_m4_1_4_12_or_newer=y
+CT_CONFIGURE_has_svn=y
+CT_CONFIGURE_has_git=y
+CT_MODULES=y
+
+#
+# Paths and misc options
+#
+
+#
+# crosstool-NG behavior
+#
+# CT_OBSOLETE is not set
+CT_EXPERIMENTAL=y
+# CT_ALLOW_BUILD_AS_ROOT is not set
+# CT_DEBUG_CT is not set
+
+#
+# Paths
+#
+CT_LOCAL_TARBALLS_DIR="${HOME}/src"
+CT_SAVE_TARBALLS=y
+CT_WORK_DIR="${CT_TOP_DIR}/.build"
+CT_BUILD_TOP_DIR="${CT_WORK_DIR}/${CT_HOST:+HOST-${CT_HOST}/}${CT_TARGET}"
+CT_PREFIX_DIR="${CT_PREFIX:-${HOME}/x-tools}/${CT_HOST:+HOST-${CT_HOST}/}${CT_TARGET}"
+CT_RM_RF_PREFIX_DIR=y
+CT_REMOVE_DOCS=y
+CT_PREFIX_DIR_RO=y
+CT_STRIP_HOST_TOOLCHAIN_EXECUTABLES=y
+# CT_STRIP_TARGET_TOOLCHAIN_EXECUTABLES is not set
+
+#
+# Downloading
+#
+CT_DOWNLOAD_AGENT_WGET=y
+# CT_DOWNLOAD_AGENT_NONE is not set
+# CT_FORBID_DOWNLOAD is not set
+# CT_FORCE_DOWNLOAD is not set
+CT_CONNECT_TIMEOUT=10
+CT_DOWNLOAD_WGET_OPTIONS="--passive-ftp --tries=3 -nc --progress=dot:binary"
+# CT_ONLY_DOWNLOAD is not set
+# CT_USE_MIRROR is not set
+
+#
+# Extracting
+#
+# CT_FORCE_EXTRACT is not set
+CT_OVERRIDE_CONFIG_GUESS_SUB=y
+# CT_ONLY_EXTRACT is not set
+CT_PATCH_BUNDLED=y
+# CT_PATCH_LOCAL is not set
+# CT_PATCH_BUNDLED_LOCAL is not set
+# CT_PATCH_LOCAL_BUNDLED is not set
+# CT_PATCH_BUNDLED_FALLBACK_LOCAL is not set
+# CT_PATCH_LOCAL_FALLBACK_BUNDLED is not set
+# CT_PATCH_NONE is not set
+CT_PATCH_ORDER="bundled"
+
+#
+# Build behavior
+#
+CT_PARALLEL_JOBS=0
+CT_LOAD=""
+CT_USE_PIPES=y
+CT_EXTRA_CFLAGS_FOR_BUILD=""
+CT_EXTRA_LDFLAGS_FOR_BUILD=""
+CT_EXTRA_CFLAGS_FOR_HOST=""
+CT_EXTRA_LDFLAGS_FOR_HOST=""
+# CT_CONFIG_SHELL_SH is not set
+# CT_CONFIG_SHELL_ASH is not set
+CT_CONFIG_SHELL_BASH=y
+# CT_CONFIG_SHELL_CUSTOM is not set
+CT_CONFIG_SHELL="${bash}"
+
+#
+# Logging
+#
+# CT_LOG_ERROR is not set
+# CT_LOG_WARN is not set
+# CT_LOG_INFO is not set
+CT_LOG_EXTRA=y
+# CT_LOG_ALL is not set
+# CT_LOG_DEBUG is not set
+CT_LOG_LEVEL_MAX="EXTRA"
+# CT_LOG_SEE_TOOLS_WARN is not set
+CT_LOG_PROGRESS_BAR=y
+CT_LOG_TO_FILE=y
+CT_LOG_FILE_COMPRESS=y
+
+#
+# Target options
+#
+CT_ARCH="x86"
+# CT_ARCH_alpha is not set
+# CT_ARCH_arm is not set
+# CT_ARCH_avr is not set
+# CT_ARCH_m68k is not set
+# CT_ARCH_microblaze is not set
+# CT_ARCH_mips is not set
+# CT_ARCH_nios2 is not set
+# CT_ARCH_powerpc is not set
+# CT_ARCH_s390 is not set
+# CT_ARCH_sh is not set
+# CT_ARCH_sparc is not set
+CT_ARCH_x86=y
+## CT_ARCH_X86=y
+# CT_ARCH_xtensa is not set
+CT_ARCH_alpha_AVAILABLE=y
+CT_ARCH_arm_AVAILABLE=y
+CT_ARCH_avr_AVAILABLE=y
+CT_ARCH_m68k_AVAILABLE=y
+CT_ARCH_microblaze_AVAILABLE=y
+CT_ARCH_mips_AVAILABLE=y
+CT_ARCH_nios2_AVAILABLE=y
+CT_ARCH_powerpc_AVAILABLE=y
+CT_ARCH_s390_AVAILABLE=y
+CT_ARCH_sh_AVAILABLE=y
+CT_ARCH_sparc_AVAILABLE=y
+CT_ARCH_x86_AVAILABLE=y
+CT_ARCH_xtensa_AVAILABLE=y
+CT_ARCH_SUFFIX=""
+
+#
+# Generic target options
+#
+CT_MULTILIB=y
+# CT_DEMULTILIB is not set
+CT_ARCH_USE_MMU=y
+CT_ARCH_SUPPORTS_32=y
+CT_ARCH_SUPPORTS_64=y
+CT_ARCH_DEFAULT_32=y
+CT_ARCH_BITNESS=64
+# CT_ARCH_32 is not set
+CT_ARCH_64=y
+
+#
+# Target optimisations
+#
+CT_ARCH_SUPPORTS_WITH_ARCH=y
+CT_ARCH_SUPPORTS_WITH_CPU=y
+CT_ARCH_SUPPORTS_WITH_TUNE=y
+CT_ARCH_ARCH=""
+CT_ARCH_CPU=""
+CT_ARCH_TUNE=""
+CT_TARGET_CFLAGS=""
+CT_TARGET_LDFLAGS=""
+CT_ARCH_FLOAT=""
+
+#
+# Toolchain options
+#
+
+#
+# General toolchain options
+#
+CT_FORCE_SYSROOT=y
+CT_USE_SYSROOT=y
+CT_SYSROOT_NAME="sysroot"
+CT_SYSROOT_DIR_PREFIX=""
+CT_WANTS_STATIC_LINK=y
+CT_WANTS_STATIC_LINK_CXX=y
+# CT_STATIC_TOOLCHAIN is not set
+CT_TOOLCHAIN_PKGVERSION=""
+CT_TOOLCHAIN_BUGURL=""
+
+#
+# Tuple completion and aliasing
+#
+CT_TARGET_VENDOR="w64"
+CT_TARGET_ALIAS_SED_EXPR=""
+CT_TARGET_ALIAS=""
+
+#
+# Toolchain type
+#
+# CT_NATIVE is not set
+CT_CROSS=y
+# CT_CROSS_NATIVE is not set
+# CT_CANADIAN is not set
+CT_TOOLCHAIN_TYPE="cross"
+
+#
+# Build system
+#
+CT_BUILD=""
+CT_BUILD_PREFIX=""
+CT_BUILD_SUFFIX=""
+
+#
+# Misc options
+#
+# CT_TOOLCHAIN_ENABLE_NLS is not set
+
+#
+# Operating System
+#
+CT_WINDOWS=y
+CT_KERNEL="windows"
+# CT_KERNEL_bare_metal is not set
+# CT_KERNEL_linux is not set
+CT_KERNEL_windows=y
+## CT_KERNEL_WINDOWS=y
+CT_KERNEL_bare_metal_AVAILABLE=y
+CT_KERNEL_linux_AVAILABLE=y
+CT_KERNEL_windows_AVAILABLE=y
+
+#
+# Common kernel options
+#
+
+#
+# Binary utilities
+#
+CT_ARCH_BINFMT_ELF=y
+CT_BINUTILS="binutils"
+CT_BINUTILS_binutils=y
+
+#
+# GNU binutils
+#
+# CT_BINUTILS_CUSTOM is not set
+CT_BINUTILS_VERSION="2.28"
+# CT_BINUTILS_SHOW_LINARO is not set
+CT_BINUTILS_V_2_28=y
+# CT_BINUTILS_V_2_27 is not set
+# CT_BINUTILS_V_2_26 is not set
+CT_BINUTILS_2_27_or_later=y
+CT_BINUTILS_2_26_or_later=y
+CT_BINUTILS_2_25_1_or_later=y
+CT_BINUTILS_2_25_or_later=y
+CT_BINUTILS_2_24_or_later=y
+CT_BINUTILS_2_23_2_or_later=y
+CT_BINUTILS_HAS_HASH_STYLE=y
+CT_BINUTILS_HAS_GOLD=y
+CT_BINUTILS_GOLD_SUPPORTS_ARCH=y
+CT_BINUTILS_GOLD_SUPPORT=y
+CT_BINUTILS_HAS_PLUGINS=y
+CT_BINUTILS_HAS_PKGVERSION_BUGURL=y
+CT_BINUTILS_LINKER_LD=y
+# CT_BINUTILS_LINKER_GOLD is not set
+# CT_BINUTILS_LINKER_LD_GOLD is not set
+# CT_BINUTILS_LINKER_GOLD_LD is not set
+CT_BINUTILS_LINKERS_LIST="ld"
+CT_BINUTILS_LINKER_DEFAULT="bfd"
+CT_BINUTILS_PLUGINS=y
+CT_BINUTILS_EXTRA_CONFIG_ARRAY=""
+# CT_BINUTILS_FOR_TARGET is not set
+
+#
+# binutils other options
+#
+
+#
+# C-library
+#
+CT_LIBC="mingw"
+CT_LIBC_mingw=y
+CT_LIBC_avr_libc_AVAILABLE=y
+CT_LIBC_glibc_AVAILABLE=y
+CT_THREADS="posix"
+CT_LIBC_mingw_AVAILABLE=y
+# CT_WINAPI_V_5_0_1 is not set
+# CT_WINAPI_V_4_0_6 is not set
+# CT_WINAPI_V_select is not set
+CT_WINAPI_V_DEVEL=y
+## CT_MINGW_W64_SRC_DEVEL=y
+CT_WINAPI_VERSION="devel"
+CT_MINGW_SECURE_API=y
+CT_MINGW_DIRECTX=y
+CT_MINGW_DDK=y
+CT_MINGW_TOOLS=y
+CT_MINGW_TOOL_LIST_ARRAY="gendef genidl genlib genpeimg widl"
+CT_LIBC_musl_AVAILABLE=y
+CT_LIBC_newlib_AVAILABLE=y
+CT_LIBC_none_AVAILABLE=y
+CT_LIBC_uClibc_AVAILABLE=y
+CT_LIBC_SUPPORT_THREADS_ANY=y
+CT_LIBC_SUPPORT_THREADS_NATIVE=y
+CT_LIBC_SUPPORT_THREADS_POSIX=y
+
+#
+# Common C library options
+#
+# CT_THREADS_NATIVE is not set
+CT_THREADS_POSIX=y
+
+#
+# C compiler
+#
+CT_CC="gcc"
+CT_CC_CORE_PASS_2_NEEDED=y
+CT_CC_gcc=y
+# CT_CC_GCC_CUSTOM is not set
+CT_CC_GCC_VERSION="6.3.0"
+# CT_CC_GCC_SHOW_LINARO is not set
+CT_CC_GCC_V_6_3_0=y
+# CT_CC_GCC_V_5_4_0 is not set
+# CT_CC_GCC_V_4_9_4 is not set
+CT_CC_GCC_4_8_or_later=y
+CT_CC_GCC_4_9_or_later=y
+CT_CC_GCC_5_or_later=y
+CT_CC_GCC_6=y
+CT_CC_GCC_6_or_later=y
+CT_CC_GCC_ENABLE_PLUGINS=y
+CT_CC_GCC_HAS_LIBMPX=y
+CT_CC_GCC_ENABLE_CXX_FLAGS=""
+CT_CC_GCC_CORE_EXTRA_CONFIG_ARRAY=""
+CT_CC_GCC_EXTRA_CONFIG_ARRAY=""
+CT_CC_GCC_MULTILIB_LIST=""
+CT_CC_GCC_STATIC_LIBSTDCXX=y
+# CT_CC_GCC_SYSTEM_ZLIB is not set
+CT_CC_GCC_CONFIG_TLS=m
+
+#
+# Optimisation features
+#
+CT_CC_GCC_USE_GRAPHITE=y
+CT_CC_GCC_USE_LTO=y
+
+#
+# Settings for libraries running on target
+#
+CT_CC_GCC_ENABLE_TARGET_OPTSPACE=y
+# CT_CC_GCC_LIBMUDFLAP is not set
+# CT_CC_GCC_LIBGOMP is not set
+# CT_CC_GCC_LIBSSP is not set
+# CT_CC_GCC_LIBQUADMATH is not set
+
+#
+# Misc. obscure options.
+#
+CT_CC_CXA_ATEXIT=y
+# CT_CC_GCC_DISABLE_PCH is not set
+CT_CC_GCC_SJLJ_EXCEPTIONS=m
+CT_CC_GCC_LDBL_128=m
+# CT_CC_GCC_BUILD_ID is not set
+CT_CC_GCC_LNK_HASH_STYLE_DEFAULT=y
+# CT_CC_GCC_LNK_HASH_STYLE_SYSV is not set
+# CT_CC_GCC_LNK_HASH_STYLE_GNU is not set
+# CT_CC_GCC_LNK_HASH_STYLE_BOTH is not set
+CT_CC_GCC_LNK_HASH_STYLE=""
+CT_CC_GCC_DEC_FLOAT_AUTO=y
+# CT_CC_GCC_DEC_FLOAT_BID is not set
+# CT_CC_GCC_DEC_FLOAT_DPD is not set
+# CT_CC_GCC_DEC_FLOATS_NO is not set
+CT_CC_SUPPORT_CXX=y
+CT_CC_SUPPORT_FORTRAN=y
+CT_CC_SUPPORT_JAVA=y
+CT_CC_SUPPORT_ADA=y
+CT_CC_SUPPORT_OBJC=y
+CT_CC_SUPPORT_OBJCXX=y
+CT_CC_SUPPORT_GOLANG=y
+
+#
+# Additional supported languages:
+#
+CT_CC_LANG_CXX=y
+CT_CC_LANG_FORTRAN=y
+# CT_CC_LANG_JAVA is not set
+# CT_CC_LANG_ADA is not set
+# CT_CC_LANG_OBJC is not set
+# CT_CC_LANG_OBJCXX is not set
+# CT_CC_LANG_GOLANG is not set
+CT_CC_LANG_OTHERS=""
+
+#
+# Debug facilities
+#
+# CT_DEBUG_duma is not set
+# CT_DEBUG_gdb is not set
+# CT_DEBUG_ltrace is not set
+# CT_DEBUG_strace is not set
+
+#
+# Companion libraries
+#
+CT_COMPLIBS_NEEDED=y
+CT_GMP_NEEDED=y
+CT_MPFR_NEEDED=y
+CT_ISL_NEEDED=y
+CT_MPC_NEEDED=y
+CT_COMPLIBS=y
+# CT_LIBICONV is not set
+# CT_GETTEXT is not set
+CT_GMP=y
+CT_MPFR=y
+CT_ISL=y
+CT_MPC=y
+# CT_ZLIB is not set
+CT_GMP_V_6_1_2=y
+CT_GMP_5_0_2_or_later=y
+CT_GMP_VERSION="6.1.2"
+CT_MPFR_V_3_1_5=y
+CT_MPFR_VERSION="3.1.5"
+CT_ISL_V_0_18=y
+# CT_ISL_V_0_17_1 is not set
+# CT_ISL_V_0_16_1 is not set
+# CT_ISL_V_0_15 is not set
+CT_ISL_V_0_16_or_later=y
+CT_ISL_V_0_15_or_later=y
+CT_ISL_V_0_14_or_later=y
+CT_ISL_V_0_12_or_later=y
+CT_ISL_VERSION="0.18"
+CT_MPC_V_1_0_3=y
+CT_MPC_VERSION="1.0.3"
+
+#
+# Companion libraries common options
+#
+# CT_COMPLIBS_CHECK is not set
+
+#
+# Companion tools
+#
+# CT_COMP_TOOLS_FOR_HOST is not set
+# CT_COMP_TOOLS_autoconf is not set
+# CT_COMP_TOOLS_automake is not set
+# CT_COMP_TOOLS_libtool is not set
+# CT_COMP_TOOLS_m4 is not set
+# CT_COMP_TOOLS_make is not set
+
+#
+# Test suite
+#
+# CT_TEST_SUITE_GCC is not set
diff --git a/testing/upgrade/samples/v0-0005.config b/testing/upgrade/samples/v0-0005.config
new file mode 100644
index 0000000..5c3ac16
--- /dev/null
+++ b/testing/upgrade/samples/v0-0005.config
@@ -0,0 +1,432 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Crosstool-NG Configuration
+#
+CT_CONFIGURE_has_static_link=y
+CT_CONFIGURE_has_wget=y
+CT_CONFIGURE_has_stat_flavor_GNU=y
+CT_CONFIGURE_has_make_3_81_or_newer=y
+CT_CONFIGURE_has_libtool_2_4_or_newer=y
+CT_CONFIGURE_has_libtoolize_2_4_or_newer=y
+CT_CONFIGURE_has_autoconf_2_63_or_newer=y
+CT_CONFIGURE_has_autoreconf_2_63_or_newer=y
+CT_CONFIGURE_has_automake_1_15_or_newer=y
+CT_CONFIGURE_has_gnu_m4_1_4_12_or_newer=y
+CT_CONFIGURE_has_svn=y
+CT_CONFIGURE_has_git=y
+CT_MODULES=y
+
+#
+# Paths and misc options
+#
+
+#
+# crosstool-NG behavior
+#
+# CT_OBSOLETE is not set
+# CT_EXPERIMENTAL is not set
+# CT_DEBUG_CT is not set
+
+#
+# Paths
+#
+CT_LOCAL_TARBALLS_DIR="${HOME}/src"
+CT_SAVE_TARBALLS=y
+CT_WORK_DIR="${CT_TOP_DIR}/.build"
+CT_BUILD_TOP_DIR="${CT_WORK_DIR}/${CT_HOST:+HOST-${CT_HOST}/}${CT_TARGET}"
+CT_PREFIX_DIR="${CT_PREFIX:-${HOME}/x-tools}/${CT_HOST:+HOST-${CT_HOST}/}${CT_TARGET}"
+CT_RM_RF_PREFIX_DIR=y
+CT_REMOVE_DOCS=y
+CT_PREFIX_DIR_RO=y
+CT_STRIP_HOST_TOOLCHAIN_EXECUTABLES=y
+# CT_STRIP_TARGET_TOOLCHAIN_EXECUTABLES is not set
+
+#
+# Downloading
+#
+CT_DOWNLOAD_AGENT_WGET=y
+# CT_DOWNLOAD_AGENT_NONE is not set
+# CT_FORBID_DOWNLOAD is not set
+# CT_FORCE_DOWNLOAD is not set
+CT_CONNECT_TIMEOUT=10
+CT_DOWNLOAD_WGET_OPTIONS="--passive-ftp --tries=3 -nc --progress=dot:binary"
+# CT_ONLY_DOWNLOAD is not set
+# CT_USE_MIRROR is not set
+
+#
+# Extracting
+#
+# CT_FORCE_EXTRACT is not set
+CT_OVERRIDE_CONFIG_GUESS_SUB=y
+# CT_ONLY_EXTRACT is not set
+CT_PATCH_BUNDLED=y
+# CT_PATCH_LOCAL is not set
+# CT_PATCH_BUNDLED_LOCAL is not set
+# CT_PATCH_LOCAL_BUNDLED is not set
+# CT_PATCH_BUNDLED_FALLBACK_LOCAL is not set
+# CT_PATCH_LOCAL_FALLBACK_BUNDLED is not set
+# CT_PATCH_NONE is not set
+CT_PATCH_ORDER="bundled"
+
+#
+# Build behavior
+#
+CT_PARALLEL_JOBS=0
+CT_LOAD=""
+CT_USE_PIPES=y
+CT_EXTRA_CFLAGS_FOR_BUILD=""
+CT_EXTRA_LDFLAGS_FOR_BUILD=""
+CT_EXTRA_CFLAGS_FOR_HOST=""
+CT_EXTRA_LDFLAGS_FOR_HOST=""
+# CT_CONFIG_SHELL_SH is not set
+# CT_CONFIG_SHELL_ASH is not set
+CT_CONFIG_SHELL_BASH=y
+# CT_CONFIG_SHELL_CUSTOM is not set
+CT_CONFIG_SHELL="${bash}"
+
+#
+# Logging
+#
+# CT_LOG_ERROR is not set
+# CT_LOG_WARN is not set
+# CT_LOG_INFO is not set
+CT_LOG_EXTRA=y
+# CT_LOG_ALL is not set
+# CT_LOG_DEBUG is not set
+CT_LOG_LEVEL_MAX="EXTRA"
+# CT_LOG_SEE_TOOLS_WARN is not set
+CT_LOG_PROGRESS_BAR=y
+CT_LOG_TO_FILE=y
+CT_LOG_FILE_COMPRESS=y
+
+#
+# Target options
+#
+CT_ARCH="avr"
+# CT_ARCH_alpha is not set
+# CT_ARCH_arm is not set
+CT_ARCH_avr=y
+## CT_ARCH_AVR=y
+# CT_ARCH_m68k is not set
+# CT_ARCH_mips is not set
+# CT_ARCH_nios2 is not set
+# CT_ARCH_powerpc is not set
+# CT_ARCH_s390 is not set
+# CT_ARCH_sh is not set
+# CT_ARCH_sparc is not set
+# CT_ARCH_x86 is not set
+# CT_ARCH_xtensa is not set
+CT_ARCH_alpha_AVAILABLE=y
+CT_ARCH_arm_AVAILABLE=y
+CT_ARCH_avr_AVAILABLE=y
+CT_ARCH_m68k_AVAILABLE=y
+CT_ARCH_microblaze_AVAILABLE=y
+CT_ARCH_mips_AVAILABLE=y
+CT_ARCH_nios2_AVAILABLE=y
+CT_ARCH_powerpc_AVAILABLE=y
+CT_ARCH_s390_AVAILABLE=y
+CT_ARCH_sh_AVAILABLE=y
+CT_ARCH_sparc_AVAILABLE=y
+CT_ARCH_x86_AVAILABLE=y
+CT_ARCH_xtensa_AVAILABLE=y
+CT_ARCH_SUFFIX=""
+
+#
+# Generic target options
+#
+CT_ARCH_REQUIRES_MULTILIB=y
+CT_MULTILIB=y
+CT_ARCH_SUPPORTS_8=y
+CT_ARCH_DEFAULT_8=y
+CT_ARCH_BITNESS=8
+CT_ARCH_8=y
+
+#
+# Target optimisations
+#
+CT_TARGET_CFLAGS=""
+CT_TARGET_LDFLAGS=""
+CT_ARCH_FLOAT=""
+
+#
+# Toolchain options
+#
+
+#
+# General toolchain options
+#
+CT_WANTS_STATIC_LINK=y
+CT_WANTS_STATIC_LINK_CXX=y
+# CT_STATIC_TOOLCHAIN is not set
+CT_TOOLCHAIN_PKGVERSION=""
+CT_TOOLCHAIN_BUGURL=""
+
+#
+# Tuple completion and aliasing
+#
+CT_TARGET_ALIAS_SED_EXPR=""
+CT_TARGET_ALIAS=""
+
+#
+# Toolchain type
+#
+CT_CROSS=y
+# CT_CANADIAN is not set
+CT_TOOLCHAIN_TYPE="cross"
+
+#
+# Build system
+#
+CT_BUILD=""
+CT_BUILD_PREFIX=""
+CT_BUILD_SUFFIX=""
+
+#
+# Misc options
+#
+# CT_TOOLCHAIN_ENABLE_NLS is not set
+
+#
+# Operating System
+#
+CT_BARE_METAL=y
+CT_KERNEL="bare-metal"
+CT_KERNEL_bare_metal=y
+CT_KERNEL_bare_metal_AVAILABLE=y
+CT_KERNEL_linux_AVAILABLE=y
+CT_KERNEL_windows_AVAILABLE=y
+
+#
+# Common kernel options
+#
+
+#
+# Binary utilities
+#
+CT_ARCH_BINFMT_ELF=y
+# CT_ARCH_BINFMT_FLAT is not set
+# CT_ARCH_BINFMT_FDPIC is not set
+CT_BINUTILS="binutils"
+CT_BINUTILS_binutils=y
+
+#
+# GNU binutils
+#
+CT_BINUTILS_VERSION="2.28"
+# CT_BINUTILS_SHOW_LINARO is not set
+CT_BINUTILS_V_2_28=y
+# CT_BINUTILS_V_2_27 is not set
+# CT_BINUTILS_V_2_26 is not set
+CT_BINUTILS_2_27_or_later=y
+CT_BINUTILS_2_26_or_later=y
+CT_BINUTILS_2_25_1_or_later=y
+CT_BINUTILS_2_25_or_later=y
+CT_BINUTILS_2_24_or_later=y
+CT_BINUTILS_2_23_2_or_later=y
+CT_BINUTILS_HAS_HASH_STYLE=y
+CT_BINUTILS_HAS_GOLD=y
+CT_BINUTILS_HAS_PLUGINS=y
+CT_BINUTILS_HAS_PKGVERSION_BUGURL=y
+CT_BINUTILS_LINKER_LD=y
+CT_BINUTILS_LINKERS_LIST="ld"
+CT_BINUTILS_LINKER_DEFAULT="bfd"
+# CT_BINUTILS_PLUGINS is not set
+CT_BINUTILS_EXTRA_CONFIG_ARRAY=""
+
+#
+# binutils other options
+#
+
+#
+# C-library
+#
+CT_LIBC="avr-libc"
+CT_LIBC_VERSION="2.0.0"
+CT_LIBC_avr_libc=y
+## CT_LIBC_AVR_LIBC=y
+# CT_LIBC_newlib is not set
+# CT_LIBC_none is not set
+CT_LIBC_avr_libc_AVAILABLE=y
+CT_LIBC_AVR_LIBC_V_2_0_0=y
+## CT_AVR_LIBC_V_2_0_0=y
+# CT_LIBC_AVR_LIBC_V_1_8_1 is not set
+# CT_LIBC_AVR_LIBC_V_1_8_0 is not set
+CT_LIBC_glibc_AVAILABLE=y
+CT_THREADS="none"
+CT_LIBC_mingw_AVAILABLE=y
+CT_LIBC_musl_AVAILABLE=y
+CT_LIBC_newlib_AVAILABLE=y
+CT_LIBC_none_AVAILABLE=y
+CT_LIBC_uClibc_AVAILABLE=y
+CT_LIBC_SUPPORT_THREADS_NONE=y
+
+#
+# Common C library options
+#
+CT_THREADS_NONE=y
+
+#
+# avr-libc other options
+#
+CT_LIBC_AVR_LIBC_EXTRA_CONFIG_ARRAY=""
+
+#
+# C compiler
+#
+CT_CC="gcc"
+CT_CC_gcc=y
+CT_CC_GCC_VERSION="6.3.0"
+# CT_CC_GCC_SHOW_LINARO is not set
+CT_CC_GCC_V_6_3_0=y
+# CT_CC_GCC_V_5_4_0 is not set
+# CT_CC_GCC_V_4_9_4 is not set
+CT_CC_GCC_4_8_or_later=y
+CT_CC_GCC_4_9_or_later=y
+CT_CC_GCC_5_or_later=y
+CT_CC_GCC_6=y
+CT_CC_GCC_6_or_later=y
+CT_CC_GCC_HAS_LIBMPX=y
+CT_CC_GCC_ENABLE_CXX_FLAGS=""
+CT_CC_GCC_EXTRA_CONFIG_ARRAY=""
+CT_CC_GCC_MULTILIB_LIST=""
+# CT_CC_GCC_TARGET_FINAL is not set
+CT_CC_GCC_STATIC_LIBSTDCXX=y
+# CT_CC_GCC_SYSTEM_ZLIB is not set
+CT_CC_GCC_CONFIG_TLS=m
+
+#
+# Optimisation features
+#
+CT_CC_GCC_USE_GRAPHITE=y
+CT_CC_GCC_USE_LTO=y
+
+#
+# Settings for libraries running on target
+#
+CT_CC_GCC_ENABLE_TARGET_OPTSPACE=y
+# CT_CC_GCC_LIBMUDFLAP is not set
+# CT_CC_GCC_LIBSSP is not set
+# CT_CC_GCC_LIBQUADMATH is not set
+
+#
+# Misc. obscure options.
+#
+# CT_CC_GCC_DISABLE_PCH is not set
+CT_CC_GCC_LDBL_128=m
+# CT_CC_GCC_BUILD_ID is not set
+CT_CC_GCC_LNK_HASH_STYLE_DEFAULT=y
+# CT_CC_GCC_LNK_HASH_STYLE_SYSV is not set
+# CT_CC_GCC_LNK_HASH_STYLE_GNU is not set
+# CT_CC_GCC_LNK_HASH_STYLE_BOTH is not set
+CT_CC_GCC_LNK_HASH_STYLE=""
+CT_CC_GCC_DEC_FLOAT_AUTO=y
+# CT_CC_GCC_DEC_FLOAT_BID is not set
+# CT_CC_GCC_DEC_FLOAT_DPD is not set
+# CT_CC_GCC_DEC_FLOATS_NO is not set
+CT_CC_SUPPORT_CXX=y
+CT_CC_SUPPORT_FORTRAN=y
+CT_CC_SUPPORT_JAVA=y
+CT_CC_SUPPORT_ADA=y
+CT_CC_SUPPORT_OBJC=y
+CT_CC_SUPPORT_OBJCXX=y
+CT_CC_SUPPORT_GOLANG=y
+
+#
+# Additional supported languages:
+#
+CT_CC_LANG_CXX=y
+# CT_CC_LANG_FORTRAN is not set
+
+#
+# Debug facilities
+#
+CT_DEBUG_gdb=y
+CT_GDB_CROSS=y
+# CT_GDB_CROSS_STATIC is not set
+# CT_GDB_CROSS_SIM is not set
+CT_GDB_CROSS_PYTHON=y
+CT_GDB_CROSS_PYTHON_BINARY=""
+CT_GDB_CROSS_EXTRA_CONFIG_ARRAY=""
+
+#
+# In bare-metal, you'll need to   
+#
+
+#
+# provide your own gdbserver stub.
+#
+
+#
+# gdb version
+#
+CT_GDB_VERSION="7.12.1"
+CT_GDB_V_7_12_1=y
+# CT_GDB_V_7_11_1 is not set
+CT_GDB_7_12_or_later=y
+CT_GDB_7_2_or_later=y
+CT_GDB_7_0_or_later=y
+CT_GDB_HAS_PKGVERSION_BUGURL=y
+CT_GDB_HAS_PYTHON=y
+CT_GDB_INSTALL_GDBINIT=y
+# CT_DEBUG_ltrace is not set
+# CT_DEBUG_strace is not set
+
+#
+# Companion libraries
+#
+CT_COMPLIBS_NEEDED=y
+CT_GMP_NEEDED=y
+CT_MPFR_NEEDED=y
+CT_ISL_NEEDED=y
+CT_MPC_NEEDED=y
+CT_EXPAT_NEEDED=y
+CT_NCURSES_NEEDED=y
+CT_COMPLIBS=y
+# CT_LIBICONV is not set
+# CT_GETTEXT is not set
+CT_GMP=y
+CT_MPFR=y
+CT_ISL=y
+CT_MPC=y
+CT_EXPAT=y
+CT_NCURSES=y
+# CT_ZLIB is not set
+CT_GMP_V_6_1_2=y
+CT_GMP_5_0_2_or_later=y
+CT_GMP_VERSION="6.1.2"
+CT_MPFR_V_3_1_5=y
+CT_MPFR_VERSION="3.1.5"
+CT_ISL_V_0_16_1=y
+# CT_ISL_V_0_15 is not set
+CT_ISL_V_0_16_or_later=y
+CT_ISL_V_0_15_or_later=y
+CT_ISL_V_0_14_or_later=y
+CT_ISL_V_0_12_or_later=y
+CT_ISL_VERSION="0.16.1"
+CT_MPC_V_1_0_3=y
+CT_MPC_VERSION="1.0.3"
+CT_EXPAT_V_2_2_0=y
+CT_EXPAT_VERSION="2.2.0"
+CT_NCURSES_V_6_0=y
+CT_NCURSES_VERSION="6.0"
+CT_NCURSES_HOST_CONFIG_ARGS=""
+CT_NCURSES_HOST_DISABLE_DB=y
+CT_NCURSES_HOST_FALLBACKS="linux,xterm,xterm-color,xterm-256color,vt100"
+CT_NCURSES_TARGET_CONFIG_ARGS=""
+# CT_NCURSES_TARGET_DISABLE_DB is not set
+CT_NCURSES_TARGET_FALLBACKS=""
+
+#
+# Companion libraries common options
+#
+# CT_COMPLIBS_CHECK is not set
+
+#
+# Companion tools
+#
+# CT_COMP_TOOLS_FOR_HOST is not set
+# CT_COMP_TOOLS_autoconf is not set
+# CT_COMP_TOOLS_automake is not set
+# CT_COMP_TOOLS_libtool is not set
+# CT_COMP_TOOLS_m4 is not set
+# CT_COMP_TOOLS_make is not set
diff --git a/testing/upgrade/samples/v0-0006.config b/testing/upgrade/samples/v0-0006.config
new file mode 100644
index 0000000..d6c50cb
--- /dev/null
+++ b/testing/upgrade/samples/v0-0006.config
@@ -0,0 +1,521 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Crosstool-NG Configuration
+#
+CT_CONFIGURE_has_static_link=y
+CT_CONFIGURE_has_wget=y
+CT_CONFIGURE_has_stat_flavor_GNU=y
+CT_CONFIGURE_has_make_3_81_or_newer=y
+CT_CONFIGURE_has_libtool_2_4_or_newer=y
+CT_CONFIGURE_has_libtoolize_2_4_or_newer=y
+CT_CONFIGURE_has_autoconf_2_63_or_newer=y
+CT_CONFIGURE_has_autoreconf_2_63_or_newer=y
+CT_CONFIGURE_has_automake_1_15_or_newer=y
+CT_CONFIGURE_has_gnu_m4_1_4_12_or_newer=y
+CT_CONFIGURE_has_svn=y
+CT_CONFIGURE_has_git=y
+CT_MODULES=y
+
+#
+# Paths and misc options
+#
+
+#
+# crosstool-NG behavior
+#
+# CT_OBSOLETE is not set
+# CT_EXPERIMENTAL is not set
+# CT_DEBUG_CT is not set
+
+#
+# Paths
+#
+CT_LOCAL_TARBALLS_DIR="${HOME}/src"
+CT_SAVE_TARBALLS=y
+CT_WORK_DIR="${CT_TOP_DIR}/.build"
+CT_BUILD_TOP_DIR="${CT_WORK_DIR}/${CT_HOST:+HOST-${CT_HOST}/}${CT_TARGET}"
+CT_PREFIX_DIR="${CT_PREFIX:-${HOME}/x-tools}/${CT_HOST:+HOST-${CT_HOST}/}${CT_TARGET}"
+CT_RM_RF_PREFIX_DIR=y
+CT_REMOVE_DOCS=y
+CT_PREFIX_DIR_RO=y
+CT_STRIP_HOST_TOOLCHAIN_EXECUTABLES=y
+# CT_STRIP_TARGET_TOOLCHAIN_EXECUTABLES is not set
+
+#
+# Downloading
+#
+CT_DOWNLOAD_AGENT_WGET=y
+# CT_DOWNLOAD_AGENT_NONE is not set
+# CT_FORBID_DOWNLOAD is not set
+# CT_FORCE_DOWNLOAD is not set
+CT_CONNECT_TIMEOUT=10
+CT_DOWNLOAD_WGET_OPTIONS="--passive-ftp --tries=3 -nc --progress=dot:binary"
+# CT_ONLY_DOWNLOAD is not set
+# CT_USE_MIRROR is not set
+
+#
+# Extracting
+#
+# CT_FORCE_EXTRACT is not set
+CT_OVERRIDE_CONFIG_GUESS_SUB=y
+# CT_ONLY_EXTRACT is not set
+CT_PATCH_BUNDLED=y
+# CT_PATCH_LOCAL is not set
+# CT_PATCH_BUNDLED_LOCAL is not set
+# CT_PATCH_LOCAL_BUNDLED is not set
+# CT_PATCH_BUNDLED_FALLBACK_LOCAL is not set
+# CT_PATCH_LOCAL_FALLBACK_BUNDLED is not set
+# CT_PATCH_NONE is not set
+CT_PATCH_ORDER="bundled"
+
+#
+# Build behavior
+#
+CT_PARALLEL_JOBS=0
+CT_LOAD=""
+CT_USE_PIPES=y
+CT_EXTRA_CFLAGS_FOR_BUILD=""
+CT_EXTRA_LDFLAGS_FOR_BUILD=""
+CT_EXTRA_CFLAGS_FOR_HOST=""
+CT_EXTRA_LDFLAGS_FOR_HOST=""
+# CT_CONFIG_SHELL_SH is not set
+# CT_CONFIG_SHELL_ASH is not set
+CT_CONFIG_SHELL_BASH=y
+# CT_CONFIG_SHELL_CUSTOM is not set
+CT_CONFIG_SHELL="${bash}"
+
+#
+# Logging
+#
+# CT_LOG_ERROR is not set
+# CT_LOG_WARN is not set
+# CT_LOG_INFO is not set
+CT_LOG_EXTRA=y
+# CT_LOG_ALL is not set
+# CT_LOG_DEBUG is not set
+CT_LOG_LEVEL_MAX="EXTRA"
+# CT_LOG_SEE_TOOLS_WARN is not set
+CT_LOG_PROGRESS_BAR=y
+CT_LOG_TO_FILE=y
+CT_LOG_FILE_COMPRESS=y
+
+#
+# Target options
+#
+CT_ARCH="mips"
+# CT_ARCH_alpha is not set
+# CT_ARCH_arm is not set
+# CT_ARCH_avr is not set
+# CT_ARCH_m68k is not set
+CT_ARCH_mips=y
+## CT_ARCH_MIPS=y
+# CT_ARCH_nios2 is not set
+# CT_ARCH_powerpc is not set
+# CT_ARCH_s390 is not set
+# CT_ARCH_sh is not set
+# CT_ARCH_sparc is not set
+# CT_ARCH_x86 is not set
+# CT_ARCH_xtensa is not set
+CT_ARCH_alpha_AVAILABLE=y
+CT_ARCH_arm_AVAILABLE=y
+CT_ARCH_avr_AVAILABLE=y
+CT_ARCH_m68k_AVAILABLE=y
+CT_ARCH_microblaze_AVAILABLE=y
+CT_ARCH_mips_AVAILABLE=y
+CT_ARCH_nios2_AVAILABLE=y
+CT_ARCH_powerpc_AVAILABLE=y
+CT_ARCH_s390_AVAILABLE=y
+CT_ARCH_sh_AVAILABLE=y
+CT_ARCH_sparc_AVAILABLE=y
+CT_ARCH_x86_AVAILABLE=y
+CT_ARCH_xtensa_AVAILABLE=y
+CT_ARCH_SUFFIX=""
+
+#
+# Generic target options
+#
+# CT_MULTILIB is not set
+CT_DEMULTILIB=y
+CT_ARCH_USE_MMU=y
+CT_ARCH_SUPPORTS_BOTH_ENDIAN=y
+CT_ARCH_DEFAULT_BE=y
+CT_ARCH_BE=y
+# CT_ARCH_LE is not set
+CT_ARCH_ENDIAN="big"
+CT_ARCH_SUPPORTS_32=y
+CT_ARCH_SUPPORTS_64=y
+CT_ARCH_DEFAULT_32=y
+CT_ARCH_BITNESS=32
+CT_ARCH_32=y
+# CT_ARCH_64 is not set
+
+#
+# Target optimisations
+#
+CT_ARCH_SUPPORTS_WITH_ARCH=y
+CT_ARCH_SUPPORTS_WITH_TUNE=y
+CT_ARCH_SUPPORTS_WITH_FLOAT=y
+CT_ARCH_ARCH="mips1"
+CT_ARCH_TUNE=""
+# CT_ARCH_FLOAT_AUTO is not set
+# CT_ARCH_FLOAT_HW is not set
+CT_ARCH_FLOAT_SW=y
+CT_TARGET_CFLAGS=""
+CT_TARGET_LDFLAGS=""
+CT_ARCH_FLOAT="soft"
+
+#
+# mips other options
+#
+CT_ARCH_mips_o32=y
+CT_ARCH_mips_ABI="32"
+
+#
+# Toolchain options
+#
+
+#
+# General toolchain options
+#
+CT_FORCE_SYSROOT=y
+CT_USE_SYSROOT=y
+CT_SYSROOT_NAME="sysroot"
+CT_SYSROOT_DIR_PREFIX=""
+CT_WANTS_STATIC_LINK=y
+CT_WANTS_STATIC_LINK_CXX=y
+# CT_STATIC_TOOLCHAIN is not set
+CT_TOOLCHAIN_PKGVERSION=""
+CT_TOOLCHAIN_BUGURL=""
+
+#
+# Tuple completion and aliasing
+#
+CT_TARGET_VENDOR="unknown"
+CT_TARGET_ALIAS_SED_EXPR=""
+CT_TARGET_ALIAS=""
+
+#
+# Toolchain type
+#
+CT_CROSS=y
+# CT_CANADIAN is not set
+CT_TOOLCHAIN_TYPE="cross"
+
+#
+# Build system
+#
+CT_BUILD=""
+CT_BUILD_PREFIX=""
+CT_BUILD_SUFFIX=""
+
+#
+# Misc options
+#
+# CT_TOOLCHAIN_ENABLE_NLS is not set
+
+#
+# Operating System
+#
+CT_KERNEL_SUPPORTS_SHARED_LIBS=y
+CT_KERNEL="linux"
+CT_KERNEL_VERSION="4.10.8"
+# CT_KERNEL_bare_metal is not set
+CT_KERNEL_linux=y
+CT_KERNEL_bare_metal_AVAILABLE=y
+CT_KERNEL_linux_AVAILABLE=y
+# CT_KERNEL_LINUX_CUSTOM is not set
+CT_KERNEL_V_4_10=y
+## CT_LINUX_V_4_10=y
+# CT_KERNEL_V_4_9 is not set
+# CT_KERNEL_V_4_4 is not set
+# CT_KERNEL_V_4_1 is not set
+# CT_KERNEL_V_3_16 is not set
+# CT_KERNEL_V_3_12 is not set
+# CT_KERNEL_V_3_10 is not set
+# CT_KERNEL_V_3_4 is not set
+# CT_KERNEL_V_3_2 is not set
+CT_KERNEL_windows_AVAILABLE=y
+
+#
+# Common kernel options
+#
+CT_SHARED_LIBS=y
+
+#
+# linux other options
+#
+CT_KERNEL_LINUX_VERBOSITY_0=y
+# CT_KERNEL_LINUX_VERBOSITY_1 is not set
+# CT_KERNEL_LINUX_VERBOSITY_2 is not set
+CT_KERNEL_LINUX_VERBOSE_LEVEL=0
+CT_KERNEL_LINUX_INSTALL_CHECK=y
+
+#
+# Binary utilities
+#
+CT_ARCH_BINFMT_ELF=y
+CT_BINUTILS="binutils"
+CT_BINUTILS_binutils=y
+
+#
+# GNU binutils
+#
+CT_BINUTILS_VERSION="2.28"
+# CT_BINUTILS_SHOW_LINARO is not set
+CT_BINUTILS_V_2_28=y
+# CT_BINUTILS_V_2_27 is not set
+# CT_BINUTILS_V_2_26 is not set
+CT_BINUTILS_2_27_or_later=y
+CT_BINUTILS_2_26_or_later=y
+CT_BINUTILS_2_25_1_or_later=y
+CT_BINUTILS_2_25_or_later=y
+CT_BINUTILS_2_24_or_later=y
+CT_BINUTILS_2_23_2_or_later=y
+CT_BINUTILS_HAS_HASH_STYLE=y
+CT_BINUTILS_HAS_GOLD=y
+CT_BINUTILS_HAS_PLUGINS=y
+CT_BINUTILS_HAS_PKGVERSION_BUGURL=y
+CT_BINUTILS_LINKER_LD=y
+CT_BINUTILS_LINKERS_LIST="ld"
+CT_BINUTILS_LINKER_DEFAULT="bfd"
+CT_BINUTILS_PLUGINS=y
+CT_BINUTILS_EXTRA_CONFIG_ARRAY=""
+# CT_BINUTILS_FOR_TARGET is not set
+
+#
+# binutils other options
+#
+
+#
+# C-library
+#
+CT_LIBC="uClibc"
+CT_LIBC_VERSION="1.0.22"
+# CT_LIBC_glibc is not set
+CT_LIBC_uClibc=y
+## CT_LIBC_UCLIBC=y
+## CT_UCLIBC_USE_UCLIBC_NG_ORG=y
+CT_LIBC_avr_libc_AVAILABLE=y
+CT_LIBC_glibc_AVAILABLE=y
+CT_THREADS="nptl"
+CT_LIBC_mingw_AVAILABLE=y
+CT_LIBC_musl_AVAILABLE=y
+CT_LIBC_newlib_AVAILABLE=y
+CT_LIBC_none_AVAILABLE=y
+CT_LIBC_uClibc_AVAILABLE=y
+CT_LIBC_UCLIBC_NG_V_1_0_22=y
+## CT_UCLIBC_NG_V_1_0_25=y
+CT_LIBC_UCLIBC_NG_1_0_15_or_later=y
+CT_LIBC_UCLIBC_NG_1_0_0_or_later=y
+CT_LIBC_UCLIBC_0_9_33_2_or_later=y
+CT_LIBC_UCLIBC_PARALLEL=y
+CT_LIBC_UCLIBC_NG=y
+CT_LIBC_UCLIBC_VERBOSITY_0=y
+# CT_LIBC_UCLIBC_VERBOSITY_1 is not set
+# CT_LIBC_UCLIBC_VERBOSITY_2 is not set
+CT_LIBC_UCLIBC_VERBOSITY=""
+CT_LIBC_UCLIBC_DEBUG_LEVEL_0=y
+# CT_LIBC_UCLIBC_DEBUG_LEVEL_1 is not set
+# CT_LIBC_UCLIBC_DEBUG_LEVEL_2 is not set
+# CT_LIBC_UCLIBC_DEBUG_LEVEL_3 is not set
+CT_LIBC_UCLIBC_DEBUG_LEVEL=0
+CT_LIBC_UCLIBC_CONFIG_FILE=""
+CT_LIBC_SUPPORT_THREADS_ANY=y
+CT_LIBC_SUPPORT_THREADS_NATIVE=y
+CT_LIBC_SUPPORT_THREADS_LT=y
+CT_LIBC_SUPPORT_THREADS_NONE=y
+
+#
+# Common C library options
+#
+CT_THREADS_NATIVE=y
+# CT_THREADS_LT is not set
+# CT_THREADS_NONE is not set
+# CT_CREATE_LDSO_CONF is not set
+CT_LIBC_XLDD=y
+
+#
+# uClibc other options
+#
+CT_LIBC_UCLIBC_LNXTHRD=""
+# CT_LIBC_UCLIBC_LOCALES is not set
+# CT_LIBC_UCLIBC_IPV6 is not set
+CT_LIBC_UCLIBC_WCHAR=y
+# CT_LIBC_UCLIBC_FENV is not set
+# CT_LIBC_UCLIBC_RPC is not set
+
+#
+# C compiler
+#
+CT_CC="gcc"
+CT_CC_CORE_PASSES_NEEDED=y
+CT_CC_CORE_PASS_1_NEEDED=y
+CT_CC_CORE_PASS_2_NEEDED=y
+CT_CC_gcc=y
+CT_CC_GCC_VERSION="6.3.0"
+# CT_CC_GCC_SHOW_LINARO is not set
+CT_CC_GCC_V_6_3_0=y
+# CT_CC_GCC_V_5_4_0 is not set
+# CT_CC_GCC_V_4_9_4 is not set
+CT_CC_GCC_4_8_or_later=y
+CT_CC_GCC_4_9_or_later=y
+CT_CC_GCC_5_or_later=y
+CT_CC_GCC_6=y
+CT_CC_GCC_6_or_later=y
+CT_CC_GCC_ENABLE_PLUGINS=y
+CT_CC_GCC_HAS_LIBMPX=y
+CT_CC_GCC_ENABLE_CXX_FLAGS=""
+CT_CC_GCC_CORE_EXTRA_CONFIG_ARRAY=""
+CT_CC_GCC_EXTRA_CONFIG_ARRAY=""
+CT_CC_GCC_STATIC_LIBSTDCXX=y
+# CT_CC_GCC_SYSTEM_ZLIB is not set
+CT_CC_GCC_CONFIG_TLS=m
+
+#
+# Optimisation features
+#
+CT_CC_GCC_USE_GRAPHITE=y
+CT_CC_GCC_USE_LTO=y
+
+#
+# Settings for libraries running on target
+#
+CT_CC_GCC_ENABLE_TARGET_OPTSPACE=y
+# CT_CC_GCC_LIBMUDFLAP is not set
+# CT_CC_GCC_LIBGOMP is not set
+# CT_CC_GCC_LIBSSP is not set
+# CT_CC_GCC_LIBQUADMATH is not set
+
+#
+# Misc. obscure options.
+#
+CT_CC_CXA_ATEXIT=y
+# CT_CC_GCC_DISABLE_PCH is not set
+CT_CC_GCC_SJLJ_EXCEPTIONS=m
+CT_CC_GCC_LDBL_128=m
+# CT_CC_GCC_BUILD_ID is not set
+CT_CC_GCC_LNK_HASH_STYLE_DEFAULT=y
+# CT_CC_GCC_LNK_HASH_STYLE_SYSV is not set
+# CT_CC_GCC_LNK_HASH_STYLE_GNU is not set
+# CT_CC_GCC_LNK_HASH_STYLE_BOTH is not set
+CT_CC_GCC_LNK_HASH_STYLE=""
+CT_CC_GCC_DEC_FLOAT_AUTO=y
+# CT_CC_GCC_DEC_FLOAT_BID is not set
+# CT_CC_GCC_DEC_FLOAT_DPD is not set
+# CT_CC_GCC_DEC_FLOATS_NO is not set
+CT_CC_GCC_HAS_ARCH_OPTIONS=y
+
+#
+# archictecture-specific options
+#
+CT_CC_GCC_mips_llsc=m
+CT_CC_GCC_mips_synci=m
+CT_CC_GCC_mips_plt=y
+CT_CC_SUPPORT_CXX=y
+CT_CC_SUPPORT_FORTRAN=y
+CT_CC_SUPPORT_JAVA=y
+CT_CC_SUPPORT_ADA=y
+CT_CC_SUPPORT_OBJC=y
+CT_CC_SUPPORT_OBJCXX=y
+CT_CC_SUPPORT_GOLANG=y
+
+#
+# Additional supported languages:
+#
+CT_CC_LANG_CXX=y
+# CT_CC_LANG_FORTRAN is not set
+# CT_CC_LANG_JAVA is not set
+
+#
+# Debug facilities
+#
+CT_DEBUG_duma=y
+CT_DUMA_SO=y
+CT_DUMA_CUSTOM_WRAPPER=y
+CT_DUMA_V_2_5_15=y
+CT_DUMA_VERSION="2_5_15"
+CT_DEBUG_gdb=y
+CT_GDB_CROSS=y
+# CT_GDB_CROSS_STATIC is not set
+# CT_GDB_CROSS_SIM is not set
+# CT_GDB_CROSS_PYTHON is not set
+CT_GDB_CROSS_EXTRA_CONFIG_ARRAY=""
+# CT_GDB_NATIVE is not set
+CT_GDB_GDBSERVER=y
+CT_GDB_GDBSERVER_HAS_IPA_LIB=y
+# CT_GDB_GDBSERVER_BUILD_IPA_LIB is not set
+
+#
+# gdb version
+#
+CT_GDB_VERSION="7.12.1"
+CT_GDB_V_7_12_1=y
+# CT_GDB_V_7_11_1 is not set
+CT_GDB_7_12_or_later=y
+CT_GDB_7_2_or_later=y
+CT_GDB_7_0_or_later=y
+CT_GDB_HAS_PKGVERSION_BUGURL=y
+CT_GDB_HAS_PYTHON=y
+CT_GDB_INSTALL_GDBINIT=y
+# CT_DEBUG_ltrace is not set
+# CT_DEBUG_strace is not set
+
+#
+# Companion libraries
+#
+CT_COMPLIBS_NEEDED=y
+CT_GMP_NEEDED=y
+CT_MPFR_NEEDED=y
+CT_ISL_NEEDED=y
+CT_MPC_NEEDED=y
+CT_EXPAT_NEEDED=y
+CT_NCURSES_NEEDED=y
+CT_COMPLIBS=y
+# CT_LIBICONV is not set
+# CT_GETTEXT is not set
+CT_GMP=y
+CT_MPFR=y
+CT_ISL=y
+CT_MPC=y
+CT_EXPAT=y
+CT_NCURSES=y
+# CT_ZLIB is not set
+CT_GMP_V_6_1_2=y
+CT_GMP_5_0_2_or_later=y
+CT_GMP_VERSION="6.1.2"
+CT_MPFR_V_3_1_5=y
+CT_MPFR_VERSION="3.1.5"
+CT_ISL_V_0_16_1=y
+# CT_ISL_V_0_15 is not set
+CT_ISL_V_0_16_or_later=y
+CT_ISL_V_0_15_or_later=y
+CT_ISL_V_0_14_or_later=y
+CT_ISL_V_0_12_or_later=y
+CT_ISL_VERSION="0.16.1"
+CT_MPC_V_1_0_3=y
+CT_MPC_VERSION="1.0.3"
+CT_EXPAT_V_2_2_0=y
+CT_EXPAT_VERSION="2.2.0"
+CT_NCURSES_V_6_0=y
+CT_NCURSES_VERSION="6.0"
+CT_NCURSES_HOST_CONFIG_ARGS=""
+CT_NCURSES_HOST_DISABLE_DB=y
+CT_NCURSES_HOST_FALLBACKS="linux,xterm,xterm-color,xterm-256color,vt100"
+CT_NCURSES_TARGET_CONFIG_ARGS=""
+# CT_NCURSES_TARGET_DISABLE_DB is not set
+CT_NCURSES_TARGET_FALLBACKS=""
+
+#
+# Companion libraries common options
+#
+# CT_COMPLIBS_CHECK is not set
+
+#
+# Companion tools
+#
+# CT_COMP_TOOLS_FOR_HOST is not set
+# CT_COMP_TOOLS_autoconf is not set
+# CT_COMP_TOOLS_automake is not set
+# CT_COMP_TOOLS_libtool is not set
+# CT_COMP_TOOLS_m4 is not set
+# CT_COMP_TOOLS_make is not set