Convert gcc to new framework.

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

2 files changed, 351 insertions, 528 deletions

diff --git a/config/cc/gcc.in b/config/cc/gcc.in
index d86a300..a87b7db 100644
--- a/config/cc/gcc.in
+++ b/config/cc/gcc.in
@@ -14,203 +14,413 @@
 ## help gcc supports many languages, a powerful code parser, optimised binary
 ## help output, and lots of other features.
 
-config CC_GCC_CUSTOM
+source "config/versions/gcc.in"
+
+# Only enable gcc's support for plugins if binutils has it as well
+# They are useful only when doing LTO, but it does no harm enabling
+# them even without LTO.
+config CC_GCC_ENABLE_PLUGINS
+    bool
+    depends on BINUTILS_PLUGINS
+    depends on ! STATIC_TOOLCHAIN
+    default y
+
+# If binutils installs gold, enable support for gold in gcc
+config CC_GCC_GOLD
+    bool
+    depends on BINUTILS_GOLD_INSTALLED
+    default y
+
+config CC_GCC_HAS_LIBMPX
+    depends on GCC_V_5_4_0_or_later || GCC_LINARO_V_5_4_2017_01_or_later
     bool
-    prompt "Custom gcc"
-    depends on EXPERIMENTAL
-    select CC_GCC_latest
-    help
-      The choosen gcc version shall be not downloaded. Instead use
-      a custom location to get the source.
 
-if CC_GCC_CUSTOM
+config CC_LANG_JAVA_USE_ECJ
+    bool
+    default y
+    depends on CC_LANG_JAVA
 
-config CC_GCC_CUSTOM_LOCATION
+config CC_GCC_ENABLE_CXX_FLAGS
     string
-    prompt "Full path to custom gcc source"
+    prompt "Flags to pass to --enable-cxx-flags"
+    default ""
     help
-      Enter the path to the directory or tarball of your source for gcc.
-
-      If the path is a tarball, it should extract to: <name>-<version>/
-      where the name is this component, gcc, and the version is set
-      below in the custom version string.
+      Enter here the value of the gcc's ./configure option --enable-cxx-flags.
+      Leave empty if you don't know better.
+      
+      Note: just pass in the option _value_, that is only the part that goes
+      after the '=' sign.
 
-config CC_GCC_CUSTOM_VERSION
+config CC_GCC_CORE_EXTRA_CONFIG_ARRAY
     string
-    prompt "Custom GCC Version"
+    prompt "Core gcc extra config"
+    default ""
+    depends on CC_CORE_PASS_1_NEEDED || CC_CORE_PASS_2_NEEDED
     help
-      Enter the version number for your custom gcc.
-
-config CC_GCC_VERSION
+      Extra flags to pass onto ./configure when configuring the core gcc.
+      
+      The core gcc is a stripped down, C-only compiler needed to build
+      the C library. Kinda bootstrap gcc, if you wish.
+      
+      You can enter multiple arguments here, and arguments can contain spaces
+      if they are properly quoted (or escaped, but prefer quotes). Eg.:
+          --with-foo="1st arg with 4 spaces" --with-bar=2nd-arg-without-space
+
+config CC_GCC_EXTRA_CONFIG_ARRAY
     string
-    default CC_GCC_CUSTOM_VERSION
+    prompt "gcc extra config"
+    default ""
+    help
+      Extra flags to pass onto ./configure when configuring gcc.
+      
+      You can enter multiple arguments here, and arguments can contain spaces
+      if they are properly quoted (or escaped, but prefer quotes). Eg.:
+          --with-foo="1st arg with 4 spaces" --with-bar=2nd-arg-without-space
 
-endif #CC_GCC_CUSTOM
+config CC_GCC_MULTILIB_LIST
+    string
+    prompt "List of multilib variants"
+    depends on MULTILIB
+    help
+      Architecture-specific option of expanding or restricting the list of
+      the multilib variants to be built. Refer to GCC installation manual
+      for the format of this option for a particular architecture.
+      Leave empty to use the default list for this architecture.
 
-if ! CC_GCC_CUSTOM
+config STATIC_TOOLCHAIN
+    bool
+    select CC_GCC_STATIC_LIBSTDCXX
 
-config CC_GCC_SHOW_LINARO
+config CC_GCC_STATIC_LIBSTDCXX
     bool
-    prompt "Show Linaro versions"
+    prompt "Link libstdc++ statically into the gcc binary"
+    default y
+    depends on CONFIGURE_has_static_link || CANADIAN || CROSS_NATIVE
+    select WANTS_STATIC_LINK if CROSS || NATIVE
+    select WANTS_STATIC_LINK_CXX if CROSS || NATIVE
     help
-      Linaro is maintaining some advanced/more stable/experimental versions
-      of gcc, especially for the ARM architecture.
-
-      Those versions have not been blessed by the gcc comunity (nor have they
-      been cursed either!), but they look to be pretty much stable, and even
-      more stable than the upstream versions. YMMV...
+      Newer gcc versions require some c++ libraries. So statically
+      linking libstdc++ increases the likeliness that the gcc binary will
+      run on machines other than the one which it was built on, without
+      having to worry about distributing the matching version of libstdc++
+      along with it.
 
-      If you do not know what this Linaro stuff is, then simply say 'n' here,
-      and rest in peace. OTOH, if you know what you are doing, you will be
-      able to use and enjoy :-) the Linaro versions by saying 'y' here.
-
-      Linaro: http://www.linaro.org/
-
-choice
+config CC_GCC_SYSTEM_ZLIB
     bool
-    prompt "gcc version"
+    prompt "Use system zlib"
+    help
+      Do not use bundled zlib, and use the zlib already available for
+      the host (eg. the system library).
+
+      If zlib is built as a companion library, selecting this option
+      will use it.
+      
+      If you want to build a static toolchain, you will need to also
+      install the static version of zlib for your host.
+      
+      If unsure, say 'n'.
+
+config CC_GCC_CONFIG_TLS
+    tristate
+    prompt "Configure TLS (Thread Local Storage)"
+    default m
+    help
+      Specify that the target supports TLS (Thread Local Storage). Usually
+      configure can correctly determine if TLS is supported. In cases where
+      it guesses incorrectly, TLS can be explicitly enabled or disabled.
+      This can happen if the assembler supports TLS but the C library does
+      not, or if the assumptions made by the configure test are incorrect.
+
+       Option  | TLS use            | Associated ./configure switch
+      ---------+--------------------+--------------------------------
+         Y     | forcibly used      | --enable-tls
+         M     | auto               | (none, ./configure decides)
+         N     | forcibly not used  | --disable-tls
+      
+      If unsure, say 'M'.
+
+#-----------------------------------------------------------------------------
+# Optimisation features
+
+comment "Optimisation features"
+
+# Defined in config/cc/gcc.in
+# For graphite: gcc needs cloog and isl
+# In >= gcc-5.x, cloog is no longer needed, but isl is.
+# Prompt in config/cc/gcc.in.2
+config CC_GCC_USE_GRAPHITE
+    bool "Enable GRAPHITE loop optimisations"
+    default y
+    select CLOOG_NEEDED if !CC_GCC_5_or_later
+    select ISL_NEEDED
+    help
+      Enable the GRAPHITE loop optimsations.
+      
+      On some systems (eg. Cygwin), CLooG and ISL (required to enable
+      GRAPHITE) may not build properly (yet), so you'll have to say 'N'
+      here (or help debug the issues)
+
+      TODO: Is this still true on Cygwin?
+
+# The way LTO works is a bit twisted.
+# See: http://gcc.gnu.org/wiki/LinkTimeOptimization#Requirements
+# Basically:
+#   - if binutils has plugins: LTO is handled by ld/gold by loading
+#     the plugin when linking
+#   - if binutils does not have plugins: LTO is handled by collect2
+# In any case, LTO support does not depend on plugins, but takes
+# advantage of it
+config CC_GCC_USE_LTO
+    bool "Enable LTO"
+    default y
+    depends on ! STATIC_TOOLCHAIN
+    help
+      Enable the Link Time Optimisations.
 
-# Don't remove next line
-# CT_INSERT_VERSION_BELOW
+#-----------------------------------------------------------------------------
+comment "Settings for libraries running on target"
 
-config CC_GCC_V_7_1_0
+config CC_GCC_ENABLE_TARGET_OPTSPACE
     bool
-    prompt "7.1.0"
-    select CC_GCC_7
+    prompt "Optimize gcc libs for size"
+    default y
+    help
+      Pass --enable-target-optspace to crossgcc's configure.
+      
+      This will compile crossgcc's libs with -Os.
 
-config CC_GCC_V_linaro_6_3
+config CC_GCC_LIBMUDFLAP
     bool
-    prompt "linaro-6.3-2017.05"
-    depends on CC_GCC_SHOW_LINARO
-    select CC_GCC_6
-
-config CC_GCC_V_6_3_0
+    prompt "Compile libmudflap"
+    help
+      libmudflap is a pointer-use checking tool, which can detect
+      various mis-usages of pointers in C and (to some extents) C++.
+      
+      You should say 'N' here, as libmduflap generates instrumented
+      code (thus it is a bit bigger and a bit slower) and requires
+      re-compilation and re-link, while it exists better run-time
+      alternatives (eg. DUMA, dmalloc...) that need neither re-
+      compilation nor re-link.
+
+config CC_GCC_LIBGOMP
     bool
-    prompt "6.3.0"
-    select CC_GCC_6
+    prompt "Compile libgomp"
+    depends on !THREADS_NONE
+    help
+      libgomp is "the GNU implementation of the OpenMP Application Programming
+      Interface (API) for multi-platform shared-memory parallel programming in
+      C/C++ and Fortran". See:
+        http://gcc.gnu.org/onlinedocs/libgomp/
 
-config CC_GCC_V_linaro_5_4
-    bool
-    prompt "linaro-5.4-2017.05"
-    depends on CC_GCC_SHOW_LINARO
-    select CC_GCC_5
+      GNU OpenMP support requires threading.
 
-config CC_GCC_V_5_4_0
-    bool
-    prompt "5.4.0"
-    select CC_GCC_5
+      The default is 'N'. Say 'Y' if you need it, and report success/failure.
 
-config CC_GCC_V_linaro_4_9
+config CC_GCC_LIBSSP
     bool
-    prompt "linaro-4.9-2017.01"
-    depends on CC_GCC_SHOW_LINARO
-    select CC_GCC_4_9
+    prompt "Compile libssp"
+    help
+      libssp is the run-time Stack-Smashing Protection library.
+      
+      The default is 'N'. Say 'Y' if you need it, and report success/failure.
 
-config CC_GCC_V_4_9_4
+config CC_GCC_LIBQUADMATH
     bool
-    prompt "4.9.4"
-    select CC_GCC_4_9
+    prompt "Compile libquadmath"
+    help
+      libquadmath is a library which provides quad-precision mathematical
+      functions on targets supporting the __float128 datatype. See:
+        http://gcc.gnu.org/onlinedocs/libquadmath/
+      
+      The default is 'N'. Say 'Y' if you need it, and report success/failure.
 
-config CC_GCC_V_linaro_4_8
+config CC_GCC_LIBSANITIZER
     bool
-    prompt "linaro-4.8-2015.06 (OBSOLETE)"
-    depends on CC_GCC_SHOW_LINARO
-    depends on OBSOLETE
-    select CC_GCC_4_8
+    prompt "Compile libsanitizer"
+    depends on THREADS_NATIVE
+    depends on ! LIBC_uClibc && ! LIBC_musl # Currently lacks required headers (like netrom.h)
+    help
+      libsanitizer is a library which provides run-time sanitising of either
+      or both of:
+        - memory access patterns (out-of-bonds, use-after-free)
+        - racy data accesses (in multi-threaded programs)
 
-config CC_GCC_V_4_8_5
-    bool
-    prompt "4.8.5 (OBSOLETE)"
-    select CC_GCC_4_8
-    depends on OBSOLETE
+      The default is 'N'. Say 'Y' if you need it, and report success/failure.
 
-endchoice
+config CC_GCC_LIBMPX
+    bool
+    default y
+    prompt "Compile libmpx"
+    depends on CC_GCC_HAS_LIBMPX
+    depends on ARCH_x86
+    # MUSL does not define libc types that GCC requires. Mingw lacks certain headers.
+    depends on !LIBC_musl && ! LIBC_mingw
+    help
+      Enable GCC support for Intel Memory Protection Extensions (MPX).
 
-endif # ! CC_GCC_CUSTOM
+#-----------------------------------------------------------------------------
 
-config CC_GCC_4_8
-    bool
-    select CC_GCC_4_8_or_later
+comment "Misc. obscure options."
 
-config CC_GCC_4_8_or_later
+config CC_CXA_ATEXIT
     bool
+    prompt "Use __cxa_atexit"
+    default y
+    depends on ! BARE_METAL || LIBC_PROVIDES_CXA_ATEXIT
+    help
+      If you get the missing symbol "__cxa_atexit" when building C++ programs,
+      you might want to try disabling this option.
 
-config CC_GCC_4_9
+config CC_GCC_DISABLE_PCH
     bool
-    select CC_GCC_4_9_or_later
-
-config CC_GCC_4_9_or_later
+    prompt "Do not build PCH"
+    help
+      Say 'y' here to not use Pre-Compiled Headers in the resulting toolchain.
+      at the expense of speed when compiling C++ code.
+      
+      For some configurations (most notably canadian?), PCH are broken, and
+      need to be disabled. Please see:
+        http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40974
+
+config CC_GCC_SJLJ_EXCEPTIONS
+    tristate
+    prompt "Use sjlj for exceptions"
+    depends on ! BARE_METAL
+    default m
+    help
+      'sjlj' is short for setjmp/longjmp.
+      
+      On some architectures, stack unwinding during exception handling
+      works perfectly well without using sjlj, while on some others,
+      use of sjlj is required for proper stack unwinding.
+      
+       Option  | sjlj use           | Associated ./configure switch
+      ---------+--------------------+--------------------------------
+         Y     | forcibly used      | --enable-sjlj-exceptions
+         M     | auto               | (none, ./configure decides)
+         N     | forcibly not used  | --disable-sjlj-exceptions
+      
+      It should be safe to say 'M' or 'N'.
+      
+      It can happen that ./configure is wrong in some cases. Known
+      case is for ARM big endian, where you should say 'N'.
+
+config CC_GCC_LDBL_128
+    tristate
+    prompt "Enable 128-bit long doubles"
+    default m
+    help
+      Saying 'Y' will force gcc to use 128-bit wide long doubles
+      Saying 'N' will force gcc to use 64-bit wide long doubles
+      Saying 'M' will let gcc choose (default is 128-bit for
+                 glibc >= 2.4, 64-bit otherwise)
+      
+      If in doubt, keep the default, ie. 'M'.
+
+config CC_GCC_BUILD_ID
     bool
-    select CC_GCC_4_8_or_later
-
-config CC_GCC_5
+    prompt "Enable build-id"
+    help
+      Tells GCC to pass --build-id option to the linker for all final
+      links (links performed without the -r or --relocatable option),
+      if the linker supports it. If you say 'y' here, but your linker
+      does not support --build-id option, a warning is issued and this
+      option is ignored.
+      
+      The default is off.
+
+choice CC_GCC_LNK_HASH_STYLE_CHOICE
     bool
-    select CC_GCC_5_or_later
+    prompt "linker hash style"
+    depends on BINUTILS_HAS_HASH_STYLE
 
-config CC_GCC_5_or_later
+config CC_GCC_LNK_HASH_STYLE_DEFAULT
     bool
-    select CC_GCC_4_9_or_later
-    select CC_GCC_HAS_LIBMPX
+    prompt "Default"
+    help
+      Do not specify any value, and use the default value (sysv).
 
-config CC_GCC_6
+config CC_GCC_LNK_HASH_STYLE_SYSV
     bool
-    select CC_GCC_6_or_later
+    prompt "sysv"
+    help
+      Force use of the SYSV hash style.
 
-config CC_GCC_6_or_later
+config CC_GCC_LNK_HASH_STYLE_GNU
     bool
-    select CC_GCC_5_or_later
+    prompt "gnu"
+    help
+      Force use of the GNU hash style.
 
-config CC_GCC_7
+config CC_GCC_LNK_HASH_STYLE_BOTH
     bool
-    select CC_GCC_7_or_later
+    prompt "both"
+    help
+      Force use of both hash styles.
 
-config CC_GCC_7_or_later
-    bool
-    select CC_GCC_6_or_later
+endchoice # CC_GCC_LNK_HASH_STYLE_CHOICE
 
-config CC_GCC_latest
-    bool
-    select CC_GCC_7_or_later
+config CC_GCC_LNK_HASH_STYLE
+    string
+    default ""      if CC_GCC_LNK_HASH_STYLE_DEFAULT
+    default "sysv"  if CC_GCC_LNK_HASH_STYLE_SYSV
+    default "gnu"   if CC_GCC_LNK_HASH_STYLE_GNU
+    default "both"  if CC_GCC_LNK_HASH_STYLE_BOTH
+
+choice CC_GCC_DEC_FLOATS_CHOICE
+    bool "Decimal floats"
+    default CC_GCC_DEC_FLOATS_AUTO
+    help
+      Choose what type of decimal floats to support.
+      
+      Note that using decimal floats requires a C library that provides
+      support for fenv (namely, the fenv.h header).  This is the case
+      for (e)glibc, and uClibc on x86/32.  For other C libraries, or
+      uClibc on other archs, this might not be the case, so you should
+      disable support for decimal floats.
+      
+      The default is to let ./configure decide.
+
+config CC_GCC_DEC_FLOAT_AUTO
+    bool "auto"
+    help
+      Let ./configure decide. If you say 'y' here, gcc will default to:
+        - 'bid' for x86 (32- and 64-bit)
+        - 'dpd' for powerpc
+        - 'no' for the other architectures
 
-# Only enable gcc's support for plugins if binutils has it as well
-# They are useful only when doing LTO, but it does no harm enabling
-# them even without LTO.
-config CC_GCC_ENABLE_PLUGINS
-    bool
-    depends on BINUTILS_PLUGINS
-    depends on ! STATIC_TOOLCHAIN
-    default y
+config CC_GCC_DEC_FLOAT_BID
+    bool "bid"
+    help
+      Use the 'binary integer decimal' format for decimal floats.
 
-# If binutils installs gold, enable support for gold in gcc
-config CC_GCC_GOLD
-    bool
-    depends on BINUTILS_GOLD_INSTALLED
-    default y
+config CC_GCC_DEC_FLOAT_DPD
+    bool "dpd"
+    help
+      Use the 'densely packed decimal' for decimal floats.
 
-config CC_GCC_HAS_LIBMPX
-    bool
+config CC_GCC_DEC_FLOATS_NO
+    bool "no"
+    help
+      Do not support decimal floats. The default.
 
-if ! CC_GCC_CUSTOM
+endchoice # CC_GCC_DEC_FLOATS_CHOICE
 
-config CC_GCC_VERSION
+config CC_GCC_DEC_FLOATS
     string
-# Don't remove next line
-# CT_INSERT_VERSION_STRING_BELOW
-    default "7.1.0" if CC_GCC_V_7_1_0
-    default "linaro-6.3-2017.05" if CC_GCC_V_linaro_6_3
-    default "6.3.0" if CC_GCC_V_6_3_0
-    default "linaro-5.4-2017.05" if CC_GCC_V_linaro_5_4
-    default "5.4.0" if CC_GCC_V_5_4_0
-    default "linaro-4.9-2017.01" if CC_GCC_V_linaro_4_9
-    default "4.9.4" if CC_GCC_V_4_9_4
-    default "linaro-4.8-2015.06" if CC_GCC_V_linaro_4_8
-    default "4.8.5" if CC_GCC_V_4_8_5
-
-endif # ! CC_GCC_CUSTOM
+    default ""      if CC_GCC_DEC_FLOATS_AUTO
+    default "bid"   if CC_GCC_DEC_FLOATS_BID
+    default "dpd"   if CC_GCC_DEC_FLOATS_DPD
+    default "no"    if CC_GCC_DEC_FLOATS_NO
 
-config CC_LANG_JAVA_USE_ECJ
+#-----------------------------------------------------------------------------
+
+config CC_GCC_HAS_ARCH_OPTIONS
     bool
-    default y
-    depends on CC_LANG_JAVA
 
-source "config/cc/gcc.in.2"
+comment "archictecture-specific options"
+    depends on CC_GCC_HAS_ARCH_OPTIONS
+
+if ARCH_mips
+source "config/cc/gcc.in.mips"
+endif # ARCH_mips
diff --git a/config/cc/gcc.in.2 b/config/cc/gcc.in.2
deleted file mode 100644
index 79a6225..0000000
--- a/config/cc/gcc.in.2
+++ /dev/null
@@ -1,387 +0,0 @@
-# gcc configuration options
-
-config CC_GCC_ENABLE_CXX_FLAGS
-    string
-    prompt "Flags to pass to --enable-cxx-flags"
-    default ""
-    help
-      Enter here the value of the gcc's ./configure option --enable-cxx-flags.
-      Leave empty if you don't know better.
-      
-      Note: just pass in the option _value_, that is only the part that goes
-      after the '=' sign.
-
-config CC_GCC_CORE_EXTRA_CONFIG_ARRAY
-    string
-    prompt "Core gcc extra config"
-    default ""
-    depends on CC_CORE_PASS_1_NEEDED || CC_CORE_PASS_2_NEEDED
-    help
-      Extra flags to pass onto ./configure when configuring the core gcc.
-      
-      The core gcc is a stripped down, C-only compiler needed to build
-      the C library. Kinda bootstrap gcc, if you wish.
-      
-      You can enter multiple arguments here, and arguments can contain spaces
-      if they are properly quoted (or escaped, but prefer quotes). Eg.:
-          --with-foo="1st arg with 4 spaces" --with-bar=2nd-arg-without-space
-
-config CC_GCC_EXTRA_CONFIG_ARRAY
-    string
-    prompt "gcc extra config"
-    default ""
-    help
-      Extra flags to pass onto ./configure when configuring gcc.
-      
-      You can enter multiple arguments here, and arguments can contain spaces
-      if they are properly quoted (or escaped, but prefer quotes). Eg.:
-          --with-foo="1st arg with 4 spaces" --with-bar=2nd-arg-without-space
-
-config CC_GCC_MULTILIB_LIST
-    string
-    prompt "List of multilib variants"
-    depends on MULTILIB
-    help
-      Architecture-specific option of expanding or restricting the list of
-      the multilib variants to be built. Refer to GCC installation manual
-      for the format of this option for a particular architecture.
-      Leave empty to use the default list for this architecture.
-
-config STATIC_TOOLCHAIN
-    bool
-    select CC_GCC_STATIC_LIBSTDCXX
-
-config CC_GCC_STATIC_LIBSTDCXX
-    bool
-    prompt "Link libstdc++ statically into the gcc binary"
-    default y
-    depends on CONFIGURE_has_static_link || CANADIAN || CROSS_NATIVE
-    select WANTS_STATIC_LINK if CROSS || NATIVE
-    select WANTS_STATIC_LINK_CXX if CROSS || NATIVE
-    help
-      Newer gcc versions require some c++ libraries. So statically
-      linking libstdc++ increases the likeliness that the gcc binary will
-      run on machines other than the one which it was built on, without
-      having to worry about distributing the matching version of libstdc++
-      along with it.
-
-config CC_GCC_SYSTEM_ZLIB
-    bool
-    prompt "Use system zlib"
-    help
-      Do not use bundled zlib, and use the zlib already available for
-      the host (eg. the system library).
-
-      If zlib is built as a companion library, selecting this option
-      will use it.
-      
-      If you want to build a static toolchain, you will need to also
-      install the static version of zlib for your host.
-      
-      If unsure, say 'n'.
-
-config CC_GCC_CONFIG_TLS
-    tristate
-    prompt "Configure TLS (Thread Local Storage)"
-    depends on !LIBC_bionic
-    default m
-    help
-      Specify that the target supports TLS (Thread Local Storage). Usually
-      configure can correctly determine if TLS is supported. In cases where
-      it guesses incorrectly, TLS can be explicitly enabled or disabled.
-      This can happen if the assembler supports TLS but the C library does
-      not, or if the assumptions made by the configure test are incorrect.
-
-       Option  | TLS use            | Associated ./configure switch
-      ---------+--------------------+--------------------------------
-         Y     | forcibly used      | --enable-tls
-         M     | auto               | (none, ./configure decides)
-         N     | forcibly not used  | --disable-tls
-      
-      If unsure, say 'M'.
-
-#-----------------------------------------------------------------------------
-# Optimisation features
-
-comment "Optimisation features"
-
-# Defined in config/cc/gcc.in
-# For graphite: gcc needs cloog and isl
-# In >= gcc-5.x, cloog is no longer needed, but isl is.
-# Prompt in config/cc/gcc.in.2
-config CC_GCC_USE_GRAPHITE
-    bool "Enable GRAPHITE loop optimisations"
-    default y
-    select CLOOG_NEEDED if !CC_GCC_5_or_later
-    select ISL_NEEDED
-    help
-      Enable the GRAPHITE loop optimsations.
-      
-      On some systems (eg. Cygwin), CLooG and ISL (required to enable
-      GRAPHITE) may not build properly (yet), so you'll have to say 'N'
-      here (or help debug the issues)
-
-      TODO: Is this still true on Cygwin?
-
-# The way LTO works is a bit twisted.
-# See: http://gcc.gnu.org/wiki/LinkTimeOptimization#Requirements
-# Basically:
-#   - if binutils has plugins: LTO is handled by ld/gold by loading
-#     the plugin when linking
-#   - if binutils does not have plugins: LTO is handled by collect2
-# In any case, LTO support does not depend on plugins, but takes
-# advantage of it
-config CC_GCC_USE_LTO
-    bool "Enable LTO"
-    default y
-    depends on ! STATIC_TOOLCHAIN
-    help
-      Enable the Link Time Optimisations.
-
-#-----------------------------------------------------------------------------
-comment "Settings for libraries running on target"
-
-config CC_GCC_ENABLE_TARGET_OPTSPACE
-    bool
-    prompt "Optimize gcc libs for size"
-    default y
-    help
-      Pass --enable-target-optspace to crossgcc's configure.
-      
-      This will compile crossgcc's libs with -Os.
-
-config CC_GCC_LIBMUDFLAP
-    bool
-    prompt "Compile libmudflap"
-    help
-      libmudflap is a pointer-use checking tool, which can detect
-      various mis-usages of pointers in C and (to some extents) C++.
-      
-      You should say 'N' here, as libmduflap generates instrumented
-      code (thus it is a bit bigger and a bit slower) and requires
-      re-compilation and re-link, while it exists better run-time
-      alternatives (eg. DUMA, dmalloc...) that need neither re-
-      compilation nor re-link.
-
-config CC_GCC_LIBGOMP
-    bool
-    prompt "Compile libgomp"
-    depends on !THREADS_NONE
-    help
-      libgomp is "the GNU implementation of the OpenMP Application Programming
-      Interface (API) for multi-platform shared-memory parallel programming in
-      C/C++ and Fortran". See:
-        http://gcc.gnu.org/onlinedocs/libgomp/
-
-      GNU OpenMP support requires threading.
-
-      The default is 'N'. Say 'Y' if you need it, and report success/failure.
-
-config CC_GCC_LIBSSP
-    bool
-    prompt "Compile libssp"
-    help
-      libssp is the run-time Stack-Smashing Protection library.
-      
-      The default is 'N'. Say 'Y' if you need it, and report success/failure.
-
-config CC_GCC_LIBQUADMATH
-    bool
-    prompt "Compile libquadmath"
-    help
-      libquadmath is a library which provides quad-precision mathematical
-      functions on targets supporting the __float128 datatype. See:
-        http://gcc.gnu.org/onlinedocs/libquadmath/
-      
-      The default is 'N'. Say 'Y' if you need it, and report success/failure.
-
-config CC_GCC_LIBSANITIZER
-    bool
-    prompt "Compile libsanitizer"
-    depends on THREADS_NATIVE
-    depends on ! LIBC_uClibc && ! LIBC_musl # Currently lacks required headers (like netrom.h)
-    help
-      libsanitizer is a library which provides run-time sanitising of either
-      or both of:
-        - memory access patterns (out-of-bonds, use-after-free)
-        - racy data accesses (in multi-threaded programs)
-
-      The default is 'N'. Say 'Y' if you need it, and report success/failure.
-
-config CC_GCC_LIBMPX
-    bool
-    default y
-    prompt "Compile libmpx"
-    depends on CC_GCC_HAS_LIBMPX
-    depends on ARCH_x86
-    # MUSL does not define libc types that GCC requires. Mingw lacks certain headers.
-    depends on !LIBC_musl && ! LIBC_mingw
-    help
-      Enable GCC support for Intel Memory Protection Extensions (MPX).
-
-#-----------------------------------------------------------------------------
-
-comment "Misc. obscure options."
-
-config CC_CXA_ATEXIT
-    bool
-    prompt "Use __cxa_atexit"
-    default y
-    depends on ! BARE_METAL || LIBC_PROVIDES_CXA_ATEXIT
-    help
-      If you get the missing symbol "__cxa_atexit" when building C++ programs,
-      you might want to try disabling this option.
-
-config CC_GCC_DISABLE_PCH
-    bool
-    prompt "Do not build PCH"
-    help
-      Say 'y' here to not use Pre-Compiled Headers in the resulting toolchain.
-      at the expense of speed when compiling C++ code.
-      
-      For some configurations (most notably canadian?), PCH are broken, and
-      need to be disabled. Please see:
-        http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40974
-
-config CC_GCC_SJLJ_EXCEPTIONS
-    tristate
-    prompt "Use sjlj for exceptions"
-    depends on ! BARE_METAL
-    default m
-    help
-      'sjlj' is short for setjmp/longjmp.
-      
-      On some architectures, stack unwinding during exception handling
-      works perfectly well without using sjlj, while on some others,
-      use of sjlj is required for proper stack unwinding.
-      
-       Option  | sjlj use           | Associated ./configure switch
-      ---------+--------------------+--------------------------------
-         Y     | forcibly used      | --enable-sjlj-exceptions
-         M     | auto               | (none, ./configure decides)
-         N     | forcibly not used  | --disable-sjlj-exceptions
-      
-      It should be safe to say 'M' or 'N'.
-      
-      It can happen that ./configure is wrong in some cases. Known
-      case is for ARM big endian, where you should say 'N'.
-
-config CC_GCC_LDBL_128
-    tristate
-    prompt "Enable 128-bit long doubles"
-    default m
-    help
-      Saying 'Y' will force gcc to use 128-bit wide long doubles
-      Saying 'N' will force gcc to use 64-bit wide long doubles
-      Saying 'M' will let gcc choose (default is 128-bit for
-                 glibc >= 2.4, 64-bit otherwise)
-      
-      If in doubt, keep the default, ie. 'M'.
-
-config CC_GCC_BUILD_ID
-    bool
-    prompt "Enable build-id"
-    help
-      Tells GCC to pass --build-id option to the linker for all final
-      links (links performed without the -r or --relocatable option),
-      if the linker supports it. If you say 'y' here, but your linker
-      does not support --build-id option, a warning is issued and this
-      option is ignored.
-      
-      The default is off.
-
-choice CC_GCC_LNK_HASH_STYLE_CHOICE
-    bool
-    prompt "linker hash style"
-    depends on BINUTILS_HAS_HASH_STYLE
-
-config CC_GCC_LNK_HASH_STYLE_DEFAULT
-    bool
-    prompt "Default"
-    help
-      Do not specify any value, and use the default value (sysv).
-
-config CC_GCC_LNK_HASH_STYLE_SYSV
-    bool
-    prompt "sysv"
-    help
-      Force use of the SYSV hash style.
-
-config CC_GCC_LNK_HASH_STYLE_GNU
-    bool
-    prompt "gnu"
-    help
-      Force use of the GNU hash style.
-
-config CC_GCC_LNK_HASH_STYLE_BOTH
-    bool
-    prompt "both"
-    help
-      Force use of both hash styles.
-
-endchoice # CC_GCC_LNK_HASH_STYLE_CHOICE
-
-config CC_GCC_LNK_HASH_STYLE
-    string
-    default ""      if CC_GCC_LNK_HASH_STYLE_DEFAULT
-    default "sysv"  if CC_GCC_LNK_HASH_STYLE_SYSV
-    default "gnu"   if CC_GCC_LNK_HASH_STYLE_GNU
-    default "both"  if CC_GCC_LNK_HASH_STYLE_BOTH
-
-choice CC_GCC_DEC_FLOATS_CHOICE
-    bool "Decimal floats"
-    default CC_GCC_DEC_FLOATS_AUTO
-    help
-      Choose what type of decimal floats to support.
-      
-      Note that using decimal floats requires a C library that provides
-      support for fenv (namely, the fenv.h header).  This is the case
-      for (e)glibc, and uClibc on x86/32.  For other C libraries, or
-      uClibc on other archs, this might not be the case, so you should
-      disable support for decimal floats.
-      
-      The default is to let ./configure decide.
-
-config CC_GCC_DEC_FLOAT_AUTO
-    bool "auto"
-    help
-      Let ./configure decide. If you say 'y' here, gcc will default to:
-        - 'bid' for x86 (32- and 64-bit)
-        - 'dpd' for powerpc
-        - 'no' for the other architectures
-
-config CC_GCC_DEC_FLOAT_BID
-    bool "bid"
-    help
-      Use the 'binary integer decimal' format for decimal floats.
-
-config CC_GCC_DEC_FLOAT_DPD
-    bool "dpd"
-    help
-      Use the 'densely packed decimal' for decimal floats.
-
-config CC_GCC_DEC_FLOATS_NO
-    bool "no"
-    help
-      Do not support decimal floats. The default.
-
-endchoice # CC_GCC_DEC_FLOATS_CHOICE
-
-config CC_GCC_DEC_FLOATS
-    string
-    default ""      if CC_GCC_DEC_FLOATS_AUTO
-    default "bid"   if CC_GCC_DEC_FLOATS_BID
-    default "dpd"   if CC_GCC_DEC_FLOATS_DPD
-    default "no"    if CC_GCC_DEC_FLOATS_NO
-
-#-----------------------------------------------------------------------------
-
-config CC_GCC_HAS_ARCH_OPTIONS
-    bool
-
-comment "archictecture-specific options"
-    depends on CC_GCC_HAS_ARCH_OPTIONS
-
-if ARCH_mips
-source "config/cc/gcc.in.mips"
-endif # ARCH_mips