scripts/build/cc/gcc.sh
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sun Mar 20 01:17:27 2011 +0100 (2011-03-20)
changeset 2355 e216439317bc
parent 2302 e85077497eb1
child 2360 811cf89e8161
permissions -rw-r--r--
cc/gcc: log even more

Also log variable assignement for single commands.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
     1 # This file adds the function to build the gcc C compiler
     2 # Copyright 2007 Yann E. MORIN
     3 # Licensed under the GPL v2. See COPYING in the root of this package
     4 
     5 # Download gcc
     6 do_cc_get() {
     7     local linaro_version
     8     local linaro_series
     9     local linaro_base_url="http://launchpad.net/gcc-linaro"
    10 
    11 
    12     # Account for the Linaro versioning
    13     linaro_version="$( echo "${CT_CC_VERSION}"      \
    14                        |sed -r -e 's/^linaro-//;'   \
    15                      )"
    16     linaro_series="$( echo "${linaro_version}"      \
    17                       |sed -r -e 's/-.*//;'         \
    18                     )"
    19 
    20     # Ah! gcc folks are kind of 'different': they store the tarballs in
    21     # subdirectories of the same name! That's because gcc is such /crap/ that
    22     # it is such /big/ that it needs being splitted for distribution! Sad. :-(
    23     # Arrgghh! Some of those versions does not follow this convention:
    24     # gcc-3.3.3 lives in releases/gcc-3.3.3, while gcc-2.95.* isn't in a
    25     # subdirectory! You bastard!
    26     CT_GetFile "gcc-${CT_CC_VERSION}"                                                       \
    27                {ftp,http}://ftp.gnu.org/gnu/gcc{,{,/releases}/gcc-${CT_CC_VERSION}}         \
    28                ftp://ftp.irisa.fr/pub/mirrors/gcc.gnu.org/gcc/releases/gcc-${CT_CC_VERSION} \
    29                ftp://ftp.uvsq.fr/pub/gcc/snapshots/${CT_CC_VERSION}                         \
    30                "${linaro_base_url}/${linaro_series}/${linaro_version}/+download"
    31 
    32     # Starting with GCC 4.3, ecj is used for Java, and will only be
    33     # built if the configure script finds ecj.jar at the top of the
    34     # GCC source tree, which will not be there unless we get it and
    35     # put it there ourselves
    36     if [ "${CT_CC_LANG_JAVA_USE_ECJ}" = "y" ]; then
    37         CT_GetFile ecj-latest .jar ftp://gcc.gnu.org/pub/java   \
    38                                    ftp://sourceware.org/pub/java
    39     fi
    40 }
    41 
    42 # Extract gcc
    43 do_cc_extract() {
    44     CT_Extract "gcc-${CT_CC_VERSION}"
    45     CT_Patch "gcc" "${CT_CC_VERSION}"
    46 
    47     # Copy ecj-latest.jar to ecj.jar at the top of the GCC source tree
    48     if [ "${CT_CC_LANG_JAVA_USE_ECJ}" = "y"                     \
    49          -a ! -f "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/ecj.jar"   \
    50        ]; then
    51         CT_DoExecLog ALL cp -v "${CT_TARBALLS_DIR}/ecj-latest.jar" "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/ecj.jar"
    52     fi
    53 }
    54 
    55 #------------------------------------------------------------------------------
    56 # Core gcc pass 1
    57 do_cc_core_pass_1() {
    58     # If we're building for bare metal, build the static core gcc,
    59     # with libgcc.
    60     # In case we're not bare metal and building a canadian compiler, do nothing
    61     # In case we're not bare metal, and we're NPTL, build the static core gcc.
    62     # In any other case, do nothing.
    63     case "${CT_BARE_METAL},${CT_CANADIAN},${CT_THREADS}" in
    64         y,*,*)  do_cc_core mode=static;;
    65         ,y,*)   ;;
    66         ,,nptl) do_cc_core mode=static;;
    67         *)      ;;
    68     esac
    69 }
    70 
    71 # Core gcc pass 2
    72 do_cc_core_pass_2() {
    73     # In case we're building for bare metal, do nothing, we already have
    74     # our compiler.
    75     # In case we're not bare metal and building a canadian compiler, do nothing
    76     # In case we're NPTL, build the shared core gcc and the target libgcc.
    77     # In any other case, build the static core gcc and, if using gcc-4.3+,
    78     # also build the target libgcc.
    79     case "${CT_BARE_METAL},${CT_CANADIAN},${CT_THREADS}" in
    80         y,*,*)
    81             if [ "${CT_STATIC_TOOLCHAIN}" = "y" ]; then
    82                 do_cc_core mode=baremetal build_libgcc=yes build_libstdcxx=yes build_staticlinked=yes
    83             else
    84                 do_cc_core mode=baremetal build_libgcc=yes build_libstdcxx=yes
    85             fi
    86             ;;
    87         ,y,*)   ;;
    88         ,,nptl)
    89             do_cc_core mode=shared build_libgcc=yes
    90             ;;
    91         ,,win32)
    92             do_cc_core mode=static build_libgcc=yes
    93             ;;
    94         *)  if [ "${CT_CC_GCC_4_3_or_later}" = "y" ]; then
    95                 do_cc_core mode=static build_libgcc=yes
    96             else
    97                 do_cc_core mode=static
    98             fi
    99             ;;
   100     esac
   101 }
   102 
   103 #------------------------------------------------------------------------------
   104 # Build core gcc
   105 # This function is used to build both the static and the shared core C conpiler,
   106 # with or without the target libgcc. We need to know wether:
   107 #  - we're building static, shared or bare metal: mode=[static|shared|baremetal]
   108 #  - we need to build libgcc or not             : build_libgcc=[yes|no]       (default: no)
   109 #  - we need to build libstdc++ or not          : build_libstdcxx=[yes|no]    (default: no)
   110 #  - we need to build statically linked or not  : build_staticlinked=[yes|no] (default: no)
   111 # Usage: do_cc_core mode=[static|shared|baremetal] build_libgcc=[yes|no] build_staticlinked=[yes|no]
   112 do_cc_core() {
   113     local mode
   114     local build_libgcc=no
   115     local build_libstdcxx=no
   116     local build_staticlinked=no
   117     local core_prefix_dir
   118     local lang_opt
   119     local tmp
   120     local -a extra_config
   121     local -a core_LDFLAGS
   122     local -a core_targets
   123 
   124     while [ $# -ne 0 ]; do
   125         eval "${1}"
   126         shift
   127     done
   128 
   129     lang_opt=c
   130     case "${mode}" in
   131         static)
   132             core_prefix_dir="${CT_CC_CORE_STATIC_PREFIX_DIR}"
   133             extra_config+=("--with-newlib")
   134             extra_config+=("--enable-threads=no")
   135             extra_config+=("--disable-shared")
   136             copy_headers=y  # For baremetal, as there's no headers to copy,
   137                             # we copy an empty directory. So, who cares?
   138             ;;
   139         shared)
   140             core_prefix_dir="${CT_CC_CORE_SHARED_PREFIX_DIR}"
   141             extra_config+=("--enable-shared")
   142             copy_headers=y
   143             ;;
   144         baremetal)
   145             core_prefix_dir="${CT_PREFIX_DIR}"
   146             extra_config+=("--with-newlib")
   147             extra_config+=("--enable-threads=no")
   148             extra_config+=("--disable-shared")
   149             [ "${CT_CC_LANG_CXX}" = "y" ] && lang_opt="${lang_opt},c++"
   150             copy_headers=n
   151             ;;
   152         *)
   153             CT_Abort "Internal Error: 'mode' must be one of: 'static', 'shared' or 'baremetal', not '${mode:-(empty)}'"
   154             ;;
   155     esac
   156 
   157     CT_DoStep INFO "Installing ${mode} core C compiler"
   158     mkdir -p "${CT_BUILD_DIR}/build-cc-core-${mode}"
   159     cd "${CT_BUILD_DIR}/build-cc-core-${mode}"
   160 
   161     # Bare metal delivers the core compiler as final compiler, so add version info and bugurl
   162     [ -n "${CT_CC_BUGURL}" ]     && extra_config+=("--with-bugurl=${CT_CC_BUGURL}")
   163     [ -n "${CT_CC_PKGVERSION}" ] && extra_config+=("--with-pkgversion=${CT_CC_PKGVERSION}")
   164 
   165     if [ "${copy_headers}" = "y" ]; then
   166         CT_DoLog DEBUG "Copying headers to install area of bootstrap gcc, so it can build libgcc2"
   167         CT_DoExecLog ALL cp -a "${CT_HEADERS_DIR}" "${core_prefix_dir}/${CT_TARGET}/include"
   168     fi
   169 
   170     CT_DoLog EXTRA "Configuring ${mode} core C compiler"
   171 
   172     for tmp in ARCH ABI CPU TUNE FPU FLOAT; do
   173         eval tmp="\${CT_ARCH_WITH_${tmp}}"
   174         if [ -n "${tmp}" ]; then
   175             extra_config+=("${tmp}")
   176         fi
   177     done
   178     if [ "${CT_CC_CXA_ATEXIT}" = "y" ]; then
   179         extra_config+=("--enable-__cxa_atexit")
   180     else
   181         extra_config+=("--disable-__cxa_atexit")
   182     fi
   183 
   184     # *** WARNING ! ***
   185     # Keep this full if-else-if-elif-fi-fi block in sync
   186     # with the same block in do_cc, below.
   187     if [ "${build_staticlinked}" = "yes" ]; then
   188         core_LDFLAGS+=("-static")
   189         extra_config+=("--with-host-libstdcxx=-static-libgcc -Wl,-Bstatic,-lstdc++ -lm")
   190         # Companion libraries are build static (eg !shared), so
   191         # the libstdc++ is not pulled automatically, although it
   192         # is needed. Shoe-horn it in our LDFLAGS
   193         # Ditto libm on some Fedora boxen
   194         final_LDFLAGS+=("-lstdc++")
   195         final_LDFLAGS+=("-lm")
   196     else
   197         if [ "${CT_CC_STATIC_LIBSTDCXX}" = "y" ]; then
   198             # this is from CodeSourcery arm-2010q1-202-arm-none-linux-gnueabi.src.tar.bz2
   199             # build script
   200             # FIXME: if the host gcc is gcc-4.5 then presumably we could use -static-libstdc++,
   201             # see http://gcc.gnu.org/ml/gcc-patches/2009-06/msg01635.html
   202             extra_config+=("--with-host-libstdcxx=-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm")
   203         elif [ "${CT_COMPLIBS_SHARED}" != "y" ]; then
   204             # When companion libraries are build static (eg !shared),
   205             # the libstdc++ is not pulled automatically, although it
   206             # is needed. Shoe-horn it in our LDFLAGS
   207             # Ditto libm on some Fedora boxen
   208             core_LDFLAGS+=("-lstdc++")
   209             core_LDFLAGS+=("-lm")
   210         fi
   211     fi
   212 
   213     if [ "${CT_CC_GCC_USE_GMP_MPFR}" = "y" ]; then
   214         extra_config+=("--with-gmp=${CT_COMPLIBS_DIR}")
   215         extra_config+=("--with-mpfr=${CT_COMPLIBS_DIR}")
   216     fi
   217     if [ "${CT_CC_GCC_USE_MPC}" = "y" ]; then
   218         extra_config+=("--with-mpc=${CT_COMPLIBS_DIR}")
   219     fi
   220     if [ "${CT_CC_GCC_USE_GRAPHITE}" = "y" ]; then
   221         extra_config+=("--with-ppl=${CT_COMPLIBS_DIR}")
   222         extra_config+=("--with-cloog=${CT_COMPLIBS_DIR}")
   223     elif [ "${CT_CC_GCC_HAS_GRAPHITE}" = "y" ]; then
   224         extra_config+=("--with-ppl=no")
   225         extra_config+=("--with-cloog=no")
   226     fi
   227     if [ "${CT_CC_GCC_USE_LTO}" = "y" ]; then
   228         extra_config+=("--with-libelf=${CT_COMPLIBS_DIR}")
   229         extra_config+=("--enable-lto")
   230     elif [ "${CT_CC_GCC_HAS_LTO}" = "y" ]; then
   231         extra_config+=("--with-libelf=no")
   232         extra_config+=("--disable-lto")
   233     fi
   234 
   235     if [ "${CT_CC_GCC_ENABLE_TARGET_OPTSPACE}" = "y" ]; then
   236         extra_config+=("--enable-target-optspace")
   237     fi
   238 
   239     case "${CT_CC_GCC_LDBL_128}" in
   240         y)  extra_config+=("--with-long-double-128");;
   241         m)  ;;
   242         "") extra_config+=("--without-long-double-128");;
   243     esac
   244 
   245     CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'"
   246 
   247     # Use --with-local-prefix so older gccs don't look in /usr/local (http://gcc.gnu.org/PR10532)
   248     CT_DoExecLog CFG                                \
   249     CC_FOR_BUILD="${CT_BUILD}-gcc"                  \
   250     CFLAGS="${CT_CFLAGS_FOR_HOST}"                  \
   251     LDFLAGS="${core_LDFLAGS[*]}"                    \
   252     "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/configure"  \
   253         --build=${CT_BUILD}                         \
   254         --host=${CT_HOST}                           \
   255         --target=${CT_TARGET}                       \
   256         --prefix="${core_prefix_dir}"               \
   257         --with-local-prefix="${CT_SYSROOT_DIR}"     \
   258         --disable-multilib                          \
   259         --disable-libmudflap                        \
   260         ${CC_CORE_SYSROOT_ARG}                      \
   261         "${extra_config[@]}"                        \
   262         --disable-nls                               \
   263         --enable-symvers=gnu                        \
   264         --enable-languages="${lang_opt}"            \
   265         ${CT_CC_CORE_EXTRA_CONFIG}
   266 
   267     if [ "${build_libgcc}" = "yes" ]; then
   268         # HACK: we need to override SHLIB_LC from gcc/config/t-slibgcc-elf-ver or
   269         # gcc/config/t-libunwind so -lc is removed from the link for
   270         # libgcc_s.so, as we do not have a target -lc yet.
   271         # This is not as ugly as it appears to be ;-) All symbols get resolved
   272         # during the glibc build, and we provide a proper libgcc_s.so for the
   273         # cross toolchain during the final gcc build.
   274         #
   275         # As we cannot modify the source tree, nor override SHLIB_LC itself
   276         # during configure or make, we have to edit the resultant
   277         # gcc/libgcc.mk itself to remove -lc from the link.
   278         # This causes us to have to jump through some hoops...
   279         #
   280         # To produce libgcc.mk to edit we firstly require libiberty.a,
   281         # so we configure then build it.
   282         # Next we have to configure gcc, create libgcc.mk then edit it...
   283         # So much easier if we just edit the source tree, but hey...
   284         if [ ! -f "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/gcc/BASE-VER" ]; then
   285             CT_DoExecLog CFG make configure-libiberty
   286             CT_DoExecLog ALL make ${JOBSFLAGS} -C libiberty libiberty.a
   287             CT_DoExecLog CFG make configure-gcc configure-libcpp
   288             CT_DoExecLog ALL make ${JOBSFLAGS} all-libcpp
   289         else
   290             CT_DoExecLog CFG make configure-gcc configure-libcpp configure-build-libiberty
   291             CT_DoExecLog ALL make ${JOBSFLAGS} all-libcpp all-build-libiberty
   292         fi
   293         # HACK: gcc-4.2 uses libdecnumber to build libgcc.mk, so build it here.
   294         if [ -d "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/libdecnumber" ]; then
   295             CT_DoExecLog CFG make configure-libdecnumber
   296             CT_DoExecLog ALL make ${JOBSFLAGS} -C libdecnumber libdecnumber.a
   297         fi
   298 
   299         # Starting with GCC 4.3, libgcc.mk is no longer built,
   300         # and libgcc.mvars is used instead.
   301 
   302         if [ "${CT_CC_GCC_4_3_or_later}" = "y" ]; then
   303             libgcc_rule="libgcc.mvars"
   304             core_targets=( gcc target-libgcc )
   305         else
   306             libgcc_rule="libgcc.mk"
   307             core_targets=( gcc )
   308         fi
   309 
   310         # On bare metal and canadian build the host-compiler is used when
   311         # actually the build-system compiler is required. Choose the correct
   312         # compilers for canadian build and use the defaults on other
   313         # configurations.
   314         if [ "${CT_BARE_METAL},${CT_CANADIAN}" = "y,y" ]; then
   315             repair_cc="CC_FOR_BUILD=${CT_BUILD}-gcc \
   316                        GCC_FOR_TARGET=${CT_TARGET}-gcc"
   317         else
   318             repair_cc=""
   319         fi
   320 
   321         CT_DoExecLog ALL make ${JOBSFLAGS} -C gcc ${libgcc_rule} \
   322                               ${repair_cc}
   323         sed -r -i -e 's@-lc@@g' gcc/${libgcc_rule}
   324     else # build_libgcc
   325         core_targets=( gcc )
   326     fi   # ! build libgcc
   327     if [    "${build_libstdcxx}" = "yes"    \
   328          -a "${CT_CC_LANG_CXX}"  = "y"      \
   329        ]; then
   330         core_targets+=( target-libstdc++-v3 )
   331     fi
   332 
   333     CT_DoLog EXTRA "Building ${mode} core C compiler"
   334     CT_DoExecLog ALL make ${JOBSFLAGS} "${core_targets[@]/#/all-}"
   335 
   336     CT_DoLog EXTRA "Installing ${mode} core C compiler"
   337     CT_DoExecLog ALL make "${core_targets[@]/#/install-}"
   338 
   339     # Create a symlink ${CT_TARGET}-cc to ${CT_TARGET}-gcc to always be able
   340     # to call the C compiler with the same, somewhat canonical name.
   341     # check whether compiler has an extension
   342     file="$( ls -1 "${core_prefix_dir}/bin/${CT_TARGET}-gcc."* 2>/dev/null || true )"
   343     [ -z "${file}" ] || ext=".${file##*.}"
   344     CT_DoExecLog ALL ln -sv "${CT_TARGET}-gcc${ext}" "${core_prefix_dir}/bin/${CT_TARGET}-cc${ext}"
   345 
   346     CT_EndStep
   347 }
   348 
   349 #------------------------------------------------------------------------------
   350 # Build final gcc
   351 do_cc() {
   352     local -a extra_config
   353     local -a final_LDFLAGS
   354     local tmp
   355 
   356     # If building for bare metal, nothing to be done here, the static core conpiler is enough!
   357     [ "${CT_BARE_METAL}" = "y" ] && return 0
   358 
   359     CT_DoStep INFO "Installing final compiler"
   360 
   361     mkdir -p "${CT_BUILD_DIR}/build-cc"
   362     cd "${CT_BUILD_DIR}/build-cc"
   363 
   364     CT_DoLog EXTRA "Configuring final compiler"
   365 
   366     # Enable selected languages
   367     lang_opt="c"
   368     [ "${CT_CC_LANG_CXX}" = "y"      ] && lang_opt="${lang_opt},c++"
   369     [ "${CT_CC_LANG_FORTRAN}" = "y"  ] && lang_opt="${lang_opt},fortran"
   370     [ "${CT_CC_LANG_ADA}" = "y"      ] && lang_opt="${lang_opt},ada"
   371     [ "${CT_CC_LANG_JAVA}" = "y"     ] && lang_opt="${lang_opt},java"
   372     [ "${CT_CC_LANG_OBJC}" = "y"     ] && lang_opt="${lang_opt},objc"
   373     [ "${CT_CC_LANG_OBJCXX}" = "y"   ] && lang_opt="${lang_opt},obj-c++"
   374     CT_Test "Building ADA language is not yet supported. Will try..." "${CT_CC_LANG_ADA}" = "y"
   375     CT_Test "Building Objective-C language is not yet supported. Will try..." "${CT_CC_LANG_OBJC}" = "y"
   376     CT_Test "Building Objective-C++ language is not yet supported. Will try..." "${CT_CC_LANG_OBJCXX}" = "y"
   377     CT_Test "Building ${CT_CC_LANG_OTHERS//,/ } language(s) is not yet supported. Will try..." -n "${CT_CC_LANG_OTHERS}"
   378     lang_opt=$(echo "${lang_opt},${CT_CC_LANG_OTHERS}" |sed -r -e 's/,+/,/g; s/,*$//;')
   379 
   380     extra_config+=("--enable-languages=${lang_opt}")
   381     extra_config+=("--disable-multilib")
   382     for tmp in ARCH ABI CPU TUNE FPU FLOAT; do
   383         eval tmp="\${CT_ARCH_WITH_${tmp}}"
   384         if [ -n "${tmp}" ]; then
   385             extra_config+=("${tmp}")
   386         fi
   387     done
   388 
   389     [ "${CT_SHARED_LIBS}" = "y" ]                   || extra_config+=("--disable-shared")
   390     [ -n "${CT_CC_PKGVERSION}" ]                    && extra_config+=("--with-pkgversion=${CT_CC_PKGVERSION}")
   391     [ -n "${CT_CC_BUGURL}" ]                        && extra_config+=("--with-bugurl=${CT_CC_BUGURL}")
   392     case "${CT_CC_GCC_SJLJ_EXCEPTIONS}" in
   393         y)  extra_config+=("--enable-sjlj-exceptions");;
   394         m)  ;;
   395         "") extra_config+=("--disable-sjlj-exceptions");;
   396     esac
   397     if [ "${CT_CC_CXA_ATEXIT}" = "y" ]; then
   398         extra_config+=("--enable-__cxa_atexit")
   399     else
   400         extra_config+=("--disable-__cxa_atexit")
   401     fi
   402     if [ -n "${CC_ENABLE_CXX_FLAGS}" ]; then
   403         extra_config+=("--enable-cxx-flags=${CC_ENABLE_CXX_FLAGS}")
   404     fi
   405     if [ "${CT_CC_GCC_LIBMUDFLAP}" = "y" ]; then
   406         extra_config+=(--enable-libmudflap)
   407     else
   408         extra_config+=(--disable-libmudflap)
   409     fi
   410     if [ "${CT_CC_GCC_LIBGOMP}" = "y" ]; then
   411         extra_config+=(--enable-libgomp)
   412     else
   413         extra_config+=(--disable-libgomp)
   414     fi
   415     if [ "${CT_CC_GCC_LIBSSP}" = "y" ]; then
   416         extra_config+=(--enable-libssp)
   417     else
   418         extra_config+=(--disable-libssp)
   419     fi
   420 
   421     # *** WARNING ! ***
   422     # Keep this full if-else-if-elif-fi-fi block in sync
   423     # with the same block in do_cc_core, above.
   424     if [ "${CT_STATIC_TOOLCHAIN}" = "y" ]; then
   425         final_LDFLAGS+=("-static")
   426         extra_config+=("--with-host-libstdcxx=-static-libgcc -Wl,-Bstatic,-lstdc++ -lm")
   427         # Companion libraries are build static (eg !shared), so
   428         # the libstdc++ is not pulled automatically, although it
   429         # is needed. Shoe-horn it in our LDFLAGS
   430         # Ditto libm on some Fedora boxen
   431         final_LDFLAGS+=("-lstdc++")
   432         final_LDFLAGS+=("-lm")
   433     else
   434         if [ "${CT_CC_STATIC_LIBSTDCXX}" = "y" ]; then
   435             # this is from CodeSourcery arm-2010q1-202-arm-none-linux-gnueabi.src.tar.bz2
   436             # build script
   437             # FIXME: if the host gcc is gcc-4.5 then presumably we could use -static-libstdc++,
   438             # see http://gcc.gnu.org/ml/gcc-patches/2009-06/msg01635.html
   439             extra_config+=("--with-host-libstdcxx=-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm")
   440         elif [ "${CT_COMPLIBS_SHARED}" != "y" ]; then
   441             # When companion libraries are build static (eg !shared),
   442             # the libstdc++ is not pulled automatically, although it
   443             # is needed. Shoe-horn it in our LDFLAGS
   444             # Ditto libm on some Fedora boxen
   445             final_LDFLAGS+=("-lstdc++")
   446             final_LDFLAGS+=("-lm")
   447         fi
   448     fi
   449 
   450     if [ "${CT_CC_GCC_USE_GMP_MPFR}" = "y" ]; then
   451         extra_config+=("--with-gmp=${CT_COMPLIBS_DIR}")
   452         extra_config+=("--with-mpfr=${CT_COMPLIBS_DIR}")
   453     fi
   454     if [ "${CT_CC_GCC_USE_MPC}" = "y" ]; then
   455         extra_config+=("--with-mpc=${CT_COMPLIBS_DIR}")
   456     fi
   457     if [ "${CT_CC_GCC_USE_GRAPHITE}" = "y" ]; then
   458         extra_config+=("--with-ppl=${CT_COMPLIBS_DIR}")
   459         extra_config+=("--with-cloog=${CT_COMPLIBS_DIR}")
   460     elif [ "${CT_CC_GCC_HAS_GRAPHITE}" = "y" ]; then
   461         extra_config+=("--with-ppl=no")
   462         extra_config+=("--with-cloog=no")
   463     fi
   464     if [ "${CT_CC_GCC_USE_LTO}" = "y" ]; then
   465         extra_config+=("--with-libelf=${CT_COMPLIBS_DIR}")
   466     elif [ "${CT_CC_GCC_HAS_LTO}" = "y" ]; then
   467         extra_config+=("--with-libelf=no")
   468     fi
   469 
   470     if [ "${CT_THREADS}" = "none" ]; then
   471         extra_config+=("--disable-threads")
   472         if [ "${CT_CC_GCC_4_2_or_later}" = y ]; then
   473             CT_Test "Disabling libgomp for no-thread gcc>=4.2" "${CT_CC_GCC_LIBGOMP}" = "Y"
   474             extra_config+=("--disable-libgomp")
   475         fi
   476     else
   477         if [ "${CT_THREADS}" = "win32" ]; then
   478             extra_config+=("--enable-threads=win32")
   479             extra_config+=("--disable-win32-registry")
   480         else
   481             extra_config+=("--enable-threads=posix")
   482         fi
   483     fi
   484 
   485     if [ "${CT_CC_GCC_ENABLE_TARGET_OPTSPACE}" = "y" ]; then
   486         extra_config+=("--enable-target-optspace")
   487     fi
   488     if [ "${CT_CC_GCC_DISABLE_PCH}" = "y" ]; then
   489         extra_config+=("--disable-libstdcxx-pch")
   490     fi
   491 
   492     case "${CT_CC_GCC_LDBL_128}" in
   493         y)  extra_config+=("--with-long-double-128");;
   494         m)  ;;
   495         "") extra_config+=("--without-long-double-128");;
   496     esac
   497 
   498     if [ "${CT_CC_GCC_ENABLE_PLUGINS}" = "y" ]; then
   499         extra_config+=( --enable-plugin )
   500     fi
   501     if [ "${CT_CC_GCC_GOLD}" = "y" ]; then
   502         extra_config+=( --enable-gold )
   503     fi
   504 
   505     CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'"
   506 
   507     # --enable-symvers=gnu really only needed for sh4 to work around a
   508     # detection problem only matters for gcc-3.2.x and later, I think.
   509     # --disable-nls to work around crash bug on ppc405, but also because
   510     # embedded systems don't really need message catalogs...
   511     CT_DoExecLog CFG                                \
   512     CC_FOR_BUILD="${CT_BUILD}-gcc"                  \
   513     CFLAGS="${CT_CFLAGS_FOR_HOST}"                  \
   514     LDFLAGS="${final_LDFLAGS[*]}"                   \
   515     CFLAGS_FOR_TARGET="${CT_TARGET_CFLAGS}"         \
   516     CXXFLAGS_FOR_TARGET="${CT_TARGET_CFLAGS}"       \
   517     LDFLAGS_FOR_TARGET="${CT_TARGET_LDFLAGS}"       \
   518     "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/configure"  \
   519         --build=${CT_BUILD}                         \
   520         --host=${CT_HOST}                           \
   521         --target=${CT_TARGET}                       \
   522         --prefix="${CT_PREFIX_DIR}"                 \
   523         ${CC_SYSROOT_ARG}                           \
   524         "${extra_config[@]}"                        \
   525         --with-local-prefix="${CT_SYSROOT_DIR}"     \
   526         --disable-nls                               \
   527         --enable-symvers=gnu                        \
   528         --enable-c99                                \
   529         --enable-long-long                          \
   530         ${CT_CC_EXTRA_CONFIG}
   531 
   532     if [ "${CT_CANADIAN}" = "y" ]; then
   533         CT_DoLog EXTRA "Building libiberty"
   534         CT_DoExecLog ALL make ${JOBSFLAGS} all-build-libiberty
   535     fi
   536 
   537     CT_DoLog EXTRA "Building final compiler"
   538     CT_DoExecLog ALL make ${JOBSFLAGS} all
   539 
   540     CT_DoLog EXTRA "Installing final compiler"
   541     CT_DoExecLog ALL make install
   542 
   543     # Create a symlink ${CT_TARGET}-cc to ${CT_TARGET}-gcc to always be able
   544     # to call the C compiler with the same, somewhat canonical name.
   545     # check whether compiler has an extension
   546     file="$( ls -1 "${CT_PREFIX_DIR}/bin/${CT_TARGET}-gcc."* 2>/dev/null || true )"
   547     [ -z "${file}" ] || ext=".${file##*.}"
   548     CT_DoExecLog ALL ln -sv "${CT_TARGET}-gcc${ext}" "${CT_PREFIX_DIR}/bin/${CT_TARGET}-cc${ext}"
   549 
   550     CT_EndStep
   551 }