scripts/build/cc/gcc.sh
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Mon Mar 28 01:07:31 2011 +0200 (2011-03-28)
changeset 2368 482a006e5b18
parent 2360 811cf89e8161
child 2466 b7df125a1c78
child 2554 e378a7ccc345
permissions -rw-r--r--
cc/gcc: fix linking with static PPL 0.11+

PPL 0.11+ installs three libs: lippl, libppl_c and libpwl.
libppl_c has a dependency on libpwl (at least for watchdog stuff).

While gcc correctly links with libppl and libppl_c, it does not
pull libpwl in. In case of shared libs, this is not a problem, as
libppl_c has a NEEDED dependency on libpwl. But for static libs,
that does not work. Although libppl_c.la exists and has a correct
dependency on lipwl, somehow gcc misses it. So we have to force
pulling libpwl when needed.

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 host_libstdcxx_flags
   121     local -a extra_config
   122     local -a core_LDFLAGS
   123     local -a core_targets
   124 
   125     while [ $# -ne 0 ]; do
   126         eval "${1}"
   127         shift
   128     done
   129 
   130     lang_opt=c
   131     case "${mode}" in
   132         static)
   133             core_prefix_dir="${CT_CC_CORE_STATIC_PREFIX_DIR}"
   134             extra_config+=("--with-newlib")
   135             extra_config+=("--enable-threads=no")
   136             extra_config+=("--disable-shared")
   137             copy_headers=y  # For baremetal, as there's no headers to copy,
   138                             # we copy an empty directory. So, who cares?
   139             ;;
   140         shared)
   141             core_prefix_dir="${CT_CC_CORE_SHARED_PREFIX_DIR}"
   142             extra_config+=("--enable-shared")
   143             copy_headers=y
   144             ;;
   145         baremetal)
   146             core_prefix_dir="${CT_PREFIX_DIR}"
   147             extra_config+=("--with-newlib")
   148             extra_config+=("--enable-threads=no")
   149             extra_config+=("--disable-shared")
   150             [ "${CT_CC_LANG_CXX}" = "y" ] && lang_opt="${lang_opt},c++"
   151             copy_headers=n
   152             ;;
   153         *)
   154             CT_Abort "Internal Error: 'mode' must be one of: 'static', 'shared' or 'baremetal', not '${mode:-(empty)}'"
   155             ;;
   156     esac
   157 
   158     CT_DoStep INFO "Installing ${mode} core C compiler"
   159     mkdir -p "${CT_BUILD_DIR}/build-cc-core-${mode}"
   160     cd "${CT_BUILD_DIR}/build-cc-core-${mode}"
   161 
   162     # Bare metal delivers the core compiler as final compiler, so add version info and bugurl
   163     [ -n "${CT_CC_BUGURL}" ]     && extra_config+=("--with-bugurl=${CT_CC_BUGURL}")
   164     [ -n "${CT_CC_PKGVERSION}" ] && extra_config+=("--with-pkgversion=${CT_CC_PKGVERSION}")
   165 
   166     if [ "${copy_headers}" = "y" ]; then
   167         CT_DoLog DEBUG "Copying headers to install area of bootstrap gcc, so it can build libgcc2"
   168         CT_DoExecLog ALL cp -a "${CT_HEADERS_DIR}" "${core_prefix_dir}/${CT_TARGET}/include"
   169     fi
   170 
   171     CT_DoLog EXTRA "Configuring ${mode} core C compiler"
   172 
   173     for tmp in ARCH ABI CPU TUNE FPU FLOAT; do
   174         eval tmp="\${CT_ARCH_WITH_${tmp}}"
   175         if [ -n "${tmp}" ]; then
   176             extra_config+=("${tmp}")
   177         fi
   178     done
   179     if [ "${CT_CC_CXA_ATEXIT}" = "y" ]; then
   180         extra_config+=("--enable-__cxa_atexit")
   181     else
   182         extra_config+=("--disable-__cxa_atexit")
   183     fi
   184 
   185     # *** WARNING ! ***
   186     # Keep this full if-else-if-elif-fi-fi block in sync
   187     # with the same block in do_cc, below.
   188     if [ "${build_staticlinked}" = "yes" ]; then
   189         core_LDFLAGS+=("-static")
   190         host_libstdcxx_flags+=("-static-libgcc")
   191         host_libstdcxx_flags+=("-Wl,-Bstatic,-lstdc++")
   192         host_libstdcxx_flags+=("-lm")
   193         # Companion libraries are build static (eg !shared), so
   194         # the libstdc++ is not pulled automatically, although it
   195         # is needed. Shoe-horn it in our LDFLAGS
   196         # Ditto libm on some Fedora boxen
   197         core_LDFLAGS+=("-lstdc++")
   198         core_LDFLAGS+=("-lm")
   199     else
   200         if [ "${CT_CC_STATIC_LIBSTDCXX}" = "y" ]; then
   201             # this is from CodeSourcery arm-2010q1-202-arm-none-linux-gnueabi.src.tar.bz2
   202             # build script
   203             # FIXME: if the host gcc is gcc-4.5 then presumably we could use -static-libstdc++,
   204             # see http://gcc.gnu.org/ml/gcc-patches/2009-06/msg01635.html
   205             host_libstdcxx_flags+=("-static-libgcc")
   206             host_libstdcxx_flags+=("-Wl,-Bstatic,-lstdc++,-Bdynamic")
   207             host_libstdcxx_flags+=("-lm")
   208         elif [ "${CT_COMPLIBS_SHARED}" != "y" ]; then
   209             # When companion libraries are build static (eg !shared),
   210             # the libstdc++ is not pulled automatically, although it
   211             # is needed. Shoe-horn it in our LDFLAGS
   212             # Ditto libm on some Fedora boxen
   213             core_LDFLAGS+=("-lstdc++")
   214             core_LDFLAGS+=("-lm")
   215         fi
   216     fi
   217 
   218     if [ "${CT_CC_GCC_USE_GMP_MPFR}" = "y" ]; then
   219         extra_config+=("--with-gmp=${CT_COMPLIBS_DIR}")
   220         extra_config+=("--with-mpfr=${CT_COMPLIBS_DIR}")
   221     fi
   222     if [ "${CT_CC_GCC_USE_MPC}" = "y" ]; then
   223         extra_config+=("--with-mpc=${CT_COMPLIBS_DIR}")
   224     fi
   225     if [ "${CT_CC_GCC_USE_GRAPHITE}" = "y" ]; then
   226         extra_config+=("--with-ppl=${CT_COMPLIBS_DIR}")
   227         # With PPL 0.11+, also pull libpwl if needed
   228         if [ "${CT_PPL_NEEDS_LIBPWL}" = "y" ]; then
   229             host_libstdcxx_flags+=("-L${CT_COMPLIBS_DIR}/lib")
   230             host_libstdcxx_flags+=("-lpwl")
   231         fi
   232         extra_config+=("--with-cloog=${CT_COMPLIBS_DIR}")
   233     elif [ "${CT_CC_GCC_HAS_GRAPHITE}" = "y" ]; then
   234         extra_config+=("--with-ppl=no")
   235         extra_config+=("--with-cloog=no")
   236     fi
   237     if [ "${CT_CC_GCC_USE_LTO}" = "y" ]; then
   238         extra_config+=("--with-libelf=${CT_COMPLIBS_DIR}")
   239         extra_config+=("--enable-lto")
   240     elif [ "${CT_CC_GCC_HAS_LTO}" = "y" ]; then
   241         extra_config+=("--with-libelf=no")
   242         extra_config+=("--disable-lto")
   243     fi
   244 
   245     if [ ${#host_libstdcxx_flags[@]} -ne 0 ]; then
   246         extra_config+=("--with-host-libstdcxx=${host_libstdcxx_flags[*]}")
   247     fi
   248 
   249     if [ "${CT_CC_GCC_ENABLE_TARGET_OPTSPACE}" = "y" ]; then
   250         extra_config+=("--enable-target-optspace")
   251     fi
   252 
   253     case "${CT_CC_GCC_LDBL_128}" in
   254         y)  extra_config+=("--with-long-double-128");;
   255         m)  ;;
   256         "") extra_config+=("--without-long-double-128");;
   257     esac
   258 
   259     CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'"
   260 
   261     # Use --with-local-prefix so older gccs don't look in /usr/local (http://gcc.gnu.org/PR10532)
   262     CT_DoExecLog CFG                                \
   263     CC_FOR_BUILD="${CT_BUILD}-gcc"                  \
   264     CFLAGS="${CT_CFLAGS_FOR_HOST}"                  \
   265     LDFLAGS="${core_LDFLAGS[*]}"                    \
   266     "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/configure"  \
   267         --build=${CT_BUILD}                         \
   268         --host=${CT_HOST}                           \
   269         --target=${CT_TARGET}                       \
   270         --prefix="${core_prefix_dir}"               \
   271         --with-local-prefix="${CT_SYSROOT_DIR}"     \
   272         --disable-multilib                          \
   273         --disable-libmudflap                        \
   274         ${CC_CORE_SYSROOT_ARG}                      \
   275         "${extra_config[@]}"                        \
   276         --disable-nls                               \
   277         --enable-symvers=gnu                        \
   278         --enable-languages="${lang_opt}"            \
   279         ${CT_CC_CORE_EXTRA_CONFIG}
   280 
   281     if [ "${build_libgcc}" = "yes" ]; then
   282         # HACK: we need to override SHLIB_LC from gcc/config/t-slibgcc-elf-ver or
   283         # gcc/config/t-libunwind so -lc is removed from the link for
   284         # libgcc_s.so, as we do not have a target -lc yet.
   285         # This is not as ugly as it appears to be ;-) All symbols get resolved
   286         # during the glibc build, and we provide a proper libgcc_s.so for the
   287         # cross toolchain during the final gcc build.
   288         #
   289         # As we cannot modify the source tree, nor override SHLIB_LC itself
   290         # during configure or make, we have to edit the resultant
   291         # gcc/libgcc.mk itself to remove -lc from the link.
   292         # This causes us to have to jump through some hoops...
   293         #
   294         # To produce libgcc.mk to edit we firstly require libiberty.a,
   295         # so we configure then build it.
   296         # Next we have to configure gcc, create libgcc.mk then edit it...
   297         # So much easier if we just edit the source tree, but hey...
   298         if [ ! -f "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/gcc/BASE-VER" ]; then
   299             CT_DoExecLog CFG make configure-libiberty
   300             CT_DoExecLog ALL make ${JOBSFLAGS} -C libiberty libiberty.a
   301             CT_DoExecLog CFG make configure-gcc configure-libcpp
   302             CT_DoExecLog ALL make ${JOBSFLAGS} all-libcpp
   303         else
   304             CT_DoExecLog CFG make configure-gcc configure-libcpp configure-build-libiberty
   305             CT_DoExecLog ALL make ${JOBSFLAGS} all-libcpp all-build-libiberty
   306         fi
   307         # HACK: gcc-4.2 uses libdecnumber to build libgcc.mk, so build it here.
   308         if [ -d "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/libdecnumber" ]; then
   309             CT_DoExecLog CFG make configure-libdecnumber
   310             CT_DoExecLog ALL make ${JOBSFLAGS} -C libdecnumber libdecnumber.a
   311         fi
   312 
   313         # Starting with GCC 4.3, libgcc.mk is no longer built,
   314         # and libgcc.mvars is used instead.
   315 
   316         if [ "${CT_CC_GCC_4_3_or_later}" = "y" ]; then
   317             libgcc_rule="libgcc.mvars"
   318             core_targets=( gcc target-libgcc )
   319         else
   320             libgcc_rule="libgcc.mk"
   321             core_targets=( gcc )
   322         fi
   323 
   324         # On bare metal and canadian build the host-compiler is used when
   325         # actually the build-system compiler is required. Choose the correct
   326         # compilers for canadian build and use the defaults on other
   327         # configurations.
   328         if [ "${CT_BARE_METAL},${CT_CANADIAN}" = "y,y" ]; then
   329             repair_cc="CC_FOR_BUILD=${CT_BUILD}-gcc \
   330                        GCC_FOR_TARGET=${CT_TARGET}-gcc"
   331         else
   332             repair_cc=""
   333         fi
   334 
   335         CT_DoExecLog ALL make ${JOBSFLAGS} -C gcc ${libgcc_rule} \
   336                               ${repair_cc}
   337         sed -r -i -e 's@-lc@@g' gcc/${libgcc_rule}
   338     else # build_libgcc
   339         core_targets=( gcc )
   340     fi   # ! build libgcc
   341     if [    "${build_libstdcxx}" = "yes"    \
   342          -a "${CT_CC_LANG_CXX}"  = "y"      \
   343        ]; then
   344         core_targets+=( target-libstdc++-v3 )
   345     fi
   346 
   347     CT_DoLog EXTRA "Building ${mode} core C compiler"
   348     CT_DoExecLog ALL make ${JOBSFLAGS} "${core_targets[@]/#/all-}"
   349 
   350     CT_DoLog EXTRA "Installing ${mode} core C compiler"
   351     CT_DoExecLog ALL make "${core_targets[@]/#/install-}"
   352 
   353     # Create a symlink ${CT_TARGET}-cc to ${CT_TARGET}-gcc to always be able
   354     # to call the C compiler with the same, somewhat canonical name.
   355     # check whether compiler has an extension
   356     file="$( ls -1 "${core_prefix_dir}/bin/${CT_TARGET}-gcc."* 2>/dev/null || true )"
   357     [ -z "${file}" ] || ext=".${file##*.}"
   358     CT_DoExecLog ALL ln -sv "${CT_TARGET}-gcc${ext}" "${core_prefix_dir}/bin/${CT_TARGET}-cc${ext}"
   359 
   360     CT_EndStep
   361 }
   362 
   363 #------------------------------------------------------------------------------
   364 # Build final gcc
   365 do_cc() {
   366     local -a host_libstdcxx_flags
   367     local -a extra_config
   368     local -a final_LDFLAGS
   369     local tmp
   370 
   371     # If building for bare metal, nothing to be done here, the static core conpiler is enough!
   372     [ "${CT_BARE_METAL}" = "y" ] && return 0
   373 
   374     CT_DoStep INFO "Installing final compiler"
   375 
   376     mkdir -p "${CT_BUILD_DIR}/build-cc"
   377     cd "${CT_BUILD_DIR}/build-cc"
   378 
   379     CT_DoLog EXTRA "Configuring final compiler"
   380 
   381     # Enable selected languages
   382     lang_opt="c"
   383     [ "${CT_CC_LANG_CXX}" = "y"      ] && lang_opt="${lang_opt},c++"
   384     [ "${CT_CC_LANG_FORTRAN}" = "y"  ] && lang_opt="${lang_opt},fortran"
   385     [ "${CT_CC_LANG_ADA}" = "y"      ] && lang_opt="${lang_opt},ada"
   386     [ "${CT_CC_LANG_JAVA}" = "y"     ] && lang_opt="${lang_opt},java"
   387     [ "${CT_CC_LANG_OBJC}" = "y"     ] && lang_opt="${lang_opt},objc"
   388     [ "${CT_CC_LANG_OBJCXX}" = "y"   ] && lang_opt="${lang_opt},obj-c++"
   389     CT_Test "Building ADA language is not yet supported. Will try..." "${CT_CC_LANG_ADA}" = "y"
   390     CT_Test "Building Objective-C language is not yet supported. Will try..." "${CT_CC_LANG_OBJC}" = "y"
   391     CT_Test "Building Objective-C++ language is not yet supported. Will try..." "${CT_CC_LANG_OBJCXX}" = "y"
   392     CT_Test "Building ${CT_CC_LANG_OTHERS//,/ } language(s) is not yet supported. Will try..." -n "${CT_CC_LANG_OTHERS}"
   393     lang_opt=$(echo "${lang_opt},${CT_CC_LANG_OTHERS}" |sed -r -e 's/,+/,/g; s/,*$//;')
   394 
   395     extra_config+=("--enable-languages=${lang_opt}")
   396     extra_config+=("--disable-multilib")
   397     for tmp in ARCH ABI CPU TUNE FPU FLOAT; do
   398         eval tmp="\${CT_ARCH_WITH_${tmp}}"
   399         if [ -n "${tmp}" ]; then
   400             extra_config+=("${tmp}")
   401         fi
   402     done
   403 
   404     [ "${CT_SHARED_LIBS}" = "y" ]                   || extra_config+=("--disable-shared")
   405     [ -n "${CT_CC_PKGVERSION}" ]                    && extra_config+=("--with-pkgversion=${CT_CC_PKGVERSION}")
   406     [ -n "${CT_CC_BUGURL}" ]                        && extra_config+=("--with-bugurl=${CT_CC_BUGURL}")
   407     case "${CT_CC_GCC_SJLJ_EXCEPTIONS}" in
   408         y)  extra_config+=("--enable-sjlj-exceptions");;
   409         m)  ;;
   410         "") extra_config+=("--disable-sjlj-exceptions");;
   411     esac
   412     if [ "${CT_CC_CXA_ATEXIT}" = "y" ]; then
   413         extra_config+=("--enable-__cxa_atexit")
   414     else
   415         extra_config+=("--disable-__cxa_atexit")
   416     fi
   417     if [ -n "${CC_ENABLE_CXX_FLAGS}" ]; then
   418         extra_config+=("--enable-cxx-flags=${CC_ENABLE_CXX_FLAGS}")
   419     fi
   420     if [ "${CT_CC_GCC_LIBMUDFLAP}" = "y" ]; then
   421         extra_config+=(--enable-libmudflap)
   422     else
   423         extra_config+=(--disable-libmudflap)
   424     fi
   425     if [ "${CT_CC_GCC_LIBGOMP}" = "y" ]; then
   426         extra_config+=(--enable-libgomp)
   427     else
   428         extra_config+=(--disable-libgomp)
   429     fi
   430     if [ "${CT_CC_GCC_LIBSSP}" = "y" ]; then
   431         extra_config+=(--enable-libssp)
   432     else
   433         extra_config+=(--disable-libssp)
   434     fi
   435 
   436     # *** WARNING ! ***
   437     # Keep this full if-else-if-elif-fi-fi block in sync
   438     # with the same block in do_cc_core, above.
   439     if [ "${CT_STATIC_TOOLCHAIN}" = "y" ]; then
   440         final_LDFLAGS+=("-static")
   441         host_libstdcxx_flags+=("-static-libgcc")
   442         host_libstdcxx_flags+=("-Wl,-Bstatic,-lstdc++")
   443         host_libstdcxx_flags+=("-lm")
   444         # Companion libraries are build static (eg !shared), so
   445         # the libstdc++ is not pulled automatically, although it
   446         # is needed. Shoe-horn it in our LDFLAGS
   447         # Ditto libm on some Fedora boxen
   448         final_LDFLAGS+=("-lstdc++")
   449         final_LDFLAGS+=("-lm")
   450     else
   451         if [ "${CT_CC_STATIC_LIBSTDCXX}" = "y" ]; then
   452             # this is from CodeSourcery arm-2010q1-202-arm-none-linux-gnueabi.src.tar.bz2
   453             # build script
   454             # FIXME: if the host gcc is gcc-4.5 then presumably we could use -static-libstdc++,
   455             # see http://gcc.gnu.org/ml/gcc-patches/2009-06/msg01635.html
   456             host_libstdcxx_flags+=("-static-libgcc")
   457             host_libstdcxx_flags+=("-Wl,-Bstatic,-lstdc++,-Bdynamic")
   458             host_libstdcxx_flags+=("-lm")
   459         elif [ "${CT_COMPLIBS_SHARED}" != "y" ]; then
   460             # When companion libraries are build static (eg !shared),
   461             # the libstdc++ is not pulled automatically, although it
   462             # is needed. Shoe-horn it in our LDFLAGS
   463             # Ditto libm on some Fedora boxen
   464             final_LDFLAGS+=("-lstdc++")
   465             final_LDFLAGS+=("-lm")
   466         fi
   467     fi
   468 
   469     if [ "${CT_CC_GCC_USE_GMP_MPFR}" = "y" ]; then
   470         extra_config+=("--with-gmp=${CT_COMPLIBS_DIR}")
   471         extra_config+=("--with-mpfr=${CT_COMPLIBS_DIR}")
   472     fi
   473     if [ "${CT_CC_GCC_USE_MPC}" = "y" ]; then
   474         extra_config+=("--with-mpc=${CT_COMPLIBS_DIR}")
   475     fi
   476     if [ "${CT_CC_GCC_USE_GRAPHITE}" = "y" ]; then
   477         extra_config+=("--with-ppl=${CT_COMPLIBS_DIR}")
   478         # With PPL 0.11+, also pull libpwl if needed
   479         if [ "${CT_PPL_NEEDS_LIBPWL}" = "y" ]; then
   480             host_libstdcxx_flags+=("-L${CT_COMPLIBS_DIR}/lib")
   481             host_libstdcxx_flags+=("-lpwl")
   482         fi
   483         extra_config+=("--with-cloog=${CT_COMPLIBS_DIR}")
   484     elif [ "${CT_CC_GCC_HAS_GRAPHITE}" = "y" ]; then
   485         extra_config+=("--with-ppl=no")
   486         extra_config+=("--with-cloog=no")
   487     fi
   488     if [ "${CT_CC_GCC_USE_LTO}" = "y" ]; then
   489         extra_config+=("--with-libelf=${CT_COMPLIBS_DIR}")
   490     elif [ "${CT_CC_GCC_HAS_LTO}" = "y" ]; then
   491         extra_config+=("--with-libelf=no")
   492     fi
   493 
   494     if [ ${#host_libstdcxx_flags[@]} -ne 0 ]; then
   495         extra_config+=("--with-host-libstdcxx=${host_libstdcxx_flags[*]}")
   496     fi
   497 
   498     if [ "${CT_THREADS}" = "none" ]; then
   499         extra_config+=("--disable-threads")
   500         if [ "${CT_CC_GCC_4_2_or_later}" = y ]; then
   501             CT_Test "Disabling libgomp for no-thread gcc>=4.2" "${CT_CC_GCC_LIBGOMP}" = "Y"
   502             extra_config+=("--disable-libgomp")
   503         fi
   504     else
   505         if [ "${CT_THREADS}" = "win32" ]; then
   506             extra_config+=("--enable-threads=win32")
   507             extra_config+=("--disable-win32-registry")
   508         else
   509             extra_config+=("--enable-threads=posix")
   510         fi
   511     fi
   512 
   513     if [ "${CT_CC_GCC_ENABLE_TARGET_OPTSPACE}" = "y" ]; then
   514         extra_config+=("--enable-target-optspace")
   515     fi
   516     if [ "${CT_CC_GCC_DISABLE_PCH}" = "y" ]; then
   517         extra_config+=("--disable-libstdcxx-pch")
   518     fi
   519 
   520     case "${CT_CC_GCC_LDBL_128}" in
   521         y)  extra_config+=("--with-long-double-128");;
   522         m)  ;;
   523         "") extra_config+=("--without-long-double-128");;
   524     esac
   525 
   526     if [ "${CT_CC_GCC_ENABLE_PLUGINS}" = "y" ]; then
   527         extra_config+=( --enable-plugin )
   528     fi
   529     if [ "${CT_CC_GCC_GOLD}" = "y" ]; then
   530         extra_config+=( --enable-gold )
   531     fi
   532 
   533     CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'"
   534 
   535     # --enable-symvers=gnu really only needed for sh4 to work around a
   536     # detection problem only matters for gcc-3.2.x and later, I think.
   537     # --disable-nls to work around crash bug on ppc405, but also because
   538     # embedded systems don't really need message catalogs...
   539     CT_DoExecLog CFG                                \
   540     CC_FOR_BUILD="${CT_BUILD}-gcc"                  \
   541     CFLAGS="${CT_CFLAGS_FOR_HOST}"                  \
   542     LDFLAGS="${final_LDFLAGS[*]}"                   \
   543     CFLAGS_FOR_TARGET="${CT_TARGET_CFLAGS}"         \
   544     CXXFLAGS_FOR_TARGET="${CT_TARGET_CFLAGS}"       \
   545     LDFLAGS_FOR_TARGET="${CT_TARGET_LDFLAGS}"       \
   546     "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/configure"  \
   547         --build=${CT_BUILD}                         \
   548         --host=${CT_HOST}                           \
   549         --target=${CT_TARGET}                       \
   550         --prefix="${CT_PREFIX_DIR}"                 \
   551         ${CC_SYSROOT_ARG}                           \
   552         "${extra_config[@]}"                        \
   553         --with-local-prefix="${CT_SYSROOT_DIR}"     \
   554         --disable-nls                               \
   555         --enable-symvers=gnu                        \
   556         --enable-c99                                \
   557         --enable-long-long                          \
   558         ${CT_CC_EXTRA_CONFIG}
   559 
   560     if [ "${CT_CANADIAN}" = "y" ]; then
   561         CT_DoLog EXTRA "Building libiberty"
   562         CT_DoExecLog ALL make ${JOBSFLAGS} all-build-libiberty
   563     fi
   564 
   565     CT_DoLog EXTRA "Building final compiler"
   566     CT_DoExecLog ALL make ${JOBSFLAGS} all
   567 
   568     CT_DoLog EXTRA "Installing final compiler"
   569     CT_DoExecLog ALL make install
   570 
   571     # Create a symlink ${CT_TARGET}-cc to ${CT_TARGET}-gcc to always be able
   572     # to call the C compiler with the same, somewhat canonical name.
   573     # check whether compiler has an extension
   574     file="$( ls -1 "${CT_PREFIX_DIR}/bin/${CT_TARGET}-gcc."* 2>/dev/null || true )"
   575     [ -z "${file}" ] || ext=".${file##*.}"
   576     CT_DoExecLog ALL ln -sv "${CT_TARGET}-gcc${ext}" "${CT_PREFIX_DIR}/bin/${CT_TARGET}-cc${ext}"
   577 
   578     CT_EndStep
   579 }