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crosstool-ng/scripts/build/cc/gcc.sh
Yann E. MORIN" 656dae57eb cc/gcc: baremetal requires a two-pass process 
Here, we implement a highly ugly hack. I'm not proud of that one...

To build the libstdc++ library, the compiler requires the C library. In
case we build for non-baremetal, this is normally handled by the final
step, later.

But in the case of bare-metal, we never go through the final step (because
it does not work, and it seems complex enough to make it work), so the
baremetal compilers are issued out of the core step.
2010-06-13 23:38:37 +02:00

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# This file adds the function to build the gcc C compiler
# Copyright 2007 Yann E. MORIN
# Licensed under the GPL v2. See COPYING in the root of this package
# Download gcc
do_cc_get() {
# Ah! gcc folks are kind of 'different': they store the tarballs in
# subdirectories of the same name! That's because gcc is such /crap/ that
# it is such /big/ that it needs being splitted for distribution! Sad. :-(
# Arrgghh! Some of those versions does not follow this convention:
# gcc-3.3.3 lives in releases/gcc-3.3.3, while gcc-2.95.* isn't in a
# subdirectory! You bastard!
CT_GetFile "gcc-${CT_CC_VERSION}" \
{ftp,http}://ftp.gnu.org/gnu/gcc{,{,/releases}/gcc-${CT_CC_VERSION}} \
ftp://ftp.irisa.fr/pub/mirrors/gcc.gnu.org/gcc/releases/gcc-${CT_CC_VERSION} \
ftp://ftp.uvsq.fr/pub/gcc/snapshots/${CT_CC_VERSION}
# Starting with GCC 4.3, ecj is used for Java, and will only be
# built if the configure script finds ecj.jar at the top of the
# GCC source tree, which will not be there unless we get it and
# put it there ourselves
if [ "${CT_CC_LANG_JAVA_USE_ECJ}" = "y" ]; then
CT_GetFile ecj-latest .jar ftp://gcc.gnu.org/pub/java \
ftp://sourceware.org/pub/java
fi
}
# Extract gcc
do_cc_extract() {
CT_Extract "gcc-${CT_CC_VERSION}"
CT_Patch "gcc" "${CT_CC_VERSION}"
# Copy ecj-latest.jar to ecj.jar at the top of the GCC source tree
if [ "${CT_CC_LANG_JAVA_USE_ECJ}" = "y" \
-a ! -f "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/ecj.jar" \
]; then
CT_DoExecLog ALL cp -v "${CT_TARBALLS_DIR}/ecj-latest.jar" "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/ecj.jar"
fi
}
#------------------------------------------------------------------------------
# Core gcc pass 1
do_cc_core_pass_1() {
# If we're building for bare metal, build the static core gcc,
# with libgcc.
# In case we're not bare metal and building a canadian compiler, do nothing
# In case we're not bare metal, and we're NPTL, build the static core gcc.
# In any other case, do nothing.
case "${CT_BARE_METAL},${CT_CANADIAN},${CT_THREADS}" in
y,*,*) do_cc_core mode=static;;
,y,*) ;;
,,nptl) do_cc_core mode=static;;
*) ;;
esac
}
# Core gcc pass 2
do_cc_core_pass_2() {
# In case we're building for bare metal, do nothing, we already have
# our compiler.
# In case we're not bare metal and building a canadian compiler, do nothing
# In case we're NPTL, build the shared core gcc and the target libgcc.
# In any other case, build the static core gcc and, if using gcc-4.3+,
# also build the target libgcc.
case "${CT_BARE_METAL},${CT_CANADIAN},${CT_THREADS}" in
y,*,*) do_cc_core mode=baremetal build_libgcc=yes build_libstdcxx=yes;;
,y,*) ;;
,,nptl)
do_cc_core mode=shared build_libgcc=yes
;;
*) if [ "${CT_CC_GCC_4_3_or_later}" = "y" ]; then
do_cc_core mode=static build_libgcc=yes
else
do_cc_core mode=static
fi
;;
esac
}
#------------------------------------------------------------------------------
# Build core gcc
# This function is used to build both the static and the shared core C conpiler,
# with or without the target libgcc. We need to know wether:
# - we're building static, shared or bare metal: mode=[static|shared|baremetal]
# - we need to build libgcc or not : build_libgcc=[yes|no] (default: no)
# - we need to build libstdc++ or not : build_libstdcxx=[yes|no] (default: no)
# Usage: do_cc_core_static mode=[static|shared|baremetal] build_libgcc=[yes|no]
do_cc_core() {
local mode
local build_libgcc=no
local build_libstdcxx=no
local core_prefix_dir
local lang_opt
local tmp
local -a extra_config
local core_LDFLAGS
local -a core_targets
while [ $# -ne 0 ]; do
eval "${1}"
shift
done
lang_opt=c
case "${mode}" in
static)
core_prefix_dir="${CT_CC_CORE_STATIC_PREFIX_DIR}"
extra_config+=("--with-newlib")
extra_config+=("--enable-threads=no")
extra_config+=("--disable-shared")
copy_headers=y # For baremetal, as there's no headers to copy,
# we copy an empty directory. So, who cares?
;;
shared)
core_prefix_dir="${CT_CC_CORE_SHARED_PREFIX_DIR}"
extra_config+=("--enable-shared")
copy_headers=y
;;
baremetal)
core_prefix_dir="${CT_PREFIX_DIR}"
extra_config+=("--with-newlib")
extra_config+=("--enable-threads=no")
extra_config+=("--disable-shared")
[ "${CT_CC_LANG_CXX}" = "y" ] && lang_opt="${lang_opt},c++"
copy_headers=n
;;
*)
CT_Abort "Internal Error: 'mode' must be one of: 'static', 'shared' or 'baremetal', not '${mode:-(empty)}'"
;;
esac
CT_DoStep INFO "Installing ${mode} core C compiler"
mkdir -p "${CT_BUILD_DIR}/build-cc-core-${mode}"
cd "${CT_BUILD_DIR}/build-cc-core-${mode}"
# Bare metal delivers the core compiler as final compiler, so add version info and bugurl
[ -n "${CT_CC_BUGURL}" ] && extra_config+=("--with-bugurl=${CT_CC_BUGURL}")
[ -n "${CT_CC_PKGVERSION}" ] && extra_config+=("--with-pkgversion=${CT_CC_PKGVERSION}")
if [ "${copy_headers}" = "y" ]; then
CT_DoLog DEBUG "Copying headers to install area of bootstrap gcc, so it can build libgcc2"
CT_DoExecLog ALL cp -a "${CT_HEADERS_DIR}" "${core_prefix_dir}/${CT_TARGET}/include"
fi
CT_DoLog EXTRA "Configuring ${mode} core C compiler"
for tmp in ARCH ABI CPU TUNE FPU FLOAT; do
eval tmp="\${CT_ARCH_WITH_${tmp}}"
if [ -n "${tmp}" ]; then
extra_config+=("${tmp}")
fi
done
if [ "${CT_CC_CXA_ATEXIT}" = "y" ]; then
extra_config+=("--enable-__cxa_atexit")
else
extra_config+=("--disable-__cxa_atexit")
fi
# When companion libraries are build static (eg !shared),
# the libstdc++ is not pulled automatically, although it
# is needed. Shoe-horn it in our LDFLAGS
if [ "${CT_COMPLIBS_SHARED}" != "y" ]; then
core_LDFLAGS='-lstdc++'
fi
if [ "${CT_CC_GCC_USE_GMP_MPFR}" = "y" ]; then
extra_config+=("--with-gmp=${CT_COMPLIBS_DIR}")
extra_config+=("--with-mpfr=${CT_COMPLIBS_DIR}")
fi
if [ "${CT_CC_GCC_USE_PPL_CLOOG_MPC}" = "y" ]; then
extra_config+=("--with-ppl=${CT_COMPLIBS_DIR}")
extra_config+=("--with-cloog=${CT_COMPLIBS_DIR}")
extra_config+=("--with-mpc=${CT_COMPLIBS_DIR}")
fi
if [ "${CT_CC_GCC_USE_LIBELF}" = "y" ]; then
extra_config+=("--with-libelf=${CT_COMPLIBS_DIR}")
fi
if [ "${CT_CC_GCC_ENABLE_TARGET_OPTSPACE}" = "y" ]; then
extra_config+=("--enable-target-optspace")
fi
CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'"
# Use --with-local-prefix so older gccs don't look in /usr/local (http://gcc.gnu.org/PR10532)
CC_FOR_BUILD="${CT_BUILD}-gcc" \
CFLAGS="${CT_CFLAGS_FOR_HOST}" \
LDFLAGS="${core_LDFLAGS}" \
CT_DoExecLog ALL \
"${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/configure" \
--build=${CT_BUILD} \
--host=${CT_HOST} \
--target=${CT_TARGET} \
--prefix="${core_prefix_dir}" \
--with-local-prefix="${CT_SYSROOT_DIR}" \
--disable-multilib \
${CC_CORE_SYSROOT_ARG} \
"${extra_config[@]}" \
--disable-nls \
--enable-symvers=gnu \
--enable-languages="${lang_opt}" \
${CT_CC_CORE_EXTRA_CONFIG}
if [ "${build_libgcc}" = "yes" ]; then
# HACK: we need to override SHLIB_LC from gcc/config/t-slibgcc-elf-ver or
# gcc/config/t-libunwind so -lc is removed from the link for
# libgcc_s.so, as we do not have a target -lc yet.
# This is not as ugly as it appears to be ;-) All symbols get resolved
# during the glibc build, and we provide a proper libgcc_s.so for the
# cross toolchain during the final gcc build.
#
# As we cannot modify the source tree, nor override SHLIB_LC itself
# during configure or make, we have to edit the resultant
# gcc/libgcc.mk itself to remove -lc from the link.
# This causes us to have to jump through some hoops...
#
# To produce libgcc.mk to edit we firstly require libiberty.a,
# so we configure then build it.
# Next we have to configure gcc, create libgcc.mk then edit it...
# So much easier if we just edit the source tree, but hey...
if [ ! -f "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/gcc/BASE-VER" ]; then
CT_DoExecLog ALL make configure-libiberty
CT_DoExecLog ALL make ${PARALLELMFLAGS} -C libiberty libiberty.a
CT_DoExecLog ALL make configure-gcc configure-libcpp
CT_DoExecLog ALL make ${PARALLELMFLAGS} all-libcpp
else
CT_DoExecLog ALL make configure-gcc configure-libcpp configure-build-libiberty
CT_DoExecLog ALL make ${PARALLELMFLAGS} all-libcpp all-build-libiberty
fi
# HACK: gcc-4.2 uses libdecnumber to build libgcc.mk, so build it here.
if [ -d "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/libdecnumber" ]; then
CT_DoExecLog ALL make configure-libdecnumber
CT_DoExecLog ALL make ${PARALLELMFLAGS} -C libdecnumber libdecnumber.a
fi
# Starting with GCC 4.3, libgcc.mk is no longer built,
# and libgcc.mvars is used instead.
if [ "${CT_CC_GCC_4_3_or_later}" = "y" ]; then
libgcc_rule="libgcc.mvars"
core_targets=( gcc target-libgcc )
else
libgcc_rule="libgcc.mk"
core_targets=( gcc )
fi
# On bare metal and canadian build the host-compiler is used when
# actually the build-system compiler is required. Choose the correct
# compilers for canadian build and use the defaults on other
# configurations.
if [ "${CT_BARE_METAL},${CT_CANADIAN}" = "y,y" ]; then
repair_cc="CC_FOR_BUILD=${CT_BUILD}-gcc \
GCC_FOR_TARGET=${CT_TARGET}-gcc"
else
repair_cc=""
fi
CT_DoExecLog ALL make ${PARALLELMFLAGS} -C gcc ${libgcc_rule} \
${repair_cc}
sed -r -i -e 's@-lc@@g' gcc/${libgcc_rule}
else # build_libgcc
core_targets=( gcc )
fi # ! build libgcc
if [ "${build_libstdcxx}" = "yes" \
-a "${CT_CC_LANG_CXX}" = "y" \
]; then
core_targets+=( target-libstdc++-v3 )
fi
CT_DoLog EXTRA "Building ${mode} core C compiler"
CT_DoExecLog ALL make ${PARALLELMFLAGS} "${core_targets[@]/#/all-}"
CT_DoLog EXTRA "Installing ${mode} core C compiler"
CT_DoExecLog ALL make "${core_targets[@]/#/install-}"
# Create a symlink ${CT_TARGET}-cc to ${CT_TARGET}-gcc to always be able
# to call the C compiler with the same, somewhat canonical name.
# check whether compiler has an extension
file="$( ls -1 "${core_prefix_dir}/bin/${CT_TARGET}-gcc."* 2>/dev/null || true )"
[ -z "${file}" ] || ext=".${file##*.}"
CT_DoExecLog ALL ln -sv "${CT_TARGET}-gcc${ext}" "${core_prefix_dir}/bin/${CT_TARGET}-cc${ext}"
CT_EndStep
}
#------------------------------------------------------------------------------
# Build final gcc
do_cc() {
local -a extra_config
local tmp
local final_LDFLAGS
# If building for bare metal, nothing to be done here, the static core conpiler is enough!
[ "${CT_BARE_METAL}" = "y" ] && return 0
CT_DoStep INFO "Installing final compiler"
mkdir -p "${CT_BUILD_DIR}/build-cc"
cd "${CT_BUILD_DIR}/build-cc"
CT_DoLog EXTRA "Configuring final compiler"
# Enable selected languages
lang_opt="c"
[ "${CT_CC_LANG_CXX}" = "y" ] && lang_opt="${lang_opt},c++"
[ "${CT_CC_LANG_FORTRAN}" = "y" ] && lang_opt="${lang_opt},fortran"
[ "${CT_CC_LANG_ADA}" = "y" ] && lang_opt="${lang_opt},ada"
[ "${CT_CC_LANG_JAVA}" = "y" ] && lang_opt="${lang_opt},java"
[ "${CT_CC_LANG_OBJC}" = "y" ] && lang_opt="${lang_opt},objc"
[ "${CT_CC_LANG_OBJCXX}" = "y" ] && lang_opt="${lang_opt},obj-c++"
CT_Test "Building ADA language is not yet supported. Will try..." "${CT_CC_LANG_ADA}" = "y"
CT_Test "Building Objective-C language is not yet supported. Will try..." "${CT_CC_LANG_OBJC}" = "y"
CT_Test "Building Objective-C++ language is not yet supported. Will try..." "${CT_CC_LANG_OBJCXX}" = "y"
CT_Test "Building ${CT_CC_LANG_OTHERS//,/ } language(s) is not yet supported. Will try..." -n "${CT_CC_LANG_OTHERS}"
lang_opt=$(echo "${lang_opt},${CT_CC_LANG_OTHERS}" |sed -r -e 's/,+/,/g; s/,*$//;')
extra_config+=("--enable-languages=${lang_opt}")
extra_config+=("--disable-multilib")
for tmp in ARCH ABI CPU TUNE FPU FLOAT; do
eval tmp="\${CT_ARCH_WITH_${tmp}}"
if [ -n "${tmp}" ]; then
extra_config+=("${tmp}")
fi
done
[ "${CT_SHARED_LIBS}" = "y" ] || extra_config+=("--disable-shared")
[ -n "${CT_CC_PKGVERSION}" ] && extra_config+=("--with-pkgversion=${CT_CC_PKGVERSION}")
[ -n "${CT_CC_BUGURL}" ] && extra_config+=("--with-bugurl=${CT_CC_BUGURL}")
[ "${CT_CC_SJLJ_EXCEPTIONS_USE}" = "y" ] && extra_config+=("--enable-sjlj-exceptions")
[ "${CT_CC_SJLJ_EXCEPTIONS_DONT_USE}" = "y" ] && extra_config+=("--disable-sjlj-exceptions")
if [ "${CT_CC_CXA_ATEXIT}" = "y" ]; then
extra_config+=("--enable-__cxa_atexit")
else
extra_config+=("--disable-__cxa_atexit")
fi
if [ -n "${CC_ENABLE_CXX_FLAGS}" ]; then
extra_config+=("--enable-cxx-flags=${CC_ENABLE_CXX_FLAGS}")
fi
# When companion libraries are build static (eg !shared),
# the libstdc++ is not pulled automatically, although it
# is needed. Shoe-horn it in our LDFLAGS
if [ "${CT_COMPLIBS_SHARED}" != "y" ]; then
final_LDFLAGS='-lstdc++'
fi
if [ "${CT_CC_GCC_USE_GMP_MPFR}" = "y" ]; then
extra_config+=("--with-gmp=${CT_COMPLIBS_DIR}")
extra_config+=("--with-mpfr=${CT_COMPLIBS_DIR}")
fi
if [ "${CT_CC_GCC_USE_PPL_CLOOG_MPC}" = "y" ]; then
extra_config+=("--with-ppl=${CT_COMPLIBS_DIR}")
extra_config+=("--with-cloog=${CT_COMPLIBS_DIR}")
extra_config+=("--with-mpc=${CT_COMPLIBS_DIR}")
fi
if [ "${CT_CC_GCC_USE_LIBELF}" = "y" ]; then
extra_config+=("--with-libelf=${CT_COMPLIBS_DIR}")
fi
if [ "${CT_THREADS}" = "none" ]; then
extra_config+=("--disable-threads")
if [ "${CT_CC_GCC_4_2_or_later}" = y ]; then
extra_config+=("--disable-libgomp")
fi
else
extra_config+=("--enable-threads=posix")
fi
if [ "${CT_CC_GCC_ENABLE_TARGET_OPTSPACE}" = "y" ]; then
extra_config+=("--enable-target-optspace")
fi
CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'"
# --enable-symvers=gnu really only needed for sh4 to work around a
# detection problem only matters for gcc-3.2.x and later, I think.
# --disable-nls to work around crash bug on ppc405, but also because
# embedded systems don't really need message catalogs...
CC_FOR_BUILD="${CT_BUILD}-gcc" \
CFLAGS="${CT_CFLAGS_FOR_HOST}" \
LDFLAGS="${final_LDFLAGS}" \
CFLAGS_FOR_TARGET="${CT_TARGET_CFLAGS}" \
CXXFLAGS_FOR_TARGET="${CT_TARGET_CFLAGS}" \
LDFLAGS_FOR_TARGET="${CT_TARGET_LDFLAGS}" \
CT_DoExecLog ALL \
"${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/configure" \
--build=${CT_BUILD} \
--host=${CT_HOST} \
--target=${CT_TARGET} \
--prefix="${CT_PREFIX_DIR}" \
${CC_SYSROOT_ARG} \
"${extra_config[@]}" \
--with-local-prefix="${CT_SYSROOT_DIR}" \
--disable-nls \
--enable-symvers=gnu \
--enable-c99 \
--enable-long-long \
${CT_CC_EXTRA_CONFIG}
if [ "${CT_CANADIAN}" = "y" ]; then
CT_DoLog EXTRA "Building libiberty"
CT_DoExecLog ALL make ${PARALLELMFLAGS} all-build-libiberty
fi
CT_DoLog EXTRA "Building final compiler"
CT_DoExecLog ALL make ${PARALLELMFLAGS} all
CT_DoLog EXTRA "Installing final compiler"
CT_DoExecLog ALL make install
# Create a symlink ${CT_TARGET}-cc to ${CT_TARGET}-gcc to always be able
# to call the C compiler with the same, somewhat canonical name.
# check whether compiler has an extension
file="$( ls -1 "${CT_TARGET}/bin/${CT_TARGET}-gcc."* 2>/dev/null || true )"
[ -z "${file}" ] || ext=".${file##*.}"
CT_DoExecLog ALL ln -sv "${CT_TARGET}-gcc${ext}" "${CT_PREFIX_DIR}/bin/${CT_TARGET}-cc${ext}"
CT_EndStep
}
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