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|
# If yes, only static linking will be used
static_link="no"
# This is a list of default flags always supplied to configure
if [ x"$use_system_libs" = x"no" ]; then
default_configure_flags="\
--with-mpc=${local_builds}/destdir/${host} \
--with-mpfr=${local_builds}/destdir/${host} \
--with-gmp=${local_builds}/destdir/${host}"
else
default_configure_flags=""
fi
default_configure_flags="$default_configure_flags \
--with-gnu-as \
--with-gnu-ld \
"
# top-level flags
default_configure_flags="${default_configure_flags} \
--disable-libmudflap \
--enable-lto \
--enable-shared \
--without-included-gettext \
--enable-nls \
--with-system-zlib \
"
# gcc flags
default_configure_flags="${default_configure_flags} \
--disable-sjlj-exceptions \
--enable-gnu-unique-object \
--enable-linker-build-id \
"
# libstdc++ flags
# C99 is the latest standard, and has improved numerics support, so we want it
# http://en.wikipedia.org/wiki/C99
default_configure_flags="${default_configure_flags} \
--disable-libstdcxx-pch \
--enable-c99 \
--enable-clocale=gnu \
--enable-libstdcxx-debug \
--enable-long-long \
"
# Disable the Graphite loop optimizer as it's being deprecated
default_configure_flags="${default_configure_flags} --with-cloog=no --with-ppl=no --with-isl=no"
# libssp does stack protection
#default_configure_flags="${default_configure_flags} --enable-libssp"
# Used by fortran
# http://gcc.gnu.org/onlinedocs/libquadmath/
# default_configure_flags="${default_configure_flags} --disable-libquadmath"
# Transactional Memory, used for threading
# http://gcc.gnu.org/wiki/TransactionalMemory
#default_configure_flags="${default_configure_flags} --disable-libitm"
# Libatomic is a synchronization library
# http://www.hpl.hp.com/research/linux/atomic_ops/
#default_configure_flags="${default_configure_flags} --disable-libatomic"
# Enable multilib for bare-metal, since newlib supports it.
if echo "${gcc_override_configure}" | egrep -q -v 'multilib' ; then
case ${target} in
arm*-eabi*)
default_configure_flags="${default_configure_flags} --enable-multilib --with-multilib-list=${multilib_list}"
;;
aarch64*-*elf)
default_configure_flags="${default_configure_flags} --enable-multilib"
;;
*)
default_configure_flags="${default_configure_flags} --disable-multilib"
;;
esac
fi
# Enable errata support
aarch64_errata="--enable-fix-cortex-a53-835769 --enable-fix-cortex-a53-843419"
case ${target} in
aarch64*)
default_configure_flags="${default_configure_flags} ${aarch64_errata}"
;;
esac
# Default languages
languages="c,c++,fortran,lto"
default_makeflags="MAKEINFOFLAGS=--force"
# Add target specific flags
# We cannot change the defaut cpu/fpu/mode/arch/float settings for
# arm*-eabi* because we use --with-multilib-list=[a|rm]profile: the cases
# below only apply to *linux* configurations.
# floating-point abi/fpu
case ${target} in
arm*linux-gnueabihf)
default_configure_flags="${default_configure_flags} --with-float=hard"
# FPU (no --with-fpu for non-hf configurations, nor AArch64)
if echo "${gcc_override_configure}" | grep -q -v with-fpu ; then
case ${target} in
armv8l-*linux-gnueabihf)
default_configure_flags="${default_configure_flags} --with-fpu=neon-fp-armv8"
;;
arm*-*linux-gnueabihf)
default_configure_flags="${default_configure_flags} --with-fpu=vfpv3-d16"
;;
esac
fi
;;
arm*linux-gnueabi)
default_configure_flags="${default_configure_flags} --with-float=soft"
;;
esac
# mode (ARM, Thumb, ...)
case ${target} in
arm*linux*)
if echo "${gcc_override_configure}" | egrep -q -v 'with-mode' ; then
default_configure_flags="${default_configure_flags} --with-mode=thumb"
fi
;;
esac
# ARCH/CPU
case ${target} in
armv8l-*linux-gnueabihf)
if echo "${gcc_override_configure}" | egrep -q -v 'with-arch|with-cpu' ; then
default_configure_flags="${default_configure_flags} --with-arch=armv8-a"
fi
;;
arm*-*linux-gnueabi*)
if echo "${gcc_override_configure}" | egrep -q -v 'with-cpu|with-tune' ; then
default_configure_flags="${default_configure_flags} --with-tune=cortex-a9"
fi
if echo "${gcc_override_configure}" | egrep -q -v 'with-arch|with-cpu' ; then
default_configure_flags="${default_configure_flags} --with-arch=armv7-a"
fi
;;
aarch64*)
if echo "${gcc_override_configure}" | egrep -q -v 'with-arch|with-cpu' ; then
default_configure_flags="${default_configure_flags} --with-arch=armv8-a"
fi
;;
esac
# Add target OS specific flags
case ${target} in
# bare metal targets don't support threads.
arm*-eabi*|aarch64*elf)
default_configure_flags="${default_configure_flags} --enable-threads=no --disable-multiarch"
languages="c,c++,lto"
;;
*linux*)
# --enable-libstdcxx-time=yes requires a compiler able to link
# --without flags such as --specs, which is not the case for
# --aarch64-elf. That's why we enable this for *linux* targets
# --only.
default_configure_flags="${default_configure_flags} --enable-threads=posix --enable-multiarch --enable-libstdcxx-time=yes"
# Enable GNU IFUNCs starting with GCC6 toolchains.
# Previous toolchains remove this setting from their configurations.
# This is only supported by glibc, so assume it's only for linux
# targets. (this is not true if one builds a toolchain for *linux*
# target and forces newlib as libc)
default_configure_flags="${default_configure_flags} --enable-gnu-indirect-function"
;;
esac
# Other
case ${target} in
*-mingw32)
languages="c,c++"
# Cygwin doesn't support GCC plugins
default_configure_flags="${default_configure_flags} --disable-plugins"
;;
powerpc*-eabi|ppc)
default_configure_flags="${default_configure_flags}"
languages="c,c++,lto"
;;
esac
stage1_flags=""
stage2_flags=""
# When building a cross-compiler, we first build a minimal stage1
# compiler with many features disabled, then a full-featured stage2
# compiler.
if test x"${build}" != x"${target}"; then
# stage1_flags are used to build the initial C compiler, which is
# used to compile the C library. We disable most everything, as the
# second GCC build will be able to use the C library built with the
# first GCC build.
stage1_flags="$stage1_flags --disable-libssp --disable-libquadmath --disable-threads --without-headers --with-newlib --disable-libmudflap --disable-decimal-float --disable-libgomp --disable-libatomic --disable-libsanitizer --disable-plugins --disable-libitm --enable-languages=c,c++ --disable-libstdcxx --disable-libvtv --disable-shared"
case ${clibrary} in
glibc|eglibc)
stage1_flags="$stage1_flags --with-glibc-version=2.18"
# Convention for cross-toolchains is to install Glibc into
# libc/ directory inside sysroot.
# Set GCC's sysroot flag to $sysroot/libc so that the compiler
# can find C library's headers and libraries. GCC will search
# $sysroot automatically anyway, since that's where it installs
# compiler libraries.
stage2_flags="--with-sysroot=${sysroots}/libc"
;;
newlib)
# bare metal targets don't support threads.
stage2_flags="--with-sysroot=${sysroots} --with-newlib"
;;
*)
fixme "\${clibrary} not specified."
;;
esac
if test x"${with_languages}" != x"default"; then
languages="${with_languages}"
fi
else
# Native builds are easy, so build almost everything
if test x"${with_languages}" != x"default"; then
languages="${with_languages}"
else
languages="c,c++,go,objc,fortran"
fi
fi
# When building for a mingw host, supply pre-built libiconv and use GCC's
# internal zlib (otherwise no zlib to build against).
mingw_extraconf="--with-libiconv-prefix=${local_builds}/destdir/${host}/usr --with-system-zlib=no"
# stage2 flags are used for native builds too
if test x"${release}" = x; then
stage2_flags="${stage2_flags} --enable-checking=yes"
else
stage2_flags="${stage2_flags} --enable-checking=release"
fi
stage1_flags="$stage1_flags --disable-bootstrap"
if test x"${bootstrap}" = x"yes"; then
stage2_flags="${stage2_flags} --enable-bootstrap"
else
stage2_flags="${stage2_flags} --disable-bootstrap"
fi
# Add --with-build-config=<config>
if test x"${build_config}" != x; then
stage2_flags="${stage2_flags} --with-build-config=${build_config}"
fi
stage2_flags="${stage2_flags} --enable-languages=${languages}"
# Add the overrides
default_configure_flags="${default_configure_flags} ${gcc_override_configure}"
# This is a list of default flags always supplied to "make check".
runtest_flags=""
|
