crosstool-ng/scripts/build/libc/glibc.sh
Norbert Lange bd0ea7ed21 prevent the glibc build from overwriting flags
The glibc will append the content of the CFLAGS variable,
overriding previous flags.
If unset, the CFLAGS variable is not empty, so explicitly set it.
Instead prepend the default CFLAGS flags.

Signed-off-by: Norbert Lange <nolange79@gmail.com>
2019-10-27 23:12:25 +01:00

565 lines
24 KiB
Bash

# This file adds functions to build glibc
# Copyright 2007 Yann E. MORIN
# Licensed under the GPL v2. See COPYING in the root of this package
glibc_get()
{
local date
local version
CT_Fetch GLIBC
if [ "${CT_GLIBC_USE_PORTS_EXTERNAL}" = "y" ]; then
CT_Fetch GLIBC_PORTS
fi
return 0
}
glibc_extract()
{
CT_ExtractPatch GLIBC
if [ "${CT_GLIBC_USE_PORTS_EXTERNAL}" = "y" ]; then
CT_ExtractPatch GLIBC_PORTS
# This may create a bogus symlink if glibc-ports is using custom
# sources or has an overlay (and glibc is shared). However,
# we do not support concurrent use of the source directory
# and next run, if using different glibc-ports source, will override
# this symlink anyway.
CT_DoExecLog ALL ln -sf "${CT_SRC_DIR}/${CT_GLIBC_PORTS_DIR_NAME}" \
"${CT_SRC_DIR}/${CT_GLIBC_DIR_NAME}/ports"
fi
}
# Build and install headers and start files
glibc_start_files()
{
# Start files and Headers should be configured the same way as the
# final libc, but built and installed differently.
glibc_backend libc_mode=startfiles
}
# This function builds and install the full C library
glibc_main()
{
glibc_backend libc_mode=final
}
# This backend builds the C library once for each multilib
# variant the compiler gives us
# Usage: glibc_backend param=value [...]
# Parameter : Definition : Type : Default
# libc_mode : 'startfiles' or 'final' : string : (none)
glibc_backend()
{
local libc_mode
local arg
for arg in "$@"; do
eval "${arg// /\\ }"
done
case "${libc_mode}" in
startfiles)
CT_DoStep INFO "Installing C library headers & start files"
;;
final)
CT_DoStep INFO "Installing C library"
;;
*)
CT_Abort "Unsupported (or unset) libc_mode='${libc_mode}'"
;;
esac
CT_mkdir_pushd "${CT_BUILD_DIR}/build-libc-${libc_mode}"
CT_IterateMultilibs glibc_backend_once multilib libc_mode="${libc_mode}"
CT_Popd
CT_EndStep
}
# This backend builds the C library once
# Usage: glibc_backend_once param=value [...]
# Parameter : Definition : Type
# libc_mode : 'startfiles' or 'final' : string : (empty)
# multi_* : as defined in CT_IterateMultilibs : (varies) :
glibc_backend_once()
{
local multi_flags multi_dir multi_os_dir multi_root multi_index multi_count multi_target
local build_cflags build_cppflags build_ldflags
local startfiles_dir
local src_dir="${CT_SRC_DIR}/glibc"
local -a extra_config
local -a extra_make_args
local glibc_cflags
local arg opt
for arg in "$@"; do
eval "${arg// /\\ }"
done
CT_DoStep INFO "Building for multilib ${multi_index}/${multi_count}: '${multi_flags}'"
# Ensure sysroot (with suffix, if applicable) exists
CT_DoExecLog ALL mkdir -p "${multi_root}"
# Adjust target tuple according GLIBC quirks
CT_DoArchGlibcAdjustTuple multi_target
# Glibc seems to be smart enough to know about the cases that can coexist
# in the same root and installs them into proper multilib-os directory; all
# we need is to point to the right root. We do need to handle multilib-os
# here, though, for the first pass where we install crt*.o and a dummy
# libc.so; we therefore install it to the most specific location of
# <sysroot>/<suffix>/usr/lib/<multilib-os> where it is least likely to clash
# with other multilib variants. We then remove these temporary files at
# the beginning of the libc-final step and allow glibc to install them
# where it thinks is proper.
startfiles_dir="${multi_root}/usr/lib/${multi_os_dir}"
CT_SanitizeVarDir startfiles_dir
if [ "${libc_mode}" = "final" ]; then
CT_DoLog EXTRA "Cleaning up start files"
CT_DoExecLog ALL rm -f "${startfiles_dir}/crt1.o" \
"${startfiles_dir}/crti.o" \
"${startfiles_dir}/crtn.o" \
"${startfiles_dir}/libc.so"
fi
CT_DoLog EXTRA "Configuring C library"
# Also, if those two are missing, iconv build breaks
extra_config+=( --disable-debug --disable-sanity-checks )
if [ "${CT_GLIBC_ENABLE_OBSOLETE_RPC}" = "y" ]; then
extra_config+=( --enable-obsolete-rpc )
fi
# Add some default glibc config options if not given by user.
# We don't need to be conditional on whether the user did set different
# values, as they CT_GLIBC_EXTRA_CONFIG_ARRAY is passed after
# extra_config
extra_config+=("$(glibc_min_kernel_config)")
case "${CT_THREADS}" in
nptl) extra_config+=("--with-__thread" "--with-tls");;
linuxthreads) extra_config+=("--with-__thread" "--without-tls" "--without-nptl");;
none) extra_config+=("--without-__thread" "--without-nptl")
case "${CT_GLIBC_EXTRA_CONFIG_ARRAY[*]}" in
*-tls*) ;;
*) extra_config+=("--without-tls");;
esac
;;
esac
# FIXME static version of glibc seems to be broken:
# build tries to use libc-modules.h which is generated from
# soversions.i, which is only created for builds with shared libs.
case "${CT_SHARED_LIBS}" in
y) extra_config+=("--enable-shared");;
*) extra_config+=("--disable-shared");;
esac
if [ "${CT_GLIBC_DISABLE_VERSIONING}" = "y" ]; then
extra_config+=("--disable-versioning")
fi
if [ "${CT_GLIBC_OLDEST_ABI}" != "" ]; then
extra_config+=("--enable-oldest-abi=${CT_GLIBC_OLDEST_ABI}")
fi
case "$(glibc_add_ons_list ,)" in
"") extra_config+=("--enable-add-ons=no");;
*) extra_config+=("--enable-add-ons=$(glibc_add_ons_list ,)");;
esac
[ "${CT_GLIBC_ENABLE_WERROR}" != "y" ] && extra_config+=("--disable-werror")
[ -n "${CT_PKGVERSION}" ] && extra_config+=("--with-pkgversion=${CT_PKGVERSION}")
[ -n "${CT_TOOLCHAIN_BUGURL}" ] && extra_config+=("--with-bugurl=${CT_TOOLCHAIN_BUGURL}")
if [ -n "${CT_GLIBC_SSP}" ]; then
extra_config+=("--enable-stack-protector=${CT_GLIBC_SSP}")
fi
touch config.cache
# Until it became explicitly controllable with --enable-stack-protector=...,
# configure detected GCC support for -fstack-protector{,-strong} and
# tried to enable it in some parts of glibc - which then failed to build.
if [ -z "${CT_GLIBC_BUILD_SSP}" ]; then
echo "libc_cv_ssp=no" >>config.cache
echo "libc_cv_ssp_strong=no" >>config.cache
fi
if [ "${CT_GLIBC_FORCE_UNWIND}" = "y" ]; then
echo "libc_cv_forced_unwind=yes" >>config.cache
echo "libc_cv_c_cleanup=yes" >>config.cache
fi
# Pre-seed the configparms file with values from the config option
printf "%s\n" "${CT_GLIBC_CONFIGPARMS}" > configparms
# glibc can't be built without -O2 (reference needed!)
glibc_cflags+=" -g -O2"
case "${CT_GLIBC_ENABLE_FORTIFIED_BUILD}" in
y) ;;
*) glibc_cflags+=" -U_FORTIFY_SOURCE";;
esac
# In the order of increasing precedence. Flags common to compiler and linker.
glibc_cflags+=" ${CT_ALL_TARGET_CFLAGS}"
glibc_cflags+=" ${CT_GLIBC_EXTRA_CFLAGS}"
glibc_cflags+=" ${multi_flags}"
# Analyze the resulting options for any extra configure switches to throw in.
for opt in ${glibc_cflags}; do
case ${opt} in
-mhard-float|-mfloat-abi=hard|-mfloat-abi=softfp|-mno-soft-float|-mfpu)
extra_config+=("--with-fp")
;;
-msoft-float|-mfloat-abi=soft|-mno-float|-mno-fpu)
extra_config+=("--without-fp")
;;
esac
done
CT_DoArchGlibcAdjustConfigure extra_config "${glibc_cflags}"
# ./configure is mislead by our tools override wrapper for bash
# so just tell it where the real bash is _on_the_target_!
# Notes:
# - ${ac_cv_path_BASH_SHELL} is only used to set BASH_SHELL
# - ${BASH_SHELL} is only used to set BASH
# - ${BASH} is only used to set the shebang
# in two scripts to run on the target
# So we can safely bypass bash detection at compile time.
# Should this change in a future glibc release, we'd better
# directly mangle the generated scripts _after_ they get built,
# or even after they get installed...
echo "ac_cv_path_BASH_SHELL=/bin/bash" >>config.cache
CT_SymlinkToolsMultilib
# Configure with --prefix the way we want it on the target...
# There are a whole lot of settings here. You'll probably want
# to read up on what they all mean, and customize a bit, possibly
# by setting GLIBC_EXTRA_CONFIG_ARRAY.
# Compare these options with the ones used when installing
# the glibc headers above - they're different.
# Adding "--without-gd" option to avoid error "memusagestat.c:36:16:
# gd.h: No such file or directory"
# See also http://sources.redhat.com/ml/libc-alpha/2000-07/msg00024.html.
# Set BUILD_CC, or we won't be able to build datafiles
# Run explicitly through CONFIG_SHELL, or the build breaks badly (loop-of-death)
# when the shell is not bash... Sigh... :-(
CT_DoLog DEBUG "Configuring with addons : '$(glibc_add_ons_list ,)'"
CT_DoLog DEBUG "Extra config args passed : '${extra_config[*]}'"
CT_DoLog DEBUG "Extra CFLAGS passed : '${glibc_cflags}'"
CT_DoLog DEBUG "Placing startfiles into : '${startfiles_dir}'"
CT_DoLog DEBUG "Configuring with --host : '${multi_target}'"
# CFLAGS are only applied when compiling .c files. .S files are compiled with ASFLAGS,
# but they are not passed by configure. Thus, pass everything in CC instead.
# The CFLAGS variable needs to be cleared, else the default "-g -O2"
# would override previous flags.
CT_DoExecLog CFG \
BUILD_CC=${CT_BUILD}-gcc \
CC="${CT_TARGET}-${CT_CC} ${glibc_cflags}" \
CFLAGS="" \
AR=${CT_TARGET}-ar \
RANLIB=${CT_TARGET}-ranlib \
"${CONFIG_SHELL}" \
"${src_dir}/configure" \
--prefix=/usr \
--build=${CT_BUILD} \
--host=${multi_target} \
--cache-file="$(pwd)/config.cache" \
--without-cvs \
--disable-profile \
--without-gd \
--with-headers="${CT_HEADERS_DIR}" \
"${extra_config[@]}" \
"${CT_GLIBC_EXTRA_CONFIG_ARRAY[@]}"
# build hacks
# Mask C++ compiler. Glibc 2.29+ attempts to build some tests using gcc++, but
# we haven't built libstdc++ yet. Should really implement #808 after 1.24.0...
extra_make_args+=( CXX= )
case "${CT_ARCH},${CT_ARCH_CPU}" in
powerpc,8??)
# http://sourceware.org/ml/crossgcc/2008-10/msg00068.html
CT_DoLog DEBUG "Activating support for memset on broken ppc-8xx (CPU15 erratum)"
extra_make_args+=( ASFLAGS="-DBROKEN_PPC_8xx_CPU15" )
;;
esac
build_cflags="${CT_CFLAGS_FOR_BUILD}"
build_cppflags=
build_ldflags="${CT_LDFLAGS_FOR_BUILD}"
case "$CT_BUILD" in
*mingw*|*cygwin*|*msys*|*darwin*|*freebsd*)
# When installing headers on Cygwin, Darwin, MSYS2 and MinGW-w64 sunrpc needs
# gettext for building cross-rpcgen.
build_cppflags="${build_cppflags} -I${CT_BUILDTOOLS_PREFIX_DIR}/include/"
build_ldflags="${build_ldflags} -lintl -liconv"
case "$CT_BUILD" in
*cygwin*|*freebsd*)
# Additionally, stat in FreeBSD, Cygwin, and possibly others
# is always 64bit, so replace struct stat64 with stat.
build_cppflags="${build_cppflags} -Dstat64=stat"
;;
esac
;;
esac
extra_make_args+=( "BUILD_CFLAGS=${build_cflags}" )
extra_make_args+=( "BUILD_CPPFLAGS=${build_cppflags}" )
extra_make_args+=( "BUILD_LDFLAGS=${build_ldflags}" )
if [ "${libc_mode}" = "startfiles" -a ! -r "${multi_root}/.libc_headers_installed" ]; then
CT_DoLog EXTRA "Installing C library headers"
CT_DoExecLog ALL touch "${multi_root}/.libc_headers_installed"
# use the 'install-headers' makefile target to install the
# headers
CT_DoExecLog ALL make ${CT_JOBSFLAGS} \
install_root=${multi_root} \
install-bootstrap-headers=yes \
"${extra_make_args[@]}" \
install-headers
# Two headers -- stubs.h and features.h -- aren't installed by install-headers,
# so do them by hand. We can tolerate an empty stubs.h for the moment.
# See e.g. http://gcc.gnu.org/ml/gcc/2002-01/msg00900.html
mkdir -p "${CT_HEADERS_DIR}/gnu"
CT_DoExecLog ALL touch "${CT_HEADERS_DIR}/gnu/stubs.h"
CT_DoExecLog ALL cp -v "${CT_SRC_DIR}/glibc/include/features.h" \
"${CT_HEADERS_DIR}/features.h"
# Building the bootstrap gcc requires either setting inhibit_libc, or
# having a copy of stdio_lim.h... see
# http://sources.redhat.com/ml/libc-alpha/2003-11/msg00045.html
CT_DoExecLog ALL cp -v bits/stdio_lim.h "${CT_HEADERS_DIR}/bits/stdio_lim.h"
# Following error building gcc-4.0.0's gcj:
# error: bits/syscall.h: No such file or directory
# solved by following copy; see http://sourceware.org/ml/crossgcc/2005-05/msg00168.html
# but it breaks arm, see http://sourceware.org/ml/crossgcc/2006-01/msg00091.html
# Of course, only copy it if it does not already exist
case "${CT_ARCH}" in
arm) ;;
*) if [ -f "${CT_HEADERS_DIR}/bits/syscall.h" ]; then
CT_DoLog ALL "Not over-writing existing bits/syscall.h"
elif [ -f "misc/bits/syscall.h" ]; then
CT_DoExecLog ALL cp -v "misc/bits/syscall.h" \
"${CT_HEADERS_DIR}/bits/syscall.h"
else
# "Old" glibces do not have the above file,
# but provide this one:
CT_DoExecLog ALL cp -v "misc/syscall-list.h" \
"${CT_HEADERS_DIR}/bits/syscall.h"
fi
;;
esac
elif [ "${libc_mode}" = "final" -a -r "${multi_root}/.libc_headers_installed" ]; then
CT_DoExecLog ALL rm -f "${multi_root}/.libc_headers_installed"
fi # installing headers
if [ "${libc_mode}" = "startfiles" ]; then
if [ "${CT_THREADS}" = "nptl" ]; then
CT_DoLog EXTRA "Installing C library start files"
# there are a few object files needed to link shared libraries,
# which we build and install by hand
CT_DoExecLog ALL mkdir -p "${startfiles_dir}"
CT_DoExecLog ALL make ${CT_JOBSFLAGS} \
"${extra_make_args[@]}" \
csu/subdir_lib
CT_DoExecLog ALL cp csu/crt1.o csu/crti.o csu/crtn.o \
"${startfiles_dir}"
# Finally, 'libgcc_s.so' requires a 'libc.so' to link against.
# However, since we will never actually execute its code,
# it doesn't matter what it contains. So, treating '/dev/null'
# as a C source file, we produce a dummy 'libc.so' in one step
CT_DoExecLog ALL "${CT_TARGET}-${CT_CC}" ${multi_flags} \
-nostdlib \
-nostartfiles \
-shared \
-x c /dev/null \
-o "${startfiles_dir}/libc.so"
fi # threads == nptl
fi # libc_mode = startfiles
if [ "${libc_mode}" = "final" ]; then
CT_DoLog EXTRA "Building C library"
CT_DoExecLog ALL make ${CT_JOBSFLAGS} \
"${extra_make_args[@]}" \
all
CT_DoLog EXTRA "Installing C library"
CT_DoExecLog ALL make ${CT_JOBSFLAGS} \
"${extra_make_args[@]}" \
install_root="${multi_root}" \
install
if [ "${CT_BUILD_MANUALS}" = "y" -a "${multi_index}" = "${multi_count}" ]; then
# We only need to build the manuals once. Only build them on the
# last multilib target. If it's not multilib, it will happen on the
# only target.
CT_DoLog EXTRA "Building and installing the C library manual"
# Omit CT_JOBSFLAGS as GLIBC has problems building the
# manuals in parallel
CT_DoExecLog ALL make pdf html
CT_DoExecLog ALL mkdir -p ${CT_PREFIX_DIR}/share/doc
CT_DoExecLog ALL cp -av manual/*.pdf \
manual/libc \
${CT_PREFIX_DIR}/share/doc
fi
if [ "${CT_GLIBC_LOCALES}" = "y" -a "${multi_index}" = "${multi_count}" ]; then
glibc_locales
fi
fi # libc_mode = final
CT_EndStep
}
# Build up the addons list, separated with $1
glibc_add_ons_list()
{
local sep="$1"
local addons_list
if [ "${CT_GLIBC_USE_PORTS_ADDON}" = "y" ]; then
addons_list="${addons_list}${sep}ports"
fi
if [ "${CT_GLIBC_USE_NPTL_ADDON}" = "y" ]; then
addons_list="${addons_list}${sep}nptl"
fi
if [ "${CT_GLIBC_USE_LIBIDN_ADDON}" = "y" ]; then
addons_list="${addons_list}${sep}libidn"
fi
echo "${addons_list#${sep}}" # Remove leading separator if any
}
# Compute up the minimum supported Linux kernel version
glibc_min_kernel_config()
{
local min_kernel_config
case "${CT_GLIBC_EXTRA_CONFIG_ARRAY[*]}" in
*--enable-kernel*) ;;
*) if [ "${CT_GLIBC_KERNEL_VERSION_AS_HEADERS}" = "y" ]; then
# TBD do we support that currently? We always seem to install kernel headers
# We can't rely on the kernel version from the configuration,
# because it might not be available if the user uses pre-installed
# headers. On the other hand, both method will have the kernel
# version installed in "usr/include/linux/version.h" in the sysroot.
# Parse that instead of having two code-paths.
version_code_file="${CT_SYSROOT_DIR}/usr/include/linux/version.h"
if [ ! -f "${version_code_file}" -o ! -r "${version_code_file}" ]; then
CT_Abort "Linux version is unavailable in installed headers files"
fi
version_code="$(grep -E LINUX_VERSION_CODE "${version_code_file}" \
|cut -d' ' -f 3 \
)"
version=$(((version_code>>16)&0xFF))
patchlevel=$(((version_code>>8)&0xFF))
sublevel=$((version_code&0xFF))
min_kernel_config="${version}.${patchlevel}.${sublevel}"
elif [ "${CT_GLIBC_KERNEL_VERSION_CHOSEN}" = "y" ]; then
# Trim the fourth part of the linux version, keeping only the first three numbers
min_kernel_config="$( echo "${CT_GLIBC_MIN_KERNEL_VERSION}" \
|sed -r -e 's/^([^.]+\.[^.]+\.[^.]+)(|\.[^.]+)$/\1/;' \
)"
fi
echo "--enable-kernel=${min_kernel_config}"
;;
esac
}
# Build and install the libc locales
glibc_locales()
{
local src_dir="${CT_SRC_DIR}/glibc"
local -a extra_config
local glibc_cflags
# To build locales, we'd need to build glibc for the build machine.
# Bail out if the host is not supported.
case "${CT_BUILD}" in
*-cygwin|*-darwin*)
CT_DoLog EXTRA "Skipping GNU libc locales: incompatible build machine"
return
;;
esac
mkdir -p "${CT_BUILD_DIR}/build-localedef"
cd "${CT_BUILD_DIR}/build-localedef"
CT_DoLog EXTRA "Configuring C library localedef"
# Versions that don't support --with-pkgversion or --with-bugurl will cause
# a harmless: `configure: WARNING: unrecognized options: --with-bugurl...`
# If it's set, use it, if is a recognized option.
if [ ! "${CT_TOOLCHAIN_PKGVERSION}" = "" ]; then
[ -n "${CT_PKGVERSION}" ] && extra_config+=("--with-pkgversion=${CT_PKGVERSION}")
fi
if [ ! "${CT_TOOLCHAIN_BUGURL}" = "" ]; then
[ -n "${CT_TOOLCHAIN_BUGURL}" ] && extra_config+=("--with-bugurl=${CT_TOOLCHAIN_BUGURL}")
fi
CT_DoLog DEBUG "Extra config args passed: '${extra_config[*]}'"
glibc_cflags="-O2 -fno-stack-protector"
case "${CT_GLIBC_ENABLE_FORTIFIED_BUILD}" in
y) ;;
*) glibc_cflags+=" -U_FORTIFY_SOURCE";;
esac
# ./configure is misled by our tools override wrapper for bash
# so just tell it where the real bash is _on_the_target_!
# Notes:
# - ${ac_cv_path_BASH_SHELL} is only used to set BASH_SHELL
# - ${BASH_SHELL} is only used to set BASH
# - ${BASH} is only used to set the shebang
# in two scripts to run on the target
# So we can safely bypass bash detection at compile time.
# Should this change in a future glibc release, we'd better
# directly mangle the generated scripts _after_ they get built,
# or even after they get installed...
echo "ac_cv_path_BASH_SHELL=/bin/bash" >>config.cache
# Configure with --prefix the way we want it on the target...
CT_DoExecLog CFG \
CFLAGS="${glibc_cflags}" \
${CONFIG_SHELL} \
"${src_dir}/configure" \
--prefix=/usr \
--cache-file="$(pwd)/config.cache" \
--without-cvs \
--disable-profile \
--without-gd \
--disable-debug \
--disable-sanity-checks \
"${extra_config[@]}"
CT_DoLog EXTRA "Building C library localedef"
CT_DoExecLog ALL make ${CT_JOBSFLAGS}
# The target's endianness and uint32_t alignment should be passed as options
# to localedef, but glibc's localedef does not support these options, which
# means that the locale files generated here will be suitable for the target
# only if it has the same endianness and uint32_t alignment as the host's.
CT_DoLog EXTRA "Installing C library locales"
CT_DoExecLog ALL make ${CT_JOBSFLAGS} \
install_root="${CT_SYSROOT_DIR}" \
localedata/install-locales
}