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Fold libc_start_files into libc

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After 557b9d4, libc_start_files and libc_main steps are performed one
after another. It doesn't make sense, especially since some of the libcs
(glibc, uClibc-ng) go to great lengths to first install start files in
the first step, libc_start_files, only to remove them immediately in the
second step, libc_main.

Current build steps also break in the xtensa newlib configurations, as
it needs to install the custom xtensa headers before building the libgcc
and after 557b9d4, the headers are not installed before libgcc is built
in pass-1.

Therefore, finish what 557b9d4 mentioned but did not do: move header
installation into a new step, libc_headers, and combine libc_start_files
and libc_main into a single step.

This also allows to combine the core pass-1/pass-2 steps, to be done in
a subsequent commit.

Signed-off-by: Alexey Neyman <stilor@att.net>
This commit is contained in:
Alexey Neyman 2022-02-08 15:52:48 -08:00
parent c320d220d6
commit 93be629f2b
9 changed files with 78 additions and 333 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
ct-ng.in
View File

@ -268,6 +268,7 @@ build.%:
# but are actual steps for canadian and cross-native.
# Please keep the last line with a '\' and keep the following empty line:
# it helps when diffing and merging.
# TBD move kernel headers and unify pass_1/pass_2?
CT_STEPS := \
companion_tools_for_build \
companion_libs_for_build \
@ -275,9 +276,9 @@ CT_STEPS := \
companion_tools_for_host \
companion_libs_for_host \
binutils_for_host \
libc_headers \
cc_core_pass_1 \
kernel_headers \
libc_start_files \
cc_core_pass_2 \
libc_main \
cc_for_build \

6
scripts/build/libc.sh
View File

@ -6,7 +6,7 @@
# The actual implementation can override just what it needs then.
eval "${CT_LIBC//[^A-Za-z0-9]/_}_get() { CT_Fetch \"\${CT_LIBC_${CT_LIBC_CHOICE_KSYM}_PKG_KSYM}\"; }"
eval "${CT_LIBC//[^A-Za-z0-9]/_}_extract() { CT_ExtractPatch \"\${CT_LIBC_${CT_LIBC_CHOICE_KSYM}_PKG_KSYM}\"; }"
for _m in start_files main post_cc; do
for _m in headers main post_cc; do
eval "${CT_LIBC//[^A-Za-z0-9]/_}_${_m}() { :; }"
done
@ -23,9 +23,9 @@ do_libc_extract()
eval "${CT_LIBC//[^A-Za-z0-9]/_}_extract"
}
do_libc_start_files()
do_libc_headers()
{
eval "${CT_LIBC//[^A-Za-z0-9]/_}_start_files"
eval "${CT_LIBC//[^A-Za-z0-9]/_}_headers"
}
do_libc_main()

2
scripts/build/libc/bionic.sh
View File

@ -3,7 +3,7 @@
# Licensed under the GPL v2. See COPYING in the root of this package
# Install Unified headers
bionic_start_files()
bionic_headers()
{
CT_DoStep INFO "Installing C library headers"
CT_DoExecLog ALL cp -r "${CT_SRC_DIR}/android-ndk/sysroot/usr" "${CT_SYSROOT_DIR}"

143
scripts/build/libc/glibc.sh
View File

@ -30,48 +30,14 @@ glibc_extract()
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="${libc_mode}"
CT_mkdir_pushd "${CT_BUILD_DIR}/build-libc"
CT_IterateMultilibs glibc_backend_once multilib
CT_Popd
CT_EndStep
}
@ -79,13 +45,14 @@ glibc_backend()
# 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()
{
# 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.
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="${CT_SRC_DIR}/glibc"
local -a extra_config
local -a extra_make_args
@ -104,29 +71,9 @@ glibc_backend_once()
# Adjust target tuple according GLIBC quirks
CT_DoArchGlibcAdjustTuple multi_target
# Glibc seems to be smart enough to know about the cases that can coexist
# in the same root and installs them into proper multilib-os directory; all
# we need is to point to the right root. We do need to handle multilib-os
# here, though, for the first pass where we install crt*.o and a dummy
# libc.so; we therefore install it to the most specific location of
# <sysroot>/<suffix>/usr/lib/<multilib-os> where it is least likely to clash
# with other multilib variants. We then remove these temporary files at
# the beginning of the libc-final step and allow glibc to install them
# where it thinks is proper.
startfiles_dir="${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
# If those two are missing, iconv build breaks
extra_config+=( --disable-debug --disable-sanity-checks )
if [ "${CT_GLIBC_ENABLE_OBSOLETE_RPC}" = "y" ]; then
@ -259,7 +206,6 @@ glibc_backend_once()
CT_DoLog DEBUG "Configuring with addons : '$(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,
@ -324,82 +270,6 @@ glibc_backend_once()
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[@]}" \
@ -428,7 +298,6 @@ glibc_backend_once()
if [ "${CT_GLIBC_LOCALES}" = "y" -a "${multi_index}" = "${multi_count}" ]; then
glibc_locales
fi
fi # libc_mode = final
CT_EndStep
}

2
scripts/build/libc/mingw-w64.sh
View File

@ -9,7 +9,7 @@ mingw_w64_set_install_prefix()
fi
}
mingw_w64_start_files() {
mingw_w64_headers() {
local -a sdk_opts
CT_DoStep INFO "Installing C library headers"

4
scripts/build/libc/moxiebox.sh
View File

@ -14,9 +14,9 @@ moxiebox_extract()
CT_ExtractPatch MOXIEBOX
}
moxiebox_start_files()
moxiebox_headers()
{
newlib_start_files
newlib_headers
}
moxiebox_main()

61
scripts/build/libc/musl.sh
View File

@ -2,42 +2,18 @@
# Copyright 2013 Timo Teräs
# Licensed under the GPL v2. See COPYING in the root of this package
# Build and install headers and start files
musl_start_files()
musl_post_cc()
{
# Start files and Headers should be configured the same way as the
# final libc, but built and installed differently.
musl_backend libc_mode=startfiles
}
# This function builds and install the full C library
musl_main()
{
musl_backend libc_mode=final
}
musl_post_cc() {
# MUSL creates dynamic linker symlink with absolute path - which works on the
# target but not on the host. We want our cross-ldd tool to work.
CT_MultilibFixupLDSO
}
musl_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 musl_backend_once multilib libc_mode="${libc_mode}"
musl_main()
{
CT_DoStep INFO "Installing C library"
CT_mkdir_pushd "${CT_BUILD_DIR}/build-libc"
CT_IterateMultilibs musl_backend_once multilib
CT_Popd
CT_EndStep
}
@ -45,9 +21,9 @@ musl_backend() {
# This backend builds the C library
# Usage: musl_backend param=value [...]
# Parameter : Definition : Type : Default
# libc_mode : 'startfiles' or 'final' : string : (none)
musl_backend_once() {
local libc_mode
# multi_* : as defined in CT_IterateMultilibs : (varies) :
musl_backend_once()
{
local -a extra_cflags
local -a extra_config
local src_dir="${CT_SRC_DIR}/musl"
@ -110,24 +86,6 @@ musl_backend_once() {
--disable-gcc-wrapper \
"${extra_config[@]}"
if [ "${libc_mode}" = "startfiles" ]; then
CT_DoLog EXTRA "Installing C library headers"
CT_DoExecLog ALL make DESTDIR="${multi_root}" install-headers
CT_DoLog EXTRA "Building C library start files"
CT_DoExecLog ALL make DESTDIR="${multi_root}" \
obj/crt/crt1.o obj/crt/crti.o obj/crt/crtn.o
CT_DoLog EXTRA "Installing C library start files"
CT_DoExecLog ALL cp -av obj/crt/crt*.o "${multi_root}${multilib_dir}"
CT_DoExecLog ALL ${CT_TARGET}-${CT_CC} -nostdlib \
-nostartfiles -shared -x c /dev/null -o "${multi_root}${multilib_dir}/libc.so"
fi
if [ "${libc_mode}" = "final" ]; then
CT_DoLog EXTRA "Cleaning up start files"
CT_DoExecLog ALL rm -f "${multi_root}${multilib_dir}/crt1.o" \
"${multi_root}${multilib_dir}/crti.o" \
"${multi_root}${multilib_dir}/crtn.o" \
"${multi_root}${multilib_dir}/libc.so"
CT_DoLog EXTRA "Building C library"
CT_DoExecLog ALL make ${CT_JOBSFLAGS}
@ -148,7 +106,6 @@ musl_backend_once() {
# Any additional actions for this architecture
CT_DoArchMUSLPostInstall
fi
CT_EndStep
}

7
scripts/build/libc/newlib.sh
View File

@ -5,11 +5,10 @@
# Edited by Martin Lund <mgl@doredevelopment.dk>
#
newlib_start_files()
newlib_headers()
{
CT_DoStep INFO "Installing C library headers & start files"
CT_DoExecLog ALL cp -a "${CT_SRC_DIR}/newlib/newlib/libc/include/." \
"${CT_HEADERS_DIR}"
CT_DoStep INFO "Installing C library headers"
CT_DoExecLog ALL cp -a "${CT_SRC_DIR}/newlib/newlib/libc/include/." "${CT_HEADERS_DIR}"
if [ "${CT_ARCH_XTENSA}" = "y" ]; then
CT_DoLog EXTRA "Installing Xtensa headers"
CT_DoExecLog ALL cp -r "${CT_SRC_DIR}/newlib/newlib/libc/sys/xtensa/include/." \

87
scripts/build/libc/uClibc-ng.sh
View File

@ -2,38 +2,12 @@
# Copyright 2007 Yann E. MORIN
# Licensed under the GPL v2. See COPYING in the root of this package
# Build and install headers and start files
uClibc_ng_start_files()
{
# Start files and Headers should be configured the same way as the
# final libc, but built and installed differently.
uClibc_ng_backend libc_mode=startfiles
}
# This function builds and install the full C library
uClibc_ng_main()
{
uClibc_ng_backend libc_mode=final
}
# Common backend for 1st and 2nd passes.
uClibc_ng_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 uClibc_ng_backend_once multilib libc_mode="${libc_mode}"
CT_DoStep INFO "Installing C library"
CT_mkdir_pushd "${CT_BUILD_DIR}/build-libc"
CT_IterateMultilibs uClibc_ng_backend_once multilib
CT_Popd
CT_EndStep
}
@ -41,7 +15,6 @@ uClibc_ng_backend()
# Common backend for 1st and 2nd passes, once per multilib.
uClibc_ng_backend_once()
{
local libc_mode
local multi_dir multi_os_dir multi_root multi_flags multi_index multi_count
local multilib_dir startfiles_dir
local jflag=${CT_JOBSFLAGS}
@ -129,65 +102,11 @@ uClibc_ng_backend_once()
CT_DoExecLog ALL cp -a "${multi_root}/usr/include" "${multi_root}/usr/include.saved"
fi
if [ "${libc_mode}" = "startfiles" ]; then
CT_DoLog EXTRA "Building headers"
CT_DoExecLog ALL make "${make_args[@]}" headers
# Ensure the directory for installing multilib-specific binaries exists.
CT_DoExecLog ALL mkdir -p "${startfiles_dir}"
CT_DoLog EXTRA "Installing headers"
CT_DoExecLog ALL make "${make_args[@]}" install_headers
# The check might look bogus, but it is the same condition as is used
# by GCC build script to enable/disable shared library support.
if [ "${CT_THREADS}" = "nptl" ]; then
CT_DoLog EXTRA "Building start files"
CT_DoExecLog ALL make ${jflag} "${make_args[@]}" \
lib/crt1.o lib/crti.o lib/crtn.o
if [ "${CT_SHARED_LIBS}" = "y" ]; then
# From: http://git.openembedded.org/cgit.cgi/openembedded/commit/?id=ad5668a7ac7e0436db92e55caaf3fdf782b6ba3b
# libm.so is needed for ppc, as libgcc is linked against libm.so
# No problem to create it for other archs.
CT_DoLog EXTRA "Building dummy shared libs"
CT_DoExecLog ALL "${CT_TARGET}-${CT_CC}" -nostdlib -nostartfiles \
-shared ${multi_flags} -x c /dev/null -o libdummy.so
CT_DoLog EXTRA "Installing start files"
CT_DoExecLog ALL install -m 0644 lib/crt1.o lib/crti.o lib/crtn.o \
"${startfiles_dir}"
CT_DoLog EXTRA "Installing dummy shared libs"
CT_DoExecLog ALL install -m 0755 libdummy.so "${startfiles_dir}/libc.so"
CT_DoExecLog ALL install -m 0755 libdummy.so "${startfiles_dir}/libm.so"
fi # CT_SHARED_LIBS == y
fi # CT_THREADS == nptl
fi # libc_mode == startfiles
if [ "${libc_mode}" = "final" ]; then
CT_DoLog EXTRA "Cleaning up startfiles"
CT_DoExecLog ALL rm -f "${startfiles_dir}/crt1.o" \
"${startfiles_dir}/crti.o" \
"${startfiles_dir}/crtn.o" \
"${startfiles_dir}/libc.so" \
"${startfiles_dir}/libm.so"
CT_DoLog EXTRA "Building C library"
CT_DoExecLog ALL make "${make_args[@]}" pregen
CT_DoExecLog ALL make ${jflag} "${make_args[@]}" all
# YEM-FIXME:
# - we want to install 'runtime' files, eg. lib*.{a,so*}, crti.o and
# such files, except the headers as they already are installed
# - "make install_dev" installs the headers, the crti.o... and the
# static libs, but not the dynamic libs
# - "make install_runtime" installs the dynamic libs only
# - "make install" calls install_runtime and install_dev
# - so we're left with re-installing the headers... Sigh...
CT_DoLog EXTRA "Installing C library"
CT_DoExecLog ALL make "${make_args[@]}" install install_utils
fi # libc_mode == final
# Now, if installing headers into a subdirectory, put everything in its place.
# Remove the header subdirectory if it existed already.