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39-gcc.sh
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#!/bin/bash
# QQ群：111601117、钉钉群：35948877
# 避免chroot后执行
id lfs >/dev/null 2>&1
if [ $? = 0 ]; then
source `dirname ${BASH_SOURCE[0]}`/lfs.sh
cp -v ${BASH_SOURCE[0]} $LFS/task.sh
sed "s/_LFS_VERSION/$(getConf LFS_VERSION)/g" -i $LFS/task.sh
sed "s/_LFS_BUILD_PROC/$LFS_BUILD_PROC/g" -i $LFS/task.sh
source `dirname ${BASH_SOURCE[0]}`/chroot.sh
rm -fv $LFS/task.sh
exit
fi
# 来自chroot之后的调用
pushd /sources/_LFS_VERSION
PKG_NAME=gcc
PKG_PATH=$(find stage4 -maxdepth 1 -type d -name "$PKG_NAME-*")
if [ -z $PKG_PATH ]; then
tar -xpvf $(find . -maxdepth 1 -type f -name "$PKG_NAME-*.tar.*") --directory stage4
PKG_PATH=$(find stage4 -maxdepth 1 -type d -name "$PKG_NAME-*")
pushd $PKG_PATH
tar -xpvf $(find ../.. -maxdepth 1 -type f -name mpfr-*.tar.*)
mv -v $(find . -maxdepth 1 -type d -name "mpfr-*") mpfr
tar -xpvf $(find ../.. -maxdepth 1 -type f -name gmp-*.tar.*)
mv -v $(find . -maxdepth 1 -type d -name "gmp-*") gmp
tar -xpvf $(find ../.. -maxdepth 1 -type f -name mpc-*.tar.*)
mv -v $(find . -maxdepth 1 -type d -name "mpc-*") mpc
# 在 x86_64 上构建时，修改存放 64 位库的默认路径为 “lib”:
case $(uname -m) in
x86_64)
sed -e '/m64=/s/lib64/lib/' \
-i.orig gcc/config/i386/t-linux64
;;
esac
echo "---确认---"
diff gcc/config/i386/t-linux64.orig gcc/config/i386/t-linux64
echo "------"
sleep 5
popd
fi
if [ ! -f $PKG_PATH/build/_BUILD_DONE ]; then
mkdir -pv $PKG_PATH/build
pushd $PKG_PATH
cd build
../configure --prefix=/usr \
LD=ld \
--enable-languages=c,c++ \
--disable-multilib \
--disable-bootstrap \
--with-system-zlib
[ $? = 0 ] && make -j_LFS_BUILD_PROC
if [ $? = 0 ]; then
# 运行测试前要增加栈空间
ulimit -s 32768
# 以非特权用户身份测试编译结果，但出错时继续执行其他测试
chown -Rv tester .
su tester -c "PATH=$PATH make -j_LFS_BUILD_PROC -k check"
# 查看测试结果
# 对比：https://www.linuxfromscratch.org/lfs/build-logs/
../contrib/test_summary | grep -A7 Summ
read -p "$PKG_NAME CHECK DONE..."
fi
[ $? = 0 ] && make install
if [ $? = 0 ]; then
# 修正安装的头文件目录 (及其内容) 不正确的所有权
chown -v -R root:root \
/usr/lib/gcc/$(gcc -dumpmachine)/12.2.0/include{,-fixed}
# 创建一个 FHS 因 “历史原因” 要求的符号链接
ln -svr /usr/bin/cpp /usr/lib
# 创建一个兼容性符号链接，以支持在构建程序时使用链接时优化 (LTO)
ln -sfv ../../libexec/gcc/$(gcc -dumpmachine)/12.2.0/liblto_plugin.so \
/usr/lib/bfd-plugins/
# 确认编译和链接像我们期望的一样正常工作
echo 'int main(){}' > dummy.c
cc dummy.c -v -Wl,--verbose &> dummy.log
# 输出 [Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]
echo ------
readelf -l a.out | grep ': /lib'
# 确认我们的设定能够使用正确的启动文件
# 输出
# /usr/lib/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../lib/crt1.o succeeded
# /usr/lib/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../lib/crti.o succeeded
# /usr/lib/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../lib/crtn.o succeeded
echo ------
grep -o '/usr/lib.*/crt[1in].*succeeded' dummy.log
# 确认编译器能正确查找头文件
# 输出
# /usr/lib/gcc/x86_64-pc-linux-gnu/12.2.0/include
# /usr/local/include
# /usr/lib/gcc/x86_64-pc-linux-gnu/12.2.0/include-fixed
# /usr/include
echo ------
grep -B4 '^ /usr/include' dummy.log
# 确认新的链接器使用了正确的搜索路径
# 输出
# SEARCH_DIR("/usr/x86_64-pc-linux-gnu/lib64")
# SEARCH_DIR("/usr/local/lib64")
# SEARCH_DIR("/lib64")
# SEARCH_DIR("/usr/lib64")
# SEARCH_DIR("/usr/x86_64-pc-linux-gnu/lib")
# SEARCH_DIR("/usr/local/lib")
# SEARCH_DIR("/lib")
# SEARCH_DIR("/usr/lib");
echo ------
grep 'SEARCH.*/usr/lib' dummy.log |sed 's|; |\n|g'
# 确认我们使用了正确的 libc
# 输出 attempt to open /usr/lib/libc.so.6 succeeded
echo ------
grep "/lib.*/libc.so.6 " dummy.log
# 确认 GCC 使用了正确的动态链接器
# 输出 found ld-linux-x86-64.so.2 at /usr/lib/ld-linux-x86-64.so.2
echo ------
grep found dummy.log
# 删除测试文件
read -p "这里出现的任何问题在继续构建前都必须解决，耐心的检查日志..."
rm -v dummy.c a.out dummy.log
# 移动一个位置不正确的文件
mkdir -pv /usr/share/gdb/auto-load/usr/lib
mv -v /usr/lib/*gdb.py /usr/share/gdb/auto-load/usr/lib
read -p "$PKG_NAME ALL DONE..."
touch _BUILD_DONE
else
pwd
exit 1
fi
popd
fi
popd