GCC-11.2.0

Installation of GCC

The instructions below are intentionally performing a “bootstrap” process. Bootstrapping is needed for robustness and is highly recommended when upgrading the compilers version. To disable bootstrap anyways, add --disable-bootstrap to the ./configure options below.

As in LFS fix an issue breaking libasan.a identified upstream:

sed -e '/static.*SIGSTKSZ/d' \
    -e 's/return kAltStackSize/return SIGSTKSZ * 4/' \
    -i libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cpp

Install GCC by running the following commands:

case $(uname -m) in
  x86_64)
    sed -i.orig '/m64=/s/lib64/lib/' gcc/config/i386/t-linux64
  ;;
esac

mkdir build                                            &&
cd    build                                            &&

../configure                                           \
    --prefix=/usr                                      \
    --disable-multilib                                 \
    --with-system-zlib                                 \
    --enable-languages=c,c++,d,fortran,go,objc,obj-c++ &&
make

If you have installed additional packages such as Valgrind and GDB, the GCC part of the testsuite will run more tests than in LFS. Some of those will report FAIL and others XPASS (pass when expected to FAIL). As of gcc-11.1.0, about 90 FAIL occur in the “guality” suite, as well as miscellaneous failures throughout the rest of the test suite. If all the compilers above are built, there will be around 102 unexpected failures out of over 481,000 tests. To run the tests, issue:

ulimit -s 32768 &&
make -k check

The tests are very long, and the results may be hard to find in the logs, specially if you use parallel jobs with make. You can get a summary of the tests with:

../contrib/test_summary

A few tests, less than 20 out of about 450,000, will fail, but unless the failures are excessive, they can be ignored.

Now, as the root user:

make install &&

mkdir -pv /usr/share/gdb/auto-load/usr/lib              &&
mv -v /usr/lib/*gdb.py /usr/share/gdb/auto-load/usr/lib &&

chown -v -R root:root \
    /usr/lib/gcc/*linux-gnu/11.2.0/include{,-fixed}

rm -rf /usr/lib/gcc/$(gcc -dumpmachine)/11.2.0/include-fixed/bits/

Some packages expect to find the C preprocessor in /lib or may refer to the C compiler under the name cc. The following symbolic links are not needed if you have followed the LFS instructions, since they have been already created. If you do not have them on your system, issue as the root user:

ln -v -sf ../usr/bin/cpp /lib          &&
ln -v -sf gcc /usr/bin/cc              &&
install -v -dm755 /usr/lib/bfd-plugins &&
ln -sfv ../../libexec/gcc/$(gcc -dumpmachine)/11.2.0/liblto_plugin.so /usr/lib/bfd-plugins/