6.14. GCC-3.4.3

This package is known to have issues when its default optimization flags (including the -march and -mcpu options) are changed. If any environment variables that override default optimizations have been defined, such as CFLAGS and CXXFLAGS, unset them when building GCC.

Apply only the No-Fixincludes patch (not the Specs patch) also used in the previous chapter:

patch -Np1 -i ../gcc-3.4.3-no_fixincludes-1.patch

GCC fails to compile some packages outside of a base Linux From Scratch install (e.g., Mozilla and kdegraphics) when used in conjunction with newer versions of Binutils. Apply the following patch to fix this issue:

patch -Np1 -i ../gcc-3.4.3-linkonce-1.patch

Apply a sed substitution that will suppress the installation of libiberty.a. The version of libiberty.a provided by Binutils will be used instead:

sed -i 's/install_to_$(INSTALL_DEST) //' libiberty/Makefile.in

The GCC documentation recommends building GCC outside of the source directory in a dedicated build directory:

mkdir ../gcc-build
cd ../gcc-build

Prepare GCC for compilation:

../gcc-3.4.3/configure --prefix=/usr \
    --libexecdir=/usr/lib --enable-shared \
    --enable-threads=posix --enable-__cxa_atexit \
    --enable-clocale=gnu --enable-languages=c,c++

Compile the package:

make

Test the results, but do not stop at errors:

make -k check

Some of the errors are known issues and were noted in the previous chapter. The test suite notes from Section 5.11, “GCC-3.4.3 - Pass 2,” are still relevant here. Be sure to refer back to them as necessary.

Install the package:

make install

Some packages expect the C preprocessor to be installed in the /lib directory. To support those packages, create this symlink:

ln -s ../usr/bin/cpp /lib

Many packages use the name cc to call the C compiler. To satisfy those packages, create a symlink:

ln -s gcc /usr/bin/cc