6.6. GCC-4.1.1

To make sure that a couple of tools use the proper syntax, apply the following patch:

patch -Np1 -i ../gcc-4.1.1-posix-1.patch

The following patch fixes the searching of multilib dirs for specs file.The patch standardizes the gcc drivers path iteration functions, ensuring multilib directories are searched in the correct order. This fixes various issues, most noticably with libtool on multilib systems:

patch -Np1 -i ../gcc-4.1.1-PR20425-1.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:

cp libiberty/Makefile.in{,.orig}
sed 's/install_to_$(INSTALL_DEST) //' libiberty/Makefile.in.orig > libiberty/Makefile.in

GCC provides a gccbug script which detects at compile time whether mktemp is present, and hardcodes the result in a test. If mktemp is not found, the script will fall back to using less random names for temporary files. We will be installing mktemp later, so the following sed will simulate its presence:

cp gcc/gccbug.in{,.orig}
sed 's/@have_mktemp_command@/yes/' gcc/gccbug.in.orig > gcc/gccbug.in

The fixincludes attempts to "fix" the system headers installed so far. Since gcc is cross-compiled expecting the system headers to be in /usr/include the script will be looking at host headers. The following sed prevents the fixincludes script from running:

cp gcc/Makefile.in{,.orig}
sed 's@\./fixinc\.sh@-c true@' gcc/Makefile.in.orig > gcc/Makefile.in

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

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

Prepare GCC for compilation:

../gcc-4.1.1/configure --prefix=/usr --libexecdir=/usr/lib \
    --build=${CLFS_HOST} --host=${CLFS_TARGET} --target=${CLFS_TARGET} \
    --enable-shared --enable-threads=posix --enable-__cxa_atexit \
    --enable-c99 --enable-long-long --enable-clocale=gnu \
    --enable-languages=c,c++ --disable-libstdcxx-pch

Compile the package:

make

Install the package:

make DESTDIR=${CLFS} install

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

ln -sv ../usr/bin/cpp ${CLFS}/lib

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

ln -sv gcc ${CLFS}/usr/bin/cc