Details on this package are located in Section 10.16.2, “Contents of GCC.”
The GCC package contains the GNU compiler collection, which includes the C and C++ compilers.
The following patch contains a number of updates to the 4.8.1 branch by the GCC developers:
patch -Np1 -i ../gcc-4.8.1-branch_update-3.patch
Make a couple of essential adjustments to the specs file to ensure GCC uses our build
environment:
patch -Np1 -i ../gcc-4.8.1-pure64_specs-1.patch
Change the StartFile Spec so that GCC looks in /tools:
echo -en '\n#undef STANDARD_STARTFILE_PREFIX_1\n#define STANDARD_STARTFILE_PREFIX_1 "/tools/lib/"\n' >> gcc/config/rs6000/sysv4.h echo -en '\n#undef STANDARD_STARTFILE_PREFIX_2\n#define STANDARD_STARTFILE_PREFIX_2 ""\n' >> gcc/config/rs6000/sysv4.h
Apply a sed subsitution that will suppress the execution of the fixincludes script:
cp -v 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
Before starting to build GCC, remember to unset any environment variables that override the default optimization flags.
Prepare GCC for compilation:
CC="${CC} ${BUILD64}" CXX="${CXX} ${BUILD64}" \
../gcc-4.8.1/configure --prefix=/tools --disable-multilib \
--build=${CLFS_HOST} --host=${CLFS_TARGET} --target=${CLFS_TARGET} \
--libexecdir=/tools/lib --with-local-prefix=/tools --enable-long-long \
--enable-c99 --enable-shared --enable-threads=posix --disable-nls \
--enable-__cxa_atexit --enable-languages=c,c++ --disable-libstdcxx-pch \
--enable-cloog-backend=isl --with-gmp=/tools --with-mpfr=/tools \
--with-mpc=/tools --with-isl=/tools --disable-isl-version-check \
--with-cloog=/tools --with-system-zlib \
--with-native-system-header-dir=/tools/include --enable-checking=release \
--enable-libstdcxx-time
The meaning of the new configure options:
CXX="${CXX}
${BUILD64}"
This forces the C++ compiler to use our 64 Bit flags.
--disable-libstdcxx-pch
Do not build the pre-compiled header (PCH) for libstdc++. It takes up a lot of space, and
we have no use for it.
The following will prevent GCC from looking in the wrong directories for headers and libraries:
cp -v Makefile{,.orig}
sed "/^HOST_\(GMP\|ISL\|CLOOG\)\(LIBS\|INC\)/s:/tools:/cross-tools:g" \
Makefile.orig > Makefile
Compile the package:
make AS_FOR_TARGET="${AS}" \
LD_FOR_TARGET="${LD}"
Install the package:
make install
Details on this package are located in Section 10.16.2, “Contents of GCC.”