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
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:
AR=ar LDFLAGS="-Wl,-rpath,/cross-tools/lib" \ ../gcc-4.8.1/configure --prefix=/cross-tools \ --build=${CLFS_HOST} --target=${CLFS_TARGET} --host=${CLFS_HOST} \ --with-sysroot=${CLFS} --with-local-prefix=/tools \ --with-native-system-header-dir=/tools/include --disable-nls \ --enable-shared --disable-static --enable-languages=c,c++ \ --enable-__cxa_atexit --enable-c99 --enable-long-long --enable-threads=posix \ --disable-multilib --with-mpc=/cross-tools --with-mpfr=/cross-tools \ --with-gmp=/cross-tools --with-cloog=/cross-tools \ --enable-cloog-backend=isl --with-isl=/cross-tools \ --disable-isl-version-check --with-system-zlib --enable-checking=release \ --enable-libstdcxx-time
The meaning of the new configure options:
--enable-languages=c,c++
This option ensures that only the C and C++ compilers are built.
--enable-__cxa_atexit
This option allows use of __cxa_atexit, rather than atexit, to register C++ destructors for local statics and global objects and is essential for fully standards-compliant handling of destructors. It also affects the C++ ABI and therefore results in C++ shared libraries and C++ programs that are interoperable with other Linux distributions.
--enable-c99
Enable C99 support for C programs.
--enable-long-long
Enables long long support in the compiler.
--enable-threads=posix
This enables C++ exception handling for multi-threaded code.
Continue with compiling the package:
make AS_FOR_TARGET="${CLFS_TARGET}-as" \ LD_FOR_TARGET="${CLFS_TARGET}-ld"
Install the package:
make install
Details on this package are located in Section 10.16.2, “Contents of GCC.”