The GCC package contains the GNU compiler collection, which includes the C and C++ compilers.
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 is needed for GCC to build against uClibc:
patch -Np1 -i ../gcc-4.1.1-uclibc-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
The following patch ensures that gcc does not search the /usr directory for libgcc_s.so when cross-compiling:
patch -Np1 -i ../gcc-4.1.1-cross_search_paths-1.patch
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=${CLFS}/cross-tools \
--host=${CLFS_HOST} --target=${CLFS_TARGET} --disable-multilib \
--with-sysroot=${CLFS} --disable-nls --enable-shared \
--enable-languages=c --enable-__cxa_atexit \
--enable-c99 --enable-long-long --enable-threads=posix
The meaning of the new configure options:
This option ensures that only the C compiler is built. If the C++ compiler is needed, use --enable-languages=c,c++
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 support for C programs.
Enables long long support in the compiler.
This enables C++ exception handling for multi-threaded code.
Continue with compiling the package:
make
Install the package:
make install