Details on this package are located in Section 10.9.2, “Contents of GCC.”
5.7. Cross GCC-4.1.1 - Static
The GCC package contains the GNU compiler collection, which includes the C and C++ compilers.
5.7.1. Installation of Cross GCC Compiler with Static libgcc and no Threads
Make a couple of essential adjustments to the specs file to ensure GCC uses our build environment:
patch -Np1 -i ../gcc-4.1.1-pure64_specs-1.patch
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 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
Change the StartFile Spec to point to the correct library location:
echo " #undef STARTFILE_PREFIX_SPEC #define STARTFILE_PREFIX_SPEC \"/tools/lib/\"" >> gcc/config/sparc/linux.h echo " #undef STARTFILE_PREFIX_SPEC #define STARTFILE_PREFIX_SPEC \"/tools/lib/\"" >> gcc/config/sparc/linux64.h
Now alter gcc's c preprocessor's default include search path to use /tools only:
cp -v gcc/Makefile.in{,.orig}
sed -e "s@\(^CROSS_SYSTEM_HEADER_DIR =\).*@\1 /tools/include@g" \
gcc/Makefile.in.orig > gcc/Makefile.in
![[Important]](../images/important.png)
Important
The above modifications are critical in ensuring a successful overall build. Do not forget to apply them.
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=/cross-tools \
--host=${CLFS_HOST} --target=${CLFS_TARGET} --disable-multilib \
--with-local-prefix=/tools --disable-nls --disable-shared \
--disable-threads --enable-languages=c
The meaning of the configure options:
- --with-local-prefix=/tools
-
The purpose of this switch is to remove /usr/local/include from gcc's include search path. This is not absolutely essential, however, it helps to minimize the influence of the host system.
- --disable-shared
-
Disables the creation of the shared libraries.
- --disable-threads
-
This will prevent GCC from looking for the multi-thread include files, since they haven't been created for this architecture yet. GCC will be able to find the multi-thread information after the Glibc headers are created.
- --enable-languages=c
-
This option ensures that only the C compiler is built.
Continue with compiling the package:
make CFLAGS_FOR_TARGET="${GCCTARGET}" all-gcc
Install the package:
make install-gcc