Details on this package are located in Section 10.8.5, “Contents of Glibc.”
The Glibc package contains the main C library. This library provides the basic routines for allocating memory, searching directories, opening and closing files, reading and writing files, string handling, pattern matching, arithmetic, and so on.
It should be noted that compiling Glibc in any way other than the method suggested in this book puts the stability of the system at risk.
Disable linking to libgcc_eh:
patch -Np1 -i ../glibc-2.4-libgcc_eh-1.patch
The following patch fixes an issue that can cause localdef to segfault:
patch -Np1 -i ../glibc-2.4-localedef_segfault-1.patch
The following sed fixes a build issue with Glibc. This will prevent nscd from trying to link to libraries that don't exist:
cp -v nscd/Makefile{,.orig}
sed -e "/nscd_stat.o: sysincludes = # nothing/d" nscd/Makefile.orig > \
nscd/Makefile
The kernel's asm-ppc and asm-ppc64 headers were merged into asm-powerpc during 2.6.15. Glibc for powerpc installs a version of procfs.h which looks for the __PPC64_ELF_H symbol to determine if it is running on powerpc64. That symbol disappeared in the merge, its replacement does not indicate if the machine is running as 64 bit. The absence of the original symbol causes the 32-bit definitions to be used, which leads to compilation failure early in 64-bit glibc when an incompatible kernel definition is included. The following sed will correct this, we need to repeat it every time we install either size of glibc.
cp -v sysdeps/unix/sysv/linux/powerpc/sys/procfs.h{,.orig}
sed 's/__PPC64_ELF_H/__powerpc64__/' \
sysdeps/unix/sysv/linux/powerpc/sys/procfs.h.orig \
> sysdeps/unix/sysv/linux/powerpc/sys/procfs.h
The Glibc documentation recommends building Glibc outside of the source directory in a dedicated build directory:
mkdir -v ../glibc-build cd ../glibc-build
The following lines need to be added to config.cache for Glibc to support NPTL:
echo "libc_cv_forced_unwind=yes" > config.cache echo "libc_cv_c_cleanup=yes" >> config.cache
Prepare Glibc for compilation:
BUILD_CC="gcc" CC="${CLFS_TARGET}-gcc ${BUILD32}" \
AR="${CLFS_TARGET}-ar" RANLIB="${CLFS_TARGET}-ranlib" \
../glibc-2.4/configure --prefix=/tools \
--host=${CLFS_TARGET32} --build=${CLFS_HOST} \
--disable-profile --enable-add-ons \
--with-tls --enable-kernel=2.6.0 --with-__thread \
--with-binutils=/cross-tools/bin --with-headers=/tools/include \
--cache-file=config.cache
The meaning of the new configure options:
This sets Glibc to use the current compiler on our system. This is used to create the tools Glibc uses during its build.
Forces Glibc to utilize our target architecture GCC utilizing the 32 Bit flags.
This forces Glibc to use the ar utility we made for our target architecture.
This forces Glibc to use the ranlib utility we made for our target architecture.
This builds the libraries without profiling information. Omit this option if profiling on the temporary tools is necessary.
This tells Glibc to utilize all add-ons that are available.
This tells Glibc to use Thread Local Storage.
This tells Glibc to use use the __thread for libc and libpthread builds.
This tells Glibc to use the Binutils that are specific to our target architecture.
This tells Glibc to utilize a premade cache file.
During this stage the following warning might appear:
configure: WARNING: *** These auxiliary programs are missing or *** incompatible versions: msgfmt *** some features will be disabled. *** Check the INSTALL file for required versions.
The missing or incompatible msgfmt program is generally harmless. This msgfmt program is part of the Gettext package which the host distribution should provide.
Compile the package:
make
Install the package:
make install
Details on this package are located in Section 10.8.5, “Contents of Glibc.”