Details on this package are located in Section 5.8.5, “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.
The following sed removes a dependency of gcc 3.4.x from the Glibc we are using in Cross-LFS. The reason we are changing it is because this only installs the headers; no compiling takes place. In the next Glibc chapter, we use the GCC that's built right after this chapter.
cp configure{,.orig}
sed -e 's/3.4/3.[0-9]/g' configure.orig > configure
This architecture is no longer supported in the main glibc tree, so we have to extract the glibc-ports-2.5 package into our glibc-2.5 directory. Then we move ports to the location expected by our build and patches:
tar -jxvf ../glibc-ports-2.5.tar.bz2 mv -v glibc-ports-2.5 ports
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 echo "libc_cv_arm_tls=yes" >> config.cache
The following line needs to be added to configparms to adjust installation paths:
echo "install_root=${CLFS}" > configparms
Prepare Glibc for compilation:
CC=gcc ../glibc-2.5/configure --prefix=/usr \
--host=${CLFS_TARGET} --build=${CLFS_HOST} \
--with-headers=${CLFS}/usr/include --cache-file=config.cache
The meaning of the configure options:
Tells Glibc to use the hosts GCC compiler.
This tells Glibc to compile itself against the headers recently installed to the ${CLFS}/usr/include directory, so that it knows exactly what features the kernel has and can optimize itself accordingly.
Now, install the headers:
make install-headers
Some files aren't installed by the above command, so we will copy the additional header files we need.
First we will copy a common file over to ${CLFS}/usr/include:
install -dv ${CLFS}/usr/include/bits
cp -v bits/stdio_lim.h ${CLFS}/usr/include/bits
Now we will create a blank stub file:
touch ${CLFS}/usr/include/gnu/stubs.h
Another header is needed for NPTL:
cp -v ../glibc-2.5/ports/sysdeps/unix/sysv/linux/arm/nptl/bits/pthreadtypes.h \
${CLFS}/usr/include/bits
Details on this package are located in Section 5.8.5, “Contents of Glibc.”