%general-entities; ]> Glibc cross tools, headers 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 Glibc has an issue cross-compiling the headers, where it can misdetect the capabilities of Binutils and decide they are inadequate. The following line fixes this: echo "libc_cv_initfini_array=yes" >> config.cache CC=gcc ../glibc-&glibc-version;/configure --prefix=/tools \ --host=${LFS_TARGET} --build=${LFS_HOST} \ --disable-sanity-checks --enable-kernel=2.6.0 \ --with-headers=/tools/include --cache-file=config.cache \ --with-binutils=/cross-tools/${LFS_TARGET}/bin Any error message you see about nptl at this point can safely be ignored. CC=gcc Tells GLIBC to use the hosts GCC compiler. --build=${LFS_HOST} When used with --host, this creates a cross-architecture executable that creates files for ${LFS_TARGET} but runs on ${LFS_HOST). --host=${LFS_TARGET} When used with --build, this creates a cross-architecture executable that creates files for ${LFS_TARGET} but runs on ${LFS_HOST). --disable-sanity-checks This switch disables any checks that are in place. --enable-kernel=2.6.0 This tells Glibc to compile the library with support for 2.6.x Linux kernels. --with-headers=/tools/include This tells Glibc to compile itself against the headers recently installed to the /tools directory, so that it knows exactly what features the kernel has and can optimize itself accordingly. --with-binutils=/cross-tools/${LFS_TARGET}/bin This tells GLIBC to use the binutils for our specific target architecture. 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 /tools/include: install -d /tools/include/bits cp bits/stdio_lim.h /tools/include/bits Now we will create a blank stub file: touch /tools/include/gnu/stubs.h For NPTL we use the following command: cp ../glibc-&glibc-version;/nptl/sysdeps/pthread/pthread.h /tools/include/ Now we copy the architecture specific header over: cp ../glibc-&glibc-version;/nptl/sysdeps/unix/sysv/linux/i386/bits/pthreadtypes.h /tools/include/bits/