5.15. EGLIBC-2.13

The EGLIBC 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.

5.15.1. Installation of EGLIBC

It should be noted that compiling EGLIBC in any way other than the method suggested in this book puts the stability of the system at risk.

MIPS is not supported in the main EGLIBC tree, so we need the eglibc-ports tarball. After entering the EGLIBC source dir, unpack eglibc-ports-2.13 and rename the directory it creates so that EGLIBC's build system can find it:

tar -jxvf ../eglibc-ports-2.13.tar.bz2
mv -v eglibc-ports-2.13 ports

Disable linking to libgcc_eh:

cp -v Makeconfig{,.orig}
sed -e 's/-lgcc_eh//g' Makeconfig.orig > Makeconfig

The EGLIBC documentation recommends building EGLIBC outside of the source directory in a dedicated build directory:

mkdir -v ../eglibc-build
cd ../eglibc-build

The following lines need to be added to config.cache for EGLIBC to support NPTL:

cat > config.cache << "EOF"

Prepare EGLIBC for compilation:

BUILD_CC="gcc" CC="${CLFS_TARGET}-gcc" \
    AR="${CLFS_TARGET}-ar" RANLIB="${CLFS_TARGET}-ranlib" \
    ../eglibc-2.13/configure --prefix=/tools \
    --host=${CLFS_TARGET} --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 \

The meaning of the new configure options:


This sets EGLIBC to use the current compiler on our system. This is used to create the tools EGLIBC uses during its build.


This forces EGLIBC to use the GCC compiler that we made for our target architecture.


This forces EGLIBC to use the ar utility we made for our target architecture.


This forces EGLIBC 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 EGLIBC to utilize all add-ons that are available.


This tells EGLIBC to use Thread Local Storage.


This tells EGLIBC to compile the library with support for 2.6.x Linux kernels.


This tells EGLIBC to use use the __thread for libc and libpthread builds.


This tells EGLIBC to use the Binutils that are specific to our target architecture.


This tells EGLIBC 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.


This tells EGLIBC 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:


Install the package:

make install

Details on this package are located in Section 10.7.5, “Contents of EGLIBC.”