%general-entities; ]> uClibc cross tools By default uClibc symlinks the headers to the source directory. This is not acceptable in our build scenario, so we modify the Makefiles so that the headers will be copied instead: cp Makefile Makefile.orig sed -e 's/$(LN) -fs/cp/g' Makefile.orig > Makefile for file in `find libc/sysdeps/linux -name Makefile`; do cp $file $file.orig sed -e 's/$(LN) -fs/cp/g' -e 's@../libc/@$(TOPDIR)libc/@g' $file.orig > $file done Below we are just telling uClibc to use its default configuration. For those for more adventureous, you can use make menuconfig, and do a more custom build for your uClibc installation. Create the default configuration: make defconfig We will need to edit the configuration file, to make sure everything gets compiled and put into its proper location: cp .config .config.orig sed -e "/^CROSS_COMPILER_PREFIX/s:=.*:=\"${CLFS_TARGET}-\":" \ -e "/^KERNEL_SOURCE/s:=.*:=\"${CLFS}/usr\":" \ -e "/^SHARED_LIB_LOADER_PREFIX/s:=.*:=\"/lib\":" \ -e "/^DEVEL_PREFIX/s:=.*:=\"/usr\":" \ -e "/^RUNTIME_PREFIX/s:=.*:=\"/\":" \ .config.orig > .config We will need to make sure that some settings in uClibc are set so we can utilize all the features of BusyBox: UCLIBC_OPTIONS="DO_C99_MATH UCLIBC_HAS_RPC UCLIBC_HAS_CTYPE_CHECKED UCLIBC_HAS_WCHAR UCLIBC_HAS_HEXADECIMAL_FLOATS UCLIBC_HAS_FOPEN_EXCLUSIVE_MODE UCLIBC_HAS_PRINTF_M_SPEC UCLIBC_HAS_FTW UCLIBC_HAS_IPV6" for config in $UCLIBC_OPTIONS; do cp .config .config.orig sed -e "s:# ${config} is not set:${config}=y:" .config.orig > .config done echo "UCLIBC_HAS_FULL_RPC=y" >> .config We have made some changes to our config, let's make sure that we didn't miss and dependencies: make TARGET_ARCH=i386 oldconfig Compile the package: make TARGET_ARCH=i386 The uClibc build system creates symlinks in its include directory pointing to ${CLFS}/usr/include. We will need to remove these symlinks from the source dir: rm include/{asm,asm-generic,linux} Install the package: make PREFIX=${CLFS} install Installed uClibc To Be Written