%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{,.orig} sed -e 's/$(LN) -fs/cp/g' Makefile.orig > Makefile for file in `find libc/sysdeps/linux -name Makefile`; do cp $file{,.orig} sed -e 's/$(LN) -fs/cp/g' -e 's@../libc/@$(TOPDIR)libc/@g' \ $file.orig > $file done Below we are just telling uClibc to use its default configuration. For those for more adventureous, you can use make menuconfig, and do a more custom build for your uClibc installation. Create the default configuration: make defconfig ARCH=i386 We will need to edit the configuration file, to make sure everything gets compiled and put into its proper location: cp .config{,.orig} sed -e "/^CROSS_COMPILER_PREFIX/s:=.*:=\"${CLFS_TARGET}-\":" \ -e "/^KERNEL_HEADERS/s:=.*:=\"${CLFS}/usr/include\":" \ -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 LDSO_PRELOAD_FILE_SUPPORT UCLIBC_HAS_FOPEN_EXCLUSIVE_MODE UCLIBC_HAS_PRINTF_M_SPEC UCLIBC_HAS_IPV6 UCLIBC_HAS_GLIBC_CUSTOM_PRINTF UCLIBC_USE_NETLINK UCLIBC_HAS_FTW" for config in $UCLIBC_OPTIONS; do cp .config{,.orig} sed -e "s:# ${config} is not set:${config}=y:" .config.orig > .config done UCLIBC_OPTIONS="UCLIBC_HAS_CTYPE_UNSAFE" for config in $UCLIBC_OPTIONS; do cp .config{,.orig} sed -e "s:${config}=y:# ${config} is not set:" .config.orig > .config done echo "UCLIBC_HAS_FULL_RPC=y" >> .config echo "UCLIBC_HAS_REENTRANT_RPC=y" >> .config We have made some changes to our config, let's make sure that we didn't miss and dependencies: make oldconfig Compile the package: make CC="${CC} ${BUILD}" Install the package: make PREFIX=${CLFS} install Installed uClibc To Be Written