# This file declares functions to install the uClibc C library # Copyright 2007 Yann E. MORIN # Licensed under the GPL v2. See COPYING in the root of this package # This is a constant because it does not change very often. # We're in 2010, and are still using data from 7 years ago. uclibc_locales_version=030818 uclibc_locale_tarball="uClibc-locale-${uclibc_locales_version}" if [ "${CT_LIBC_UCLIBC_NG}" = "y" ]; then uclibc_name="uClibc-ng" libc_src="http://downloads.uclibc-ng.org/releases/${CT_LIBC_VERSION}" else uclibc_name="uClibc" libc_src="http://www.uclibc.org/downloads http://www.uclibc.org/downloads/old-releases" fi # Download uClibc do_libc_get() { if [ "${CT_LIBC_UCLIBC_CUSTOM}" = "y" ]; then CT_GetCustom "${uclibc_name}" "${CT_LIBC_UCLIBC_CUSTOM_VERSION}" \ "${CT_LIBC_UCLIBC_CUSTOM_LOCATION}" else CT_GetFile "${uclibc_name}-${CT_LIBC_VERSION}" ${libc_src} fi # uClibc locales if [ "${CT_LIBC_UCLIBC_LOCALES_PREGEN_DATA}" = "y" ]; then CT_GetFile "${uclibc_locale_tarball}" ${libc_src} fi return 0 } # Extract uClibc do_libc_extract() { CT_Extract "${uclibc_name}-${CT_LIBC_VERSION}" CT_Patch "${uclibc_name}" "${CT_LIBC_VERSION}" # uClibc locales # Extracting pregen locales ourselves is kinda # broken, so just link it in place... if [ "${CT_LIBC_UCLIBC_LOCALES_PREGEN_DATA}" = "y" \ -a ! -f "${CT_SRC_DIR}/.${uclibc_locale_tarball}.extracted" ]; then CT_Pushd "${CT_SRC_DIR}/${uclibc_name}-${CT_LIBC_VERSION}/extra/locale" CT_DoExecLog ALL ln -s "${CT_TARBALLS_DIR}/${uclibc_locale_tarball}.tgz" . CT_Popd touch "${CT_SRC_DIR}/.${uclibc_locale_tarball}.extracted" fi return 0 } # Build and install headers and start files do_libc_start_files() { # Start files and Headers should be configured the same way as the # final libc, but built and installed differently. do_libc_backend libc_mode=startfiles } # This function builds and install the full C library do_libc() { do_libc_backend libc_mode=final } # Common backend for 1st and 2nd passes. do_libc_backend() { local libc_mode local arg for arg in "$@"; do eval "${arg// /\\ }" done case "${libc_mode}" in startfiles) CT_DoStep INFO "Installing C library headers & start files";; final) CT_DoStep INFO "Installing C library";; *) CT_Abort "Unsupported (or unset) libc_mode='${libc_mode}'";; esac CT_mkdir_pushd "${CT_BUILD_DIR}/build-libc-${libc_mode}" CT_IterateMultilibs do_libc_backend_once multilib libc_mode="${libc_mode}" CT_Popd CT_EndStep } # Common backend for 1st and 2nd passes, once per multilib. do_libc_backend_once() { local libc_mode local multi_dir multi_os_dir multi_root multi_flags multi_index multi_count local multilib_dir startfiles_dir local jflag=${CT_LIBC_UCLIBC_PARALLEL:+${JOBSFLAGS}} local -a make_args local extra_cflags f cfg_cflags cf local hdr_install_subdir for arg in "$@"; do eval "${arg// /\\ }" done CT_DoStep INFO "Building for multilib ${multi_index}/${multi_count}: '${multi_flags}'" # Simply copy files until uClibc has the ability to build out-of-tree CT_DoLog EXTRA "Copying sources to build dir" CT_DoExecLog ALL cp -aT "${CT_SRC_DIR}/${uclibc_name}-${CT_LIBC_VERSION}/." . multilib_dir="lib/${multi_os_dir}" startfiles_dir="${multi_root}/usr/${multilib_dir}" CT_SanitizeVarDir multilib_dir startfiles_dir # Construct make arguments: # - uClibc uses the CROSS environment variable as a prefix to the compiler # tools to use. Since it requires core pass-1, thusly named compiler is # already available. # - Note about CFLAGS: In uClibc, CFLAGS are generated by Rules.mak, # depending on the configuration of the library. That is, they are tailored # to best fit the target. So it is useless and seems to be a bad thing to # use LIBC_EXTRA_CFLAGS here. # - We do _not_ want to strip anything for now, in case we specifically # asked for a debug toolchain, thus the STRIPTOOL= assignment. make_args=( CROSS_COMPILE="${CT_TARGET}-" \ PREFIX="${multi_root}/" \ MULTILIB_DIR="${multilib_dir}" \ LOCALE_DATA_FILENAME="${uclibc_locale_tarball}.tgz" \ STRIPTOOL=true \ ${CT_LIBC_UCLIBC_VERBOSITY} \ ) # Force the date of the pregen locale data, as the # newer ones that are referenced are not available CT_DoLog EXTRA "Applying configuration" # Use the default config if the user did not provide one. if [ -z "${CT_LIBC_UCLIBC_CONFIG_FILE}" ]; then CT_LIBC_UCLIBC_CONFIG_FILE="${CT_LIB_DIR}/contrib/uClibc-defconfigs/${uclibc_name}.config" fi manage_uClibc_config "${CT_LIBC_UCLIBC_CONFIG_FILE}" .config "${multi_flags}" CT_DoYes | CT_DoExecLog ALL make "${make_args[@]}" oldconfig # Now filter the multilib flags. manage_uClibc_config did the opposite of # what Rules.mak in uClibc would do: by the multilib's CFLAGS, it determined # the applicable configuration options. We don't want to pass the same options # in the UCLIBC_EXTRA_CFLAGS again (on some targets, the options do not correctly # override each other). On the other hand, we do not want to lose the options # that are not reflected in the .config. extra_cflags="-pipe" { echo "include Rules.mak"; echo "show-cpu-flags:"; printf '\t@echo $(CPU_CFLAGS)\n'; } \ > .show-cpu-cflags.mk cfg_cflags=$( make "${make_args[@]}" \ --no-print-directory -f .show-cpu-cflags.mk show-cpu-flags ) CT_DoExecLog ALL rm -f .show-cpu-cflags.mk CT_DoLog DEBUG "CPU_CFLAGS detected by uClibc: ${cfg_cflags[@]}" for f in ${multi_flags}; do for cf in ${cfg_cflags}; do if [ "${f}" = "${cf}" ]; then f= break fi done if [ -n "${f}" ]; then extra_cflags+=" ${f}" fi done CT_DoLog DEBUG "Filtered multilib CFLAGS: ${extra_cflags}" make_args+=( UCLIBC_EXTRA_CFLAGS="${extra_cflags}" ) # uClibc does not have a way to select the installation subdirectory for headers, # it is always $(DEVEL_PREFIX)/include. Also, we're reinstalling the headers # at the final stage (see the note below), we may already have the subdirectory # in /usr/include. CT_DoArchUClibcHeaderDir hdr_install_subdir "${multi_flags}" if [ -n "${hdr_install_subdir}" ]; then CT_DoExecLog ALL cp -a "${multi_root}/usr/include" "${multi_root}/usr/include.saved" fi if [ "${libc_mode}" = "startfiles" ]; then CT_DoLog EXTRA "Building headers" CT_DoExecLog ALL make "${make_args[@]}" headers # Ensure the directory for installing multilib-specific binaries exists. CT_DoExecLog ALL mkdir -p "${startfiles_dir}" CT_DoLog EXTRA "Installing headers" CT_DoExecLog ALL make "${make_args[@]}" install_headers # The check might look bogus, but it is the same condition as is used # by GCC build script to enable/disable shared library support. if [ "${CT_THREADS}" = "nptl" ]; then CT_DoLog EXTRA "Building start files" CT_DoExecLog ALL make ${jflag} "${make_args[@]}" \ lib/crt1.o lib/crti.o lib/crtn.o # From: http://git.openembedded.org/cgit.cgi/openembedded/commit/?id=ad5668a7ac7e0436db92e55caaf3fdf782b6ba3b # libm.so is needed for ppc, as libgcc is linked against libm.so # No problem to create it for other archs. CT_DoLog EXTRA "Building dummy shared libs" CT_DoExecLog ALL "${CT_TARGET}-${CT_CC}" -nostdlib -nostartfiles \ -shared ${multi_flags} -x c /dev/null -o libdummy.so CT_DoLog EXTRA "Installing start files" CT_DoExecLog ALL install -m 0644 lib/crt1.o lib/crti.o lib/crtn.o \ "${startfiles_dir}" CT_DoLog EXTRA "Installing dummy shared libs" CT_DoExecLog ALL install -m 0755 libdummy.so "${startfiles_dir}/libc.so" CT_DoExecLog ALL install -m 0755 libdummy.so "${startfiles_dir}/libm.so" fi # CT_THREADS == nptl fi # libc_mode == startfiles if [ "${libc_mode}" = "final" ]; then CT_DoLog EXTRA "Cleaning up startfiles" CT_DoExecLog ALL rm -f "${startfiles_dir}/crt1.o" \ "${startfiles_dir}/crti.o" \ "${startfiles_dir}/crtn.o" \ "${startfiles_dir}/libc.so" \ "${startfiles_dir}/libm.so" CT_DoLog EXTRA "Building C library" CT_DoExecLog ALL make "${make_args[@]}" pregen CT_DoExecLog ALL make ${jflag} "${make_args[@]}" all # YEM-FIXME: # - we want to install 'runtime' files, eg. lib*.{a,so*}, crti.o and # such files, except the headers as they already are installed # - "make install_dev" installs the headers, the crti.o... and the # static libs, but not the dynamic libs # - "make install_runtime" installs the dynamic libs only # - "make install" calls install_runtime and install_dev # - so we're left with re-installing the headers... Sigh... CT_DoLog EXTRA "Installing C library" CT_DoExecLog ALL make "${make_args[@]}" install install_utils fi # libc_mode == final # Now, if installing headers into a subdirectory, put everything in its place. # Remove the header subdirectory if it existed already. if [ -n "${hdr_install_subdir}" ]; then CT_DoExecLog ALL mv "${multi_root}/usr/include" "${multi_root}/usr/include.new" CT_DoExecLog ALL mv "${multi_root}/usr/include.saved" "${multi_root}/usr/include" CT_DoExecLog ALL rm -rf "${multi_root}/usr/include/${hdr_install_subdir}" CT_DoExecLog ALL mv "${multi_root}/usr/include.new" "${multi_root}/usr/include/${hdr_install_subdir}" fi CT_EndStep } # Initialises the .config file to sensible values # $1: original file # $2: modified file manage_uClibc_config() { src="$1" dst="$2" flags="$3" # Start with fresh files CT_DoExecLog ALL cp "${src}" "${dst}" case "${CT_ARCH_ENDIAN}" in big) CT_KconfigDisableOption "ARCH_LITTLE_ENDIAN" "${dst}" CT_KconfigDisableOption "ARCH_WANTS_LITTLE_ENDIAN" "${dst}" CT_KconfigEnableOption "ARCH_BIG_ENDIAN" "${dst}" CT_KconfigEnableOption "ARCH_WANTS_BIG_ENDIAN" "${dst}" ;; little) CT_KconfigDisableOption "ARCH_BIG_ENDIAN" "${dst}" CT_KconfigDisableOption "ARCH_WANTS_BIG_ENDIAN" "${dst}" CT_KconfigEnableOption "ARCH_LITTLE_ENDIAN" "${dst}" CT_KconfigEnableOption "ARCH_WANTS_LITTLE_ENDIAN" "${dst}" ;; esac if [ "${CT_ARCH_USE_MMU}" = "y" ]; then CT_KconfigEnableOption "ARCH_USE_MMU" "${dst}" else CT_KconfigDisableOption "ARCH_USE_MMU" "${dst}" fi if [ "${CT_SHARED_LIBS}" = "y" ]; then CT_KconfigEnableOption "HAVE_SHARED" "${dst}" else CT_KconfigDisableOption "HAVE_SHARED" "${dst}" fi # Accomodate for old and new uClibc version, where the # way to select between hard/soft float has changed case "${CT_ARCH_FLOAT}" in hard|softfp) CT_KconfigEnableOption "UCLIBC_HAS_FPU" "${dst}" CT_KconfigEnableOption "UCLIBC_HAS_FLOATS" "${dst}" ;; soft) CT_KconfigDisableOption "UCLIBC_HAS_FPU" "${dst}" CT_KconfigEnableOption "UCLIBC_HAS_FLOATS" "${dst}" CT_KconfigEnableOption "DO_C99_MATH" "${dst}" ;; esac if [ "${CT_LIBC_UCLIBC_FENV}" = "y" ]; then CT_KconfigEnableOption "UCLIBC_HAS_FENV" "${dst}" fi # We always want ctor/dtor CT_KconfigEnableOption "UCLIBC_CTOR_DTOR" "${dst}" # Change paths to work with crosstool-NG # # DEVEL_PREFIX is left as '/usr/' because it is post-pended to $PREFIX, # which is the correct value of ${PREFIX}/${TARGET}. CT_KconfigSetOption "DEVEL_PREFIX" "\"/usr/\"" "${dst}" CT_KconfigSetOption "RUNTIME_PREFIX" "\"/\"" "${dst}" CT_KconfigSetOption "KERNEL_HEADERS" "\"${CT_HEADERS_DIR}\"" "${dst}" # Locales support # Note that the two PREGEN_LOCALE and the XLOCALE lines may be missing # entirely if LOCALE is not set. If LOCALE was already set, we'll # assume the user has already made all the appropriate generation # arrangements. Note that having the uClibc Makefile download the # pregenerated locales is not compatible with crosstool; besides, # crosstool downloads them as part of getandpatch.sh. CT_KconfigDeleteOption "UCLIBC_DOWNLOAD_PREGENERATED_LOCALE" "${dst}" case "${CT_LIBC_UCLIBC_LOCALES}:${CT_LIBC_UCLIBC_LOCALES_PREGEN_DATA}" in :*) ;; y:) CT_KconfigEnableOption "UCLIBC_HAS_LOCALE" "${dst}" CT_KconfigDeleteOption "UCLIBC_PREGENERATED_LOCALE_DATA" "${dst}" CT_KconfigDeleteOption "UCLIBC_DOWNLOAD_PREGENERATED_LOCALE_DATA" \ "${dst}" CT_KconfigDeleteOption "UCLIBC_HAS_XLOCALE" "${dst}" ;; y:y) CT_KconfigEnableOption "UCLIBC_HAS_LOCALE" "${dst}" CT_KconfigEnableOption "UCLIBC_PREGENERATED_LOCALE_DATA" "${dst}" CT_KconfigDeleteOption "UCLIBC_DOWNLOAD_PREGENERATED_LOCALE_DATA" \ "${dst}" CT_KconfigDeleteOption "UCLIBC_HAS_XLOCALE" "${dst}" ;; esac # WCHAR support if [ "${CT_LIBC_UCLIBC_WCHAR}" = "y" ]; then CT_KconfigEnableOption "UCLIBC_HAS_WCHAR" "${dst}" else CT_KconfigDisableOption "UCLIBC_HAS_WCHAR" "${dst}" fi # IPv6 support if [ "${CT_LIBC_UCLIBC_IPV6}" = "y" ]; then CT_KconfigEnableOption "UCLIBC_HAS_IPV6" "${dst}" else CT_KconfigDisableOption "UCLIBC_HAS_IPV6" "${dst}" fi # Force on options needed for C++ if we'll be making a C++ compiler. # I'm not sure locales are a requirement for doing C++... Are they? if [ "${CT_CC_LANG_CXX}" = "y" ]; then CT_KconfigEnableOption "DO_C99_MATH" "${dst}" CT_KconfigEnableOption "UCLIBC_HAS_GNU_GETOPT" "${dst}" fi # Stack Smash Protection (SSP) if [ "${CT_CC_GCC_LIBSSP}" = "y" ]; then CT_KconfigEnableOption "UCLIBC_HAS_SSP" "${dst}" CT_KconfigEnableOption "UCLIBC_BUILD_SSP" "${dst}" else CT_KconfigDisableOption "UCLIBC_HAS_SSP" "${dst}" CT_KconfigDisableOption "UCLIBC_BUILD_SSP" "${dst}" fi # Push the threading model CT_KconfigDisableOption "UCLIBC_HAS_THREADS" "${dst}" CT_KconfigDisableOption "LINUXTHREADS_OLD" "${dst}" CT_KconfigDisableOption "LINUXTHREADS_NEW" "${dst}" CT_KconfigDisableOption "UCLIBC_HAS_THREADS_NATIVE" "${dst}" case "${CT_THREADS}:${CT_LIBC_UCLIBC_LNXTHRD}" in none:) ;; linuxthreads:) # Newer version of uClibc-ng, no old/new dichotomy CT_KconfigEnableOption "UCLIBC_HAS_THREADS" "${dst}" CT_KconfigEnableOption "UCLIBC_HAS_LINUXTHREADS" "${dst}" ;; linuxthreads:old) CT_KconfigEnableOption "UCLIBC_HAS_THREADS" "${dst}" CT_KconfigEnableOption "LINUXTHREADS_OLD" "${dst}" ;; linuxthreads:new) CT_KconfigEnableOption "UCLIBC_HAS_THREADS" "${dst}" CT_KconfigEnableOption "LINUXTHREADS_NEW" "${dst}" ;; nptl:) CT_KconfigEnableOption "UCLIBC_HAS_THREADS" "${dst}" CT_KconfigEnableOption "UCLIBC_HAS_THREADS_NATIVE" "${dst}" ;; *) CT_Abort "Incorrect thread settings: CT_THREADS='${CT_THREAD}' CT_LIBC_UCLIBC_LNXTHRD='${CT_LIBC_UCLIBC_LNXTHRD}'" ;; esac # Always build the libpthread_db CT_KconfigEnableOption "PTHREADS_DEBUG_SUPPORT" "${dst}" # Force on debug options if asked for CT_KconfigDisableOption "DODEBUG" "${dst}" CT_KconfigDisableOption "DODEBUG_PT" "${dst}" CT_KconfigDisableOption "DOASSERTS" "${dst}" CT_KconfigDisableOption "SUPPORT_LD_DEBUG" "${dst}" CT_KconfigDisableOption "SUPPORT_LD_DEBUG_EARLY" "${dst}" CT_KconfigDisableOption "UCLIBC_MALLOC_DEBUGGING" "${dst}" case "${CT_LIBC_UCLIBC_DEBUG_LEVEL}" in 0) ;; 1) CT_KconfigEnableOption "DODEBUG" "${dst}" ;; 2) CT_KconfigEnableOption "DODEBUG" "${dst}" CT_KconfigEnableOption "DOASSERTS" "${dst}" CT_KconfigEnableOption "SUPPORT_LD_DEBUG" "${dst}" CT_KconfigEnableOption "UCLIBC_MALLOC_DEBUGGING" "${dst}" ;; 3) CT_KconfigEnableOption "DODEBUG" "${dst}" CT_KconfigEnableOption "DODEBUG_PT" "${dst}" CT_KconfigEnableOption "DOASSERTS" "${dst}" CT_KconfigEnableOption "SUPPORT_LD_DEBUG" "${dst}" CT_KconfigEnableOption "SUPPORT_LD_DEBUG_EARLY" "${dst}" CT_KconfigEnableOption "UCLIBC_MALLOC_DEBUGGING" "${dst}" ;; esac # Remove stripping: its the responsibility of the # firmware builder to strip or not. CT_KconfigDisableOption "DOSTRIP" "${dst}" # Now allow architecture to tweak as it wants CT_DoArchUClibcConfig "${dst}" CT_DoArchUClibcCflags "${dst}" "${flags}" } do_libc_post_cc() { # uClibc and GCC disagree where the dynamic linker lives. uClibc always # places it in the MULTILIB_DIR, while gcc does that for *some* variants # and expects it in /lib for the other. So, create a symlink from lib # to the actual location, but only if that will not override the actual # file in /lib. Thus, need to do this after all the variants are built. # Moreover, need to do this after the final compiler is built: on targets # that use elf2flt, the core compilers cannot find ld when running elf2flt. CT_DoStep INFO "Checking dynamic linker symlinks" CT_mkdir_pushd "${CT_BUILD_DIR}/build-libc-post_cc" echo "int main(void) { return 0; }" > test-ldso.c CT_IterateMultilibs do_libc_ldso_fixup ldso_fixup CT_Popd CT_EndStep } do_libc_ldso_fixup() { local multi_dir multi_os_dir multi_root multi_flags multi_index multi_count local binary local ldso ldso_f ldso_d multilib_dir for arg in "$@"; do eval "${arg// /\\ }" done CT_DoLog EXTRA "Checking dynamic linker for multilib '${multi_flags}'" multilib_dir="/lib/${multi_os_dir}" CT_SanitizeVarDir multilib_dir CT_DoExecLog ALL "${CT_TARGET}-${CT_CC}" -o test-ldso ../test-ldso.c ${multi_flags} if [ -r "test-ldso.gdb" ]; then binary="test-ldso.gdb" else binary="test-ldso" fi if ${CT_TARGET}-readelf -Wl "${binary}" | grep -q 'Requesting program interpreter: '; then ldso=$( ${CT_TARGET}-readelf -Wl "${binary}" | \ grep 'Requesting program interpreter: ' | \ sed -e 's,.*: ,,' -e 's,\].*,,' ) fi CT_DoLog DEBUG "Detected dynamic linker for multilib '${multi_flags}': '${ldso}'" ldso_d="${ldso%/ld*.so.*}" ldso_f="${ldso##*/}" # Create symlink if GCC produced an executable, dynamically linked, it was requesting # a linker not in the current directory, and there is no such file in the expected # ldso dir. if [ -n "${ldso}" -a "${ldso_d}" != "${multilib_dir}" -a ! -r "${multi_root}${ldso}" ]; then # Convert ldso_d to "how many levels we need to go up" and remove # leading slash. ldso_d=$( echo "${ldso_d#/}" | sed 's,[^/]\+,..,g' ) CT_DoExecLog ALL ln -sf "${ldso_d}${multilib_dir}/${ldso_f}" \ "${multi_root}${ldso}" fi }