diff options
Diffstat (limited to 'scripts/build/libc/uClibc-ng.sh')
| -rw-r--r-- | scripts/build/libc/uClibc-ng.sh | 421 |
1 files changed, 421 insertions, 0 deletions
diff --git a/scripts/build/libc/uClibc-ng.sh b/scripts/build/libc/uClibc-ng.sh new file mode 100644 index 00000000..16ebc2c9 --- /dev/null +++ b/scripts/build/libc/uClibc-ng.sh @@ -0,0 +1,421 @@ +# 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 + +# Build and install headers and start files +uClibc_ng_start_files() +{ + # Start files and Headers should be configured the same way as the + # final libc, but built and installed differently. + uClibc_ng_backend libc_mode=startfiles +} + +# This function builds and install the full C library +uClibc_ng_main() +{ + uClibc_ng_backend libc_mode=final +} + +# Common backend for 1st and 2nd passes. +uClibc_ng_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 uClibc_ng_backend_once multilib libc_mode="${libc_mode}" + CT_Popd + CT_EndStep +} + +# Common backend for 1st and 2nd passes, once per multilib. +uClibc_ng_backend_once() +{ + local libc_mode + local multi_dir multi_os_dir multi_root multi_flags multi_index multi_count + local multilib_dir startfiles_dir + local jflag=${CT_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}: '${multi_flags}'" + + multilib_dir="lib/${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="${CT_TARGET}-" \ + HOSTCC="${CT_BUILD}-gcc" \ + PREFIX="${multi_root}/" \ + MULTILIB_DIR="${multilib_dir}" \ + STRIPTOOL=true \ + ${CT_LIBC_UCLIBC_VERBOSITY} \ + ) + + # Simply copy files until uClibc has the ability to build out-of-tree + CT_DoLog EXTRA "Copying sources to build dir" + CT_DoExecLog ALL cp -av "${CT_SRC_DIR}/uClibc-ng/." . + + # 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}/packages/uClibc-ng/config" + fi + + manage_uClibc_config "${CT_LIBC_UCLIBC_CONFIG_FILE}" .config "${multi_flags}" + CT_DoExecLog ALL make "${make_args[@]}" olddefconfig + + # 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 + + if [ "${CT_SHARED_LIBS}" = "y" ]; then + # From: http://git.openembedded.org/cgit.cgi/openembedded/commit/?id=ad5668a7ac7e0436db92e55caaf3fdf782b6ba3b + # libm.so is needed for ppc, as libgcc is linked against libm.so + # No problem to create it for other archs. + CT_DoLog EXTRA "Building dummy shared libs" + CT_DoExecLog ALL "${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_SHARED_LIBS == y + 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|big,little) + 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|little,big) + 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" "${dst}" + CT_KconfigDisableOption "UCLIBC_FORMAT_FDPIC" "${dst}" + CT_KconfigDisableOption "UCLIBC_FORMAT_FLAT" "${dst}" + CT_KconfigDisableOption "UCLIBC_FORMAT_SHARED_FLAT" "${dst}" + case "${CT_ARCH_BINFMT_FLAT},${CT_ARCH_BINFMT_FDPIC},${CT_SHARED_LIBS}" in + y,,y) CT_KconfigEnableOption "UCLIBC_FORMAT_SHARED_FLAT" "${dst}";; + y,,) CT_KconfigEnableOption "UCLIBC_FORMAT_FLAT" "${dst}";; + ,y,*) CT_KconfigEnableOption "UCLIBC_FORMAT_FDPIC" "${dst}";; + *) CT_Abort "Unsupported binary format";; + esac + 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" "${dst}" + else + CT_KconfigDisableOption "UCLIBC_HAS_FENV" "${dst}" + fi + if [ "${CT_LIBC_UCLIBC_RPC}" = "y" ]; then + CT_KconfigEnableOption "UCLIBC_HAS_RPC" "${dst}" + else + CT_KconfigDisableOption "UCLIBC_HAS_RPC" "${dst}" + fi + + # We always want ctor/dtor + CT_KconfigEnableOption "UCLIBC_CTOR_DTOR" "${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. + if [ -z "${CT_LIBC_UCLIBC_LOCALES}" ]; then + CT_KconfigDisableOption "UCLIBC_HAS_LOCALE" "${dst}" + else + CT_KconfigEnableOption "UCLIBC_HAS_LOCALE" "${dst}" + CT_KconfigDeleteOption "UCLIBC_PREGENERATED_LOCALE_DATA" "${dst}" + CT_KconfigDeleteOption "UCLIBC_DOWNLOAD_PREGENERATED_LOCALE_DATA" "${dst}" + fi + + # WCHAR support + if [ "${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" "${dst}" + fi + + # Iconv support + if [ "${CT_LIBC_UCLIBC_LIBICONV}" = "y" ]; then + CT_KconfigEnableOption "UCLIBC_HAS_LIBICONV" "${dst}" + else + CT_KconfigDisableOption "UCLIBC_HAS_LIBICONV" "${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_LIBC_UCLIBC_HAS_SSP}" = "y" ]; then + CT_KconfigEnableOption "UCLIBC_HAS_SSP" "${dst}" + else + CT_KconfigDisableOption "UCLIBC_HAS_SSP" "${dst}" + fi + if [ "${CT_LIBC_UCLIBC_BUILD_SSP}" = "y" ]; then + CT_KconfigEnableOption "UCLIBC_BUILD_SSP" "${dst}" + else + 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}" in + none) + ;; + linuxthreads) + CT_KconfigEnableOption "UCLIBC_HAS_THREADS" "${dst}" + CT_KconfigEnableOption "UCLIBC_HAS_LINUXTHREADS" "${dst}" + ;; + nptl) + CT_KconfigEnableOption "UCLIBC_HAS_THREADS" "${dst}" + CT_KconfigEnableOption "UCLIBC_HAS_THREADS_NATIVE" "${dst}" + ;; + *) + CT_Abort "Incorrect thread settings: CT_THREADS='${CT_THREADS}'" + ;; + esac + + # Always build the libpthread_db + CT_KconfigEnableOption "PTHREADS_DEBUG_SUPPORT" "${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}" + + # Preserve the config we created (before uclibc's `make olddefconfig` + # overrides anything). + CT_DoExecLog ALL cp "${dst}" "${dst}.created-by-ct-ng" +} + +uClibc_ng_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_MultilibFixupLDSO + + if [ -n "${CT_LIBC_UCLIBC_CONFIG_FILE}" ]; then + CT_InstallConfigurationFile "${CT_LIBC_UCLIBC_CONFIG_FILE}" libc + fi +} |