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Diffstat (limited to 'scripts/build/companion_libs/340-picolibc.sh')
| -rw-r--r-- | scripts/build/companion_libs/340-picolibc.sh | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/scripts/build/companion_libs/340-picolibc.sh b/scripts/build/companion_libs/340-picolibc.sh new file mode 100644 index 0000000..e879005 --- /dev/null +++ b/scripts/build/companion_libs/340-picolibc.sh @@ -0,0 +1,171 @@ +# This file adds functions to build the Picolibc library +# Copyright © 2020 Keith Packard +# Licensed under the GPL v2 or later. See COPYING in the root of this package +# +# Edited by Keith Packard <keithp@keithp.com> +# + +do_picolibc_get() { :; } +do_picolibc_extract() { :; } +do_picolibc_for_build() { :; } +do_picolibc_for_host() { :; } +do_picolibc_for_target() { :; } + +if [ "${CT_COMP_LIBS_PICOLIBC}" = "y" ]; then + +# Download picolibc +do_picolibc_get() { + CT_Fetch PICOLIBC +} + +do_picolibc_extract() { + CT_ExtractPatch PICOLIBC +} + +#------------------------------------------------------------------------------ +# Build an additional target libstdc++ with "-Os" (optimise for speed) option +# flag for libstdc++ "picolibc" variant. +do_cc_libstdcxx_picolibc() +{ + local -a final_opts + local final_backend + + if [ "${CT_LIBC_PICOLIBC_GCC_LIBSTDCXX}" = "y" ]; then + final_opts+=( "host=${CT_HOST}" ) + final_opts+=( "libstdcxx_name=picolibc" ) + final_opts+=( "prefix=${CT_PREFIX_DIR}" ) + final_opts+=( "complibs=${CT_HOST_COMPLIBS_DIR}" ) + final_opts+=( "cflags=${CT_CFLAGS_FOR_HOST}" ) + final_opts+=( "ldflags=${CT_LDFLAGS_FOR_HOST}" ) + final_opts+=( "lang_list=c,c++" ) + final_opts+=( "build_step=libstdcxx" ) + final_opts+=( "extra_config+=('--enable-stdio=stdio_pure')" ) + final_opts+=( "extra_config+=('--disable-wchar_t')" ) + if [ "${CT_LIBC_PICOLIBC_ENABLE_TARGET_OPTSPACE}" = "y" ]; then + final_opts+=( "enable_optspace=yes" ) + fi + + if [ "${CT_BARE_METAL}" = "y" ]; then + final_opts+=( "mode=baremetal" ) + final_opts+=( "build_libgcc=yes" ) + final_opts+=( "build_libstdcxx=yes" ) + final_opts+=( "build_libgfortran=yes" ) + if [ "${CT_STATIC_TOOLCHAIN}" = "y" ]; then + final_opts+=( "build_staticlinked=yes" ) + fi + final_backend=do_gcc_core_backend + else + final_backend=do_gcc_backend + fi + + CT_DoStep INFO "Installing libstdc++ picolibc" + CT_mkdir_pushd "${CT_BUILD_DIR}/build-cc-libstdcxx-picolibc" + "${final_backend}" "${final_opts[@]}" + CT_Popd + + CT_EndStep + fi +} + +do_picolibc_for_target() { + local -a picolibc_opts + local cflags_for_target + + CT_DoStep INFO "Installing Picolibc library" + + CT_mkdir_pushd "${CT_BUILD_DIR}/build-picolibc-build-${CT_BUILD}" + + CT_DoLog EXTRA "Configuring Picolibc library" + + # Multilib is the default, so if it is not enabled, disable it. + if [ "${CT_MULTILIB}" != "y" ]; then + picolibc_opts+=("-Dmultilib=false") + fi + + yn_args="IO_C99FMT:io-c99-formats +IO_LL:io-long-long +REGISTER_FINI:newlib-register-fini +NANO_MALLOC:newlib-nano-malloc +ATEXIT_DYNAMIC_ALLOC:newlib-atexit-dynamic-alloc +GLOBAL_ATEXIT:newlib-global-atexit +LITE_EXIT:lite-exit +MULTITHREAD:newlib-multithread +RETARGETABLE_LOCKING:newlib-retargetable-locking + " + + for ynarg in $yn_args; do + var="CT_LIBC_PICOLIBC_${ynarg%:*}" + eval var=\$${var} + argument=${ynarg#*:} + + + if [ "${var}" = "y" ]; then + picolibc_opts+=( "-D$argument=true" ) + else + picolibc_opts+=( "-D$argument=false" ) + fi + done + + [ "${CT_USE_SYSROOT}" = "y" ] && \ + picolibc_opts+=( "-Dsysroot-install=true" ) + + [ "${CT_LIBC_PICOLIBC_EXTRA_SECTIONS}" = "y" ] && \ + CT_LIBC_PICOLIBC_TARGET_CFLAGS="${CT_LIBC_PICOLIBC_TARGET_CFLAGS} -ffunction-sections -fdata-sections" + + [ "${CT_LIBC_PICOLIBC_LTO}" = "y" ] && \ + CT_LIBC_PICOLIBC_TARGET_CFLAGS="${CT_LIBC_PICOLIBC_TARGET_CFLAGS} -flto" + + cflags_for_target="${CT_ALL_TARGET_CFLAGS} ${CT_LIBC_PICOLIBC_TARGET_CFLAGS}" + + # Note: picolibc handles the build/host/target a little bit differently + # than one would expect: + # build : not used + # host : the machine building picolibc + # target : the machine picolibc runs on + meson_cflags="" + for cflag in ${cflags_for_target}; do + meson_cflags="${meson_cflags} '${cflag}'," + done + cat << EOF > picolibc-cross.txt +[binaries] +c = '${CT_TARGET}-gcc' +ar = '${CT_TARGET}-ar' +as = '${CT_TARGET}-as' +strip = '${CT_TARGET}-strip' + +[host_machine] +system = '${CT_TARGET_VENDOR}' +cpu_family = '${CT_TARGET_ARCH}' +cpu = '${CT_TARGET_ARCH}' +endian = '${CT_ARCH_ENDIAN}' + +[properties] +c_args = [ ${meson_cflags} '-nostdlib', '-fno-common', '-ftls-model=local-exec' ] +needs_exe_wrapper = true +skip_sanity_check = true +EOF + + CT_DoExecLog CFG \ + meson \ + --cross-file picolibc-cross.txt \ + --prefix="${CT_PREFIX_DIR}" \ + -Dincludedir=picolibc/include \ + -Dlibdir=picolibc/${CT_TARGET}/lib \ + -Dspecsdir="${CT_SYSROOT_DIR}"/lib \ + "${CT_SRC_DIR}/picolibc" \ + "${picolibc_opts[@]}" \ + "${CT_LIBC_PICOLIBC_EXTRA_CONFIG_ARRAY[@]}" + + CT_DoLog EXTRA "Building C library" + CT_DoExecLog ALL ninja + + CT_DoLog EXTRA "Installing C library" + CT_DoExecLog ALL ninja install + + CT_Popd + CT_EndStep + + do_cc_libstdcxx_picolibc +} + +fi |