Files
poky/meta/recipes-devtools/gcc/gcc-cross.inc
Alejandro Hernandez Samaniego 09b49a35e1 tclibc-picolibc: Adds a new TCLIBC variant to build with picolibc as C library
Enables usage of TCLIBC=picolibc extending OE functionality to build and use
picolibc based toolchains to build baremetal applications.

Picolibc is a set of standard C libraries, both libc and libm, designed for
smaller embedded systems with limited ROM and RAM. Picolibc includes code
from Newlib and AVR Libc, but adresses some of newlibs concerns, it retains
newlibs directory structure, math, string and locale implementations, but
removed the GPL bits used to build the library, swiches old C style code for
C18 and replaces autotools with meson.

This patch adds a picolibc recipe for the C library, a picolibc-helloworld
recipe that contains an example application and a testcase that builds it.

Picolibc can be built for ARM and RISCV architectures, its been tested both
for 32 and 64 bits, the provided example recipe produces the following output:

hello, world

Runqemu does not automatically show any output since it hides QEMU stderr which
is where the QEMU monitors output is directed to when using semihosting, but,
manually running the same QEMU command does work properly.

(From OE-Core rev: c7535ecaccb72ef21a61f9aec5c68e61fb4f6fb6)

Signed-off-by: Alejandro Enedino Hernandez Samaniego <alejandro@enedino.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2024-07-26 12:28:42 +01:00

166 lines
6.4 KiB
PHP

inherit cross
INHIBIT_DEFAULT_DEPS = "1"
EXTRADEPENDS = ""
DEPENDS = "virtual/${TARGET_PREFIX}binutils ${EXTRADEPENDS} ${NATIVEDEPS}"
PROVIDES = "virtual/${TARGET_PREFIX}gcc virtual/${TARGET_PREFIX}g++"
python () {
if d.getVar("TARGET_OS").startswith("linux"):
d.setVar("EXTRADEPENDS", "linux-libc-headers")
}
PN = "gcc-cross-${TARGET_ARCH}"
# Ignore how TARGET_ARCH is computed.
TARGET_ARCH[vardepvalue] = "${TARGET_ARCH}"
require gcc-configure-common.inc
# While we want the 'gnu' hash style, we explicitly set it to sysv here to
# ensure that any recipe which doesn't obey our LDFLAGS (which also set it to
# gnu) will hit a QA failure.
LINKER_HASH_STYLE ?= "sysv"
EXTRA_OECONF += "--enable-poison-system-directories=error"
EXTRA_OECONF:append:sh4 = " \
--with-multilib-list= \
--enable-incomplete-targets \
"
EXTRA_OECONF += "\
--with-system-zlib \
"
EXTRA_OECONF:append:libc-baremetal = " --without-headers"
EXTRA_OECONF:remove:libc-baremetal = "--enable-threads=posix"
EXTRA_OECONF:remove:libc-newlib = "--enable-threads=posix"
EXTRA_OECONF:remove:libc-picolibc = "--enable-threads=posix"
EXTRA_OECONF_PATHS = "\
--with-gxx-include-dir=/not/exist${target_includedir}/c++/${BINV} \
--with-gxx-libcxx-include-dir=/not/exist${target_includedir}/c++/v1 \
--with-sysroot=/not/exist \
--with-build-sysroot=${STAGING_DIR_TARGET} \
"
ARCH_FLAGS_FOR_TARGET += "-isystem${STAGING_DIR_TARGET}${target_includedir}"
do_configure:prepend () {
install -d ${RECIPE_SYSROOT}${target_includedir}
touch ${RECIPE_SYSROOT}${target_includedir}/limits.h
}
do_compile () {
export CC="${BUILD_CC}"
export AR_FOR_TARGET="${TARGET_SYS}-ar"
export RANLIB_FOR_TARGET="${TARGET_SYS}-ranlib"
export LD_FOR_TARGET="${TARGET_SYS}-ld"
export NM_FOR_TARGET="${TARGET_SYS}-nm"
export CC_FOR_TARGET="${CCACHE} ${TARGET_SYS}-gcc"
export CFLAGS_FOR_TARGET="${TARGET_CFLAGS}"
export CPPFLAGS_FOR_TARGET="${TARGET_CPPFLAGS}"
export CXXFLAGS_FOR_TARGET="${TARGET_CXXFLAGS}"
export LDFLAGS_FOR_TARGET="${TARGET_LDFLAGS}"
# Prevent native/host sysroot path from being used in configargs.h header,
# as it will be rewritten when used by other sysroots preventing support
# for gcc plugins
oe_runmake configure-gcc
sed -i 's@${STAGING_DIR_TARGET}@/host@g' ${B}/gcc/configargs.h
sed -i 's@${STAGING_DIR_HOST}@/host@g' ${B}/gcc/configargs.h
# Prevent sysroot/workdir paths from being used in checksum-options.
# checksum-options is used to generate a checksum which is embedded into
# the output binary.
oe_runmake TARGET-gcc=checksum-options all-gcc
sed -i 's@${DEBUG_PREFIX_MAP}@@g' ${B}/gcc/checksum-options
sed -i 's@${STAGING_DIR_HOST}@/host@g' ${B}/gcc/checksum-options
oe_runmake all-host configure-target-libgcc
(cd ${B}/${TARGET_SYS}/libgcc; oe_runmake enable-execute-stack.c unwind.h md-unwind-support.h sfp-machine.h gthr-default.h)
}
INHIBIT_PACKAGE_STRIP = "1"
# Compute how to get from libexecdir to bindir in python (easier than shell)
BINRELPATH = "${@os.path.relpath(d.expand("${STAGING_DIR_NATIVE}${prefix_native}/bin/${TARGET_SYS}"), d.expand("${libexecdir}/gcc/${TARGET_SYS}/${BINV}"))}"
# linker plugin path
LIBRELPATH = "${@os.path.relpath(d.expand("${libexecdir}/gcc/${TARGET_SYS}/${BINV}"), d.expand("${STAGING_LIBDIR_NATIVE}/${TARGET_SYS}/bfd-plugins"))}"
do_install () {
( cd ${B}/${TARGET_SYS}/libgcc; oe_runmake 'DESTDIR=${D}' install-unwind_h-forbuild install-unwind_h )
oe_runmake 'DESTDIR=${D}' install-host
install -d ${D}${target_base_libdir}
install -d ${D}${target_libdir}
# Link gfortran to g77 to satisfy not-so-smart configure or hard coded g77
# gfortran is fully backwards compatible. This is a safe and practical solution.
if [ -n "${@d.getVar('FORTRAN')}" ]; then
ln -sf ${STAGING_DIR_NATIVE}${prefix_native}/bin/${TARGET_PREFIX}gfortran ${STAGING_DIR_NATIVE}${prefix_native}/bin/${TARGET_PREFIX}g77 || true
fortsymlinks="g77 gfortran"
fi
# Insert symlinks into libexec so when tools without a prefix are searched for, the correct ones are
# found. These need to be relative paths so they work in different locations.
dest=${D}${libexecdir}/gcc/${TARGET_SYS}/${BINV}/
install -d $dest
for t in ar as ld ld.bfd ld.gold nm objcopy objdump ranlib strip gcc cpp $fortsymlinks; do
ln -sf ${BINRELPATH}/${TARGET_PREFIX}$t $dest$t
ln -sf ${BINRELPATH}/${TARGET_PREFIX}$t ${dest}${TARGET_PREFIX}$t
done
# Remove things we don't need but keep share/java
for d in info man share/doc share/locale share/man share/info; do
rm -rf ${D}${STAGING_DIR_NATIVE}${prefix_native}/$d
done
# libquadmath headers need to be available in the gcc libexec dir
install -d ${D}${libdir}/gcc/${TARGET_SYS}/${BINV}/include/
cp ${S}/libquadmath/quadmath.h ${D}${libdir}/gcc/${TARGET_SYS}/${BINV}/include/
cp ${S}/libquadmath/quadmath_weak.h ${D}${libdir}/gcc/${TARGET_SYS}/${BINV}/include/
find ${D}${libdir}/gcc/${TARGET_SYS}/${BINV}/include-fixed -type f -not -name "README" -not -name limits.h -not -name syslimits.h | xargs rm -f
# install LTO linker plugins where binutils tools can find it
install -d ${D}${libdir}/bfd-plugins
ln -sf ${LIBRELPATH}/liblto_plugin.so ${D}${libdir}/bfd-plugins/liblto_plugin.so
}
do_package[noexec] = "1"
do_packagedata[noexec] = "1"
do_package_write_ipk[noexec] = "1"
do_package_write_rpm[noexec] = "1"
do_package_write_deb[noexec] = "1"
inherit chrpath
python gcc_stash_builddir_fixrpaths() {
# rewrite rpaths, breaking hardlinks as required
process_dir("/", d.getVar("BUILDDIRSTASH"), d, break_hardlinks = True)
}
BUILDDIRSTASH = "${WORKDIR}/stashed-builddir/build"
do_gcc_stash_builddir[dirs] = "${B}"
do_gcc_stash_builddir[cleandirs] = "${BUILDDIRSTASH}"
do_gcc_stash_builddir[postfuncs] += "gcc_stash_builddir_fixrpaths"
do_gcc_stash_builddir () {
dest=${BUILDDIRSTASH}
hardlinkdir . $dest
# Makefile does move-if-change which can end up with 'timestamp' as file contents so break links to those files
rm $dest/gcc/include/*.h
cp gcc/include/*.h $dest/gcc/include/
sysroot-relativelinks.py $dest
}
addtask do_gcc_stash_builddir after do_compile before do_install
SSTATETASKS += "do_gcc_stash_builddir"
do_gcc_stash_builddir[sstate-inputdirs] = "${BUILDDIRSTASH}"
do_gcc_stash_builddir[sstate-outputdirs] = "${COMPONENTS_DIR}/${BUILD_ARCH}/gcc-stashed-builddir-${TARGET_SYS}"
do_gcc_stash_builddir[sstate-fixmedir] = "${COMPONENTS_DIR}/${BUILD_ARCH}/gcc-stashed-builddir-${TARGET_SYS}"
python do_gcc_stash_builddir_setscene () {
sstate_setscene(d)
}
addtask do_gcc_stash_builddir_setscene