# See meta-skeleton for a working example.
-# Toolchain should be baremetal or newlib based.
-# TCLIBC="baremetal" or TCLIBC="newlib"
+# Toolchain should be baremetal or newlib/picolibc based.
+# TCLIBC="baremetal" or TCLIBC="newlib" or TCLIBC="picolibc"
COMPATIBLE_HOST:libc-musl:class-target = "null"
COMPATIBLE_HOST:libc-glibc:class-target = "null"
if d.getVar("MODIFYTOS") != "1":
return
- if d.getVar("TCLIBC") in [ 'baremetal', 'newlib' ]:
+ if d.getVar("TCLIBC") in [ 'baremetal', 'newlib', 'picolibc' ]:
return
tos = d.getVar("TARGET_OS")
RECIPE_MAINTAINER:pn-perf = "Bruce Ashfield <bruce.ashfield@gmail.com>"
RECIPE_MAINTAINER:pn-perl = "Alexander Kanavin <alex.kanavin@gmail.com>"
RECIPE_MAINTAINER:pn-perlcross = "Alexander Kanavin <alex.kanavin@gmail.com>"
+RECIPE_MAINTAINER:pn-picolibc = "Alejandro Hernandez <alejandro@enedino.org>"
+RECIPE_MAINTAINER:pn-picolibc-helloworld = "Alejandro Hernandez <alejandro@enedino.org>"
RECIPE_MAINTAINER:pn-piglit = "Ross Burton <ross.burton@arm.com>"
RECIPE_MAINTAINER:pn-pigz = "Hongxu Jia <hongxu.jia@windriver.com>"
RECIPE_MAINTAINER:pn-pinentry = "Unassigned <unassigned@yoctoproject.org>"
--- /dev/null
+#
+# Picolibc configuration
+#
+
+LIBCEXTENSION = "-picolibc"
+LIBCOVERRIDE = ":libc-picolibc"
+
+PREFERRED_PROVIDER_virtual/libc ?= "picolibc"
+PREFERRED_PROVIDER_virtual/libiconv ?= "picolibc"
+PREFERRED_PROVIDER_virtual/libintl ?= "picolibc"
+PREFERRED_PROVIDER_virtual/nativesdk-libintl ?= "nativesdk-glibc"
+PREFERRED_PROVIDER_virtual/nativesdk-libiconv ?= "nativesdk-glibc"
+
+DISTRO_FEATURES_BACKFILL_CONSIDERED += "ldconfig"
+
+IMAGE_LINGUAS = ""
+
+LIBC_DEPENDENCIES = " \
+ picolibc-dbg \
+ picolibc-dev \
+ libgcc-dev \
+ libgcc-dbg \
+ libstdc++-dev \
+ libstdc++-staticdev \
+"
+
+ASSUME_PROVIDED += "virtual/crypt"
+
+TARGET_OS = "elf"
+TARGET_OS:arm = "eabi"
+
+TOOLCHAIN_HOST_TASK ?= "packagegroup-cross-canadian-${MACHINE} nativesdk-qemu nativesdk-sdk-provides-dummy"
+TOOLCHAIN_TARGET_TASK ?= "${LIBC_DEPENDENCIES}"
+TOOLCHAIN_NEED_CONFIGSITE_CACHE:remove = "zlib ncurses"
+
+# RISCV linker doesnt support PIE
+SECURITY_CFLAGS:libc-picolibc:qemuriscv32 = "${SECURITY_NOPIE_CFLAGS}"
+SECURITY_CFLAGS:libc-picolibc:qemuriscv64 = "${SECURITY_NOPIE_CFLAGS}"
+
+
TARGET_OS[doc] = "Specifies the target's operating system."
TARGET_PREFIX[doc] = "The prefix for the cross-compile toolchain (e.g. arm-linux-)."
TARGET_SYS[doc] = "The target system is comprised of TARGET_ARCH,TARGET_VENDOR and TARGET_OS."
-TCLIBC[doc] = "Specifies C library (libc) variant to use during the build process. You can select 'baremetal', 'glibc', 'musl' or 'newlib'."
+TCLIBC[doc] = "Specifies C library (libc) variant to use during the build process. You can select 'baremetal', 'glibc', 'musl', 'newlib', or 'picolibc'."
TCMODE[doc] = "Enables an external toolchain (where provided by an additional layer) if set to a value other than 'default'."
TESTIMAGE_AUTO[doc] = "Enables test booting of virtual machine images under the QEMU emulator after any root filesystems are created and runs tests against those images each time an image is built."
TEST_QEMUBOOT_TIMEOUT[doc] = "The time in seconds allowed for an image to boot before automated runtime tests begin to run against an image."
# Fix: ld: unrecognized option '--hash-style=sysv'
LINKER_HASH_STYLE:libc-newlib = ""
+LINKER_HASH_STYLE:libc-picolibc = ""
# Fix: ld: unrecognized option '--hash-style=gnu'
LINKER_HASH_STYLE:libc-baremetal = ""
return False
def is_maintainer_exception(entry):
- exceptions = ["musl", "newlib", "linux-yocto", "linux-dummy", "mesa-gl", "libgfortran", "libx11-compose-data",
+ exceptions = ["musl", "newlib", "picolibc", "linux-yocto", "linux-dummy", "mesa-gl", "libgfortran", "libx11-compose-data",
"cve-update-nvd2-native",]
for i in exceptions:
if i in entry:
--- /dev/null
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: MIT
+#
+
+from oeqa.selftest.case import OESelftestTestCase
+from oeqa.utils.commands import bitbake, get_bb_var
+
+class PicolibcTest(OESelftestTestCase):
+
+ def test_picolibc(self):
+ compatible_machines = ['qemuarm', 'qemuarm64', 'qemuriscv32', 'qemuriscv64']
+ machine = get_bb_var('MACHINE')
+ if machine not in compatible_machines:
+ self.skipTest('This test only works with machines : %s' % ' '.join(compatible_machines))
+ self.write_config('TCLIBC = "picolibc"')
+ bitbake("picolibc-helloworld")
--- /dev/null
+require picolibc.inc
+
+# baremetal-image overrides
+BAREMETAL_BINNAME ?= "hello_picolibc_${MACHINE}"
+IMAGE_LINK_NAME ?= "baremetal-picolibc-image-${MACHINE}"
+IMAGE_NAME_SUFFIX ?= ""
+QB_DEFAULT_KERNEL ?= "${IMAGE_LINK_NAME}.elf"
+
+inherit baremetal-image
+
+COMPATIBLE_MACHINE = "qemuarm|qemuarm64|qemuriscv32|qemuriscv64"
+
+# Use semihosting to test via QEMU
+QB_OPT_APPEND:append = " -semihosting-config enable=on"
+
+# picolibc comes with a set of linker scripts, set the file
+# according to the architecture being built.
+PICOLIBC_LINKERSCRIPT:qemuarm64 = "aarch64.ld"
+PICOLIBC_LINKERSCRIPT:qemuarm = "arm.ld"
+PICOLIBC_LINKERSCRIPT:qemuriscv32 = "riscv.ld"
+PICOLIBC_LINKERSCRIPT:qemuriscv64 = "riscv.ld"
+
+# Simple compile function that manually exemplifies usage; as noted,
+# use a custom linker script, the GCC specs provided by picolibc
+# and semihost to be able to test via QEMU's monitor
+do_compile(){
+ ${CC} ${CFLAGS} ${LDFLAGS} --verbose -T${S}/hello-world/${PICOLIBC_LINKERSCRIPT} -specs=picolibc.specs --oslib=semihost -o ${BAREMETAL_BINNAME}.elf ${S}/hello-world/hello-world.c
+ ${OBJCOPY} -O binary ${BAREMETAL_BINNAME}.elf ${BAREMETAL_BINNAME}.bin
+}
+
+do_install(){
+ install -d ${D}/${base_libdir}/firmware
+ install -m 755 ${B}/${BAREMETAL_BINNAME}.elf ${D}/${base_libdir}/firmware/${BAREMETAL_BINNAME}.elf
+ install -m 755 ${B}/${BAREMETAL_BINNAME}.bin ${D}/${base_libdir}/firmware/${BAREMETAL_BINNAME}.bin
+}
+
+FILES:${PN} += " \
+ ${base_libdir}/firmware/${BAREMETAL_BINNAME}.elf \
+ ${base_libdir}/firmware/${BAREMETAL_BINNAME}.bin \
+"
--- /dev/null
+SUMMARY = "C Libraries for Smaller Embedded Systems"
+HOMEPAGE = "https://keithp.com/picolibc"
+DESCRIPTION = "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."
+SECTION = "libs"
+
+# Newlib based code but GPL related bits removed, test/printf-tests.c and test/testcases.c
+# are GPLv2 and GeneratePicolibcCrossFile.sh is AGPL3 but not part of the artifacts.
+LICENSE = "BSD-2-Clause & BSD-3-Clause"
+LIC_FILES_CHKSUM = " \
+ file://COPYING.GPL2;md5=59530bdf33659b29e73d4adb9f9f6552 \
+ file://COPYING.NEWLIB;md5=08ae03456feb75b81cfdb359e0f1ef85 \
+ file://COPYING.picolibc;md5=e50fa9458a40929689861ed472d46bc7 \
+ "
+
+BASEVER = "1.8.6"
+PV = "${BASEVER}+git"
+SRC_URI = "git://github.com/picolibc/picolibc.git;protocol=https;branch=main"
+SRCREV="764ef4e401a8f4c6a86ab723533841f072885a5b"
+
+S = "${WORKDIR}/git"
+B = "${WORKDIR}/build"
--- /dev/null
+Upstream-Status: Pending
+
+Picolibc uses its own specs file: picolibc.specs to facilitate compilation, this
+needs to be passed down to GCC via the -specs argument.
+
+Using this specs file overrides some of the default options our toolchain was
+built with, in this case, they modify the include_dir and lib_dir paths used for
+compilation, their intention was to add support for -picolibc-prefix and
+-picolibc-buildtype arguments via the C preprocessor.
+
+-isystem %{-picolibc-prefix=*:%*/include/; -picolibc-buildtype=*:/usr/include/%*; :/usr/include} %(picolibc_cpp)
+
+This had the unwanted effect of defaulting to /usr/include for include_dir if
+those arguments are not being passed, this works fine for their flow but for us
+it pollutes the include directories with paths from the host. The same effect is
+applicable for lib_dir and for the c runtime file.
+
+Our toolchain relies on --sysroot to avoid using any paths from the host, here we
+manually add support for a third possible argument: -sysroot , if this is passed
+then the paths used by the compiler will be relative to the path passed by the
+--sysroot= cmdline argument, setting back the behavior that we intended in the
+first place.
+
+
+Signed-off-by: Alejandro Enedino Hernandez Samaniego <alejandro@enedino.org>
+
+Index: git/meson.build
+===================================================================
+--- git.orig/meson.build
++++ git/meson.build
+@@ -622,12 +622,13 @@ else
+ #
+ picolibc_prefix_format = '-picolibc-prefix=*:@0@'
+ picolibc_buildtype_format = '-picolibc-buildtype=*:@0@'
++sysroot_format = '-sysroot=*:@0@'
+ gen_format = '@0@'
+
+ #
+ # How to glue the three options together
+ #
+-specs_option_format = '%{@0@; @1@; :@2@}'
++specs_option_format = '%{@0@; @1@; @2@; :@3@}'
+
+ #
+ # Build the -isystem value
+@@ -639,10 +640,13 @@ isystem_prefix = picolibc_prefix_format.
+ buildtype_include_dir = specs_prefix_format.format(get_option('includedir') / '%*')
+ isystem_buildtype = picolibc_buildtype_format.format(buildtype_include_dir)
+
++sysroot_include_dir = '%*'
++isystem_sysroot = sysroot_format.format(sysroot_include_dir)
++
+ gen_include_dir = specs_prefix_format.format(get_option('includedir'))
+ isystem_gen = gen_format.format(gen_include_dir)
+
+-specs_isystem = '-isystem ' + specs_option_format.format(isystem_prefix, isystem_buildtype, isystem_gen)
++specs_isystem = '-isystem ' + specs_option_format.format(isystem_prefix, isystem_buildtype, isystem_sysroot, isystem_gen)
+
+ #
+ # Build the non-multilib -L value
+@@ -654,10 +658,13 @@ lib_prefix = picolibc_prefix_format.form
+ buildtype_lib_dir = specs_prefix_format.format(get_option('libdir') / '%*')
+ lib_buildtype = picolibc_buildtype_format.format(buildtype_lib_dir)
+
++sysroot_lib_dir = '%*'
++lib_sysroot = sysroot_format.format(sysroot_lib_dir)
++
+ gen_lib_dir = specs_prefix_format.format(get_option('libdir'))
+ lib_gen = gen_format.format(gen_lib_dir)
+
+-specs_libpath = '-L' + specs_option_format.format(lib_prefix, lib_buildtype, lib_gen)
++specs_libpath = '-L' + specs_option_format.format(lib_prefix, lib_buildtype, lib_sysroot, lib_gen)
+
+ #
+ # Build the non-multilib *startfile options
+@@ -669,6 +676,9 @@ crt0_prefix = picolibc_prefix_format.for
+ buildtype_crt0_path = specs_prefix_format.format(get_option('libdir') / '%*' / crt0_expr)
+ crt0_buildtype = picolibc_buildtype_format.format(buildtype_crt0_path)
+
++sysroot_crt0_path = '%*' + '/' + get_option('libdir') + '/' + '%*' + '/' + crt0_expr
++crt0_sysroot = picolibc_buildtype_format.format(sysroot_crt0_path)
++
+ gen_crt0_path = specs_prefix_format.format(get_option('libdir') / crt0_expr)
+ crt0_gen = gen_format.format(gen_crt0_path)
+
+@@ -686,10 +696,13 @@ if enable_multilib
+ buildtype_multilib_dir = specs_prefix_format.format(get_option('libdir') / '%*/%M')
+ multilib_buildtype = picolibc_buildtype_format.format(buildtype_multilib_dir)
+
++ sysroot_multilib_dir = '%*' + '/' + get_option('libdir') + '/' + '%*/%M'
++ multilib_sysroot = sysroot_format.format(sysroot_multilib_dir)
++
+ gen_multilib_dir = specs_prefix_format.format(get_option('libdir') / '%M')
+ multilib_gen = gen_format.format(gen_multilib_dir)
+
+- specs_multilibpath = '-L' + specs_option_format.format(multilib_prefix, multilib_buildtype, multilib_gen)
++ specs_multilibpath = '-L' + specs_option_format.format(multilib_prefix, multilib_buildtype, multilib_sysroot, multilib_gen)
+
+ #
+ # Prepend the multilib -L option to the non-multilib option
+@@ -705,6 +718,9 @@ if enable_multilib
+ buildtype_multilib_crt0_path = specs_prefix_format.format(get_option('libdir') / '%*/%M' / crt0_expr)
+ crt0_buildtype = picolibc_buildtype_format.format(buildtype_multilib_crt0_path)
+
++ sysroot_multilib_crt0_path = '%*' + prefix + '/' + get_option('libdir') + '/' + '/%M' + '/' + crt0_expr
++ crt0_sysroot = sysroot_format.format(sysroot_multilib_crt0_path)
++
+ gen_multilib_crt0_path = specs_prefix_format.format(get_option('libdir') / '%M' / crt0_expr)
+ crt0_gen = gen_format.format(gen_multilib_crt0_path)
+ endif
+@@ -714,7 +730,7 @@ endif
+ # above. As there's only one value, it's either the
+ # multilib path or the non-multilib path
+ #
+-specs_startfile = specs_option_format.format(crt0_prefix, crt0_buildtype, crt0_gen)
++specs_startfile = specs_option_format.format(crt0_prefix, crt0_buildtype, crt0_sysroot, crt0_gen)
+ endif
+
+ specs_data = configuration_data()
--- /dev/null
+# We need to explicitly bypass mesons sanity check to avoid early compiler errors
+# otherwise meson will try to compile AND run test applications:
+# ../git/meson.build:35:0: ERROR: Executables created by c compiler are not runnable...
+
+[properties]
+skip_sanity_check=true
\ No newline at end of file
--- /dev/null
+require picolibc.inc
+
+INHIBIT_DEFAULT_DEPS = "1"
+DEPENDS = "virtual/${TARGET_PREFIX}gcc"
+
+PROVIDES += "virtual/libc virtual/libiconv virtual/libintl"
+
+COMPATIBLE_HOST:libc-musl:class-target = "null"
+COMPATIBLE_HOST:libc-glibc:class-target = "null"
+COMPATIBLE_MACHINE = "qemuarm|qemuarm64|qemuriscv32|qemuriscv64"
+
+SRC_URI:append = " file://avoid_polluting_cross_directories.patch"
+SRC_URI:append = " file://no-early-compiler-checks.cross"
+
+# This is being added by picolibc meson files as well to avoid
+# early compiler tests from failing, cant remember why I added it
+# to the newlib recipe but I would assume it was for the same reason
+TARGET_CC_ARCH:append = " -nostdlib"
+
+# When using RISCV64 use medany for both C library and application recipes
+TARGET_CFLAGS:append:qemuriscv64 = " -mcmodel=medany"
+
+inherit meson
+
+MESON_CROSS_FILE:append = " --cross-file=${UNPACKDIR}/no-early-compiler-checks.cross"
+
+PACKAGECONFIG ??= " specsdir"
+# Install GCC specs on libdir
+PACKAGECONFIG[specsdir] = "-Dspecsdir=${libdir},-Dspecsdir=none"
+
+
+FILES:${PN}-dev:append = " ${libdir}/*.specs ${libdir}/*.ld"
+
+# No rpm package is actually created but -dev depends on it, avoid dnf error
+DEV_PKG_DEPENDENCY:libc-picolibc = ""
EXTRA_OECONF:append:libc-baremetal = " --without-headers"
EXTRA_OECONF:remove:libc-baremetal = "--enable-threads=posix"
EXTRA_OECONF:remove:libc-newlib = "--enable-threads=posix"
+EXTRA_OECONF:remove:libc-picolibc = "--enable-threads=posix"
EXTRA_OECONF_PATHS = "\
--with-gxx-include-dir=/not/exist${target_includedir}/c++/${BINV} \
EXTRA_OECONF:append:linuxstdbase = " --enable-clocale=gnu"
EXTRA_OECONF:append = " --cache-file=${B}/config.cache"
EXTRA_OECONF:append:libc-newlib = " --with-newlib --with-target-subdir"
+EXTRA_OECONF:append:libc-picolibc = " --with-newlib --with-target-subdir"
EXTRA_OECONF:append:libc-baremetal = " --with-target-subdir"
# Disable ifuncs for libatomic on arm conflicts -march/-mcpu
# Newlib does not support symbol versioning on libsdtcc++
SYMVERS_CONF:libc-newlib = ""
+SYMVERS_CONF:libc-picolibc = ""
# Building with thumb enabled on armv6t fails
ARM_INSTRUCTION_SET:armv6 = "arm"
"
# Only build libstdc++ for newlib
RUNTIMETARGET:libc-newlib = "libstdc++-v3"
+RUNTIMETARGET:libc-picolibc = "libstdc++-v3"
# libiberty
# libgfortran needs separate recipe due to libquadmath dependency
rmdir ${D}${base_libdir}
fi
}
+do_install:append:libc-picolibc () {
+ if [ "${base_libdir}" != "${libdir}" ]; then
+ rmdir ${D}${base_libdir}
+ fi
+}
# No rpm package is actually created but -dev depends on it, avoid dnf error
DEV_PKG_DEPENDENCY:libc-baremetal = ""
projects / thirdparty / openembedded / openembedded-core-contrib.git / commitdiff
