meson: add a recipe and class from meta-oe

The original recipe has been provided and improved by:

Ross Burton <ross.burton@intel.com>
Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Adam C. Foltzer <acfoltzer@galois.com>
Peter Kjellerstedt <peter.kjellerstedt@axis.com>
Linus Svensson <linussn@axis.com>

I have added  patches to fix up gtk-doc and
gobject-introspection in cross-compilation environments,
and also change the order of linker arguments to replicate
autotools more closely (and fix linking errors in some corner
cases).

Signed-off-by: Alexander Kanavin <alexander.kanavin@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 108 insertions, 0 deletions

diff --git a/meta/classes/meson.bbclass b/meta/classes/meson.bbclass
new file mode 100644
index 0000000000..5953b5d698
--- /dev/null
+++ b/meta/classes/meson.bbclass
@@ -0,0 +1,108 @@
+inherit python3native
+
+DEPENDS_append = " meson-native ninja-native"
+
+# As Meson enforces out-of-tree builds we can just use cleandirs
+B = "${WORKDIR}/build"
+do_configure[cleandirs] = "${B}"
+
+# Where the meson.build build configuration is
+MESON_SOURCEPATH = "${S}"
+
+# These variables in the environment override meson's *native* tools settings.
+# We have to unset them, so that meson doesn't pick up the cross tools and
+# use them for native builds.
+unset CC
+unset CXX
+unset AR
+
+def noprefix(var, d):
+    return d.getVar(var).replace(d.getVar('prefix') + '/', '', 1)
+
+MESONOPTS = " --prefix ${prefix} \
+              --bindir ${@noprefix('bindir', d)} \
+              --sbindir ${@noprefix('sbindir', d)} \
+              --datadir ${@noprefix('datadir', d)} \
+              --libdir ${@noprefix('libdir', d)} \
+              --libexecdir ${@noprefix('libexecdir', d)} \
+              --includedir ${@noprefix('includedir', d)} \
+              --mandir ${@noprefix('mandir', d)} \
+              --infodir ${@noprefix('infodir', d)} \
+              --sysconfdir ${sysconfdir} \
+              --localstatedir ${localstatedir} \
+              --sharedstatedir ${sharedstatedir}"
+
+MESON_C_ARGS = "${TARGET_CC_ARCH}${TOOLCHAIN_OPTIONS}"
+MESON_LINK_ARGS = "${MESON_C_ARGS} ${LDFLAGS}"
+
+# both are required but not used by meson
+MESON_HOST_ENDIAN = "bogus-endian"
+MESON_TARGET_ENDIAN = "bogus-endian"
+
+EXTRA_OEMESON += "${PACKAGECONFIG_CONFARGS}"
+
+MESON_CROSS_FILE = ""
+MESON_CROSS_FILE_class-target = "--cross-file ${WORKDIR}/meson.cross"
+
+def meson_array(var, d):
+    return "', '".join(d.getVar(var).split()).join(("'", "'"))
+
+addtask write_config before do_configure
+do_write_config[vardeps] += "MESON_C_ARGS TOOLCHAIN_OPTIONS"
+do_write_config() {
+    # This needs to be Py to split the args into single-element lists
+    cat >${WORKDIR}/meson.cross <<EOF
+[binaries]
+c = '${HOST_PREFIX}gcc'
+cpp = '${HOST_PREFIX}g++'
+ar = '${HOST_PREFIX}ar'
+ld = '${HOST_PREFIX}ld'
+strip = '${HOST_PREFIX}strip'
+readelf = '${HOST_PREFIX}readelf'
+pkgconfig = 'pkg-config'
+
+[properties]
+needs_exe_wrapper = true
+c_args = [${@meson_array('MESON_C_ARGS', d)}]
+c_link_args = [${@meson_array('MESON_LINK_ARGS', d)}]
+cpp_args = [${@meson_array('MESON_C_ARGS', d)}]
+cpp_link_args = [${@meson_array('MESON_LINK_ARGS', d)}]
+gtkdoc_exe_wrapper = '${B}/gtkdoc-qemuwrapper'
+
+[host_machine]
+system = '${HOST_OS}'
+cpu_family = '${HOST_ARCH}'
+cpu = '${HOST_ARCH}'
+endian = '${MESON_HOST_ENDIAN}'
+
+[target_machine]
+system = '${TARGET_OS}'
+cpu_family = '${TARGET_ARCH}'
+cpu = '${TARGET_ARCH}'
+endian = '${MESON_TARGET_ENDIAN}'
+EOF
+}
+
+CONFIGURE_FILES = "meson.build"
+
+meson_do_configure() {
+    if ! meson ${MESONOPTS} "${MESON_SOURCEPATH}" "${B}" ${MESON_CROSS_FILE} ${EXTRA_OEMESON}; then
+        cat ${B}/meson-logs/meson-log.txt
+        bbfatal_log meson failed
+    fi
+}
+
+meson_do_configure_prepend_class-native() {
+    export PKG_CONFIG="pkg-config-native"
+}
+
+do_compile[progress] = "outof:^\[(\d+)/(\d+)\]\s+"
+meson_do_compile() {
+    ninja ${PARALLEL_MAKE}
+}
+
+meson_do_install() {
+    DESTDIR='${D}' ninja ${PARALLEL_MAKEINST} install
+}
+
+EXPORT_FUNCTIONS do_configure do_compile do_install