[2/4] llvm: add recipe for just the LLVM libraries

diff --git a/meta/conf/distro/include/maintainers.inc b/meta/conf/distro/include/maintainers.inc
index 0e5150895f2..d2c613b8e9d 100644
--- a/meta/conf/distro/include/maintainers.inc
+++ b/meta/conf/distro/include/maintainers.inc
@@ -483,6 +483,7 @@  RECIPE_MAINTAINER:pn-lld = "Khem Raj <raj.khem@gmail.com>"
 RECIPE_MAINTAINER:pn-lldb = "Khem Raj <raj.khem@gmail.com>"
 RECIPE_MAINTAINER:pn-llvm-project-source-21.1.2 = "Khem Raj <raj.khem@gmail.com>"
 RECIPE_MAINTAINER:pn-llvm-tblgen-native = "Khem Raj <raj.khem@gmail.com>"
+RECIPE_MAINTAINER:pn-llvm = "Khem Raj <raj.khem@gmail.com>"
 RECIPE_MAINTAINER:pn-logrotate = "Yi Zhao <yi.zhao@windriver.com>"
 RECIPE_MAINTAINER:pn-log4cplus = "Unassigned <unassigned@yoctoproject.org>"
 RECIPE_MAINTAINER:pn-lrzsz = "Unassigned <unassigned@yoctoproject.org>"
diff --git a/meta/recipes-devtools/clang/llvm_git.bb b/meta/recipes-devtools/clang/llvm_git.bb
new file mode 100644
index 00000000000..d2b060ff884
--- /dev/null
+++ b/meta/recipes-devtools/clang/llvm_git.bb
@@ -0,0 +1,129 @@ 
+# Copyright (C) 2017 Khem Raj <raj.khem@gmail.com>
+# Released under the MIT license (see COPYING.MIT for the terms)
+
+SUMMARY = "The LLVM Compiler Infrastructure"
+HOMEPAGE = "http://llvm.org"
+LICENSE = "Apache-2.0-with-LLVM-exception"
+SECTION = "devel"
+
+require common-clang.inc
+require common-source.inc
+
+LIC_FILES_CHKSUM = "file://LICENSE.TXT;md5=8a15a0759ef07f2682d2ba4b893c9afe"
+
+DEPENDS = "llvm-tblgen-native libffi libxml2 zlib zstd"
+
+inherit cmake pkgconfig lib_package
+
+OECMAKE_SOURCEPATH = "${S}/llvm"
+
+# By default we build all the supported CPU architectures, and the GPU targets
+# if the opencl, opengl or vulkan DISTRO_FEATURES are enabled.
+#
+# For target builds we default to building that specific architecture, BPF, and the GPU targets if required.
+#
+# The available target list can be seen in the source code
+# in the LLVM_ALL_TARGETS assignment:
+# https://github.com/llvm/llvm-project/blob/main/llvm/CMakeLists.txt
+LLVM_TARGETS_GPU ?= "${@bb.utils.contains_any('DISTRO_FEATURES', 'opencl opengl vulkan', 'AMDGPU;NVPTX;SPIRV', '', d)}"
+LLVM_TARGETS_TO_BUILD ?= "AArch64;ARM;BPF;Mips;PowerPC;RISCV;X86;LoongArch;${LLVM_TARGETS_GPU}"
+LLVM_TARGETS_TO_BUILD:class-target ?= "${@get_clang_host_arch(bb, d)};BPF;${LLVM_TARGETS_GPU}"
+
+LLVM_EXPERIMENTAL_TARGETS_TO_BUILD ?= ""
+
+HF = ""
+HF:class-target = "${@ bb.utils.contains('TUNE_CCARGS_MFLOAT', 'hard', 'hf', '', d)}"
+HF[vardepvalue] = "${HF}"
+
+EXTRA_OECMAKE += "-DCMAKE_BUILD_TYPE=MinSizeRel \
+                  -DLLVM_ENABLE_BINDINGS=OFF \
+                  -DLLVM_ENABLE_FFI=ON \
+                  -DLLVM_ENABLE_RTTI=ON \
+                  -DLLVM_TARGETS_TO_BUILD='${LLVM_TARGETS_TO_BUILD}' \
+                  -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD='${LLVM_EXPERIMENTAL_TARGETS_TO_BUILD}' \
+                  -DLLVM_LIBDIR_SUFFIX=${LLVM_LIBDIR_SUFFIX} \
+                  -DLLVM_VERSION_SUFFIX='${VER_SUFFIX}' \
+                  -DLLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN=ON \
+                  -DLLVM_INCLUDE_TESTS=OFF \
+                  -DLLVM_INCLUDE_EXAMPLES=OFF \
+                  -DLLVM_TOOL_OBJ2YAML_BUILD=OFF \
+                  -DLLVM_TOOL_YAML2OBJ_BUILD=OFF \
+                  -DLLVM_NATIVE_TOOL_DIR=${STAGING_BINDIR_NATIVE} \
+                  -DLLVM_TABLEGEN=${STAGING_BINDIR_NATIVE}/llvm-tblgen \
+                  -DCROSS_TOOLCHAIN_FLAGS_NATIVE='-DCMAKE_TOOLCHAIN_FILE=${WORKDIR}/toolchain-native.cmake' \
+                 "
+
+EXTRA_OECMAKE:append:class-target = "\
+                  -DLLVM_DEFAULT_TARGET_TRIPLE=${TARGET_SYS}${HF} \
+                  -DLLVM_TARGET_ARCH=${HOST_ARCH} \
+                  -DLLVM_HOST_TRIPLE=${TARGET_SYS}${HF} \
+                  -DLLVM_CONFIG_PATH=${STAGING_BINDIR_NATIVE}/llvm-config \
+                 "
+
+EXTRA_OECMAKE:append:class-nativesdk = "\
+                  -DLLVM_HOST_TRIPLE=${SDK_SYS} \
+                  -DLLVM_CONFIG_PATH=${STAGING_BINDIR_NATIVE}/llvm-config \
+                 "
+
+PACKAGECONFIG ??= "eh rtti shared-libs ${@bb.utils.filter('DISTRO_FEATURES', 'lto thin-lto', d)}"
+PACKAGECONFIG:remove:class-native = "lto thin-lto"
+
+PACKAGECONFIG[eh] = "-DLLVM_ENABLE_EH=ON,-DLLVM_ENABLE_EH=OFF"
+PACKAGECONFIG[exegesis] = "-DLLVM_TOOL_LLVM_EXEGESIS_BUILD=ON,-DLLVM_TOOL_LLVM_EXEGESIS_BUILD=OFF"
+PACKAGECONFIG[libedit] = "-DLLVM_ENABLE_LIBEDIT=ON,-DLLVM_ENABLE_LIBEDIT=OFF,libedit"
+PACKAGECONFIG[rtti] = "-DLLVM_ENABLE_RTTI=ON,-DLLVM_ENABLE_RTTI=OFF"
+PACKAGECONFIG[shared-libs] = "-DLLVM_BUILD_LLVM_DYLIB=ON -DLLVM_LINK_LLVM_DYLIB=ON,-DLLVM_BUILD_LLVM_DYLIB=OFF -DLLVM_LINK_LLVM_DYLIB=OFF"
+PACKAGECONFIG[split-dwarf] = "-DLLVM_USE_SPLIT_DWARF=ON,-DLLVM_USE_SPLIT_DWARF=OFF"
+PACKAGECONFIG[opt-viewer] = "-DLLVM_TOOL_OPT_VIEWER_BUILD=ON,-DLLVM_TOOL_OPT_VIEWER_BUILD=OFF, \
+                             python3-pyyaml-native python3-pygments-native python3-pyyaml python3-pygments, \
+                             python3-pyyaml python3-pygments,"
+PACKAGECONFIG[lto] = "-DLLVM_ENABLE_LTO=Full -DLLVM_BINUTILS_INCDIR=${STAGING_INCDIR},,binutils,"
+PACKAGECONFIG[thin-lto] = "-DLLVM_ENABLE_LTO=Thin -DLLVM_BINUTILS_INCDIR=${STAGING_INCDIR},,binutils,"
+
+# LLVM debug symbols are very large (several gigabytes), reduce the debug level
+# so they're just hundreds of megabytes.
+DEBUG_LEVELFLAG = "-g1"
+
+reproducible_build_variables() {
+    sed -i -e "s,${DEBUG_PREFIX_MAP},,g" \
+        -e "s,--sysroot=${RECIPE_SYSROOT},,g" \
+        -e "s,${STAGING_DIR_HOST},,g" \
+        -e "s,${S}/llvm,,g"  \
+        -e "s,${B},,g" \
+        ${B}/tools/llvm-config/BuildVariables.inc
+}
+
+do_configure:append:class-target() {
+    reproducible_build_variables
+}
+do_configure:append:class-nativesdk() {
+    reproducible_build_variables
+}
+
+do_install:append() {
+    # llvm hardcodes lib as install path, this corrects it to actual libdir.
+    # https://github.com/llvm/llvm-project/issues/152193
+    if [ -d ${D}/${prefix}/lib -a ! -d ${D}/${libdir} ]; then
+        mv ${D}/${prefix}/lib ${D}/${libdir}
+    fi
+
+    # Reproducibility fixes
+    sed -i -e 's,${WORKDIR},,g' ${D}/${libdir}/cmake/llvm/LLVMConfig.cmake
+}
+
+do_install:append:class-native() {
+    # These are provided by llvm-tblgen-native
+    rm ${D}${bindir}/*-tblgen
+}
+
+SYSROOT_PREPROCESS_FUNCS:append:class-target = " llvm_sysroot_preprocess"
+SYSROOT_PREPROCESS_FUNCS:append:class-nativesdk = " llvm_sysroot_preprocess"
+
+llvm_sysroot_preprocess() {
+        install -d ${SYSROOT_DESTDIR}${bindir_crossscripts}/
+        install -m 0755 ${S}/llvm/tools/llvm-config/llvm-config ${SYSROOT_DESTDIR}${bindir_crossscripts}/
+}
+
+FILES:${PN}-dev += "${libdir}/llvm-config"
+
+BBCLASSEXTEND = "native nativesdk"