[v6,0/6] clang-merge: Bring clang recipes from meta-clang

Latest mesa 25+ needs libclang during build for tools like mesa_clc,
we enahnced already existing llvm recipe to build pieces of clang as
well, which worked for mesa's needs but broke static clang compiler
provided by meta-clang due to newfound conflicts, since clang is now
built with llvm recipe from core and also by meta-clang and they
compete for same namespace, an attempt to make them co-habit did reveal
more difficulties. Clang compiler from meta-clang is not able to use
llvm libraries from core since they patch them differently.

This patch series therefore brings clang and all recipes that build from
llvm sources into core. With this changeset, clang recipes can be removed
from meta-clang there is a pull request for that already [1]
As an aside, we only build clang once and use it for meta-clang needs
and core needs.

With this, meta-clang can depend upon core layer to provide clang and
related recipes, meta-clang will still provide the toolchain policies
around clang based toolchains. Clang compiler from core, while usable
for mesa is not yet fully usable out of box, since we need to workout
the multi-toolchain architecture for core, which will be done in next
phase after this merge.

[1] https://github.com/kraj/meta-clang/pull/1088

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
Changes in v6:
- Drop setting TOOLCHAIN variable in clang recipes
- Upgrade minor version of clang to 20.1.3
- Link to v5: https://lore.kernel.org/r/20250428-clang-merge-v5-0-c31e76e643e1@gmail.com

Changes in v5:
- Drop the llvm multilib patch, it needs more investigation.
- Fix compiler-rt-sanitizers build for qemuarm.
- Link to v4: https://lore.kernel.org/r/20250426-clang-merge-v4-0-42d205904261@gmail.com

Changes in v4:
- Set BINDGEN_EXTRA_CLANG_ARGS only for target recipe
- Link to v3: https://lore.kernel.org/r/20250425-clang-merge-v3-0-feea6f07d130@gmail.com

Changes in v3:
- Fix building mesa with openCL packageconfig.
- Fix buildpaths in libMesaOpenCL.so.1.0.0.
- Add mesa RPROVIDES for libclc and spirv-llvm-translator
- Link to v2: https://lore.kernel.org/r/20250424-clang-merge-v2-0-0a51d0c1940d@gmail.com

Changes in v2:
- Address Feedback from Alex and Dmitry.
- Squash similar commits to reduce number of patches.
- Move native toolchain file generation to cmake bbclass instead of
  adding new class
- Fix space/tabs indentation inconsistencies
- Reorder the patch sequence to avoid errors in future git bisects
- Fix use before define string problem in one of the patches
- Link to v1: https://lore.kernel.org/r/20250424-clang-merge-v1-0-5a492a8461aa@gmail.com

---
Khem Raj (6):
      clang: Merge llvm/clang family recipes from meta-clang
      clang: RPROVIDE spirv-llvm-translator and libclc
      mesa: Pass needed clang flags via BINDGEN_EXTRA_CLANG_ARGS
      mesa: Fix header search paths
      maintainers.inc: Add myself as maintainer for clang family of recipes
      clang: Upgrade to 20.1.3

 meta/conf/distro/include/maintainers.inc           |  11 +-
 .../clang/clang-cross-canadian_git.bb              |  36 ++
 meta/recipes-devtools/clang/clang-cross_git.bb     |  39 ++
 meta/recipes-devtools/clang/clang-crosssdk_git.bb  |  33 ++
 ...ind-libunwind-headers-when-LIBCXXABI_LIBU.patch |  60 +++
 ...er-rt-support-a-new-embedded-linux-target.patch | 309 +++++++++++++
 ...-Simplify-cross-compilation.-Don-t-use-na.patch |  44 ++
 ...LibraryInfo-Undefine-libc-functions-if-th.patch |  90 ++++
 ...allow-env-override-of-exe-and-libdir-path.patch |  71 +++
 ...-clang-driver-Check-sysroot-for-ldso-path.patch |  78 ++++
 ...iver-tools.cpp-Add-lssp_nonshared-on-musl.patch |  32 ++
 .../0008-clang-Prepend-trailing-to-sysroot.patch   |  39 ++
 ...inside-the-target-sysroot-for-compiler-ru.patch |  41 ++
 ...ang-Define-releative-gcc-installation-dir.patch | 123 +++++
 ...pthread-and-ldl-along-with-lunwind-for-st.patch |  35 ++
 ..._EXECUTABLE-when-cross-compiling-for-nati.patch |  24 +
 .../0013-Check-for-atomic-double-intrinsics.patch  |  34 ++
 ...configure-for-packages-using-find_package.patch |   2 +-
 ...esource-dir-location-for-cross-toolchains.patch |  50 +++
 ...r-Add-dyld-prefix-when-checking-sysroot-f.patch |  79 ++++
 .../0017-clang-Use-python3-in-python-scripts.patch |  35 ++
 ...Insert-anchor-for-adding-OE-distro-vendor.patch | 167 +++++++
 ...-Do-not-use-backtrace-APIs-on-non-glibc-l.patch |  68 +++
 ...86-triple-for-non-debian-multiarch-linux-.patch |  28 ++
 ...0021-libunwind-Added-unw_backtrace-method.patch |  56 +++
 .../0022-lldb-Link-with-libatomic-on-x86.patch     |  33 ++
 ...023-compiler-rt-Enable-__int128-for-ppc32.patch |  73 +++
 ...-Do-not-use-cmake-infra-to-detect-libzstd.patch |  62 +++
 ...ler-rt-Fix-stat-struct-s-size-for-O32-ABI.patch |  46 ++
 ...-Undef-_TIME_BITS-along-with-_FILE_OFFSET.patch |  43 ++
 ...s-Gnu.cpp-ARMLibDirs-search-also-in-lib32.patch |  81 ++++
 ...vm-Add-OE-specific-ABI-triple-for-N32-ABI.patch |  78 ++++
 ...d-libunwind.pc.in-and-llvm-config-scripts.patch |  90 ++++
 ...py-respect-LLVM_LIBDIR_SUFFIX-like-other-.patch |  92 ++++
 ...r-rt-Do-not-pass-target-to-clang-compiler.patch |  29 ++
 .../clang/clang/0032-Fix-build-on-ppc64-musl.patch |  97 ++++
 ...d-a-build-option-to-disable-building-dexp.patch |  85 ++++
 ...itter-sort-ClassInfo-lists-by-name-as-we.patch} |   4 +-
 ...-remove-LLVM_LDFLAGS-from-ldflags-output.patch} |  12 +-
 ...ot-emit-date-and-time-into-generate-files.patch |  37 ++
 .../clang}/spirv-internal-build.patch              |   0
 .../clang}/spirv-shared-library.patch              |   0
 meta/recipes-devtools/clang/clang_git.bb           | 495 +++++++++++++++++++++
 meta/recipes-devtools/clang/common-clang.inc       |  24 +
 meta/recipes-devtools/clang/common-source.inc      |  17 +
 meta/recipes-devtools/clang/common.inc             |  83 ++++
 .../clang/compiler-rt-sanitizers_git.bb            | 131 ++++++
 meta/recipes-devtools/clang/compiler-rt_git.bb     | 121 +++++
 meta/recipes-devtools/clang/libcxx_git.bb          | 115 +++++
 meta/recipes-devtools/clang/llvm-project-source.bb |  12 +
 .../recipes-devtools/clang/llvm-project-source.inc |  99 +++++
 .../recipes-devtools/clang/nativesdk-clang-glue.bb |  36 ++
 meta/recipes-devtools/clang/openmp_git.bb          |  65 +++
 .../0007-llvm-allow-env-override-of-exe-path.patch |  36 --
 meta/recipes-devtools/llvm/llvm/llvm-config        |  54 ---
 meta/recipes-devtools/llvm/llvm_20.1.2.bb          | 233 ----------
 .../0001-clover-Don-t-include-libclc-headers.patch | 143 ++++++
 ...ver-Do-not-use-LLVM_LIBRARY_DIR-for-FALLB.patch |  34 ++
 meta/recipes-graphics/mesa/mesa.inc                |   6 +
 59 files changed, 3816 insertions(+), 334 deletions(-)
---
base-commit: 43fd724eac29dd6187e0e4bf777ee59898dc92ca
change-id: 20250423-clang-merge-ca9130ae95af

Best regards,