Hi Paul, Thanks for looking. Versions first, then the trigger, then what I have not yet established.
Layers, all pinned: openembedded-core wrynose f7397af248e1e338929d70a910b0fbc2341528ec bitbake 2.18 0ad6c1c34a5e07a5f8dd66ab248c1e7b37b69fa9 meta-openembedded wrynose 14282a02be9c74a1276a7cda7d6c89e054699a11 meta-qcom wrynose ef0004df267743cc89d6a09bc724bc99ff541c01 Target is aarch64, mesa 26.0.5, LLVM 22.1.3, bindgen from bindgen-cli-native. The trigger is only this: DISTRO_FEATURES:append = " opencl" which selects mesa's PACKAGECONFIG[opencl], so -Dgallium-rusticl=true, and the rusticl frontend runs bindgen over a C++ header. The failing command ends with -x c++ -std=c++17 on rusticl_llvm_bindings.hpp, and clang cannot find cassert from llvm/ADT/DenseMapInfo.h. What I cannot give you is a runnable command line: our DISTRO and MACHINE are in a layer I cannot share, and I have not yet reduced this to stock poky. I tried to on the shared builder this morning and it refused before parsing with ERROR: User namespaces are not usable by BitBake, possibly due to AppArmor. so that attempt proved nothing. Our own builds go through a wrapper that handles it. My reading is that nothing platform-specific is involved: bindgen_args() in meson.bbclass passes HOST_CC_ARCH, TOOLCHAIN_OPTIONS and --target, and none of those carry the libstdc++ include directories that clang needs when it cross-compiles against a GCC sysroot. Any meson recipe running bindgen over a C++ header should hit it. If that reasoning is wrong I would rather know than have you chase our stack. Happy to build a stock qemuarm64 case with opencl in DISTRO_FEATURES on a machine without the namespace restriction and report back, or to test a patch on aarch64, whichever is more useful. Royyan
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