Commit f002eb5a breaks our build

[aprospero]

Prerequisites

Yocto Build on Scarthgap, sdk build for x86_64 - crossplatform ARM cortex a9.

Symptoms

The task do_install for recipe nativesdk-clang fails with an error:

| sed: can't read /yoctolinux/build/tmp/work/x86_64-nativesdk-sdk-linux/nativesdk-clang/18.1.6/image/opt/xxx/cortexa9t2hf-neon-scarthgap/sysroots/x86_64-sdk-linux/usr/lib/cmake/llvm/LLVMConfig.cmake: No such file or directory

| WARNING: exit code 2 from a shell command.

ERROR: Task (virtual:nativesdk:yoctolinux/artifacts/github.com/kraj/meta-clang/recipes-devtools/clang/clang_git.bb:do_install) failed with exit code '1'

Reproduction

vanilla build on current scarthgap (commit 8c77b42)

with

EXTRA_OECMAKE:append:pn-nativesdk-clang = " -DLLVM_INSTALL_TOOLCHAIN_ONLY=ON"

as suggested here:

https://llvm.org/docs/BuildingADistribution.html

Expected behavior

No error. ;)

Findings

Commit f002eb5 doesn't seem to take into account that LLVMConfig.cmake doesn't exist - or the creation of LLVMConfig.cmake broke silently.

[kraj]

Thanks for report, it can be fixed by checking the .cmake file for existing before operating on it.

if [ -e ${D}${libdir}/cmake/llvm/LLVMConfig.cmake ]
    sed -i -e 's,${B},,g' ${D}${libdir}/cmake/llvm/LLVMConfig.cmake
fi

would be ok. Can you test this fix and if it works for you then send a PR against master ( if master needs it ) and scarthgap

[aprospero]

Sure thing - I'll attend to it when I'm back to keyboard.