compiler-rt and libcxx contain reference to TMPDIR [buildpaths]

[fidelski]

What is happening
In the current master the build of a system that requests CLANGSDK = "1" and adds the following toolchain host tasks:

TOOLCHAIN_HOST_TASK:append = "\
    nativesdk-clang-format \
    nativesdk-clang-tidy \
    nativesdk-clang-tools \
    nativesdk-cmake \
    nativesdk-lldb \
"

fails due to errors relating to QA Issues:

ERROR: compiler-rt-18.1.8-r0 do_package_qa: QA Issue: File /usr/lib/clang/18.1.8/lib/linux/libclang_rt.builtins-powerpc64.a in package compiler-rt-staticdev contains reference to TMPDIR
File /usr/lib/clang/18.1.8/lib/linux/liborc_rt-powerpc64.a in package compiler-rt-staticdev contains reference to TMPDIR [buildpaths]
ERROR: compiler-rt-18.1.8-r0 do_package_qa: Fatal QA errors were found, failing task.
ERROR: Logfile of failure stored in: /mnt/data/yocto/bf133/build/tmp/work/ppc64e5500-vrag-linux/compiler-rt/18.1.8/temp/log.do_package_qa.4021297
ERROR: Task (/mnt/data/yocto/bf133/meta-clang/recipes-devtools/clang/compiler-rt_git.bb:do_package_qa) failed with exit code '1'
ERROR: libcxx-18.1.8-r0 do_package_qa: QA Issue: File /usr/lib64/.debug/libc++abi.so.1.0 in package libcxx-dbg contains reference to TMPDIR
File /usr/lib64/.debug/libc++.so.1.0 in package libcxx-dbg contains reference to TMPDIR [buildpaths]
ERROR: libcxx-18.1.8-r0 do_package_qa: QA Issue: File /usr/lib64/libc++.a in package libcxx-staticdev contains reference to TMPDIR
File /usr/lib64/libc++abi.a in package libcxx-staticdev contains reference to TMPDIR
File /usr/lib64/libc++experimental.a in package libcxx-staticdev contains reference to TMPDIR [buildpaths]
ERROR: libcxx-18.1.8-r0 do_package_qa: Fatal QA errors were found, failing task.
ERROR: Logfile of failure stored in: /mnt/data/yocto/bf133/build/tmp/work/ppc64e5500-vrag-linux/libcxx/18.1.8/temp/log.do_package_qa.4018378
ERROR: Task (/mnt/data/yocto/bf133/meta-clang/recipes-devtools/clang/libcxx_git.bb:do_package_qa) failed with exit code '1'

To Reproduce
Steps to reproduce the behavior:

1. Use current master of meta-clang
2. Enter CLANGSDK = "1" in the build configuration
3. run bitbake {myimage}
4. The build fails with the error shown

Expected behavior
The build succeeds and the Clang SDK is built correctly.

Seen elsewhere
It seems related or at leas similar to #645

[fidelski]

It appears that only files within */.debug are affected. Clang puts its version info with a full path to the binary into the corresponding binary. Eg:

$ strings ./tmp/work/bf133-vrag-linux/vrag-image/1.0/rootfs-dbg/usr/bin/.debug/llvm-ifs | grep -i ${PWD}
clang version 18.1.8 (/mnt/data/yocto/bf133/build/tmp/work-shared/llvm-project-source-18.1.8-r0/llvm-project-18.1.8.src/clang db87ca070c5a4790dcdb9601bcb35037603f6d7f)
.note.gnu.build-id

This is the case for about all the binaries within the .debug subfolder. I guess I am doing something wrong here? I could happily live without those binaries. Is this possible?

[kraj]

I think we need to find the place in llvm sources where the source path is being emitted into clang -v output it should just emit

clang version 18.1.8

[kraj]

@fidelski Are you using tip of master branch or some other branch ? we have recently switched away from building the compiler from git checkout and resorted to tarballs but I see your build is coming out of a git tree which is in TMPDIR

I think cmake's git version and repo url detection logic is getting triggerred and doing unwanted things here

I have a patch here
#993

Please try it out and lemme know.

[fidelski]

Thanks a lot for your quick response and patch! I was using tip of master branch, no idea why it should build differently here 🤷‍♂️
Your patch does work, I needed to add -DLLVM_APPEND_VC_REV=OFF to basically all occurrences of EXTRA_OECMAKE though, only setting it in clang_git.bb was not sufficient.

[EDIT] I was too early here - I still get an error regarding to liblldb:

ERROR: nativesdk-clang-18.1.8-r0 do_package_qa: QA Issue: File /usr/local/oe-sdk-hardcoded-buildpath/sysroots/x86_64-pokysdk-linux/usr/lib/liblldb.so.18.1.8 in package nativesdk-liblldb contains reference to TMP
DIR [buildpaths]
ERROR: nativesdk-clang-18.1.8-r0 do_package_qa: Fatal QA errors were found, failing task.
ERROR: Logfile of failure stored in: /mnt/data/yocto/bf133/build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-clang/18.1.8/temp/log.do_package_qa.349469
ERROR: Task (virtual:nativesdk:/mnt/data/yocto/bf133/meta-clang/recipes-devtools/clang/clang_git.bb:do_package_qa) failed with exit code '1'

This puzzles me, the file inspected is within a path oe-sdk-hardcoded-buildpath and this one does indeed contain some hardcoded path within the build folder (/usr/local/oe-sdk-hardcoded-buildpath/sysroots/x86_64-pokysdk-linux/usr/lib/python3.12/site-packages). But the file at build/tmp/work/ppc64e5500-vrag-linux/clang/18.1.8/packages-split/liblldb/usr/lib64/liblldb.so.18.1.8 does not contain the path. There are some path fragments present though, like ./build-id/, /buildid/(.*)/debuginfo etc. but nothing that corresponds to a path within the build directory. My guess is that those are stripped, but why the other ones are inspected goes beyond my knowledge.

[kraj]

should be fixed now.