[3.13] GH-115869: Make jit_stencils.h reproducible (GH-127166) - #154988
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bmwiedemann
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brandtbucher and
savannahostrowski
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July 31, 2026 10:45
…7166) Keep the build tmpdir out of jit_stencils.h llvm-objdump prints the path of the object file it disassembles, and the JIT builds every stencil in a fresh tempfile.TemporaryDirectory(). That random path ended up verbatim in the disassembly comments of the generated jit_stencils.h, so two builds of the same source never produced the same header: // /tmp/tmp164olvmi/_BINARY_OP.o: file format elf64-x86-64 +// /tmp/tmpmufvewt2/_BINARY_OP.o: file format elf64-x86-64 Replace the full path with the bare file name. Only the _parse() hunk of that commit is taken here; the rest of it depends on refactorings that are not in 3.13. (cherry picked from commit 17c16ae) Co-authored-by: Brandt Bucher <brandtbucher@microsoft.com>
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Keep the build tmpdir out of jit_stencils.h
llvm-objdump prints the path of the object file it disassembles, and the JIT builds every stencil in a fresh tempfile.TemporaryDirectory(). That random path ended up verbatim in the disassembly comments of the generated jit_stencils.h, so two builds of the same source never produced the same header:
Replace the full path with the bare file name.
Only the _parse() hunk of that commit is taken here; the rest of it depends on refactorings that are not in 3.13.
(cherry picked from commit 17c16ae)
I tested that it works.
This PR was done while working on reproducible builds for openSUSE.
jit_stencils.h#115869