1612422 - Create a MinGW reproducible build job

Status: NEW

(Firefox Build System :: General: Unsupported Platforms, enhancement)

Description

[Tom Ritter [:tjr]]

Creating a MinGW reproducible build job would ensure we don't regress reproducibility for Tor Browser. (Or if we do regress it, we identify it immediately where and when.)

Comment 1

[Tom Ritter [:tjr]]

Attachment: Bug 1612422 - Create MinGW reproducible build jobs

Comment 2

[Tom Ritter [:tjr]]

New try run

Looked briefly, and can explain one of the differences:

In the .exe's there's a guid that appears right before a "LLD PDB" string. This is the guid of the pdb file.
It also appears in the same place/way in the pdb file.
It is generated from a hash of the pdb file; so once the pdb file is otherwise identical it should also be identical.
https://github.com/llvm/llvm-project/search?q=setHashPDBContentsToGUID&unscoped_q=setHashPDBContentsToGUID
https://github.com/llvm/llvm-project/blob/adcd02683856c30ba6f349279509acecd90063df/llvm/lib/DebugInfo/PDB/Native/PDBFileBuilder.cpp#L333-L348
https://github.com/llvm/llvm-project/blob/a39b14f0b42d6bd835dec448506660d77bbbb7c7/lld/COFF/PDB.cpp#L1739