Reproducible flag breaks builds on Fedora

[hrw]

Describe the bug

During build of catch for Fedora/RISC-V we have build failure each time:

RPM build errors:
error: Empty %files file /builddir/build/BUILD/catch-3.13.0-build/Catch2-3.13.0/debugsourcefiles.list
    Empty %files file /builddir/build/BUILD/catch-3.13.0-build/Catch2-3.13.0/debugsourcefiles.list

We disabled generation of those files and moved on.

Package builds fine for the rest of Fedora architectures (x86-64, aarch64, ppc64le, s390x) because they have LTO enabled and RISC-V builds have LTO disabled due to low memory builders.

I gave build log and source to the Claude agent and got "if we drop -ffile-prefix-map then it will build". And it does.

I understand that this flag was added to keep builds reproducible, but I think that even with it removed, each rebuild of Fedora package will have exactly same directory used for sources.

Expected behavior

Package builds fine.

Reproduction steps
Steps to reproduce the bug.

Platform information:

• OS: Fedora Linux (since F41)
• Compiler+version: GCC (15.2.1 or above, no info for older versions)
• Catch version: 3.7.1 or above (we did not built older versions)

Additional context

https://src.fedoraproject.org/rpms/catch/pull-request/7 is PR for Fedora package

[andreabolognani]

I don't think any change is needed upstream.

The problem really lies with Fedora tooling, and the upstream build system already exposes a CATCH_ENABLE_REPRODUCIBLE_BUILD option that can be conveniently used by distro packages to turn off the offending behavior.

@hrw I suggest closing this.

[hrw]

Thanks, I somehow missed that option.