meson: De-dup rpath arguments #13819
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This fixes spammy warnings on apple clang: ld: warning: duplicate -rpath 'build/dist/darwin_universal/arm64/lib/pkgconfig/../../lib' ignored
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Trivially correct patch, IMO. Will merge in 5 days if there are no complaints. |
This was merged with failing CI and the CI failure is directly related to the code change itself. (OT: still getting back into the flow of things after being entirely off for the holiday.) |
eli-schwartz
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Oct 31, 2024
This reverts commit 8242187. This same change was previously introduced in mesonbuild#12495 / commit 30ab974 and subsequently reverted in mesonbuild#12672 / commit 2fbc7b5 Reintroduced in mesonbuild#13819 but it's still the same old problem. To repeat the problem: This breaks at least: - frameworks/17 mpi - frameworks/30 scalapack The problem is that openmpi's pkg-config emitted link arguments includes: ``` -Wl,-rpath -Wl,/path/to/libdir ``` The deduplication logic in meson doesn't contain sufficient information to tell when the compiler is passing an argument that requires values, and definitely cannot tell when that argument is split across argv. But for arguments that *can* do this, it is not possible to deduplicate a single argument as standalone, because it is not standalone. The argument for deduplicating rpath here was that if you have multiple dependencies that all add the same rpath, the Apple ld64 emits a non-fatal warning "duplicate -rpath ignored". Since this is non-fatal, it's not a major issue. A major issue is when builds fatally error out with: ``` FAILED: scalapack_c cc -o scalapack_c scalapack_c.p/main.c.o -Wl,--as-needed -Wl,--no-undefined -Wl,--start-group /usr/lib64/libscalapack.so /usr/lib64/liblapack.so /usr/lib64/libblas.so -Wl,-rpath -Wl,/usr/lib64 -Wl,/usr/lib64 -Wl,--enable-new-dtags /usr/lib64/libmpi.so -Wl,--end-group /usr/libexec/gcc/x86_64-pc-linux-gnu/ld: error: /usr/lib64: read: Is a directory ```
eli-schwartz
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that referenced
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Oct 31, 2024
This reverts commit 8242187. This same change was previously introduced in mesonbuild#12495 / commit 30ab974 and subsequently reverted in mesonbuild#12672 / commit 2fbc7b5 Reintroduced in mesonbuild#13819 but it's still the same old problem. To repeat the problem: This breaks at least: - frameworks/17 mpi - frameworks/30 scalapack The problem is that openmpi's pkg-config emitted link arguments includes: ``` -Wl,-rpath -Wl,/path/to/libdir ``` The deduplication logic in meson doesn't contain sufficient information to tell when the compiler is passing an argument that requires values, and definitely cannot tell when that argument is split across argv. But for arguments that *can* do this, it is not possible to deduplicate a single argument as standalone, because it is not standalone. The argument for deduplicating rpath here was that if you have multiple dependencies that all add the same rpath, the Apple ld64 emits a non-fatal warning "duplicate -rpath ignored". Since this is non-fatal, it's not a major issue. A major issue is when builds fatally error out with: ``` FAILED: scalapack_c cc -o scalapack_c scalapack_c.p/main.c.o -Wl,--as-needed -Wl,--no-undefined -Wl,--start-group /usr/lib64/libscalapack.so /usr/lib64/liblapack.so /usr/lib64/libblas.so -Wl,-rpath -Wl,/usr/lib64 -Wl,/usr/lib64 -Wl,--enable-new-dtags /usr/lib64/libmpi.so -Wl,--end-group /usr/libexec/gcc/x86_64-pc-linux-gnu/ld: error: /usr/lib64: read: Is a directory ``` Today we have CI for this so the change actually caused our own unittest CI to go red.
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This fixes spammy warnings on apple clang:
ld: warning: duplicate -rpath 'build/dist/darwin_universal/arm64/lib/pkgconfig/../../lib' ignored