| Issue |
79720
|
| Summary |
Darwin: cross compiling with -mfpmath=sse generates error when builiding with an arm64 slice
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
kencu
|
When cross-compiling a project (in this case graphite https://github.com/silnrsi/graphite) errors occur when trying to build as both -arch=arm64 -arch=x86_64 at one time.
The build uses ```-mfpmath=sse -msse2``` which are valid flags for the Intel compilation. Rather than simply being ignored by arm64 compilation phase, an error is generated:
```
error: unknown FP unit 'sse'
```
I believe this occurs because the arm compilation does not recognize the fpmath setting:
https://github.com/llvm/llvm-project/blob/7089c012ec08450b1d8050b6b1d85a00505aa51a/clang/lib/Basic/Targets.cpp#L802
To allow cross-compilation to proceed smoothly, would it not be best for that setting to be ignored, rather than generate an error?
Is there a better approach, other than separate builds and a post-build lipo phase?
Thanks to all.
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