[flang-commits] [clang] [flang] [clang][driver] When -fveclib=ArmPL flag is in use, always link against libamath (PR #116432)

[Paul Osmialowski via flang-commits]

pawosm-arm wrote:

> > with -fveclib=ArmPL -lamath put into a config file, it will always be linked with libamath, even if the user decides to use -fveclib=none
> 
> I think there might be a related issue with the approach in this patch too though, in that `-fveclib=ArmPL` will silently force linking to `amath` for _all_ math functions, rather than just the veclib functions, if we add `-lamath` as in this patch. I guess this could be resolved by changing the order of the `-l` options (i.e. have `-lm` first, so that symbols from it are selected first)?

I missed your comment, seems it's the same issue we were discussing with libamath team, They recommended to use `-lm -lamath -lm` chain of flags.

https://github.com/llvm/llvm-project/pull/116432