[all-commits] [llvm/llvm-project] 4e81ee: [Driver] Use AddRunTimeLibs on Solaris (#137596)

[Rainer Orth via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4e81ee4a158b7c8e4b468c9370abb042a59129b6
      https://github.com/llvm/llvm-project/commit/4e81ee4a158b7c8e4b468c9370abb042a59129b6
  Author: Rainer Orth <ro at gcc.gnu.org>
  Date:   2025-05-04 (Sun, 04 May 2025)

  Changed paths:
    M clang/lib/Driver/ToolChains/Solaris.cpp
    M clang/test/Driver/solaris-ld.c

  Log Message:
  -----------
  [Driver] Use AddRunTimeLibs on Solaris (#137596)

When linking `libomp.so` on Solaris, I encountered
```
clang: warning: argument unused during compilation: '-static-libgcc' [-Wunused-command-line-argument]

```
This happens because `Solaris.cpp` (`solaris::Linker::ConstructJob`)
links `-lgcc_s` and `-lgcc` on its own instead of using the common
`CommonArgs.cpp` (`tools::AddRunTimeLibs`) which handles
`-static-libgcc` out of the box.

This patch switches to `AddRunTimeLibs` and adds a test for
`-static-libgcc` handling. In `solaris-ld.c`, a few tests had to be
adjusted because `-lgcc` is now linked before `-lgcc_s`.

Tested on `amd64-pc-solaris2.11` and `sparcv9-sun-solaris2.11`.



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