[compiler-rt] [builtins] Fix divtc3.c etc. compilation on Solaris/SPARC with gcc (PR #101662)

[Zibi Sarbinowski via llvm-commits]

zibi2 wrote:

> Me knowing nothing about z/OS and not having access to such a system, could you please provide the output of the compilation of `divtc3.c` with `-g3 -dD -save-temps` added? Going through the maze of macro definitions was bad enough when I had to on SPARC, on a foreign system it's pure guesswork.

Thank you for responding. The -save-temps` does not work. I'm going to attached output from compiling `divtc3.c` with `--dD -E`  added.
[divthc3.c.txt](https://github.com/user-attachments/files/16625525/divthc3.c.txt)

> Given that the patch has been in for two weeks without complaint, could you give me a day or two to investigate and come up with a fix? This avoid the constant churn of Revert/Reland/Re-Revert/Re-Reland. Thanks.

Waiting fews days should be fine with us,.


https://github.com/llvm/llvm-project/pull/101662