[flang-commits] [flang] [flang][Runtime] Add SIGNAL intrinisic (PR #79337)

[Tom Eccles via flang-commits]

tblah wrote:

I'm not sure what went wrong with Windows CI, but it probably is not related to this patch. I'll run it again after rebasing.
```
[5379/5382] Generating ../../../../include/flang/ieee_exceptions.f18.mod
[5380/5382] Generating ../../../../incllvm-lit.py: C:\ws\src\llvm\utils\lit\lit\llvm\config.py:57: note: using lit tools: C:\Program Files\Git\usr\bin
llvm-lit.py: C:\ws\src\llvm\utils\lit\lit\llvm\config.py:270: fatal: Could not run process ['C:/ws/src/build/./bin\\llvm-config', '--assertion-mode']
lude/flang/ieee_arithmetic.mod
[5381/5382] Generating ../../../../include/flang/ieee_arithmetic.f18.mod
[5381/5382] Running the Flang regression tests
FAILED: tools/flang/test/CMakeFiles/check-flang
cmd.exe /C "cd /D C:\ws\src\build\tools\flang\test && C:\Python39\python.exe C:/ws/src/build/./bin/llvm-lit.py -v --xunit-xml-output C:/ws/src/build/test-results.xml --timeout=1200 --time-tests --param flang_site_config=C:/ws/src/build/tools/flang/test/lit.site.cfg.py C:/ws/src/build/tools/flang/test"
ninja: build stopped: subcommand failed.
```

https://github.com/llvm/llvm-project/pull/79337