Prior to the change, the output was fetched from stdout, but it was actually coming through stderr. (Probably a regression.)
I changed it aggregate from both stdout and stderr, which restores the previously intended behavior of Gnu95FCompiler.get_target to identify the target architecture, which in my case is x86_64-w64-mingw32.
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Backport of #21959.
The line changed here fetches the output of gfortran -v, which on my machine looks like this:
Prior to the change, the output was fetched from stdout, but it was actually coming through stderr. (Probably a regression.)
I changed it aggregate from both stdout and stderr, which restores the previously intended behavior of Gnu95FCompiler.get_target to identify the target architecture, which in my case is x86_64-w64-mingw32.
Closes #21942