BUG: Use Popen to silently invoke f77 -v
#22037
Merged
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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 throughstderr. (Probably a regression.)I changed it aggregate from both
stdoutandstderr, which restores the previously intended behavior ofGnu95FCompiler.get_targetto identify the target architecture, which in my case isx86_64-w64-mingw32.Closes #21942