Hide stderr from --keep-system-libs #6261
Merged
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After merging #6138, I now notice that when I install Pillow, I see
Unknown option --keep-system-libs
in the output.This in itself it not unexpected. #6138 is seeing if pkg-config is actually pkgconf, and the error results if it is not.
However, we should not bother the user with this. This PR hides
stderr
on the first call.