Commits on Mar 28, 2022

1. Fix CC logic in configure …

   In e9a52aa,
   the logic was changed to try check harder for GCC, but it dropped
   the default setting of cc=${CC}. It was throwing away any pre-set CC value as
   a result.
   
   The rest of the script then cascades down a bad path because it's convinced
   it's not GCC or a GCC-like compiler.
   
   This led to e.g. misdetection of inability to build shared libs
   for say, multilib cases (w/ CC being one thing from the environment being used
   for one test (e.g. x86_64-unknown-linux-gnu-gcc -m32 and then 'cc' used for
   shared libs (but missing "-m32"!)). Obviously just one example of how
   the old logic could break.
   
   This restores the old default of 'CC' if nothing overrides it later
   in configure.
   
   Bug: https://bugs.gentoo.org/836308
   Signed-off-by: Sam James <sam@gentoo.org>

   

   thesamesam committed Mar 28, 2022
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