[issue8211] configure: allow user-provided CFLAGS to override AC_PROG_CC defaults

[Marc-Andre Lemburg]

Marc-Andre Lemburg <mal at egenix.com> added the comment:

Mark Dickinson wrote:
> 
> Mark Dickinson <dickinsm at gmail.com> added the comment:
> 
> Since r80665, a
> 
> ./configure --with-pydebug
> 
> seems to give compilation with -O2 (tested on OS X and Linux).  Is this intentional?

Yes. I've restored the previous behavior of configure to
have AC_PROG_CC determine CFLAGS defaults.

Please open a new ticket to have --with-pydebug disable use
of any optimization flags. We need to find a different
solution for that. Unconditionally ignoring the AC_PROG_CC
CFLAGS defaults is not solution.

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