Re: Autoconf does not like "-D_FORTIFY_SOURCE=2 -O2"

[Mike Frysinger]

On Thursday 09 May 2013 11:24:27 Zack Weinberg wrote:
> (That said, I've never been clear myself on why CFLAGS and CPPFLAGS
> *are* separate, except possibly the now-long-obsolete historical
> reason that some traditional preprocessors didn't accept arbitrary
> compiler options.)

because there are C-specific flags (CFLAGS) and C++-specific flags (CXXFLAGS) 
and 
Fortran-specific flags (FFLAGS) and .... but they all use the same preprocessor 
(CPPFLAGS)
-mike

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