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Re: Target-specific CFLAGS
- From: Bob Friesenhahn <bfriesen at simple dot dallas dot tx dot us>
- To: Ben Pfaff <blp at cs dot stanford dot edu>
- Cc: automake at gnu dot org
- Date: Tue, 24 Feb 2004 17:24:30 -0600 (CST)
- Subject: Re: Target-specific CFLAGS
On Tue, 24 Feb 2004, Ben Pfaff wrote:
> Bob Friesenhahn <bfriesen@simple.dallas.tx.us> writes:
>
> > On Tue, 24 Feb 2004, Ben Pfaff wrote:
> >> >
> >> > Of course, when my source files are C++ files the _CFLAGS extension does
> >> > nothing. Changing this to _CPPFLAGS fixed the problem. Duh.
> >>
> >> You know that CPPFLAGS is for the C preprocessor and CXXFLAGS is
> >> for the C++ compiler, right?
> >
> > This distinction is not entirely correct since CPPFLAGS is normally
> > supplied to the C++ compiler as well. CFLAGS is for the C compiler
> > and CXXFLAGS is for the C++ compiler.
>
> Well, yes: C++ uses the C preprocessor.
Which is not really a great assumption since C++ is a different
language and the C++ compiler vendor may not be the same as the C
compiler vendor. The behavior of the C++ preprocessing may behave
differently. Autoconf and Automake make a lot of assumptions when it
comes to C++. Luckily the assumptions are correct more often than
not.
Bob
======================================
Bob Friesenhahn
bfriesen@simple.dallas.tx.us
http://www.simplesystems.org/users/bfriesen