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Re: compiler specific cflags

From: Tom Tromey
Subject: Re: compiler specific cflags
Date: 20 Oct 2002 12:29:03 -0600
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2

>>>>> "Sean" == Sean MacLennan <address@hidden> writes:

Sean> I want to set the -Wall flags iff the compiler supports it
Sean> (i.e. is gcc). How do I do this? Specifically checking for gcc
Sean> is fine.

In configure, if the compiler is gcc, then put the flags you want into

Read about AC_PROG_CC to see how to check whether gcc is in use.
There's a pre-existing variable.

Sean> As a secondary concern, I also want to set the flags based on a
Sean> given architecture. I guess I really want to know how automake
Sean> chooses the default cflags.

Automake doesn't, autoconf does.

In general, avoid architecture-specific stuff if possible.
If not possible, see AC_CANONICAL_HOST and friends.


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