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autoconf: feature request: test for GCC version


From: Philip Prindeville
Subject: autoconf: feature request: test for GCC version
Date: Wed, 13 Apr 2011 15:49:07 -0600
User-agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.15) Gecko/20110303 Thunderbird/3.1.9

It is sometimes useful to be able to detect the compiler version (as in the 
case of GCC 4.2 doing some fairly aggressive optimization that breaks fragile 
code).

How about something like:

AC_GCC_VERSION(VER, MATCHING-VERSION, [ NON-MATCHING-VERSION ])

so I could do something like:

AC_GCC_VERSION(4.2, [OPTIMIZE =], [OPTIMIZE = -O2])

Then I could avoid:

http://svnview.digium.com/svn/asterisk/branches/1.4/codecs/gsm/Makefile?r1=285817&r2=285816&pathrev=285817

Thanks.

-Philip



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