[Bug c/40960] POSIX requires that option -D have a lower precedence than -U

[joseph at codesourcery dot com]

------- Comment #4 from joseph at codesourcery dot com  2009-08-04 14:54 -------
Subject: Re:  POSIX requires that option -D have a lower precedence
 than -U

On Tue, 4 Aug 2009, vincent at vinc17 dot org wrote:

> There would the possibility to have a POSIX mode implied by c99, but I don't
> think having different behaviors would be a good idea. IMHO, Makefiles should

I think that installing a variant driver program as "c99", that implements 
the different semantics, is exactly the right thing to do here; the 
present semantics are more useful for "gcc".  We should have a configure 
option to install "cc", "c89" and "c99" drivers; they should have 
appropriate defaults regarding e.g. standards mode, and should also adjust 
the precedence of these options and make any other adjustments required by 
POSIX that aren't appropriate for "gcc".


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40960