Re: [Prec/RFA] fix build error of prec in cygwin

[Eli Zaretskii <eliz@gnu.org>]

> Date: Fri, 22 May 2009 16:42:06 +0800
> From: Hui Zhu <teawater@gmail.com>
> Cc: gdb-patches@sourceware.org
> 
> int
> main(int argc,char *argv[],char *envp[])
> {
> 	printf ("%uz", sizeof (int));
> 
> 	return (0);
> }
> 
> gcc -std=c89 -Wall -pedantic 1.c
> 
> No warning.

You are placing too much faith into -std= and -pedantic.  From the GCC
manual, node "Warning Options":

     Some users try to use `-pedantic' to check programs for strict ISO
     C conformance.  They soon find that it does not do quite what they
     want: it finds some non-ISO practices, but not all--only those for
     which ISO C _requires_ a diagnostic, and some others for which
     diagnostics have been added.

     A feature to report any failure to conform to ISO C might be
     useful in some instances, but would require considerable
     additional work and would be quite different from `-pedantic'.  We
     don't have plans to support such a feature in the near future.