[krbdev.mit.edu #7080] failures to compile src/lib/krb5/krb/x-deltat.y with GCC 4.7

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Date: Mon, 23 Jan 2012 17:55:33 -0500
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To: krb5-bugs at mit.edu
Subject: compilation error with GCC 4.7
From: nalin at redhat.com
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>Submitter-Id:	net
>Originator:	
>Organization:
>Confidential:	no
>Synopsis:	failures to compile src/lib/krb5/krb/x-deltat.y with GCC 4.7
>Severity:	non-critical
>Priority:	medium
>Category:	krb5-libs
>Class:		change-request
>Release:	1.10-beta1
>Environment:
	
System: Linux blade.bos.redhat.com 3.2.1-5.fc17.x86_64 #1 SMP Tue Jan 17 18:57:18 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
Architecture: x86_64

>Description:
	When building the krb5 tree with the newer version of GCC in Fedora's
	development tree, we trigger its new "maybe-uninitialized" warning in
	yyparse() in src/lib/krb5/krb/x-deltat.y:
	deltat.c:1731:12: error: ‘yylval’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
>Fix:
	We already suppress the "uninitialized" warning in the generated .c
	file by using a #pragma, and we can suppress this one by adding 
	    #pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
	right after the existing one for "-Wuninitialized".