Paolo Bonzini wrote: > On 03/23/2010 10:05 AM, Jim Meyering wrote: >> Testing with other versions of gcc, I encountered these >> warnings from gcc-4.1.2 (mapped to error with -Werror): >> >> cc1: warnings being treated as errors >> dfa.c: In function 'lex': >> dfa.c:467: warning: 'wc' may be used uninitialized in this function >> dfa.c:463: warning: 'c' may be used uninitialized in this function >> dfa.c:467: warning: 'wc2' may be used uninitialized in this function >> dfa.c:467: warning: 'wc1' may be used uninitialized in this function >> dfa.c:463: warning: 'c2' may be used uninitialized in this function >> make[2]: *** [dfa.o] Error 1 >> >> And in a way, they seem legitimate, assuming that older gcc doesn't >> recognize "error (EXIT_TROUBLE, ..." as something that resolves to >> exit (EXIT_TROUBLE). >> >> The clang static analyzer makes the same "mistake" in reporting a >> false-positive "used-uninitialized" warning, so I wrote the following >> patch, which is sufficient to teach both clang and gcc-4.1.2 enough >> that they no longer give FP warnings. >> >> It's risky to do *anything* this close to release, but I've confirmed >> this solves the problem and everything still builds on numerous systems, >> so unless someone points out a problem very soon, I'll push it and it >> will be included in grep-2.6. > > Yes, good idea.
Thanks for the confirmation.
