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Re: followup to segfault/builtin_expect


From: Andreas Jaeger
Subject: Re: followup to segfault/builtin_expect
Date: 14 Jan 2001 12:31:01 +0100
User-agent: Gnus/5.090001 (Oort Gnus v0.01) XEmacs/21.1 (Channel Islands)

>>>>> David Ford writes:

 > I checked an older compile, of 2.2, and the config.log.
 > HAVE_BUILTIN_EXPECT is undefined in the previous compile and the
 > config.log shows a failure for it, however the config.h had it defined.

 > I undefined it and commented it out.  I'd recommed someone taking a peek
 > at the configure script to figure out why the failure resulted in a
 > success.

Please check it for yourself - it seem to work for everybody else.
The program is very simple:

int foo (int a)
{
  a = __builtin_expect (a, 10);
  return a == 10 ? 0 : 1;
}

Compile it with your comiler and check what happens.

Andreas
-- 
 Andreas Jaeger
  SuSE Labs address@hidden
   private address@hidden
    http://www.suse.de/~aj



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