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Message-ID: <4A4BF4A2.8030607@gmail.com>
Date: Wed, 01 Jul 2009 20:43:30 -0300
From: Kevin Winchester <kjwinchester@gmail.com>
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To: Ingo Molnar <mingo@elte.hu>
CC: LKML <linux-kernel@vger.kernel.org>
Subject: tools/perf compile error: ignoring return value of 'read', declared
 with attribute warn_unused_result
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    CC builtin-stat.o
cc1: warnings being treated as errors
builtin-stat.c: In function 'run_perf_stat':
builtin-stat.c:243: error: ignoring return value of 'read', declared with attribute warn_unused_result
builtin-stat.c:256: error: ignoring return value of 'read', declared with attribute warn_unused_result
make: *** [builtin-stat.o] Error 1

Apparently my version of gcc and/or glibc do not agree with -Werror.  Would the fix be as simple as:

    if *read(go_pipe[0], &buf, 1) < 0) {
            perror("Failed to read go_pipe.");
            exit(1);
    }

?

-- 
Kevin Winchester