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From: Nick <>
Subject: elfutils does not compile with gcc 12.2.0
Date: Wed, 24 Aug 2022 22:51:13 +0200	[thread overview]
Message-ID: <> (raw)

I try to compile elfutils on OpenWrt with the newest gcc 12.2.0 version. 
However, it fails due to -Werror=use-after-free. A workaround is a patch 
that I found on the mailinglist, to disable -Werror 
I modified it to apply to newest elfutils version. The error with 
elfutils 0.187 and gcc 12.2.0:

In function 'bigger_buffer',
     inlined from '__libdw_gunzip' at gzip.c:376:12:
gzip.c:98:9: error: pointer may be used after 'realloc' 
    98 |     b = realloc (state->buffer, more -= 1024);
       |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
gzip.c:96:13: note: call to 'realloc' here
    96 |   char *b = realloc (state->buffer, more);
       |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

cc1: all warnings being treated as errors

Can you apply the patch to disable werror? Or is it necessary to use 
some "#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wuse-after-free""-statement?


             reply	other threads:[~2022-08-24 20:51 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-24 20:51 Nick [this message]
2022-08-24 21:01 ` Dmitry V. Levin
2022-08-25  8:51   ` Nick

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