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
(https://sourceware.org/legacy-ml/elfutils-devel/imported/msg00994.html)
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'
[-Werror=use-after-free]
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?
Bests
Nick
