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[Bug 1141059] Recent zlib changes cause build failure of qemu-linux-user on ppc64le
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Thu, 11 Jul 2019 06:20:16 +0000
  • Message-id: <>

Martin Liška <martin.liska@xxxxxxxx> changed:

What |Removed |Added
CC| |martin.liska@xxxxxxxx

--- Comment #3 from Martin Liška <martin.liska@xxxxxxxx> ---
(In reply to Bruce Rogers from comment #0)
building qemu-linux-user for ppc64le,

I get the following build error now:
[ 757s]
o) and
o): warning: multiple common of `__cache_line_size'
[ 757s] crc32.c:247:15: error: type of 'crc32_vpmsum' does not match
original declaration [-Werror=lto-type-mismatch]
[ 757s] contrib/power8-crc/vec_crc32.c:73:14: note: return value type
[ 757s] contrib/power8-crc/vec_crc32.c:73:14: note: type 'unsigned int'
should match type 'long unsigned int'
[ 757s] contrib/power8-crc/vec_crc32.c:73:14: note: 'crc32_vpmsum' was
previously declared here
[ 757s] contrib/power8-crc/vec_crc32.c:73:14: note: code may be
misoptimized unless '-fno-strict-aliasing' is used
[ 757s] lto1: all warnings being treated as errors
[ 757s] lto-wrapper: fatal error: c++ returned 1 exit status
[ 757s] compilation terminated.
[ 757s]
bin/ld: error: lto-wrapper failed
[ 757s] collect2: error: ld returned 1 exit status
[ 757s] make[1]: *** [Makefile:218: qemu-aarch64_be] Error 1
[ 757s] make[1]: Leaving directory
[ 757s] make: *** [Makefile:472: aarch64_be-linux-user/all] Error 2
[ 757s] error: Bad exit status from /var/tmp/rpm-tmp.yplz4T (%build)

It appears to be related to our settings that warnings are errors, and
recent lto enabling activity in zlib. At least, that is my analysis so far.
Please investigate.

Yes, the enablement of LTO adds new warnings. I would recommend following what
the warning says. It's most likely an issue in crc32.c.

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