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Bug 681928

Summary: media-libs/zimg-2.7.5 - In file included from .../work/zimg-release-2.7.5/src/zimg/colorspace/x86/operation_impl_sse2.cpp:7:0: /usr/lib/gcc/i686-pc-linux-gnu/7.3.0/include/emmintrin.h:641:1: error: inlining failed in call to always_inline ‘__m128i _mm_...
Product: Gentoo Linux Reporter: Will Simoneau <bugzilla>
Component: Current packagesAssignee: media-video herd <media-video>
Status: UNCONFIRMED ---    
Severity: normal CC: pacho
Priority: Normal    
Version: unspecified   
Hardware: x86   
OS: Linux   
See Also: https://bugs.gentoo.org/show_bug.cgi?id=688808
Whiteboard:
Package list:
Runtime testing required: ---
Attachments: emerge --info
build log

Description Will Simoneau 2019-03-28 14:22:07 UTC
media-libs/zimg-2.7.5.ebuild uses CPU_FLAGS_X86="sse" to control the --{enable,disable}-x86simd flag passed to the configure script. This looks wrong even at face value: CPU_FLAGS_X86="sse" is supposed to control usage of SSE1 *only*.

On Pentium3 (CPU_FLAGS_X86="mmx mmxext sse"), this results in the build attempting to use SSE2 instructions even though the target does not support them.

Reproducible: Always

Steps to Reproduce:
Build media-libs/zimg-2.7.5 for an x86 target with >=SSE2 disabled.
Comment 1 Will Simoneau 2019-03-28 14:23:06 UTC
Created attachment 571040 [details]
emerge --info
Comment 2 Will Simoneau 2019-03-28 14:23:41 UTC
Created attachment 571042 [details]
build log
Comment 3 Pacho Ramos gentoo-dev 2019-04-19 17:15:52 UTC
current stable also has this issue

what USE flag should be used instead ? :/
Comment 4 Will Simoneau 2019-04-22 13:25:11 UTC
(In reply to Pacho Ramos from comment #3)
> current stable also has this issue
> 
> what USE flag should be used instead ? :/

Well, part of the problem is that the configure script only seems to provide an on/off flag:

  --disable-simd          Disable SIMD code. (default=no)