Bug 546074

Summary:	media-sound/jack-audio-connection-kit-0.124.1 should never pass --enable-sse to configure
Product:	Gentoo Linux	Reporter:	Karl Lindén <karl.j.linden>
Component:	Current packages	Assignee:	Professional Audio Applications Maintainers <proaudio>
Status:	RESOLVED WORKSFORME
Severity:	normal
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Karl Lindén 2015-04-09 16:11:17 UTC

According to [1] ebuilds should not have use flags for build system options that do not pull in conditional assembly code. The --enable-sse option to configure only adds "-msse -mfpmath=sse" to CFLAGS. Take a look at configure.ac (search for sse) to verify this. Thus $(use_enable cpu_flags_x86_sse sse) should be replaced with --disable-sse.

[1] https://wiki.gentoo.org/wiki/CPU_FLAGS_X86_conversion (point 6)

Reproducible: Always

Comment 1 Alexis Ballier gentoo-dev

2015-06-08 09:45:44 UTC

well, -mfpmath=sse must not be used at global scope since it breaks standards; however, some packages do not rely on standard-compliant floating point computations and can add this; but this obviously adds sse instructions so they should add this only with sse (or its use-expanded equivalent) useflag enabled

this is clearly something that should be fixed in the documentation