ports/189136: multimedia/libvpx fails to build on freebsd10/i386 with gcc

[Dmitry Afanasiev]

>Number:         189136
>Category:       ports
>Synopsis:       multimedia/libvpx fails to build on freebsd10/i386 with gcc
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Apr 30 11:50:00 UTC 2014
>Closed-Date:
>Last-Modified:
>Originator:     Dmitry Afanasiev
>Release:        10.0-STABLE
>Organization:
>Environment:
FreeBSD meow 10.0-STABLE FreeBSD 10.0-STABLE #5 r264761: Wed Apr 23 21:55:28 MSK 2014     root at meow:/usr/obj/usr/src/sys/meow  i386

>Description:
Problem described in ports/185657 also affects build on freebsd10/i386 with gcc:
cc  -O2 -pipe -march=k8-sse3 -fno-strict-aliasing -m32 -O3 -fPIC -U_FORTIFY_SOUR
CE -D_FORTIFY_SOURCE=0 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -Wall -Wdeclar
ation-after-statement -Wdisabled-optimization -Wpointer-arith -Wcast-qual -Wvla 
-Wimplicit-function-declaration -Wuninitialized -Wunused-variable -Wno-unused-fu
nction -I. -I"/var/ports/usr/ports/multimedia/libvpx/work/libvpx-1.3.0" -msse2 -
c -o vp9/common/x86/vp9_idct_intrin_sse2.c.o vp9/common/x86/vp9_idct_intrin_sse2
.c
vp9/common/x86/vp9_idct_intrin_sse2.c: In function 'vp9_idct32x32_1024_add_sse2'
:
vp9/common/x86/vp9_idct_intrin_sse2.c:3636: note: use -flax-vector-conversions t
o permit conversions between vectors with differing element types or numbers of subparts
vp9/common/x86/vp9_idct_intrin_sse2.c:3636: error: convert_for_assignment: incompatible type for argument 1 of '__builtin_ia32_psrlqi128'

Adding CFLAGS+=-flax-vector-conversions solves problem too, but I'm not known correct way to permanently add this to port.
>How-To-Repeat:

>Fix:
As workaround user can add this to make.conf:
.if ${.CURDIR:M*/ports/multimedia/libvpx}
CFLAGS+=-flax-vector-conversions
.endif


>Release-Note:
>Audit-Trail:
>Unformatted: