pkg/51140: MesaLib-11.2.1 doesn't support GLSL software with modular X11.

[stackfield0trpg%gmail.com@localhost]

>Number:         51140
>Category:       pkg
>Synopsis:       MesaLib-11.2.1 doesn't support GLSL software with modular X11.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun May 15 13:50:00 +0000 2016
>Originator:     stackfield
>Release:        NetBSD-7 stable
>Organization:
>Environment:
NetBSD rainsbase 7.0_STABLE NetBSD 7.0_STABLE (GENERIC) #0: Thu May 12 09:03:35 JST 2016  root@rainsbase:/usr/obj/sys/arch/i386/compile/GENERIC i386
>Description:
MesaLib/11.2.1 with X11_TYPE=modular set in mk.conf isn't able to run brick contains graphic/mesademo.
This problem, i see, cause on Radeon R600 hardware because Asm code in glapi in mesalib can't handle well in netbsd envelopment.
>How-To-Repeat:
1. build and install modular-xorg-server and modular-xorg-apps after X11_TYPE=modular set on mk.conf
2. Run brick in MesaDemo
>Fix:
This problem seems partially corrected on xsrc/external/mit/MesaLib/dist/src/mapi/entry.c (refer to http://cvsweb.netbsd.org/bsdweb.cgi/xsrc/external/mit/MesaLib/dist/src/mapi/entry.c.diff?r1=1.1&r2=1.2&only_with_tag=MAIN&f=h).
Its code work on my system.