pkg/43793: build failure ('pc' undeclared; 'sigmask' undeclared) NetBSD 5.1 / sparc64

[tmp+nb-spr%disfinite.org@localhost]

>Number:         43793
>Category:       pkg
>Synopsis:       Build fails in cpu-exec.c with both 'pc' and 'sigmask' 
>undeclared
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Aug 22 17:00:00 +0000 2010
>Originator:     T. M. Pederson
>Release:        NetBSD 5.1_RC3
>Organization:
>Environment:
System: NetBSD echo.disfinite.org 5.1_RC3 NetBSD 5.1_RC3 (ECHO) #13: Mon Aug 2 
15:14:19 CDT 2010 tmp@:/usr/obj/sys/arch/sparc64/compile/ECHO sparc64
Architecture: sparc64
Machine: sparc64
>Description:
        When building qemu on NetBSD 5.1 / sparc64, the build fails with:
        CC    i386-bsd-user/cpu-exec.o
        /usr/obj/pkg/emulators/qemu/work/qemu-0.12.4/cpu-exec.c: In function 
'cpu_x86_signal_handler':
        /usr/obj/pkg/emulators/qemu/work/qemu-0.12.4/cpu-exec.c:1042: error: 
'pc' undeclared (first use in this function)
        /usr/obj/pkg/emulators/qemu/work/qemu-0.12.4/cpu-exec.c:1042: error: 
(Each undeclared identifier is reported only once
        /usr/obj/pkg/emulators/qemu/work/qemu-0.12.4/cpu-exec.c:1042: error: 
for each function it appears in.)
        /usr/obj/pkg/emulators/qemu/work/qemu-0.12.4/cpu-exec.c:1069: error: 
'sigmask' undeclared (first use in this function)
        gmake[1]: *** [cpu-exec.o] Error 1
>How-To-Repeat:
        Build qemu on NetBSD 5.1 (non-i386?)
>Fix:
        None known