pkg/50210: Compilation of gcc 4.9 and 5.2 hangs on NetBSD 6.1_STABLE

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>Number:         50210
>Category:       pkg
>Synopsis:       Compilation of gcc 4.9 and 5.2 hangs on NetBSD 6.1_STABLE
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Sep 04 21:45:00 +0000 2015
>Originator:     Benjamin Lorenz
>Release:        NetBSD 6.1_STABLE
>Organization:
	
>Environment:
	
	
System: NetBSD prod.qwabbl.com 6.1_STABLE NetBSD 6.1_STABLE (PROD) #2: Sun Jan 18 09:15:00 CET 2015 bjjl%prod.qwabbl.com@localhost:/usr/obj/sys/arch/i386/compile/PROD i386
Architecture: i386
Machine: i386
>Description:
Compilation of pkgsrc/lang/gcc49 and gcc5 hangs at this stage:

/usr/pkg/src/lang/gcc5/work/build/./gcc/xgcc -shared-libgcc -B/usr/pkg/src/lang/gcc5/work/build/./gcc -nostdinc++ -L/usr/pkg/src/lang/gcc5/work/build/i486--netbsdelf/libstdc++-v3/src -L/usr/pkg/src/lang/gcc5/work/build/i486--netbsdelf/libstdc++-v3/src/.libs -L/usr/pkg/src/lang/gcc5/work/build/i486--netbsdelf/libstdc++-v3/libsupc++/.libs -B/usr/pkg/gcc5/i486--netbsdelf/bin/ -B/usr/pkg/gcc5/i486--netbsdelf/lib/ -isystem /usr/pkg/gcc5/i486--netbsdelf/include -isystem /usr/pkg/gcc5/i486--netbsdelf/sys-include    -x c++-header -nostdinc++ -g -O2 -I/usr/include -I/usr/pkg/include  -I/usr/pkg/src/lang/gcc5/work/build/i486--netbsdelf/libstdc++-v3/include/i486--netbsdelf -I/usr/pkg/src/lang/gcc5/work/build/i486--netbsdelf/libstdc++-v3/include -I/usr/pkg/src/lang/gcc5/work/gcc-5.2.0/libstdc++-v3/libsupc++ -O2 -g -std=gnu++0x /usr/pkg/src/lang/gcc5/work/gcc-5.2.0/libstdc++-v3/include/precompiled/stdc++.h \
-o i486--netbsdelf/bits/stdc++.h.gch/O2ggnu++0x.gch

>From top command:

14713 bjjl      26    0   178M  159M CPU/1     48:42 99.02% 99.02% cc1plus

>How-To-Repeat:
	
>Fix:
	

>Unformatted: