pkg/53231: can't build xen on -current

[martin%NetBSD.org@localhost]

>Number:         53231
>Category:       pkg
>Synopsis:       can't build xen on -current
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Apr 29 11:20:00 +0000 2018
>Originator:     Martin Husemann
>Release:        NetBSD 8.99.14
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD seven-days-to-the-wolves.aprisoft.de 8.99.14 NetBSD 8.99.14 (GENERIC) #213: Sat Apr 28 09:26:35 CEST 2018 martin%seven-days-to-the-wolves.aprisoft.de@localhost:/work/src/sys/arch/amd64/compile/GENERIC amd64
Architecture: x86_64
Machine: amd64
>Description:

Xen enforces the build of gcc 4.8, which can't be build with gcc 6 in 
-current:

In file included from ../../gcc-4.8.5/gcc/cp/except.c:1008:0:
cfns.gperf: In function 'const char* libc_name_p(const char*, unsigned int)':
cfns.gperf:101:1: error: 'const char* libc_name_p(const char*, unsigned int)' redeclared inline with 'gnu_inline' attribute
cfns.gperf:26:14: note: 'const char* libc_name_p(const char*, unsigned int)' previously declared here
[..]
Makefile:1059: recipe for target 'cp/except.o' failed
gmake[3]: *** [cp/except.o] Error 1
gmake[3]: *** Waiting for unfinished jobs....
rm gcc.pod
gmake[3]: Leaving directory '/work/pkgobj/lang/gcc48/work/build/gcc'


>How-To-Repeat:
s/a

>Fix:
n/a