toolchain/51620: bsd.own.mk useless with MKDTRACE=no MKCTF=no

[martin%NetBSD.org@localhost]

>Number:         51620
>Category:       toolchain
>Synopsis:       bsd.own.mk useless with MKDTRACE=no MKCTF=no
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    toolchain-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Nov 10 19:00:00 +0000 2016
>Originator:     Martin Husemann
>Release:        NetBSD 7.99.42
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD night-owl.duskware.de 7.99.42 NetBSD 7.99.42 (NIGHT-OWL) #438: Wed Nov 9 10:50:00 CET 2016 martin%night-owl.duskware.de@localhost:/usr/src/sys/arch/amd64/compile/NIGHT-OWL amd64
Architecture: x86_64
Machine: amd64
>Description:

Using bsd.*.mk outside of the source tree is not possible on systems
that use MKCTF=no, see the "cwrappers now enabled by default on some platforms"
thread on tech-pkg.

Despite having MKCTF=no and MKDTRACE=no in /etc/mk.conf, bsd.own.mk
sets CTFCONVERT and uses it for linking, which then fails due to the
missing binary.

>How-To-Repeat:

Remove ctfconvert and ctfmerge from your build system. Add

MKCTF=no
MKDTRACE=no

to /etc/mk.conf

cd /usr/pkgsrc/pkgtools/cwrappers
make

>Fix:
n/a