devel/autoconf fails on netbsd-7

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

Hello,
devel/autoconf fails to build on netbsd-7:
ftp://asim.lip6.fr/outgoing/packages/amd64/7.0/2015Q1/20150506.1506/autoconf-2.69nb5/build.log

Making all in man
--- ./config.guess.1 ---
--- ./config.sub.1 ---
--- ./config.guess.1 ---
Updating man page ./config.guess.1
--- ./config.sub.1 ---
Updating man page ./config.sub.1
--- ./config.guess.1 ---
PATH="../tests:../build-aux:$PATH";  export PATH;  /bin/sh /usr/tmp/devel/autoconf/work/autoconf-2.69/build-aux/missing --run help2man  --include=config.guess.x  --include=./common.x  --source='GNU Autoconf 2.69'  --output=./config.guess.1.t `echo 'config.guess' | sed 's,.*/,,'`
--- ./config.sub.1 ---
PATH="../tests:../build-aux:$PATH";  export PATH;  /bin/sh /usr/tmp/devel/autoconf/work/autoconf-2.69/build-aux/missing --run help2man  --include=config.sub.x  --include=./common.x  --source='GNU Autoconf 2.69'  --output=./config.sub.1.t `echo 'config.sub' | sed 's,.*/,,'`
help2man: can't get `--help' info from config.sub
Try `--no-discard-stderr' if option outputs to stderr
--- ./config.guess.1 ---
help2man: can't get `--help' info from config.guess
Try `--no-discard-stderr' if option outputs to stderr
--- ./config.sub.1 ---
*** [./config.sub.1] Error code 1

make[2]: stopped in /usr/tmp/devel/autoconf/work/autoconf-2.69/man
--- ./config.guess.1 ---
*** [./config.guess.1] Error code 1

make[2]: stopped in /usr/tmp/devel/autoconf/work/autoconf-2.69/man
2 errors


did anyone else see this ? Any idea how to fix ?

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--