Thanks for that suggestion. Unfortunatley, it did not fix it.
This is a fresh install of NetBSD 6.1. When I compile/install www/apache24 it installs "libtool-base-2.2.6bnb8" as a dependency.
As you suggested, I removed libtool-base and did the build again. I then attempted www/apache24 again. It failed in the same place.
Here is more information that might help.
Many thanks for any help to fix this.
----
=> Bootstrap dependency digest>=20010302: found digest-20121220
WARNING: No /var/db/pkg/pkg-vulnerabilities file found.
WARNING: To fix run: `/usr/sbin/pkg_admin -K /var/db/pkg fetch-pkg-vulnerabilities'.
===> Skipping vulnerability checks.
===> Installing for apache-2.4.4
Installing configuration files
Making install in srclib
Making install in os
Making install in unix
Making install in server
Making install in mpm
Making install in prefork
/bin/sh /usr/pkgsrc/www/apache24/work/httpd-2.4.4/build/libtool --silent --mode=install install
mod_mpm_prefork.la /usr/pkgsrc/www/apache24/work/.destdir/usr/pkg/lib/httpd/
/bin/sh /usr/pkgsrc/www/apache24/work/httpd-2.4.4/build/libtool --silent --mode=install install
mod_mpm_prefork.la /usr/pkgsrc/www/apache24/work/.destdir/usr/pkg/lib/httpd/
sh: Cannot fork
make: don't know how to make local-. Stop
/bin/sh /usr/pkgsrc/www/apache24/work/httpd-2.4.4/build/libtool --silent --mode=install install
mod_mpm_prefork.la /usr/pkgsrc/www/apache24/work/.destdir/usr/pkg/lib/httpd/
make: stopped in /usr/pkgsrc/www/apache24/work/httpd-2.4.4/server/mpm/prefork
*** Error code 1
Stop.
make: stopped in /usr/pkgsrc/www/apache24/work/httpd-2.4.4/server/mpm/prefork
*** Error code 1
Stop.
make: stopped in /usr/pkgsrc/www/apache24/work/httpd-2.4.4/server/mpm/prefork
*** Error code 1
Stop.
make: stopped in /usr/pkgsrc/www/apache24/work/httpd-2.4.4/server/mpm/prefork
*** Error code 1