Problem with M4

[Nir Idisis]

hi,
I was wondering maybe you can help me solve my problem:

recently, I setup OpenBSD on one of my old P1 machines.

on that machine I tried to install PHP which requires bison and I got
the following messages while trying to configure bison:
 checking for m4... /usr/bin/m4
 checking whether m4 supports frozen files... no
 configure: error: GNU M4 1.4 is required

before I tried to install bison I installed the latest M4 (the
installetion was completed successfully), so that I know I do have M4
installed on my machine.

then i tried to install autoconf-2.59 (I read on a forum that running
the configure.ac
configuration file might help) and got the same message.

the path to M4 is present at the $PATH var - someone also adviced me
to check this out....

I appreciate your time,
Thanks and have a nice day...
Nir Idisis.