RE: Unable to install M4 1.4.17 using PGI 15.10 compilers

[Stewart, Adam James]

I think I figured out the problem. When I run `make -d`, I see problems like:

Prerequisite `m4/extern-inline.m4' is newer than target `aclocal.m4'.
Must remake target `aclocal.m4'.

Apparently it doesn't like the fact that I modified extern-inline.m4 more 
recently than aclocal.m4. I have never run into this problem before. I wonder 
if I can add a line to the patch to trick it into updating aclocal.m4. I would 
be fine with doing it manually, but I am working on a build system (kind of 
like Homebrew) that does everything behind the scenes.