Re: GNU make or portable make? (was: Makefile to Makefile.am)

[Robert J. Hansen]

> I for one would be glad if automake required GNU make, since it
> could make use of a lot of useful features which currently aren't
> allowed.  Similar to autoconf not requiring a POSIX shell, depite
> the fact that non-POSIX shells are so far obsolete they are
> irrelevant.

Are there any tools to spot GNUisms in Makefiles?  If not, it seems like this 
would be a useful thing to develop.