Do not use GNU make (gmake) to compile IPFilter

["Muggeridge, Matt" <Matt.Muggeridge@hp.com>]

Hi,

In my development environment I only have gmake available and it returns
the following error:

bash$ make osf
Makefile:274: target `irix' given more than once in the same rule.
Do not use GNU make (gmake) to compile IPFilter
make: *** [null] Error 1


Just how much pain am I in for if I start modifying makefiles to work
with gmake?  Are there other issues beyond modifying makefiles?

Thanks for any clues.

Regards,
Matt.