Finding the name of the makefile

[Vernon E. Peets]

I am currently in the middle of a transition from platform specific make to 
GNUmake.  The project is still under development by other team members so I 
am unable to drop the current makefiles entirely.

I have created "GNUmakefile"s knowing that these will be "found" during 
execution prior to the existing "Makefile"s but I have run into a small 
problem during the generation of dependencies.

        depend:
                makedepend $(flags) $(wildcard *.c)

Standard behavior appends the dependencies to "Makefile" or "makefile" 
whichever if found first.  Adding "-f GNUmakefile" to the command will 
require that each of these files be modified later when the GNUmakefiles 
are renamed to Makefile to complete the trasition.

Question:  Is there a variable that contains the name of the makefile being 
executed?

        depend:
                makedepend -f $(<variable>) $(wildcard *.c)

Thanks,
Vern.