elseif construct

[Chad Loder]

Hello. GNU make doesn't seem to have an elseif construct.
Is there any syntactic sugar that lets you test a series
of exclusive conditions without having many nested levels
of if/else/if/endif/endif ?

e.g., the nesting structure below is undesirable, especially
with lots of potential platforms:

ifdef WIN32
 OSMAKEFILE:=$(MAKE_ROOT)/win32.mk
else
 ifdef LINUX
  OSMAKEFILE:=$(MAKE_ROOT)/linux.mk
 endif
endif


Thanks,
        Chad Loder