makefile “no rule to make a target” error

Question

I have been looking at this problem for a while and still don\'t know what is wrong.

My makefile looks like:

    F90    = pgf90
NETCDF_DIR = /opt/netcdf
         


        

Answer 1

Make doesn't know that .f90 is a suffix, so your suffix rule is not valid. It's not enough to just declare a suffix rule if make doesn't know about the suffix. If you want to use suffix rules, you also have to add the new suffix with the .SUFFIXES pseudo-target, like this:

.SUFFIXES: .f90

Or you can use pattern rules, which don't require this (but are GNU make-specific):

%.o : %.f90
        ${F90} -c ${INCLUDE_MODULES} $<