(1) Create a text file listing the Fortran sources needed to build a
program, one per line, with files containing modules preceding those
that use the modules. For example, it could look like

foo.f90
xfoo.f90

(2) Create a make file that looks as follows. I have a Python program
that does this. With minor modifications it will work with other
compilers -- the opt variable will be different, and most commercial
compilers name object files with the .obj rather than .o extension.

exec = mat_g95mak.exe
obj  =  foo.o xfoo.o
opt  = -Wall -Wextra -ftrace=full -fbounds-check -freal=nan

all: clean run

.f90.o:
  g95 -c $(opt) $*.f90

$(exec): $(obj)
  g95 -o $(exec) $(opt) $**

compile: $(exec)
   echo $(exec) created

run: $(exec)
   $(exec)

clean:
   if exist $(exec) del $(exec)

This does NOT check for module dependencies, unfortunately.

(3) To compile and run the program, issue the command

nmake /nologo /f make_foo.txt

where make_foo.txt is the file created in the previous step.

To compile but not run, replace

all: clean run

with