Creating A .dll With Gfortran

[John Robinson]

Hello,

I am trying to figure out how to compile a .dll that can be read by
MSVB.  I have written my .def file, which references my Main.for file,
which contains the subroutine GGGmain, which is the one that I wish to
be accessible through the .dll file.  My .def file looks like:
EXPORTS
       gggmain

Then I attempt to compile the file with a makefile that looks like:

objects = Main.o In.o Io.o Ngg1.o Ngg2.o Ngg3.o\
      Notice.o

GGGE: GGE.o
    gfortran -mdll -o junk.tmp -Wl,--base-file,base.tmp main.o
    del junk.tmp
    dlltool --dllname GGGE.dll --base-file base.tmp --output-exp
temp.exp --def gggdll.def
    del base.tmp
    gfortran -shared -mrtd -mdll -o GGGE.dll Main.o -Wl,temp.exp
    del temp.exp

GGE.o: $(objects)
    gfortran -o GGE.o $(objects)

Main.o : Main.for
    gfortran -c Main.for
In.o : In.for
    gfortran -c In.for
Io.o : Io.for
    gfortran -c Io.for
Ngg1.o : Ngg1.for
    gfortran -c Ngg1.for
Ngg2.o : Ngg2.for
    gfortran -c Ngg2.for
Ngg3.o : Ngg3.for
    gfortran -c Ngg3.for
Notice.o : Notice.for
    gfortran -c Notice.for
clean :
    del MMME $(objects)


When I attempt to run the makefile I get the error:
undefined reference to  '_notice_'
undefined reference to  '_notice_'
undefined reference to  '_input_'
undefined reference to  '_initial_'
etc.

All of the names in the '_program_' line are subprograms from my other
object files other than Main.for.

I also tried using GGE.o in place of main.o in the dll compiling
section, but to no avail.  This gave me errors telling me that I had
multiple definitions of '_atexit', '_onexit' etc.

Is there any documentation that you could refer me to, or a direct
answer that you could help me with?

Kind Regards,
John M. Robinson

716.907.4533
jr226@buffalo.edu