RE: [Dev-C++] Mixed Language Programming w/Dev-Cpp

Thanks to everyone who responded to my question about mixed language
programming (particularly to Horst for the references).  Persistence has
paid off!  For the record . .

Turns out Dev-Cpp works quite nicely with mixing Fortran and C.  At compile,
gcc implicitly invokes g77 for any Fortran source files and the resulting
object files are linked without a problem; So including Fortran source files
in a Dev-Cpp project appears to be seamless.

Actually using the Fortran subroutines takes a little more work.  First, the
Mingw libraries libg2c and libm must be linked, i.e., Project Options :
Linker Options : -lg2c -lm (in that order!).  Next, the Mingw header file
g2c.h must be included in any C source file that will call C.

libg2c and g2c.h are gcc's versions of f2c.  However, as near as I can tell,
this isn't an f2c operation (translating Fortran to C then compiling from C
source), rather, the Fortran source files are compiled with g77 and so
retain the native efficiencies of their Fortran implementation; the library
and header files merely provide the interface for C.

Prototyping the Fortran subroutines is a little tricky but I found a use for
f2c after all!  When used with the -P switch, it produces a file with
subroutine prototypes to be used in C.

After that, it took some trial & error to figure out how to correctly
declare & pass the variables from C.  Biggest problem I had was with the C
function passed to and called from the Fortran routines (using their own
internally declared variables).  Essentially I had to create a shell of the
C routine to be called by the Fortran routines where I adjusted array
indexing and then call the real C routine.

Hope that is helpful anyone else interested in the issue.  Thanks again for
the feedback.

Scott