(Question) JNI and Fortran

dr_funkenstein

Hey

Not sure if this is the right forum, but I've a question about the Java Native Interface.

I'm trying to put a java interface on top of a fortran program. Doing some research, I've read that people can do by using the JNI and c code (as the intermediate).

I've compiled the java code.. fortran code.. and c code.. but when I try to link them all together (on OS X), I get the following:

gcc -dynamiclib -o libmycodeinc.jnilib CCode.o FortranCode.o
Undefined symbols:
"__gfortran_st_write", referenced from:
_sumsquaredf_ in FortranCode.o
_sumsquaredf_ in FortranCode.o
_sumsquaredf_ in FortranCode.o
_sumsquaredf_ in FortranCode.o
_sumsquaredf_ in FortranCode.o
"__gfortran_transfer_integer", referenced from:
_sumsquaredf_ in FortranCode.o
_sumsquaredf_ in FortranCode.o
_sumsquaredf_ in FortranCode.o
_sumsquaredf_ in FortranCode.o
_sumsquaredf_ in FortranCode.o
"__gfortran_st_write_done", referenced from:
_sumsquaredf_ in FortranCode.o
_sumsquaredf_ in FortranCode.o
_sumsquaredf_ in FortranCode.o
_sumsquaredf_ in FortranCode.o
_sumsquaredf_ in FortranCode.o
ld: symbol(s) not found
collect2: ld returned 1 exit status

If anyone has done this before, I can forward on the code to see if its something small I'm doing wrong.

The above worked with a different example program, just Java to C. I'm a bit lost here So any help would be appreciated!

Thanks