如何在C程序中使用Fortran共享库？

Question

I have put several subroutines into .f95 file, compiled it with gfortran -shared -fPIC -o bin/Debug/libpr10.so main.f95 , now I want to use some of subroutines from that library in my C program. How do I do that (syntactically)? Do I have to produce any "headers" in Fortran library where I should declare the subroutines I want to use outside of the library (as I would have to if it was C)? If I just tell the linker where the library is and try to call any subroutines in main() i get an error

UPDATE I don't want to mix fortran and C! I just want to use one subroutine from Fortran shared library, even w/o arguments. Despite that I have pointed out a path to the .so library, it's "invisible" for C program! The question is how to tell C program that there actually IS a subroutine that I want to invoke.

If I'm violently mistaken with "mixing" idea, correct me.

Answer 1

Ok, I don't think that this solution is universal but for Microsoft Visual Studio it should be __stdcall before subroutne name, and for gcc it should be a _ symbol after subroutine name eg we want to call subroutine called menu, so we put menu_(); into main function.