Dear Lazyweb,
In my newest project I need to use Fortran routines and variables in C. From the source code point of view this requires only to declare the needed Fortran entities in your C code whilst taking the “right” types of the variables and the name mangling of the Fortran compiler into account.
Here is an example. Consider you have the following Fortran code:
module X real, dimension(0:1) :: v subroutine Foo(A, b, c, & & D) integer, intent(in) :: a, & & B real, intent(out) :: C, d ! <Foo's body> end subroutine end module X
To use the array v and the subroutine Foo() in C, you need to add (something like) the following declarations to your C source code:
extern float x_mp_v_[2]; void x_mp_foo_(int* a, int* b, float* c, float* d);
If only a handful of Fortran routines are needed to be called from C, declaring them by hand may be feasible. This is however error-prone and becomes impracticable for more than a handful of routines. Especially if the routine signatures change frequently.
So what I’d like to have is a tool that generates a C header file containing all declarations of Fortran entities from a given Fortran source file. Or if such tool does not exist, a tool that extracts variable declarations and routine signatures from a Fortran source file into a format that is easier to parse than Fortran itself would also be helpful. Any suggestions?
