Has anyone made cfortran.h work with gcc?

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3 total messages Started by Chris Walter Mon, 14 Dec 1992 23:17

#619

Author: Chris Walter
Date: Mon, 14 Dec 1992 23:17

24 lines
1238 bytes

Hello all,

I am a new user to C++ and am using gcc on a IBM RS6000 running AIX 3.2.
(gcc 2.3.2/ g++ 2.3)

I would like to call Fortran routines from within my C++ programs.
Has anyone managed to modify cfortran.h(a header file which allows
one to easily call fortran routines within C) to work with gcc?  I
contacted the author and he isn't aware of anyone who has done it.  I
thought this might work:

extern "C" {
#include "/users/walter/cfortran/cfortran.h"
#define RANNOR(A,B) CCALLSFSUB2(RANNOR,rannor,FLOAT,FLOAT,A,B)
}

but no luck. The linker complains it can't find 

rannor__Fp(some other stuff)

so clearly the compiler doesn't know rannor is foreign....

-Chris Walter
walter@cithe501.cithep.caltech.edu

Re: Has anyone made cfortran.h work with gcc?

#620

Author: Jason Merrill
Date: Mon, 14 Dec 1992 18:20

8 lines
740 bytes

You might try using the "asm labels" extension in your declarations, i.e.:

extern fortran_func () asm ("fortran_func");

See the gcc documentation for more information on this...

--
Jason Merrill					jason@jarthur.claremont.edu

Re: Has anyone made cfortran.h work with gcc?

#623

Author: Hamish Macdonald
Date: Tue, 15 Dec 1992 14:50

29 lines
1745 bytes

>>>>> On 14 Dec 1992 23:17:18 GMT,
>>>>> In message <1gj4luINNp7g@gap.caltech.edu>,
>>>>> walter@cithe501.cithep.caltech.edu (Chris Walter) wrote:

Chris> I would like to call Fortran routines from within my C++
Chris> programs.  Has anyone managed to modify cfortran.h(a header
Chris> file which allows one to easily call fortran routines within C)
Chris> to work with gcc?  I contacted the author and he isn't aware of
Chris> anyone who has done it.  I thought this might work:

Chris> extern "C" {
Chris> #include "/users/walter/cfortran/cfortran.h"
Chris> #define RANNOR(A,B) CCALLSFSUB2(RANNOR,rannor,FLOAT,FLOAT,A,B)
Chris> }

Chris> but no luck. The linker complains it can't find 

Chris> rannor__Fp(some other stuff)

Chris> so clearly the compiler doesn't know rannor is foreign....

It looks like there is no prototype for "rannor" in "cfortran.h", so
C++ is assuming "C++" linkage the first time it sees a reference to
"rannor".

For C++ to know that "rannor" has "C" linkage, a prototype for it
*must* exist in "cfortran.h".

Try adding a prototype to "cfortran.h" and see if that helps.

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