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linking C++ code against library from fortran sources
- From: "Hans Horn" <hannes at 2horns dot com>
- To: <cygwin at cygwin dot com>
- Date: Sat, 8 Dec 2001 17:18:16 -0800
- Subject: linking C++ code against library from fortran sources
I have a bunch of old numerical fortran77 sources, which I compiled with g77
and archived into, say libMyF77.a.
I want those f77 functions to be called from w/i a c++ program.
Here are my two questions:
1. to satisfy the compiler, I have to declare the functions used as
'extern'. Which language string should I be using?
"FORTRAN" as language string (as I had used on other platforms, such as AIX)
is not recognized by gcc/g++
gcc/g++ accepts only either "C" or nothing (or ????). Which is the right
2. the linker complains about the functions used as undefined references. I
think I've told the linker properly, where to look for archives (-L<path to
libMyF77.a> -lMyF77). What am I doing wrong? Do I have to do something
special when archiving? Do I have to raise another magic flag for the
Any light shed onto the subject is severely appreciated!
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