--- Hans Horn <[EMAIL PROTECTED]> wrote: > Hi everybody, > > 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 > one here? >
As you say, extern "FORTRAN" doesn't work. It should be extern "C". Note that g77 uses C calling convention (__cdecl) by default for Fortran. Other compilers use PASCAL (__stdcall) 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 > linker???? > By default, g77 appends an underscore to Fortan names, so you will need to do same in your C/C++ code. If you can rebuild the libs, you may add -fno-underscore option to override this decoration. Have a look at either the netlib Lapack++ package (C++ wrappers for Fortran blas and lapack) or Roldan Pozo's TNT package (a start a templated version of Lapack++) here: http://math.nist.gov/tnt/index.html Danny > Any light shed onto the subject is severely appreciated! > Hans > > > -- > Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple > Bug reporting: http://cygwin.com/bugs.html > Documentation: http://cygwin.com/docs.html > FAQ: http://cygwin.com/faq/ > http://shopping.yahoo.com.au - Yahoo! Shopping - Free CDs for thousands of Priority Shoppers! -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
