.C() and C++ name mangling - R-help

Wed, Oct 2, 2002 10:06 AM #

Howdy,

        I'm working with some external code written in C++, which I
        would like to call via dyn.load() and .C() from R.  The
        function prototype looks like:

        gaRemin(int *, float *, float *, int *, float *, float *, 
                float *, float *, float *)

        but to call this function from R using .C() I have had to use
        the mangled version of this function name,

        gaRemin__FPiPfT1T0T1N41

        Is using the mangled name my best option, or is there some way
        that R knows to interpret unmangled function names from C++
        shared library objects?

        I'm concerned about portability of the resultant code in the
        case that name-mangling is handled differently from platform
        to platform.

        This is Linux, Redhat 7.2 with g++-2.96.

        Thanks for any help you can offer,

                Andy

Andy Jacobson

arj at gfdl.gov

Program in Atmospheric and Oceanic Sciences
Sayre Hall, Forrestal Campus
Princeton University
PO Box CN710 Princeton, NJ 08544-0710 USA

Tel: 609/258-5260  Fax: 609/258-2850
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Peter Dimitrov

Wed, Oct 2, 2002 12:11 PM #

Enclose the interface function, in your case gaRemin with extern "C"
statement like this:

extern "C"
{

	gaRemin(int *, float *, float *, int *, float *, float *, 
		float *, float *, float *) {
		...
	}

}

Also, look at the "Writing R Extensions" manual in R help, specifically
the chapter "System and foreign language interfaces", section
"Interfacing C++ code", for more information.

peter

On Wed, 2002-10-02 at 10:06, Andy Jacobson wrote:

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Douglas Bates

Wed, Oct 2, 2002 2:41 PM #

Andy Jacobson <andyj at splash.princeton.edu> writes:

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