I'm fairly experienced when it comes to creating XS interface to perl libraries, but this issue has confounded me for the past few days. I want to take advantage of the "INTERFACE:" directive in one of my XS files, but for some reason the generated C will not compile. I made a test module with only the barest of essentials as a sanity check, and I still couldn't get the thing to make. I'm not sure what I'm doing wrong; everything looks like it should according to the perlxs manual.

Any information on this is much appreciated :-) Below is the code int my Test.xs file

#include "EXTERN.h" 
#include "perl.h" 
#include "XSUB.h" 
 
 
int add_one(int i) { 
    return i + 1; 
} 
 
int add_two(int i) { 
   return i + 1; 
} 
 
MODULE = Test           PACKAGE = Test           
 
int 
add_interface(i) 
    int i 
    INTERFACE: 
        add_one 
        add_two

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the following is the error I get from cc during my make

cc -c  -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -xO3 -xdepend    -DV
+ERSION=\"0.01\"  -DXS_VERSION=\"0.01\" -KPIC -I/usr/perl5/5.6.1/lib/s
+un4-solaris-64int/CORE  Test.c
"Test.c", line 34: syntax error before or at: cv
"Test.c", line 45: type specifier can not be used as array size expres
+sion qualifier
"Test.c", line 45: warning: no explicit type given
"Test.c", line 46: cannot recover from previous errors
cc: acomp failed for Test.c
*** Error code 2
make: Fatal error: Command failed for target `Test.o'

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And finally here is the section of the generated C file it refers to

XS(XS_Test_add_interface) 
{ 
    dXSARGS; 
    dXSFUNCTION(int); 
    if (items != 1) 
        Perl_croak(aTHX_ "Usage: Test::add_interface(i)"); 
    { 
        int     i = (int)SvIV(ST(0)); 
        int     RETVAL; 
        dXSTARG; 
        XSFUNCTION = XSINTERFACE_FUNC(int,cv,XSANY.any_dptr); 
 
        RETVAL = XSFUNCTION(i); 
        XSprePUSH; PUSHi((IV)RETVAL); 
    } 
    XSRETURN(1); 
}

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In reply to perlxs INTERFACE problem by Fiftyvolts

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