Hello,
  I am trying to call a perl function that will use DBI from c++.   This is what I have included for that (in c++) as suggested by perl documentation: 
#ifdef cplusplus
#define EXTERN_C extern "C"
#else
#define EXTERN_C extern
#endif
extern "C"
{
# include "EXTERN.h"   // from the Perl distribution
# include "perl.h"
}

EXTERN_C
{
  void boot_DynaLoader _((CV* cv));
  void boot_DBI _((CV* cv));
  void boot_DBD__mysql _((CV* cv));
}
  

static void
xs_init(){
    newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, __FILE__);
    newXS("DBI::bootstrap", boot_DBI, __FILE__);
    newXS("DBD::mysql::bootstrap", boot_DBD__mysql, __FILE__);
}

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but when I compile the c++ like this: 
g++ -g -o dbChg dbWrapper.cc -Wno-deprecated `perl -MExtUtils::Embed -
+e ccopts -e ldopts`

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I got errors as the following: 
/tmp/cccNMAhR.o: In function `void __iter_swap<char *, char *, char>(c
+har *, char *, char *)':
/usr/include/g++-3/stl_iterator.h(.text+0x29): undefined reference to 
+`boot_DBI' 
/usr/include/g++-3/stl_iterator.h(.text+0x43): undefined reference to 
+`boot_DBD__mysql'
collect2: ld returned 1 exit status

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It is gcc 2.96 with perl 5.6.1 under linux redhat.   Could you please give me some hint to make it work? Thank you so much.
  christine

janitored by ybiC: <code> tags around code block as per Monastery convention, fix minor format faux paus

In reply to question about loading dbi when calling perl from c++ by christine

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