Re: [bug-gnulib] include in a C++ program

[Lorenzo Bettini]

Bruno Haible wrote:
> Lorenzo Bettini wrote:
>> I've just started using gnulib, and I have a doubt.
>> I've imported strdup and I'm using it in a C++ program.
>>
>> Now should I import strdup.h in the C++ program simply like this
>>
>> #include "strdup.h"
>>
>> Or should I wrap it as follows?
>>
>> extern "C" {
>> #include "strdup.h"
>> }
> 
> Just do an
> 
>    #include "strdup.h"
> 
> and report it to us if it leads to link errors. We are willing to put
> extern "C" markers in gnulib's header files, since it's only a small effort
> to do so.
> 

I tried it and got no problem, but as far as I understand this is not a
proof, since

#if defined HAVE_DECL_STRDUP && !HAVE_DECL_STRDUP && !defined strdup
/* Duplicate S, returning an identical malloc'd string.  */
extern char *strdup (const char *s);
#endif

so the extern definition is not parsed, since it finds the definition of
strdup in string.h (included in strdup.h).

However, I tried this test program:

#include <iostream>

extern char *strdup (const char *s);

int main()
{
  char *copy = strdup("foobar");
  std::cout << copy << std::endl;

  return 0;
}

and got no problem; this should guarantee that the extern "C" is not
required?

thanks in advance
        Lorenzo

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| Lorenzo Bettini          ICQ# lbetto, 16080134      |
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