Re: autoconfiscating getopt_long()...

[Akim Demaille]

>>>>> "Paul" == Paul Eggert <address@hidden> writes:

>> From: Matthew Whitworth <address@hidden> Date: Tue, 5 Dec
>> 2000 14:45:19 -0800 (PST)

>> I have examined several packages that use getopt_long(), including
>> several GNU packages, and none of them autoconfiscate this function
>> the same way.  Actually, few of them even autoconfiscate it at all
>> -- most simply compile and link it unconditionally

Paul> I suspect that's just tradition dating back to when getopt_long
Paul> was invariably absent from the C library.

Well, maybe, but today that's the recommended way to do it since the
files themselves take care of being `empty' when getopt is already
installed.

/* Comment out all this code if we are using the GNU C Library, and are not
   actually compiling the library itself.  This code is part of the GNU C
   Library, but also included in many other GNU distributions.  Compiling
   and linking in this code is a waste when using the GNU C library
   (especially if it is a shared library).  Rather than having every GNU
   program understand `configure --with-gnu-libc' and omit the object files,
   it is simpler to just do this in the source for each such file.  */

#define GETOPT_INTERFACE_VERSION 2
#if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
# include <gnu-versions.h>
# if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
#  define ELIDE_CODE
# endif
#endif

#ifndef ELIDE_CODE

/* THE IMPLEMENTATION OF GETOPT. */

#endif  /* Not ELIDE_CODE.  */