diff options
Diffstat (limited to 'include/getopt.h')
| -rw-r--r-- | include/getopt.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/getopt.h b/include/getopt.h index fb30719..9620fc7 100644 --- a/include/getopt.h +++ b/include/getopt.h @@ -99,13 +99,20 @@ struct option #define optional_argument 2 #if defined (__STDC__) && __STDC__ -#ifdef __GNU_LIBRARY__ +/* HAVE_DECL_* is a three-state macro: undefined, 0 or 1. If it is + undefined, we haven't run the autoconf check so provide the + declaration without arguments. If it is 0, we checked and failed + to find the declaration so provide a fully prototyped one. If it + is 1, we found it so don't provide any declaration at all. */ +#if defined (__GNU_LIBRARY__) || (defined (HAVE_DECL_GETOPT) && !HAVE_DECL_GETOPT) /* Many other libraries have conflicting prototypes for getopt, with differences in the consts, in stdlib.h. To avoid compilation errors, only prototype getopt for the GNU C library. */ extern int getopt (int argc, char *const *argv, const char *shortopts); #else /* not __GNU_LIBRARY__ */ +# if !defined (HAVE_DECL_GETOPT) extern int getopt (); +# endif #endif /* __GNU_LIBRARY__ */ extern int getopt_long (int argc, char *const *argv, const char *shortopts, const struct option *longopts, int *longind); |