diff options
Diffstat (limited to 'lib/getopt.h')
| -rw-r--r-- | lib/getopt.h | 45 |
1 files changed, 31 insertions, 14 deletions
diff --git a/lib/getopt.h b/lib/getopt.h index dceb0301..b359a47b 100644 --- a/lib/getopt.h +++ b/lib/getopt.h @@ -22,6 +22,18 @@ #ifndef _GETOPT_H #define _GETOPT_H 1 +/* + * The operating system may or may not provide getopt_long(), and if + * so it may or may not be a version we are willing to use. Our + * strategy is to declare getopt here, and then provide code unless + * the supplied version is adequate. The difficult case is when a + * declaration for getopt is provided, as our declaration must match. + * + * XXX Arguably this version should be named differently, and the + * local names defined to refer to the system version when we choose + * to use the system version. + */ + #ifdef __cplusplus extern "C" { #endif @@ -99,23 +111,23 @@ struct option #define optional_argument 2 #if defined (__STDC__) && __STDC__ -#if defined (__GNU_LIBRARY__) \ - || defined (__EXTENSIONS__) \ - || defined (_GETOPT_DEFINED_) \ - || defined (_GETOPT_DECLARED) -/* Many other libraries have conflicting prototypes for getopt, with - differences in the consts, in stdlib.h. To avoid compilation - errors, only prototype getopt for systems we know have compatible - getopt. - glibc: __GNU_LIBRARY__ - solaris: __EXTENSIONS__ - OpenBSD: _GETOPT_DEFINED_ - FreeBSD: _GETOPT_DECLARED + +#if REALLY_NEED_PLAIN_GETOPT + +/* + * getopt is defined in POSIX.2. Assume that if the system defines + * getopt that it complies with POSIX.2. If not, an autoconf test + * should be written to define NONPOSIX_GETOPT_DEFINITION. */ +#ifndef NONPOSIX_GETOPT_DEFINITION extern int getopt (int argc, char *const *argv, const char *shortopts); -#else /* not __GNU_LIBRARY__ or __EXTENSIONS__ */ +#else /* NONPOSIX_GETOPT_DEFINITION */ extern int getopt (void); -#endif /* __GNU_LIBRARY__ */ +#endif /* NONPOSIX_GETOPT_DEFINITION */ + +#endif + + extern int getopt_long (int argc, char *const *argv, const char *shortopts, const struct option *longopts, int *longind); extern int getopt_long_only (int argc, char *const *argv, @@ -128,11 +140,16 @@ extern int _getopt_internal (int argc, char *const *argv, const struct option *longopts, int *longind, int long_only); #else /* not __STDC__ */ + +#ifdef REALLY_NEED_PLAIN_GETOPT extern int getopt (); +#endif /* REALLY_NEED_PLAIN_GETOPT */ + extern int getopt_long (); extern int getopt_long_only (); extern int _getopt_internal (); + #endif /* __STDC__ */ #ifdef __cplusplus |