2005-08-10 Greg Troxel <gdt@fnord.ir.bbn.com>

        * getopt.h: Don't declare getopt (rather than getopt_long), since
        quagga doesn't need it.
        * getopt.c (getopt): Don't define getopt.


Fixes build breakage on NetBSD, and seems likely to work on most
platforms since it avoids the entire issue of system getopt
declarations and whether they conform to POSIX.2.  Note that this
change doesn't address system getopt_long declarations, but also
doesn't change anything about getopt_long.

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