Put the bits in configure.in for checking for a proper thread lib.

Added the missings HAVE_CONFIG_H for certain files.
message_uidl --> message_uid
define _XOPEN_SOURCE 500 for GNU/Linux to get the namespace of UNIX98

 /* GNU mailutils - a suite of utilities for electronic mail
-   Copyright (C) 1999 Free Software Foundation, Inc.
+   Copyright (C) 1999, 2000 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -18,4 +18,4 @@
 /* Define if using libpam */
 #undef USE_LIBPAM
 #undef HAVE_SNPRINTF
-
+#undef WITH_PTHREAD

@@ -26,10 +26,6 @@ AC_ARG_ENABLE(pthread,
   *)   AC_MSG_ERROR(bad value ${enableval} for --disable-pthread) ;;
   esac],[usepthread=yes])
 
-if test x"$usepthread" = x"yes"; then
-  AC_CHECK_HEADERS(pthread.h)
-fi
-
 dnl Check for headers
 AC_HEADER_STDC
 AC_HEADER_DIRENT
@@ -73,9 +69,15 @@ if test x"$ac_cv_have_libpam" != x"yes"; then
 		AC_CHECK_LIB(crypt, crypt, AUTHLIBS="-lcrypt",, -lcrypt)
 	fi
 fi
-
 AC_SUBST(AUTHLIBS)
 
+dnl Check threading support
+if test x"$usepthread" = x"yes"; then
+  AC_CHECK_HEADERS(pthread.h)
+  AC_SEARCH_LIBS(pthread_cancel, pthread, AC_DEFINE(WITH_PTHREAD))
+  AC_CHECK_FUNCS(pthread_rwlock_init)
+fi
+
 dnl Do we need extra libs for networking?
 AC_CHECK_FUNC(gethostbyname, [true],
     AC_CHECK_LIB(nsl, gethostbyaddr, LIBS="-lnsl $LIBS"))
@@ -87,4 +89,3 @@ dnl Output Makefiles
 AC_OUTPUT(Makefile mailutils.spec include/Makefile include/mailutils/Makefile
  m4/Makefile doc/Makefile lib/Makefile mailbox/Makefile imap4d/Makefile
  mailbox/include/Makefile from/Makefile mail/Makefile pop3d/Makefile)
-

@@ -96,8 +96,8 @@ extern int message_set_get_part      __P ((message_t, int (*_get_part)
 					   __P ((message_t, size_t,
 						 message_t *)), void *owner));
 
-extern int message_get_uidl          __P ((message_t, char *, size_t, size_t *));
-extern int message_set_uidl          __P ((message_t, int (*_get_uidl)
+extern int message_get_uid           __P ((message_t, char *, size_t, size_t *));
+extern int message_set_uid           __P ((message_t, int (*_get_uid)
 					   __P ((message_t, char *, size_t,
 						 size_t *)), void *owner));
 

@@ -15,6 +15,9 @@
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>

@@ -15,6 +15,9 @@
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
 #include <errno.h>
 #include <stdlib.h>
 #include <envelope0.h>

@@ -26,6 +26,7 @@
 #include <string.h>
 #include <glob.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 #include <folder0.h>
 #include <registrar0.h>

@@ -17,7 +17,7 @@
 
 
 #ifdef HAVE_CONFIG_H
-# include "config.h"
+# include <config.h>
 #endif
 
 #include <string.h>

@@ -22,11 +22,6 @@
 #  include <dmalloc.h>
 #endif
 
-#ifdef HAVE_PTHREAD_H
-#  define __USE_UNIX98 /* ?? */
-#  include <pthread.h>
-#endif
-
 #include <sys/types.h>
 #include <stdio.h>
 

@@ -63,7 +63,7 @@ struct _message
   size_t hdr_buflen;
   int hdr_done;
 
-  int (*_get_uidl)       __P ((message_t, char *, size_t, size_t *));
+  int (*_get_uid)       __P ((message_t, char *, size_t, size_t *));
   int (*_get_num_parts)  __P ((message_t, size_t *));
   int (*_get_part)       __P ((message_t, size_t, message_t *));
   int (*_is_multipart)   __P ((message_t, int *));

@@ -34,6 +34,7 @@
 #include <limits.h>
 #include <errno.h>
 #ifdef HAVE_PTHREAD_H
+#  define _XOPEN_SOURCE  500
 #  include <pthread.h>
 #endif
 
@@ -140,7 +141,9 @@ static int mbox_body_size (body_t, size_t *);
 static int mbox_body_lines (body_t, size_t *);
 static int mbox_envelope_sender (envelope_t, char *, size_t, size_t *);
 static int mbox_envelope_date (envelope_t, char *, size_t, size_t *);
+#ifdef WITH_PTHREAD
 static void mbox_cleanup (void *);
+#endif
 
 /* We allocate the mbox_data_t struct, but don't do any parsing on the name or
    even test for existence.  However we do strip any leading "mbox:" part of
@@ -1367,6 +1370,7 @@ mbox_messages_count (mailbox_t mailbox, size_t *pcount)
   return 0;
 }
 
+#ifdef WITH_PTHREAD
 static void
 mbox_cleanup (void *arg)
 {
@@ -1374,3 +1378,4 @@ mbox_cleanup (void *arg)
   monitor_unlock (mailbox->monitor);
   locker_unlock (mailbox->locker);
 }
+#endif

@@ -95,7 +95,7 @@ static int pop_top (stream_t, char *, size_t, off_t, size_t *);
 static int pop_retr (pop_message_t, char *, size_t, off_t, size_t *);
 static int pop_get_fd (pop_message_t, int *);
 static int pop_attr_flags (attribute_t, int *);
-static int pop_uidl (message_t, char *, size_t, size_t *);
+static int pop_uid (message_t, char *, size_t, size_t *);
 static int fill_buffer (pop_data_t, char *, size_t);
 static int pop_readline (pop_data_t);
 static int pop_read_ack (pop_data_t);
@@ -695,7 +695,7 @@ pop_get_message (mailbox_t mbox, size_t msgno, message_t *pmsg)
   }
 
   /* Set the UIDL call on the message. */
-  message_set_uidl (msg, pop_uidl, mpm);
+  message_set_uid (msg, pop_uid, mpm);
 
   /* Add it to the list.  */
   monitor_wrlock (mbox->monitor);
@@ -958,7 +958,7 @@ pop_message_size (message_t msg, size_t *psize)
 
     default:
       /*
-	fprintf (stderr, "pop_uidl state\n");
+	fprintf (stderr, "pop_uid state\n");
       */
       break;
     }
@@ -1073,14 +1073,14 @@ pop_get_fd (pop_message_t mpm, int *pfd)
    FIXME:  We should check this with CAPA and fall back to md5 scheme ?
    Or maybe check for "X-UIDL" a la Qpopper ?  */
 static int
-pop_uidl (message_t msg, char *buffer, size_t buflen, size_t *pnwriten)
+pop_uid (message_t msg, char *buffer, size_t buflen, size_t *pnwriten)
 {
   pop_message_t mpm = message_get_owner (msg);
   pop_data_t mpd;
   int status = 0;
-  void *func = (void *)pop_uidl;
+  void *func = (void *)pop_uid;
   size_t num;
-  /* According to the RFC uidl's are no longer then 70 chars.  */
+  /* According to the RFC uid's are no longer then 70 chars.  */
   char uniq[128];
 
   if (mpm == NULL)
@@ -1115,7 +1115,7 @@ pop_uidl (message_t msg, char *buffer, size_t buflen, size_t *pnwriten)
 
     default:
       /*
-	fprintf (stderr, "pop_uidl state\n");
+	fprintf (stderr, "pop_uid state\n");
       */
       break;
     }

@@ -418,7 +418,7 @@ message_set_attribute (message_t msg, attribute_t attribute, void *owner)
 }
 
 int
-message_get_uidl (message_t msg, char *buffer, size_t buflen, size_t *pwriten)
+message_get_uid (message_t msg, char *buffer, size_t buflen, size_t *pwriten)
 {
   header_t header = NULL;
   size_t n = 0;
@@ -428,8 +428,8 @@ message_get_uidl (message_t msg, char *buffer, size_t buflen, size_t *pwriten)
     return EINVAL;
 
   buffer[0] = '\0';
-  if (msg->_get_uidl)
-    return msg->_get_uidl (msg, buffer, buflen, pwriten);
+  if (msg->_get_uid)
+    return msg->_get_uid (msg, buffer, buflen, pwriten);
 
   /* Be compatible with Qpopper ? qppoper saves the UIDL in "X-UIDL".
      We use "Message-ID" as a fallback.  Is this bad ? should we generate
@@ -458,14 +458,14 @@ message_get_uidl (message_t msg, char *buffer, size_t buflen, size_t *pwriten)
 }
 
 int
-message_set_uidl (message_t msg, int (* _get_uidl)
+message_set_uid (message_t msg, int (* _get_uid)
 		  __P ((message_t, char *, size_t, size_t *)), void *owner)
 {
   if (msg == NULL)
     return EINVAL;
   if (msg->owner != owner)
     return EACCES;
-  msg->_get_uidl = _get_uidl;
+  msg->_get_uid = _get_uid;
   return 0;
 }
 

@@ -15,7 +15,9 @@
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
-
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>

@@ -15,37 +15,44 @@
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
-#include <errno.h>
-#include <stdlib.h>
+/* Tell GLIBC that we want UNIX98 pthread_rwlock_xx() functions.  */
+#define _XOPEN_SOURCE   500
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
 
-#ifdef HAVE_PTHREAD_H
-#  define __USE_UNIX98
+#ifdef WITH_PTHREAD
+#  ifdef HAVE_PTHREAD_H
 #    include <pthread.h>
+#  endif
 #endif
+#include <errno.h>
+#include <stdlib.h>
 
 #include <monitor0.h>
 
 
 #ifdef WITH_PTHREAD
 pthread_mutex_t monitor_lock = PTHREAD_MUTEX_INITIALIZER;
-#define STATIC_LOCK(m) pthread_mutex_lock(m)
-#define STATIC_UNLOCK(m) pthread_mutex_unlock(m)
+#  define STATIC_LOCK(m) pthread_mutex_lock(m)
+#  define STATIC_UNLOCK(m) pthread_mutex_unlock(m)
 #else
-#define STATIC_LOCK(m) 0
-#define STATIC_UNLOCK(m) 0
+#  define STATIC_LOCK(m) 0
+#  define STATIC_UNLOCK(m) 0
 int monitor_lock;
 #endif
 
 union _p_lock
 {
 #ifdef WITH_PTHREAD
-#  ifdef USE_RWLOCK
+#  ifdef HAVE_PTHREAD_RWLOCK_INIT
      pthread_rwlock_t mutex;
 #  else
      pthread_mutex_t mutex;
 #  endif
-#endif
+#else
   int dummy;
+#endif
 };
 
 typedef union _p_lock *p_lock_t;
@@ -198,17 +205,8 @@ monitor_notify (monitor_t monitor)
 
 /* Concrete Implementation of pthread base on rwlocks.  */
 
-#define USE_RWLOCK
 #ifdef WITH_PTHREAD
-#  ifdef USE_RWLOCK
-#    define RWLOCK_INIT(rwl, attr)  pthread_mutex_init (rwl, attr)
-#    define RWLOCK_DESTROY(rwl)     pthread_mutex_destroy (rwl)
-#    define RWLOCK_RDLOCK(rwl)      pthread_mutex_lock (rwl)
-#    define RWLOCK_TRYRDLOCK(rwl)   pthread_mutex_trylock (rwl)
-#    define RWLOCK_WRLOCK(rwl)      pthread_mutex_lock (rwl)
-#    define RWLOCK_TRYWRLOCK(rwl)   pthread_mutex_trylock (rwl)
-#    define RWLOCK_UNLOCK(rwl)      pthread_mutex_unlock (rwl)
-#  else
+#  ifdef HAVE_PTHREAD_RWLOCK_INIT
 #    define RWLOCK_INIT(rwl, attr)  pthread_rwlock_init (rwl, attr)
 #    define RWLOCK_DESTROY(rwl)     pthread_rwlock_destroy (rwl)
 #    define RWLOCK_RDLOCK(rwl)      pthread_rwlock_rdlock (rwl)
@@ -216,6 +214,14 @@ monitor_notify (monitor_t monitor)
 #    define RWLOCK_WRLOCK(rwl)      pthread_rwlock_wrlock (rwl)
 #    define RWLOCK_TRYWRLOCK(rwl)   pthread_rwlock_trywrlock (rwl)
 #    define RWLOCK_UNLOCK(rwl)      pthread_rwlock_unlock (rwl)
+#  else
+#    define RWLOCK_INIT(rwl, attr)  pthread_mutex_init (rwl, attr)
+#    define RWLOCK_DESTROY(rwl)     pthread_mutex_destroy (rwl)
+#    define RWLOCK_RDLOCK(rwl)      pthread_mutex_lock (rwl)
+#    define RWLOCK_TRYRDLOCK(rwl)   pthread_mutex_trylock (rwl)
+#    define RWLOCK_WRLOCK(rwl)      pthread_mutex_lock (rwl)
+#    define RWLOCK_TRYWRLOCK(rwl)   pthread_mutex_trylock (rwl)
+#    define RWLOCK_UNLOCK(rwl)      pthread_mutex_unlock (rwl)
 #  endif
 #else
 #  define RWLOCK_INIT(rwl, attr)    0

@@ -42,7 +42,7 @@ pop3_uidl (const char *arg)
           message_get_attribute (msg, &attr);
           if (!attribute_is_deleted (attr))
             {
-              message_get_uidl (msg, uidl, sizeof (uidl), NULL);
+              message_get_uid (msg, uidl, sizeof (uidl), NULL);
               fprintf (ofile, "%d %s\r\n", mesgno, uidl);
             }
         }
@@ -56,7 +56,7 @@ pop3_uidl (const char *arg)
       message_get_attribute (msg, &attr);
       if (attribute_is_deleted (attr))
         return ERR_MESG_DELE;
-      message_get_uidl (msg, uidl, sizeof (uidl), NULL);
+      message_get_uid (msg, uidl, sizeof (uidl), NULL);
       fprintf (ofile, "+OK %d %s\r\n", mesgno, uidl);
     }