fix for single threaded configurations

[Andreas Tobler <toa at pop dot agri dot ch>]

Hello all,

this patch fixes compilation for configuration where 
--enable-threads=single.

We do not want to use the reentrant functions like getpwuid_r or others 
when we do not have a threaded environment.
The mentioned function(s) is(are) only available on systems which 
supports the POSIX threads.
So an additional check on _POSIX_PTHREAD_SEMANTICS should be enough to 
make it work.

The actual use case is a single threaded config on hpux-pa, the _r 
functions are available in the headers check but not in the lib we link.

I've tested this patch on darwin-ppc, linux-ppc and hpux-pa. On all 
archs is see the right reference, on darwin and linux-ppc I have my 
getpwuid_r in the .o and on hpux-pa single threaded I have the getpwuid. 
I also see the getpwuid_r on hpux-pa if compiled for posix threads.


Is this patch ok for trunk?

Thanks,
Andreas

2006-08-01  Andreas Tobler  <a.tobler@schweiz.ch>

	* gnu/classpath/natSystemProperties.cc: Add additional check for
	getpwuid_r on _POSIX_PTHREAD_SEMANTICS.
	(SystemProperties::insertSystemProperties): Likewise.
	* java/io/natFilePosix.cc (File::performList): Add
	additional check for readdir_r on _POSIX_PTHREAD_SEMANTICS.
	* java/util/natVMTimeZone.cc (VMTimeZone::getSystemTimeZoneId): Add
	additional check for localtime_r on _POSIX_PTHREAD_SEMANTICS.


Index: gnu/classpath/natSystemProperties.cc
===================================================================
--- gnu/classpath/natSystemProperties.cc	(revision 115850)
+++ gnu/classpath/natSystemProperties.cc	(working copy)
@@ -82,7 +82,7 @@
 
 static const char *default_file_encoding = DEFAULT_FILE_ENCODING;
 
-#if HAVE_GETPWUID_R
+#if defined(HAVE_GETPWUID_R) && defined(_POSIX_PTHREAD_SEMANTICS)
 /* Use overload resolution to find out the signature of getpwuid_r.  */
 
   /* This is Posix getpwuid_r.  */
@@ -223,7 +223,7 @@
   uid_t user_id = getuid ();
   struct passwd *pwd_entry;
 
-#ifdef HAVE_GETPWUID_R
+#if defined(HAVE_GETPWUID_R) && defined(_POSIX_PTHREAD_SEMANTICS)
   struct passwd pwd_r;
   size_t len_r = 200;
   char *buf_r = (char *) _Jv_AllocBytes (len_r);
Index: java/io/natFilePosix.cc
===================================================================
--- java/io/natFilePosix.cc	(revision 115850)
+++ java/io/natFilePosix.cc	(working copy)
@@ -1,6 +1,7 @@
 // natFile.cc - Native part of File class for POSIX.
 
-/* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003  Free Software Foundation
+/* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2006
+   Free Software Foundation
 
    This file is part of libgcj.
 
@@ -288,7 +289,7 @@
 
   java::util::ArrayList *list = new java::util::ArrayList ();
   struct dirent *d;
-#ifdef HAVE_READDIR_R
+#if defined(HAVE_READDIR_R) && defined(_POSIX_PTHREAD_SEMANTICS)
   int name_max = pathconf (buf, _PC_NAME_MAX);
   char dbuf[sizeof (struct dirent) + name_max + 1];
   while (readdir_r (dir, (struct dirent *) dbuf, &d) == 0 && d != NULL)
Index: java/util/natVMTimeZone.cc
===================================================================
--- java/util/natVMTimeZone.cc	(revision 115850)
+++ java/util/natVMTimeZone.cc	(working copy)
@@ -1,6 +1,6 @@
 // natVMTimeZone.cc -- Native side of VMTimeZone class.
 
-/* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004
+/* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006
    Free Software Foundation
 
    This file is part of libgcj.
@@ -54,7 +54,7 @@
 java::util::VMTimeZone::getSystemTimeZoneId()
 {
   struct tm tim;
-#ifndef HAVE_LOCALTIME_R
+#if !defined(HAVE_LOCALTIME_R) || !defined(_POSIX_PTHREAD_SEMANTICS)
   struct tm *lt_tim;
 #endif
 #ifdef HAVE_TM_ZONE
@@ -66,7 +66,7 @@
   char *tzid;
 
   time(&current_time);
-#ifdef HAVE_LOCALTIME_R
+#if defined(HAVE_LOCALTIME_R) && defined(_POSIX_PTHREAD_SEMANTICS)
   localtime_r(&current_time, &tim);
 #else
   /* Fall back on non-thread safe localtime. */