* unix/tkUnix.c (Tk_GetUserInactiveTime): Improvements to get it

working on Solaris, and panic if we run out of memory.
* unix/configure.in: Rework the searching for Xss, to make it work
on Solaris and provide more useful output. Use AC_HELP_STRING
where appropriate.
* unix/tcl.m4: synced from Tcl.
* unix/configure: regenerated with autoconf 2.59.

4 files changed, 424 insertions, 120 deletions

diff --git a/unix/configure b/unix/configure
index c97999a..3f444fa 100755
--- a/unix/configure
+++ b/unix/configure
@@ -845,27 +845,32 @@ if test -n "$ac_init_help"; then
 Optional Features:
   --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
-  --enable-man-symlinks   use symlinks for the manpages
+  --enable-man-symlinks   use symlinks for the manpages (default: off)
   --enable-man-compression=PROG
-                          compress the manpages with PROG
+                          compress the manpages with PROG (default: off)
   --enable-man-suffix=STRING
                           use STRING as a suffix to manpage file names
-                          (default: tk)
-  --enable-threads        build with threads
-  --enable-shared         build and link with shared libraries --enable-shared
-  --enable-64bit          enable 64bit support (where applicable)
-  --enable-64bit-vis      enable 64bit Sparc VIS support
-  --enable-corefoundation use CoreFoundation API --enable-corefoundation
+                          (default: no, tk if enabled without
+                          specifying STRING)
+  --enable-threads        build with threads (default: off)
+  --enable-shared         build and link with shared libraries (default: on)
+  --enable-64bit          enable 64bit support (default: off)
+  --enable-64bit-vis      enable 64bit Sparc VIS support (default: off)
+  --enable-corefoundation use CoreFoundation API on MacOSX (default: yes)
   --disable-load          disallow dynamic loading and "load" command
-  --enable-symbols        build with debugging symbols --disable-symbols
-  --enable-aqua           enable Aqua windowingsystem on Mac OS X --disable-aqua
-  --enable-xft         Use freetype/fontconfig/xft --disable-xft
-  --enable-framework      package shared libraries in MacOSX frameworks --disable-framework
+                          (default: enabled)
+  --enable-symbols        build with debugging symbols (default: off)
+  --enable-aqua           enable Aqua windowingsystem on Mac OS X (default:
+                          off)
+  --enable-xft            Use freetype/fontconfig/xft (default: off)
+  --enable-framework      package shared libraries in MacOSX frameworks
+                          (default: off)
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
   --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
-  --with-tcl              directory containing tcl configuration (tclConfig.sh)
+  --with-tcl              directory containing tcl configuration
+                          (tclConfig.sh)
   --with-x                use the X Window System
 
 Some influential environment variables:
@@ -1529,56 +1534,61 @@ TK_SRC_DIR=`cd $srcdir/..; pwd`
 # Compress and/or soft link the manpages?
 #------------------------------------------------------------------------
 
-
-	echo "$as_me:$LINENO: checking whether to use symlinks for manpages" >&5
+    echo "$as_me:$LINENO: checking whether to use symlinks for manpages" >&5
 echo $ECHO_N "checking whether to use symlinks for manpages... $ECHO_C" >&6
-	# Check whether --enable-man-symlinks or --disable-man-symlinks was given.
+    # Check whether --enable-man-symlinks or --disable-man-symlinks was given.
 if test "${enable_man_symlinks+set}" = set; then
   enableval="$enable_man_symlinks"
   test "$enableval" != "no" && MAN_FLAGS="$MAN_FLAGS --symlinks"
 else
   enableval="no"
 fi;
-	echo "$as_me:$LINENO: result: $enableval" >&5
+    echo "$as_me:$LINENO: result: $enableval" >&5
 echo "${ECHO_T}$enableval" >&6
 
-	echo "$as_me:$LINENO: checking whether to compress the manpages" >&5
+    echo "$as_me:$LINENO: checking whether to compress the manpages" >&5
 echo $ECHO_N "checking whether to compress the manpages... $ECHO_C" >&6
-	# Check whether --enable-man-compression or --disable-man-compression was given.
+    # Check whether --enable-man-compression or --disable-man-compression was given.
 if test "${enable_man_compression+set}" = set; then
   enableval="$enable_man_compression"
-  test "$enableval" = "yes" && { { echo "$as_me:$LINENO: error: missing argument to --enable-man-compression" >&5
+  case $enableval in
+	    yes) { { echo "$as_me:$LINENO: error: missing argument to --enable-man-compression" >&5
 echo "$as_me: error: missing argument to --enable-man-compression" >&2;}
-   { (exit 1); exit 1; }; }
-		test "$enableval" != "no" && MAN_FLAGS="$MAN_FLAGS --compress $enableval"
+   { (exit 1); exit 1; }; };;
+	    no)  ;;
+	    *)   MAN_FLAGS="$MAN_FLAGS --compress $enableval";;
+	esac
 else
   enableval="no"
 fi;
-	echo "$as_me:$LINENO: result: $enableval" >&5
+    echo "$as_me:$LINENO: result: $enableval" >&5
 echo "${ECHO_T}$enableval" >&6
-	if test "$enableval" != "no"; then
-		echo "$as_me:$LINENO: checking for compressed file suffix" >&5
+    if test "$enableval" != "no"; then
+	echo "$as_me:$LINENO: checking for compressed file suffix" >&5
 echo $ECHO_N "checking for compressed file suffix... $ECHO_C" >&6
-		touch TeST
-		$enableval TeST
-		Z=`ls TeST* | sed 's/^....//'`
-		rm -f TeST*
-		MAN_FLAGS="$MAN_FLAGS --extension $Z"
-		echo "$as_me:$LINENO: result: $Z" >&5
+	touch TeST
+	$enableval TeST
+	Z=`ls TeST* | sed 's/^....//'`
+	rm -f TeST*
+	MAN_FLAGS="$MAN_FLAGS --extension $Z"
+	echo "$as_me:$LINENO: result: $Z" >&5
 echo "${ECHO_T}$Z" >&6
-	fi
+    fi
 
-	echo "$as_me:$LINENO: checking whether to add a package name suffix for the manpages" >&5
+    echo "$as_me:$LINENO: checking whether to add a package name suffix for the manpages" >&5
 echo $ECHO_N "checking whether to add a package name suffix for the manpages... $ECHO_C" >&6
-	# Check whether --enable-man-suffix or --disable-man-suffix was given.
+    # Check whether --enable-man-suffix or --disable-man-suffix was given.
 if test "${enable_man_suffix+set}" = set; then
   enableval="$enable_man_suffix"
-  test "$enableval" = "yes" && enableval="tk"
-		test "$enableval" != "no" && MAN_FLAGS="$MAN_FLAGS --suffix $enableval"
+  case $enableval in
+	    yes) enableval="tk";;
+	    no)  ;;
+	    *)   MAN_FLAGS="$MAN_FLAGS --suffix $enableval";;
+	esac
 else
   enableval="no"
 fi;
-	echo "$as_me:$LINENO: result: $enableval" >&5
+    echo "$as_me:$LINENO: result: $enableval" >&5
 echo "${ECHO_T}$enableval" >&6
 
 
@@ -9281,28 +9291,187 @@ fi
 #--------------------------------------------------------------------
 
 if test $tk_aqua = no; then
-    echo "$as_me:$LINENO: checking for XScreenSaver support" >&5
-echo $ECHO_N "checking for XScreenSaver support... $ECHO_C" >&6
+
     tk_oldCFlags=$CFLAGS
     CFLAGS="$CFLAGS $XINCLUDES"
     tk_oldLibs=$LIBS
-    LIBS="$LIBS $XLIBSW -lXss -lXext"
-    cat >conftest.$ac_ext <<_ACEOF
+    LIBS="$tk_oldLibs $XLIBSW"
+    xss_header_found=no
+    echo "$as_me:$LINENO: checking for X11/extensions/scrnsaver.h" >&5
+echo $ECHO_N "checking for X11/extensions/scrnsaver.h... $ECHO_C" >&6
+if test "${ac_cv_header_X11_extensions_scrnsaver_h+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <X11/Xlib.h>
+
+#include <X11/extensions/scrnsaver.h>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_header_X11_extensions_scrnsaver_h=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_header_X11_extensions_scrnsaver_h=no
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $ac_cv_header_X11_extensions_scrnsaver_h" >&5
+echo "${ECHO_T}$ac_cv_header_X11_extensions_scrnsaver_h" >&6
+if test $ac_cv_header_X11_extensions_scrnsaver_h = yes; then
+
+	xss_header_found=yes
+
+fi
+
+
+    xss_lib_found=no
+    echo "$as_me:$LINENO: checking for XScreenSaverQueryInfo" >&5
+echo $ECHO_N "checking for XScreenSaverQueryInfo... $ECHO_C" >&6
+if test "${ac_cv_func_XScreenSaverQueryInfo+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
 /* confdefs.h.  */
 _ACEOF
 cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
+/* Define XScreenSaverQueryInfo to an innocuous variant, in case <limits.h> declares XScreenSaverQueryInfo.
+   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
+#define XScreenSaverQueryInfo innocuous_XScreenSaverQueryInfo
+
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char XScreenSaverQueryInfo (); below.
+    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+    <limits.h> exists even on freestanding compilers.  */
+
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+
+#undef XScreenSaverQueryInfo
 
-        #include <X11/Xlib.h>
-        #include <X11/extensions/scrnsaver.h>
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char XScreenSaverQueryInfo ();
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_XScreenSaverQueryInfo) || defined (__stub___XScreenSaverQueryInfo)
+choke me
+#else
+char (*f) () = XScreenSaverQueryInfo;
+#endif
+#ifdef __cplusplus
+}
+#endif
 
 int
 main ()
 {
+return f != XScreenSaverQueryInfo;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_func_XScreenSaverQueryInfo=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
 
-        XScreenSaverAllocInfo();
+ac_cv_func_XScreenSaverQueryInfo=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $ac_cv_func_XScreenSaverQueryInfo" >&5
+echo "${ECHO_T}$ac_cv_func_XScreenSaverQueryInfo" >&6
+if test $ac_cv_func_XScreenSaverQueryInfo = yes; then
+  :
+else
 
+	echo "$as_me:$LINENO: checking for XScreenSaverQueryInfo in -lXext" >&5
+echo $ECHO_N "checking for XScreenSaverQueryInfo in -lXext... $ECHO_C" >&6
+if test "${ac_cv_lib_Xext_XScreenSaverQueryInfo+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lXext  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char XScreenSaverQueryInfo ();
+int
+main ()
+{
+XScreenSaverQueryInfo ();
   ;
   return 0;
 }
@@ -9329,25 +9498,110 @@ if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
   ac_status=$?
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
   (exit $ac_status); }; }; then
+  ac_cv_lib_Xext_XScreenSaverQueryInfo=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
 
-        echo "$as_me:$LINENO: result: yes" >&5
-echo "${ECHO_T}yes" >&6
-        XLIBSW="$XLIBSW -lXss -lXext"
+ac_cv_lib_Xext_XScreenSaverQueryInfo=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_Xext_XScreenSaverQueryInfo" >&5
+echo "${ECHO_T}$ac_cv_lib_Xext_XScreenSaverQueryInfo" >&6
+if test $ac_cv_lib_Xext_XScreenSaverQueryInfo = yes; then
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_XSS 1
-_ACEOF
+	    XLIBSW="$XLIBSW -lXext"
+	    xss_lib_found=yes
 
+else
 
+	    echo "$as_me:$LINENO: checking for XScreenSaverQueryInfo in -lXss" >&5
+echo $ECHO_N "checking for XScreenSaverQueryInfo in -lXss... $ECHO_C" >&6
+if test "${ac_cv_lib_Xss_XScreenSaverQueryInfo+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lXss -lXext $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char XScreenSaverQueryInfo ();
+int
+main ()
+{
+XScreenSaverQueryInfo ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_Xss_XScreenSaverQueryInfo=yes
 else
   echo "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-echo "$as_me:$LINENO: result: no" >&5
-echo "${ECHO_T}no" >&6
+ac_cv_lib_Xss_XScreenSaverQueryInfo=no
 fi
 rm -f conftest.err conftest.$ac_objext \
       conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_Xss_XScreenSaverQueryInfo" >&5
+echo "${ECHO_T}$ac_cv_lib_Xss_XScreenSaverQueryInfo" >&6
+if test $ac_cv_lib_Xss_XScreenSaverQueryInfo = yes; then
+
+		XLIBSW="$XLIBSW -lXss -lXext"
+		xss_lib_found=yes
+
+fi
+
+
+fi
+
+
+fi
+
+    if test $xss_lib_found = yes -a $xss_header_found = yes; then
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_XSS 1
+_ACEOF
+
+    fi
     CFLAGS=$tk_oldCFlags
     LIBS=$tk_oldLibs
 fi
diff --git a/unix/configure.in b/unix/configure.in
index 1e18a59..168d3d5 100644
--- a/unix/configure.in
+++ b/unix/configure.in
@@ -3,7 +3,7 @@ dnl	This file is an input file used by the GNU "autoconf" program to
 dnl	generate the file "configure", which is run during Tk installation
 dnl	to configure the system for the local environment.
 #
-# RCS: @(#) $Id: configure.in,v 1.107 2005/05/29 07:53:09 das Exp $
+# RCS: @(#) $Id: configure.in,v 1.108 2005/06/02 10:08:06 rmax Exp $
 
 AC_INIT([tk],[8.5])
 AC_PREREQ(2.57)
@@ -210,7 +210,9 @@ fi
 #--------------------------------------------------------------------
 
 if test "`uname -s`" = "Darwin" ; then
-    AC_ARG_ENABLE(aqua, [  --enable-aqua           enable Aqua windowingsystem on Mac OS X [--disable-aqua]],
+    AC_ARG_ENABLE(aqua,
+		AC_HELP_STRING([--enable-aqua],
+                              [enable Aqua windowingsystem on Mac OS X (default: off)]),
                   [tk_aqua=$enableval], [tk_aqua=no])
     if test $tk_aqua = yes; then
         if test $tcl_corefoundation = no; then
@@ -331,21 +333,30 @@ fi
 #--------------------------------------------------------------------
 
 if test $tk_aqua = no; then
-    AC_MSG_CHECKING([for XScreenSaver support])
+
     tk_oldCFlags=$CFLAGS
     CFLAGS="$CFLAGS $XINCLUDES"
     tk_oldLibs=$LIBS
-    LIBS="$LIBS $XLIBSW -lXss -lXext"
-    AC_TRY_LINK([
-        #include <X11/Xlib.h>
-        #include <X11/extensions/scrnsaver.h>
-    ] , [
-        XScreenSaverAllocInfo();
-    ], [
-        AC_MSG_RESULT(yes)
-        XLIBSW="$XLIBSW -lXss -lXext"
-        AC_DEFINE(HAVE_XSS, 1, [Is XScreenSaver available?])
-    ], AC_MSG_RESULT(no))
+    LIBS="$tk_oldLibs $XLIBSW"
+    xss_header_found=no
+    AC_CHECK_HEADER(X11/extensions/scrnsaver.h, [
+	xss_header_found=yes
+    ],,[#include <X11/Xlib.h>])
+    xss_lib_found=no
+    AC_CHECK_FUNC(XScreenSaverQueryInfo,,[
+	AC_CHECK_LIB(Xext, XScreenSaverQueryInfo, [
+	    XLIBSW="$XLIBSW -lXext"
+	    xss_lib_found=yes
+	], [
+	    AC_CHECK_LIB(Xss,XScreenSaverQueryInfo, [
+		XLIBSW="$XLIBSW -lXss -lXext"
+		xss_lib_found=yes
+	    ],, -lXext)
+	])
+    ])
+    if test $xss_lib_found = yes -a $xss_header_found = yes; then
+	AC_DEFINE(HAVE_XSS, 1, [Is XScreenSaver available?])
+    fi
     CFLAGS=$tk_oldCFlags
     LIBS=$tk_oldLibs
 fi
@@ -356,7 +367,7 @@ fi
 
 if test $tk_aqua = no; then
     AC_ARG_ENABLE(xft,
-        [  --enable-xft         Use freetype/fontconfig/xft [--disable-xft]],
+        AC_HELP_STRING([--enable-xft],[Use freetype/fontconfig/xft (default: off)]),
         [enable_xft=$enableval],
         [enable_xft="no"])
     
diff --git a/unix/tcl.m4 b/unix/tcl.m4
index ee19532..1402309 100644
--- a/unix/tcl.m4
+++ b/unix/tcl.m4
@@ -27,7 +27,10 @@ AC_DEFUN(SC_PATH_TCLCONFIG, [
     if test x"${no_tcl}" = x ; then
 	# we reset no_tcl in case something fails here
 	no_tcl=true
-	AC_ARG_WITH(tcl, [  --with-tcl              directory containing tcl configuration (tclConfig.sh)], with_tclconfig=${withval})
+	AC_ARG_WITH(tcl,
+	    AC_HELP_STRING([--with-tcl],
+		[directory containing tcl configuration (tclConfig.sh)]),
+	    with_tclconfig=${withval})
 	AC_MSG_CHECKING([for Tcl configuration])
 	AC_CACHE_VAL(ac_cv_c_tclconfig,[
 
@@ -138,7 +141,10 @@ AC_DEFUN(SC_PATH_TKCONFIG, [
     if test x"${no_tk}" = x ; then
 	# we reset no_tk in case something fails here
 	no_tk=true
-	AC_ARG_WITH(tk, [  --with-tk               directory containing tk configuration (tkConfig.sh)], with_tkconfig=${withval})
+	AC_ARG_WITH(tk,
+	    AC_HELP_STRING([--with-tk],
+		[directory containing tk configuration (tkConfig.sh)]),
+	    with_tkconfig=${withval})
 	AC_MSG_CHECKING([for Tk configuration])
 	AC_CACHE_VAL(ac_cv_c_tkconfig,[
 
@@ -345,7 +351,8 @@ AC_DEFUN(SC_LOAD_TKCONFIG, [
 AC_DEFUN(SC_ENABLE_SHARED, [
     AC_MSG_CHECKING([how to build libraries])
     AC_ARG_ENABLE(shared,
-	[  --enable-shared         build and link with shared libraries [--enable-shared]],
+	AC_HELP_STRING([--enable-shared],
+	    [build and link with shared libraries (default: on)]),
 	[tcl_ok=$enableval], [tcl_ok=yes])
 
     if test "${enable_shared+set}" = set; then
@@ -385,7 +392,8 @@ AC_DEFUN(SC_ENABLE_SHARED, [
 AC_DEFUN(SC_ENABLE_FRAMEWORK, [
     AC_MSG_CHECKING([how to package libraries])
     AC_ARG_ENABLE(framework,
-	[  --enable-framework      package shared libraries in MacOSX frameworks [--disable-framework]],
+	AC_HELP_STRING([--enable-framework],
+	    [package shared libraries in MacOSX frameworks (default: off)]),
 	[tcl_ok=$enableval], [tcl_ok=no])
 
     if test "${enable_framework+set}" = set; then
@@ -437,7 +445,9 @@ AC_DEFUN(SC_ENABLE_FRAMEWORK, [
 
 AC_DEFUN(SC_ENABLE_THREADS, [
     AC_MSG_CHECKING(for building with threads)
-    AC_ARG_ENABLE(threads, [  --enable-threads        build with threads],
+    AC_ARG_ENABLE(threads,
+	AC_HELP_STRING([--enable-threads],
+	    [build with threads (default: off)]),
 	[tcl_ok=$enableval], [tcl_ok=no])
 
     if test "$tcl_ok" = "yes" -o "${TCL_THREADS}" = 1; then
@@ -573,7 +583,10 @@ AC_DEFUN(SC_ENABLE_THREADS, [
 
 AC_DEFUN(SC_ENABLE_SYMBOLS, [
     AC_MSG_CHECKING([for build with symbols])
-    AC_ARG_ENABLE(symbols, [  --enable-symbols        build with debugging symbols [--disable-symbols]],    [tcl_ok=$enableval], [tcl_ok=no])
+    AC_ARG_ENABLE(symbols,
+	AC_HELP_STRING([--enable-symbols],
+	    [build with debugging symbols (default: off)]),
+	[tcl_ok=$enableval], [tcl_ok=no])
 # FIXME: Currently, LDFLAGS_DEFAULT is not used, it should work like CFLAGS_DEFAULT.
     DBGX=""
     if test "$tcl_ok" = "no"; then
@@ -631,8 +644,8 @@ AC_DEFUN(SC_ENABLE_SYMBOLS, [
 
 AC_DEFUN(SC_ENABLE_LANGINFO, [
     AC_ARG_ENABLE(langinfo,
-	[  --enable-langinfo	  use nl_langinfo if possible to determine
-			  encoding at startup, otherwise use old heuristic],
+	AC_HELP_STRING([--enable-langinfo],
+	    [use nl_langinfo if possible to determine encoding at startup, otherwise use old heuristic (default: on)]),
 	[langinfo_ok=$enableval], [langinfo_ok=yes])
 
     HAVE_LANGINFO=0
@@ -681,44 +694,50 @@ AC_DEFUN(SC_ENABLE_LANGINFO, [
 #			according to the user's selection.
 #
 #--------------------------------------------------------------------
-AC_DEFUN(SC_CONFIG_MANPAGES, [
-
-	AC_MSG_CHECKING([whether to use symlinks for manpages])
-	AC_ARG_ENABLE(man-symlinks,
-		AC_HELP_STRING([--enable-man-symlinks],
-			[use symlinks for the manpages]),
-		test "$enableval" != "no" && MAN_FLAGS="$MAN_FLAGS --symlinks",
-		enableval="no")
-	AC_MSG_RESULT([$enableval])
-
-	AC_MSG_CHECKING([whether to compress the manpages])
-	AC_ARG_ENABLE(man-compression,
-		AC_HELP_STRING([--enable-man-compression=PROG],
-			[compress the manpages with PROG]),
-		test "$enableval" = "yes" && AC_MSG_ERROR([missing argument to --enable-man-compression])
-		test "$enableval" != "no" && MAN_FLAGS="$MAN_FLAGS --compress $enableval",
-		enableval="no")
-	AC_MSG_RESULT([$enableval])
-	if test "$enableval" != "no"; then
-		AC_MSG_CHECKING([for compressed file suffix])
-		touch TeST
-		$enableval TeST
-		Z=`ls TeST* | sed 's/^....//'`
-		rm -f TeST*
-		MAN_FLAGS="$MAN_FLAGS --extension $Z"
-		AC_MSG_RESULT([$Z])
-	fi
 
-	AC_MSG_CHECKING([whether to add a package name suffix for the manpages])
-	AC_ARG_ENABLE(man-suffix,
-		AC_HELP_STRING([--enable-man-suffix=STRING],
-			  [use STRING as a suffix to manpage file names (default: AC_PACKAGE_NAME)]),
-		test "$enableval" = "yes" && enableval="AC_PACKAGE_NAME"
-		test "$enableval" != "no" && MAN_FLAGS="$MAN_FLAGS --suffix $enableval",
-		enableval="no")
-	AC_MSG_RESULT([$enableval])
+AC_DEFUN(SC_CONFIG_MANPAGES, [
+    AC_MSG_CHECKING([whether to use symlinks for manpages])
+    AC_ARG_ENABLE(man-symlinks,
+	AC_HELP_STRING([--enable-man-symlinks],
+	    [use symlinks for the manpages (default: off)]),
+	test "$enableval" != "no" && MAN_FLAGS="$MAN_FLAGS --symlinks",
+	enableval="no")
+    AC_MSG_RESULT([$enableval])
+
+    AC_MSG_CHECKING([whether to compress the manpages])
+    AC_ARG_ENABLE(man-compression,
+	AC_HELP_STRING([--enable-man-compression=PROG],
+	    [compress the manpages with PROG (default: off)]),
+	[case $enableval in
+	    yes) AC_MSG_ERROR([missing argument to --enable-man-compression]);;
+	    no)  ;;
+	    *)   MAN_FLAGS="$MAN_FLAGS --compress $enableval";;
+	esac],
+	enableval="no")
+    AC_MSG_RESULT([$enableval])
+    if test "$enableval" != "no"; then
+	AC_MSG_CHECKING([for compressed file suffix])
+	touch TeST
+	$enableval TeST
+	Z=`ls TeST* | sed 's/^....//'`
+	rm -f TeST*
+	MAN_FLAGS="$MAN_FLAGS --extension $Z"
+	AC_MSG_RESULT([$Z])
+    fi
 
-	AC_SUBST(MAN_FLAGS)
+    AC_MSG_CHECKING([whether to add a package name suffix for the manpages])
+    AC_ARG_ENABLE(man-suffix,
+	AC_HELP_STRING([--enable-man-suffix=STRING],
+	    [use STRING as a suffix to manpage file names (default: no, AC_PACKAGE_NAME if enabled without specifying STRING)]),
+	[case $enableval in
+	    yes) enableval="AC_PACKAGE_NAME";;
+	    no)  ;;
+	    *)   MAN_FLAGS="$MAN_FLAGS --suffix $enableval";;
+	esac],
+	enableval="no")
+    AC_MSG_RESULT([$enableval])
+
+    AC_SUBST(MAN_FLAGS)
 ])
 
 #--------------------------------------------------------------------
@@ -822,7 +841,10 @@ AC_DEFUN(SC_CONFIG_CFLAGS, [
     # Step 0.a: Enable 64 bit support?
 
     AC_MSG_CHECKING([if 64bit support is requested])
-    AC_ARG_ENABLE(64bit,[  --enable-64bit          enable 64bit support (where applicable)],,enableval="no")
+    AC_ARG_ENABLE(64bit,
+	AC_HELP_STRING([--enable-64bit],
+	    [enable 64bit support (default: off)]),
+	,enableval="no")
 
     if test "$enableval" = "yes"; then
 	do64bit=yes
@@ -834,7 +856,10 @@ AC_DEFUN(SC_CONFIG_CFLAGS, [
     # Step 0.b: Enable Solaris 64 bit VIS support?
 
     AC_MSG_CHECKING([if 64bit Sparc VIS support is requested])
-    AC_ARG_ENABLE(64bit-vis,[  --enable-64bit-vis      enable 64bit Sparc VIS support],,enableval="no")
+    AC_ARG_ENABLE(64bit-vis,
+	AC_HELP_STRING([--enable-64bit-vis],
+	    [enable 64bit Sparc VIS support (default: off)]),
+	,enableval="no")
 
     if test "$enableval" = "yes"; then
 	# Force 64bit on with VIS
@@ -1413,7 +1438,9 @@ dnl AC_CHECK_TOOL(AR, ar)
 	    PLAT_OBJS='${MAC_OSX_OBJS}'
 	    PLAT_SRCS='${MAC_OSX_SRCS}'
             AC_MSG_CHECKING([whether to use CoreFoundation])
-            AC_ARG_ENABLE(corefoundation, [  --enable-corefoundation use CoreFoundation API [--enable-corefoundation]],
+            AC_ARG_ENABLE(corefoundation,
+		AC_HELP_STRING([--enable-corefoundation],
+		    [use CoreFoundation API on MacOSX (default: yes)]),
                 [tcl_corefoundation=$enableval], [tcl_corefoundation=yes])
             AC_MSG_RESULT([$tcl_corefoundation])
             if test $tcl_corefoundation = yes; then
@@ -1818,7 +1845,9 @@ dnl AC_CHECK_TOOL(AR, ar)
 
     # Step 5: disable dynamic loading if requested via a command-line switch.
 
-    AC_ARG_ENABLE(load, [  --disable-load          disallow dynamic loading and "load" command],
+    AC_ARG_ENABLE(load,
+	AC_HELP_STRING([--disable-load],
+	    [disallow dynamic loading and "load" command (default: enabled)]),
 	[tcl_ok=$enableval], [tcl_ok=yes])
     if test "$tcl_ok" = "no"; then
 	DL_OBJS=""
@@ -2258,6 +2287,7 @@ AC_DEFUN(SC_PATH_X, [
 	XLIBSW=-lX11
     fi
 ])
+
 #--------------------------------------------------------------------
 # SC_BLOCKING_STYLE
 #
@@ -2670,7 +2700,10 @@ AC_DEFUN(SC_TCL_64BIT_FLAGS, [
 #--------------------------------------------------------------------
 
 AC_DEFUN(SC_TCL_CFG_ENCODING, [
-    AC_ARG_WITH(encoding, [  --with-encoding              encoding for configuration values], with_tcencoding=${withval})
+    AC_ARG_WITH(encoding,
+	AC_HELP_STRING([--with-encoding],
+	    [encoding for configuration values (default: iso8859-1)]),
+	with_tcencoding=${withval})
 
     if test x"${with_tcencoding}" != x ; then
 	AC_DEFINE_UNQUOTED(TCL_CFGVAL_ENCODING,"${with_tcencoding}",
diff --git a/unix/tkUnix.c b/unix/tkUnix.c
index 3a28cd3..0f93e93 100644
--- a/unix/tkUnix.c
+++ b/unix/tkUnix.c
@@ -10,7 +10,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tkUnix.c,v 1.9 2005/06/01 18:14:40 rmax Exp $
+ * RCS: @(#) $Id: tkUnix.c,v 1.10 2005/06/02 10:08:07 rmax Exp $
  */
 
 #include <tkInt.h>
@@ -196,11 +196,17 @@ Tk_GetUserInactiveTime(dpy)
 #ifdef HAVE_XSS
     int eventBase, errorBase, major, minor;
 
+    /* Calling XScreenSaverQueryVersion seems to be needed to prevent
+     * a crash on some buggy versions of XFree86 */
     if (XScreenSaverQueryExtension(dpy, &eventBase, &errorBase) &&
-	XScreenSaverQueryVersion(dpy, &major, &minor) &&
-	major == 1 && minor == 0 ) {
-	
+	XScreenSaverQueryVersion(dpy, &major, &minor)) {
+
 	XScreenSaverInfo *info = XScreenSaverAllocInfo();
+
+	if (info == NULL) {
+	    /* we are out of memory */
+	    Tcl_Panic("Out of memory: XScreenSaverAllocInfo failed in Tk_GetUserInactiveTime");
+	}
 	if (XScreenSaverQueryInfo(dpy, DefaultRootWindow(dpy), info)) {
 	    inactiveTime = info->idle;
 	}