* macosx/tkMacOSXInit.c:

	* macosx/tkMacOSXNotify.c: introduction of new tcl notifier based on
	CFRunLoop allows replacement of the custom TkAqua notifier by a
	standard tcl event source. Removes requirement of threaded tcl core
	for TkAqua, allows to stub-link TkAqua against Tcl by removing use of
	the unstubbed TclInitNotifier & TclFinalizeNotifier. [Tcl Patch 1202052]

	* macosx/Wish.xcode/project.pbxproj:
	* macosx/Wish.pbproj/project.pbxproj: stub-link TkAqua: build with
	USE_TCL_STUBS and link against libtclstub instead of Tcl.framework,
	unexport libtclstub symbols from Tk to avoid duplicate symbol warnings
	when linking with both Tcl and Tk, fixes for gcc4.0 warnings.

	* macosx/Wish.xcode/project.pbxproj: sync with Wish.pbproj changes
	since 2004-11-19.
	NOTE: to use this project, need to uncomment the tclConfig.h settings
	at the top of tcl/unix/configure.in, autoconf and rebuild tcl !

	* macosx/tkMacOSXBitmap.c:
	* macosx/tkMacOSXButton.c:
	* macosx/tkMacOSXDialog.c:
	* macosx/tkMacOSXFont.c:
	* macosx/tkMacOSXHLEvents.c:
	* macosx/tkMacOSXInit.c:
	* macosx/tkMacOSXKeyboard.c:
	* macosx/tkMacOSXMenu.c:
	* macosx/tkMacOSXMenubutton.c:
	* macosx/tkMacOSXWm.c:
	* macosx/tkMacOSXXStubs.c: fixed gcc 4.0 warnings.

	* unix/tcl.m4: sync with tcl
	* unix/configure: autoconf-2.59

2 files changed, 462 insertions, 10 deletions

diff --git a/unix/configure b/unix/configure
index 406d06c..0aa68c2 100755
--- a/unix/configure
+++ b/unix/configure
@@ -855,6 +855,7 @@ Optional Features:
   --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
   --disable-load          disallow dynamic loading and "load" command
   --enable-symbols        build with debugging symbols --disable-symbols
   --enable-xft         Use freetype/fontconfig/xft --disable-xft
@@ -5755,19 +5756,344 @@ echo "${ECHO_T}$tcl_cv_ld_search_paths_first" >&6
 	    CC_SEARCH_FLAGS=""
 	    LD_SEARCH_FLAGS=""
 	    LD_LIBRARY_PATH_VAR="DYLD_LIBRARY_PATH"
-	    PLAT_OBJS="\${MAC_OSX_OBJS}"
-	    PLAT_SRCS="\${MAC_OSX_SRCS}"
+	    PLAT_OBJS='${MAC_OSX_OBJS}'
+	    PLAT_SRCS='${MAC_OSX_SRCS}'
 	    TCL_SHLIB_LD_EXTRAS='-compatibility_version ${VERSION} -current_version ${VERSION} -install_name ${DYLIB_INSTALL_DIR}/${TCL_LIB_FILE} -seg1addr 0xa000000'
 	    TK_SHLIB_LD_EXTRAS=' -compatibility_version ${VERSION} -current_version ${VERSION} -install_name ${DYLIB_INSTALL_DIR}/${TK_LIB_FILE}  -seg1addr 0xb000000 -unexported_symbols_list $$(f=$(TCL_STUB_LIB_FILE).E && nm -gjp $(TCL_BIN_DIR)/$(TCL_STUB_LIB_FILE) | tail +3 > $$f && echo $$f)'
-	    LIBS="$LIBS -framework CoreFoundation"
+            echo "$as_me:$LINENO: checking whether to use CoreFoundation" >&5
+echo $ECHO_N "checking whether to use CoreFoundation... $ECHO_C" >&6
+            # Check whether --enable-corefoundation or --disable-corefoundation was given.
+if test "${enable_corefoundation+set}" = set; then
+  enableval="$enable_corefoundation"
+  tcl_corefoundation=$enableval
+else
+  tcl_corefoundation=yes
+fi;
+            echo "$as_me:$LINENO: result: $tcl_corefoundation" >&5
+echo "${ECHO_T}$tcl_corefoundation" >&6
+            if test $tcl_corefoundation = yes; then
+                echo "$as_me:$LINENO: checking for CoreFoundation.framework" >&5
+echo $ECHO_N "checking for CoreFoundation.framework... $ECHO_C" >&6
+if test "${tcl_cv_lib_corefoundation+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+
+                    hold_libs=$LIBS
+                    LIBS="$LIBS -framework CoreFoundation"
+                    cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <CoreFoundation/CoreFoundation.h>
+int
+main ()
+{
+CFBundleRef b = CFBundleGetMainBundle();
+  ;
+  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 $ac_status); }; }; then
+  tcl_cv_lib_corefoundation=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+tcl_cv_lib_corefoundation=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+                    LIBS=$hold_libs
+fi
+echo "$as_me:$LINENO: result: $tcl_cv_lib_corefoundation" >&5
+echo "${ECHO_T}$tcl_cv_lib_corefoundation" >&6
+                if test $tcl_cv_lib_corefoundation = yes; then
+                    LIBS="$LIBS -framework CoreFoundation"
 
 cat >>confdefs.h <<\_ACEOF
-#define MAC_OSX_TCL 1
+#define HAVE_COREFOUNDATION 1
+_ACEOF
+
+                fi
+	    fi
+
+for ac_header in libkern/OSAtomic.h
+do
+as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
+else
+  # Is the header compilable?
+echo "$as_me:$LINENO: checking $ac_header usability" >&5
+echo $ECHO_N "checking $ac_header usability... $ECHO_C" >&6
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_includes_default
+#include <$ac_header>
+_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 $ac_status); }; }; then
+  ac_header_compiler=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_header_compiler=no
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
+echo "${ECHO_T}$ac_header_compiler" >&6
+
+# Is the header present?
+echo "$as_me:$LINENO: checking $ac_header presence" >&5
+echo $ECHO_N "checking $ac_header presence... $ECHO_C" >&6
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <$ac_header>
+_ACEOF
+if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
+  (eval $ac_cpp conftest.$ac_ext) 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 $ac_status); } >/dev/null; then
+  if test -s conftest.err; then
+    ac_cpp_err=$ac_c_preproc_warn_flag
+    ac_cpp_err=$ac_cpp_err$ac_c_werror_flag
+  else
+    ac_cpp_err=
+  fi
+else
+  ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+  ac_header_preproc=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  ac_header_preproc=no
+fi
+rm -f conftest.err conftest.$ac_ext
+echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
+echo "${ECHO_T}$ac_header_preproc" >&6
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in
+  yes:no: )
+    { echo "$as_me:$LINENO: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&5
+echo "$as_me: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the compiler's result" >&5
+echo "$as_me: WARNING: $ac_header: proceeding with the compiler's result" >&2;}
+    ac_header_preproc=yes
+    ;;
+  no:yes:* )
+    { echo "$as_me:$LINENO: WARNING: $ac_header: present but cannot be compiled" >&5
+echo "$as_me: WARNING: $ac_header: present but cannot be compiled" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header:     check for missing prerequisite headers?" >&5
+echo "$as_me: WARNING: $ac_header:     check for missing prerequisite headers?" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: see the Autoconf documentation" >&5
+echo "$as_me: WARNING: $ac_header: see the Autoconf documentation" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header:     section \"Present But Cannot Be Compiled\"" >&5
+echo "$as_me: WARNING: $ac_header:     section \"Present But Cannot Be Compiled\"" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: in the future, the compiler will take precedence" >&5
+echo "$as_me: WARNING: $ac_header: in the future, the compiler will take precedence" >&2;}
+    (
+      cat <<\_ASBOX
+## ----------------------------- ##
+## Report this to the tk lists.  ##
+## ----------------------------- ##
+_ASBOX
+    ) |
+      sed "s/^/$as_me: WARNING:     /" >&2
+    ;;
+esac
+echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  eval "$as_ac_Header=\$ac_header_preproc"
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
+
+fi
+if test `eval echo '${'$as_ac_Header'}'` = yes; then
+  cat >>confdefs.h <<_ACEOF
+#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+
+for ac_func in OSSpinLockLock
+do
+as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
+echo "$as_me:$LINENO: checking for $ac_func" >&5
+echo $ECHO_N "checking for $ac_func... $ECHO_C" >&6
+if eval "test \"\${$as_ac_var+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 $ac_func to an innocuous variant, in case <limits.h> declares $ac_func.
+   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
+#define $ac_func innocuous_$ac_func
+
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char $ac_func (); 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 $ac_func
+
+/* 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 $ac_func ();
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
+choke me
+#else
+char (*f) () = $ac_func;
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+int
+main ()
+{
+return f != $ac_func;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$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 $ac_status); }; }; then
+  eval "$as_ac_var=yes"
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+eval "$as_ac_var=no"
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_var'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_var'}'`" >&6
+if test `eval echo '${'$as_ac_var'}'` = yes; then
+  cat >>confdefs.h <<_ACEOF
+#define `echo "HAVE_$ac_func" | $as_tr_cpp` 1
 _ACEOF
 
+fi
+done
+
 
 cat >>confdefs.h <<\_ACEOF
-#define HAVE_CFBUNDLE 1
+#define MAC_OSX_TCL 1
 _ACEOF
 
 
@@ -5785,6 +6111,103 @@ cat >>confdefs.h <<\_ACEOF
 #define MODULE_SCOPE __private_extern__
 _ACEOF
 
+	    # prior to Darwin 7, realpath is not threadsafe, so don't
+	    # use it when threads are enabled, c.f. bug # 711232:
+	    echo "$as_me:$LINENO: checking for realpath" >&5
+echo $ECHO_N "checking for realpath... $ECHO_C" >&6
+if test "${ac_cv_func_realpath+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 realpath to an innocuous variant, in case <limits.h> declares realpath.
+   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
+#define realpath innocuous_realpath
+
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char realpath (); 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 realpath
+
+/* 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 realpath ();
+/* 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_realpath) || defined (__stub___realpath)
+choke me
+#else
+char (*f) () = realpath;
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+int
+main ()
+{
+return f != realpath;
+  ;
+  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 $ac_status); }; }; then
+  ac_cv_func_realpath=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_func_realpath=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $ac_cv_func_realpath" >&5
+echo "${ECHO_T}$ac_cv_func_realpath" >&6
+
+	    if test "$ac_cv_func_realpath" = yes -a "${TCL_THREADS}" = 1 \
+	            -a `uname -r | awk -F. '{print $1}'` -lt 7 ; then
+	        ac_cv_func_realpath=no
+	    fi
 	    ;;
 	NEXTSTEP-*)
 	    SHLIB_CFLAGS=""
diff --git a/unix/tcl.m4 b/unix/tcl.m4
index bbed997..fc4247f 100644
--- a/unix/tcl.m4
+++ b/unix/tcl.m4
@@ -402,6 +402,10 @@ AC_DEFUN(SC_ENABLE_FRAMEWORK, [
 	    AC_MSG_WARN("Frameworks can only be built if --enable-shared is yes")
 	    FRAMEWORK_BUILD=0
 	fi
+	if test $tcl_corefoundation = no; then
+	    AC_MSG_WARN("Frameworks can only be used when CoreFoundation is available")
+	    FRAMEWORK_BUILD=0
+	fi
     else
 	AC_MSG_RESULT([standard shared library])
 	FRAMEWORK_BUILD=0
@@ -1406,17 +1410,42 @@ dnl AC_CHECK_TOOL(AR, ar)
 	    CC_SEARCH_FLAGS=""
 	    LD_SEARCH_FLAGS=""
 	    LD_LIBRARY_PATH_VAR="DYLD_LIBRARY_PATH"
-	    PLAT_OBJS="\${MAC_OSX_OBJS}"
-	    PLAT_SRCS="\${MAC_OSX_SRCS}"
+	    PLAT_OBJS='${MAC_OSX_OBJS}'
+	    PLAT_SRCS='${MAC_OSX_SRCS}'
 	    TCL_SHLIB_LD_EXTRAS='-compatibility_version ${VERSION} -current_version ${VERSION} -install_name ${DYLIB_INSTALL_DIR}/${TCL_LIB_FILE} -seg1addr 0xa000000'
 	    TK_SHLIB_LD_EXTRAS=' -compatibility_version ${VERSION} -current_version ${VERSION} -install_name ${DYLIB_INSTALL_DIR}/${TK_LIB_FILE}  -seg1addr 0xb000000 -unexported_symbols_list $$(f=$(TCL_STUB_LIB_FILE).E && nm -gjp $(TCL_BIN_DIR)/$(TCL_STUB_LIB_FILE) | tail +3 > $$f && echo $$f)'
-	    LIBS="$LIBS -framework CoreFoundation"
-	    AC_DEFINE(MAC_OSX_TCL, 1, ["Is this a Mac I see before me?"])
-	    AC_DEFINE(HAVE_CFBUNDLE, 1, [Do we have access to Mac bundles?])
+            AC_MSG_CHECKING([whether to use CoreFoundation])
+            AC_ARG_ENABLE(corefoundation, [  --enable-corefoundation use CoreFoundation API [--enable-corefoundation]],
+                [tcl_corefoundation=$enableval], [tcl_corefoundation=yes])
+            AC_MSG_RESULT([$tcl_corefoundation])
+            if test $tcl_corefoundation = yes; then
+                AC_CACHE_CHECK([for CoreFoundation.framework], tcl_cv_lib_corefoundation, [
+                    hold_libs=$LIBS
+                    LIBS="$LIBS -framework CoreFoundation"
+                    AC_TRY_LINK([#include <CoreFoundation/CoreFoundation.h>], 
+                        [CFBundleRef b = CFBundleGetMainBundle();], 
+                        tcl_cv_lib_corefoundation=yes, tcl_cv_lib_corefoundation=no)
+                    LIBS=$hold_libs])
+                if test $tcl_cv_lib_corefoundation = yes; then
+                    LIBS="$LIBS -framework CoreFoundation"
+                    AC_DEFINE(HAVE_COREFOUNDATION, 1, 
+                        [Do we have access to Darwin CoreFoundation.framework ?])
+                fi
+	    fi
+	    AC_CHECK_HEADERS(libkern/OSAtomic.h)
+	    AC_CHECK_FUNCS(OSSpinLockLock)
+	    AC_DEFINE(MAC_OSX_TCL, 1, [Is this a Mac I see before me?])
 	    AC_DEFINE(USE_VFORK, 1, [Should we use vfork() instead of fork()?])
 	    AC_DEFINE(TCL_DEFAULT_ENCODING,"utf-8",
 		[Are we to override what our default encoding is?])
 	    AC_DEFINE(MODULE_SCOPE, __private_extern__, [Linker support for module scope symbols])
+	    # prior to Darwin 7, realpath is not threadsafe, so don't
+	    # use it when threads are enabled, c.f. bug # 711232:
+	    AC_CHECK_FUNC(realpath)
+	    if test "$ac_cv_func_realpath" = yes -a "${TCL_THREADS}" = 1 \
+	            -a `uname -r | awk -F. '{print [$]1}'` -lt 7 ; then
+	        ac_cv_func_realpath=no
+	    fi
 	    ;;
 	NEXTSTEP-*)
 	    SHLIB_CFLAGS=""