* macosx/tclMacOSXNotify.c (Tcl_InitNotifier, Tcl_WaitForEvent): create

	notifier thread lazily upon first call to Tcl_WaitForEvent() rather than
	in Tcl_InitNotifier(). Allows calling exeve() in processes where the
	event loop has not yet been run (Darwin's execve() fails in processes
	with more than one thread), in particular allows embedders to call
	fork() followed by execve(), previously the pthread_atfork() child
	handler's call to Tcl_InitNotifier() would immediately recreate the
	notifier thread in the child after a fork.

	* macosx/tclMacOSXFCmd.c (TclMacOSXCopyFileAttributes):    add support
	* macosx/tclMacOSXNotify.c (Tcl_InitNotifier):             for weakly
	* unix/tclUnixInit.c (Tcl_GetEncodingNameFromEnvironment): importing
	symbols not available on OSX 10.2 or 10.3, enables binaires built on
	later OSX versions to run on earlier ones.
	* macosx/Tcl.xcodeproj/project.pbxproj: enable weak-linking; turn on
	                                        extra warnings.
	* macosx/README: document how to enable weak-linking; cleanup.
	* unix/tclUnixPort.h: add support for weak-linking; conditionalize
	AvailabilityMacros.h inclusion; only disable realpath on 10.2 or earlier
	when threads are enabled.
	* unix/tclLoadDyld.c (TclpLoadMemoryGetBuffer): change runtime Darwin
	* unix/tclUnixInit.c (TclpInitPlatform):        release check to use
	                                                global initialized once.
	* unix/tclUnixFCmd.c (DoRenameFile, TclpObjNormalizePath): add runtime
	Darwin release check to determine if realpath is threadsafe.
	* unix/configure.in: add check on Darwin for compiler support of weak
	* unix/tcl.m4:       import and for AvailabilityMacros.h header;
	move Darwin specific checks & defines that are only relevant to the tcl
	build out of tcl.m4; restrict framework option to Darwin; cleanup
	quoting and help messages.
	* unix/configure: autoconf-2.59
	* unix/tclConfig.h.in: autoheader-2.59

	* unix/tclLoadDyld.c (TclpLoadMemory): fix signed-with-unsigned
	comparison and other warnings from gcc4 -Wextra.

1 files changed, 44 insertions, 59 deletions

diff --git a/unix/tcl.m4 b/unix/tcl.m4
index 3b2e228..e009b9b 100644
--- a/unix/tcl.m4
+++ b/unix/tcl.m4
@@ -560,33 +560,33 @@ AC_DEFUN([SC_ENABLE_SHARED], [
 #------------------------------------------------------------------------
 
 AC_DEFUN([SC_ENABLE_FRAMEWORK], [
-    AC_MSG_CHECKING([how to package libraries])
-    AC_ARG_ENABLE(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
-	enableval="$enable_framework"
-	tcl_ok=$enableval
-    else
-	tcl_ok=no
-    fi
-
-    if test "$tcl_ok" = "yes" ; then
-	AC_MSG_RESULT([framework])
-	FRAMEWORK_BUILD=1
-	if test "${SHARED_BUILD}" = "0" ; then
-	    AC_MSG_WARN([Frameworks can only be built if --enable-shared is yes])
-	    FRAMEWORK_BUILD=0
+    if test "`uname -s`" = "Darwin" ; then
+	AC_MSG_CHECKING([how to package libraries])
+	AC_ARG_ENABLE(framework,
+	    AC_HELP_STRING([--enable-framework],
+		[package shared libraries in MacOSX frameworks (default: off)]),
+	    [enable_framework=$enableval], [enable_framework=no])
+	if test $enable_framework = yes; then
+	    if test $SHARED_BUILD = 0; then
+		AC_MSG_WARN([Frameworks can only be built if --enable-shared is yes])
+		enable_framework=no
+	    fi
+	    if test $tcl_corefoundation = no; then
+		AC_MSG_WARN([Frameworks can only be used when CoreFoundation is available])
+		enable_framework=no
+	    fi
 	fi
-	if test $tcl_corefoundation = no; then
-	    AC_MSG_WARN([Frameworks can only be used when CoreFoundation is available])
+	if test $enable_framework = yes; then
+	    AC_MSG_RESULT([framework])
+	    FRAMEWORK_BUILD=1
+	else
+	    if test $SHARED_BUILD = 1; then
+		AC_MSG_RESULT([shared library])
+	    else
+		AC_MSG_RESULT([static library])
+	    fi
 	    FRAMEWORK_BUILD=0
 	fi
-    else
-	AC_MSG_RESULT([standard shared library])
-	FRAMEWORK_BUILD=0
     fi
 ])
 
@@ -683,10 +683,10 @@ AC_DEFUN([SC_ENABLE_THREADS], [
 	    AC_DEFINE(HAVE_PTHREAD_ATTR_GET_NP, 1,
 		[Do we want a BSD-like thread-attribute interface?])
 	    AC_CACHE_CHECK([for pthread_attr_get_np declaration],
-		tcl_cv_grep_pthread_attr_get_np,
+		tcl_cv_grep_pthread_attr_get_np, [
 		AC_EGREP_HEADER(pthread_attr_get_np, pthread.h,
 		    tcl_cv_grep_pthread_attr_get_np=present,
-		    tcl_cv_grep_pthread_attr_get_np=missing))
+		    tcl_cv_grep_pthread_attr_get_np=missing)])
 	    if test $tcl_cv_grep_pthread_attr_get_np = missing ; then
 		AC_DEFINE(ATTRGETNP_NOT_DECLARED, 1,
 		    [Is pthread_attr_get_np() declared in <pthread.h>?])
@@ -697,10 +697,10 @@ AC_DEFUN([SC_ENABLE_THREADS], [
 		AC_DEFINE(HAVE_PTHREAD_GETATTR_NP, 1,
 		    [Do we want a Linux-like thread-attribute interface?])
 		AC_CACHE_CHECK([for pthread_getattr_np declaration],
-		    tcl_cv_grep_pthread_getattr_np,
+		    tcl_cv_grep_pthread_getattr_np, [
 		    AC_EGREP_HEADER(pthread_getattr_np, pthread.h,
 			tcl_cv_grep_pthread_getattr_np=present,
-			tcl_cv_grep_pthread_getattr_np=missing))
+			tcl_cv_grep_pthread_getattr_np=missing)])
 		if test $tcl_cv_grep_pthread_getattr_np = missing ; then
 		    AC_DEFINE(GETATTRNP_NOT_DECLARED, 1,
 			[Is pthread_getattr_np declared in <pthread.h>?])
@@ -1596,7 +1596,7 @@ dnl AC_CHECK_TOOL(AR, ar)
 	    AC_MSG_CHECKING([whether to use CoreFoundation])
 	    AC_ARG_ENABLE(corefoundation,
 		AC_HELP_STRING([--enable-corefoundation],
-		    [use CoreFoundation API on MacOSX (default: yes)]),
+		    [use CoreFoundation API on MacOSX (default: on)]),
 		[tcl_corefoundation=$enableval], [tcl_corefoundation=yes])
 	    AC_MSG_RESULT([$tcl_corefoundation])
 	    if test $tcl_corefoundation = yes; then
@@ -1616,29 +1616,14 @@ dnl AC_CHECK_TOOL(AR, ar)
 		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 ?])
-		    AC_CHECK_HEADERS(libkern/OSAtomic.h)
-		    AC_CHECK_FUNCS(OSSpinLockLock)
-		    AC_CHECK_FUNCS(pthread_atfork)
+			[Do we have access to Darwin CoreFoundation.framework?])
+		else
+		    tcl_corefoundation=no
 		fi
 	    fi
-	    AC_CHECK_HEADERS(copyfile.h)
-	    AC_CHECK_FUNCS(copyfile)
 	    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])
-	    AC_DEFINE(TCL_LOAD_FROM_MEMORY, 1,
-		[Can this platform load code from memory?])
-	    # 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=""
@@ -1912,8 +1897,8 @@ dnl AC_CHECK_TOOL(AR, ar)
     # Step 4: disable dynamic loading if requested via a command-line switch.
 
     AC_ARG_ENABLE(load,
-	AC_HELP_STRING([--disable-load],
-	    [disallow dynamic loading and "load" command (default: enabled)]),
+	AC_HELP_STRING([--enable-load],
+	    [allow dynamic loading and "load" command (default: on)]),
 	[tcl_ok=$enableval], [tcl_ok=yes])
     if test "$tcl_ok" = "no"; then
 	DL_OBJS=""
@@ -2202,7 +2187,7 @@ int main() {
 #--------------------------------------------------------------------
 
 AC_DEFUN([SC_MISSING_POSIX_HEADERS], [
-    AC_CACHE_CHECK([dirent.h], tcl_cv_dirent_h,
+    AC_CACHE_CHECK([dirent.h], tcl_cv_dirent_h, [
     AC_TRY_LINK([#include <sys/types.h>
 #include <dirent.h>], [
 #ifndef _POSIX_SOURCE
@@ -2222,7 +2207,7 @@ d = opendir("foobar");
 entryPtr = readdir(d);
 p = entryPtr->d_name;
 closedir(d);
-], tcl_cv_dirent_h=yes, tcl_cv_dirent_h=no))
+], tcl_cv_dirent_h=yes, tcl_cv_dirent_h=no)])
 
     if test $tcl_cv_dirent_h = no; then
 	AC_DEFINE(NO_DIRENT_H, 1, [Do we have <dirent.h>?])
@@ -2416,16 +2401,16 @@ AC_DEFUN([SC_TIME_HANDLER], [
 
     AC_CHECK_FUNCS(gmtime_r localtime_r mktime)
 
-    AC_CACHE_CHECK([tm_tzadj in struct tm], tcl_cv_member_tm_tzadj,
+    AC_CACHE_CHECK([tm_tzadj in struct tm], tcl_cv_member_tm_tzadj, [
 	AC_TRY_COMPILE([#include <time.h>], [struct tm tm; tm.tm_tzadj;],
-	    tcl_cv_member_tm_tzadj=yes, tcl_cv_member_tm_tzadj=no))
+	    tcl_cv_member_tm_tzadj=yes, tcl_cv_member_tm_tzadj=no)])
     if test $tcl_cv_member_tm_tzadj = yes ; then
 	AC_DEFINE(HAVE_TM_TZADJ, 1, [Should we use the tm_tzadj field of struct tm?])
     fi
 
-    AC_CACHE_CHECK([tm_gmtoff in struct tm], tcl_cv_member_tm_gmtoff,
+    AC_CACHE_CHECK([tm_gmtoff in struct tm], tcl_cv_member_tm_gmtoff, [
 	AC_TRY_COMPILE([#include <time.h>], [struct tm tm; tm.tm_gmtoff;],
-	    tcl_cv_member_tm_gmtoff=yes, tcl_cv_member_tm_gmtoff=no))
+	    tcl_cv_member_tm_gmtoff=yes, tcl_cv_member_tm_gmtoff=no)])
     if test $tcl_cv_member_tm_gmtoff = yes ; then
 	AC_DEFINE(HAVE_TM_GMTOFF, 1, [Should we use the tm_gmtoff field of struct tm?])
     fi
@@ -2434,24 +2419,24 @@ AC_DEFUN([SC_TIME_HANDLER], [
     # Its important to include time.h in this check, as some systems
     # (like convex) have timezone functions, etc.
     #
-    AC_CACHE_CHECK([long timezone variable], tcl_cv_timezone_long,
+    AC_CACHE_CHECK([long timezone variable], tcl_cv_timezone_long, [
 	AC_TRY_COMPILE([#include <time.h>],
 	    [extern long timezone;
 	    timezone += 1;
 	    exit (0);],
-	    tcl_cv_timezone_long=yes, tcl_cv_timezone_long=no))
+	    tcl_cv_timezone_long=yes, tcl_cv_timezone_long=no)])
     if test $tcl_cv_timezone_long = yes ; then
 	AC_DEFINE(HAVE_TIMEZONE_VAR, 1, [Should we use the global timezone variable?])
     else
 	#
 	# On some systems (eg IRIX 6.2), timezone is a time_t and not a long.
 	#
-	AC_CACHE_CHECK([time_t timezone variable], tcl_cv_timezone_time,
+	AC_CACHE_CHECK([time_t timezone variable], tcl_cv_timezone_time, [
 	    AC_TRY_COMPILE([#include <time.h>],
 		[extern time_t timezone;
 		timezone += 1;
 		exit (0);],
-		tcl_cv_timezone_time=yes, tcl_cv_timezone_time=no))
+		tcl_cv_timezone_time=yes, tcl_cv_timezone_time=no)])
 	if test $tcl_cv_timezone_time = yes ; then
 	    AC_DEFINE(HAVE_TIMEZONE_VAR, 1, [Should we use the global timezone variable?])
 	fi