Update to tk 8.5.19

unix/configure.in

@@ -25,7 +25,7 @@ m4_ifdef([SC_USE_CONFIG_HEADERS], [
 TK_VERSION=8.5
 TK_MAJOR_VERSION=8
 TK_MINOR_VERSION=5
-TK_PATCH_LEVEL=".15"
+TK_PATCH_LEVEL=".19"
 VERSION=${TK_VERSION}
 LOCALES="cs da de el en en_gb eo es fr hu it nl pl pt ru sv"
 
@@ -365,7 +365,7 @@ fi
 if test $tk_aqua = yes; then
     AC_DEFINE(MAC_OSX_TK, 1, [Are we building TkAqua?])
     LIBS="$LIBS -framework Cocoa -framework Carbon -framework IOKit"
-    EXTRA_CC_SWITCHES='-std=gnu99 -x objective-c -fobjc-gc'
+    EXTRA_CC_SWITCHES='-std=gnu99 -x objective-c'
     TK_WINDOWINGSYSTEM=AQUA
     if test -n "${enable_symbols}" -a "${enable_symbols}" != no; then
         AC_DEFINE(TK_MAC_DEBUG, 1, [Are TkAqua debug messages enabled?])
@@ -509,6 +509,18 @@ if test $tk_aqua = no; then
 	    CFLAGS=$tk_oldCFlags
 	    LIBS=$tk_oldLibs
 	fi
+	dnl make sure that linking against fontconfig libraries finds Fc* symbols
+	if test "$found_xft" = "yes" ; then
+	    tk_oldCFlags=$CFLAGS
+	    CFLAGS="$CFLAGS $XINCLUDES $XFT_CFLAGS"
+	    tk_oldLibs=$LIBS
+	    LIBS="$tk_oldLIBS $XFT_LIBS $XLIBSW -lfontconfig"
+	    AC_CHECK_LIB(fontconfig, FcFontSort, [
+		XFT_LIBS="$XFT_LIBS -lfontconfig"
+	    ], [])
+	    CFLAGS=$tk_oldCFlags
+	    LIBS=$tk_oldLibs
+	fi
 	dnl print a warning if xft is unusable and was specifically requested
 	if test "$found_xft" = "no" ; then
 	    if test "$enable_xft" = "yes" ; then