build fix for Xcode 4.3.

NOT: this *only* builds on Xcode 4.3 now. for older Xcodes, use an older revision.

boost.sh

@@ -107,7 +107,11 @@ unpackBoost()
 patchBoost()
 {
     echo Patching boost...
-    ( cd $BOOST_SRC; patch -p1 < $TARBALLDIR/fusion_nil_.diff; patch -p1 < $TARBALLDIR/fusion_nil_2.diff )
+    ( cd $BOOST_SRC; 
+        patch -p1 < $TARBALLDIR/fusion_nil_.diff;
+        patch -p1 < $TARBALLDIR/fusion_nil_2.diff;
+        patch -p1 < $TARBALLDIR/xcode_43.diff
+    )
     doneSection
 }
 

xcode_43.diff

@@ -0,0 +1,37 @@
+--- a/tools/build/v2/tools/darwin.jam	2011-06-06 22:36:21.000000000 +0200
++++ b/tools/build/v2/tools/darwin.jam	2012-03-15 18:14:22.000000000 +0100
+@@ -70,7 +70,7 @@
+ #
+ #   <root>PATH
+ #       Platform root path. The common autodetection will set this to
+-#       "/Developer". And when a command is given it will be set to
++#       "/Applications/Xcode.app/Contents/Developer". And when a command is given it will be set to
+ #       the corresponding "*.platform/Developer" directory.
+ #
+ rule init ( version ? : command * : options * : requirement * )
+@@ -104,7 +104,7 @@
+         bin ?= [ common.get-absolute-tool-path $(command[1]) ] ;
+         if $(bin) = "/usr/bin"
+         {
+-            root ?= /Developer ;
++            root ?= /Applications/Xcode.app/Contents/Developer ;
+         }
+         else
+         {
+@@ -312,9 +312,13 @@
+ # Determine the MacOSX SDK versions installed and their locations.
+ local rule init-available-sdk-versions ( condition * : root ? )
+ {
+-    root ?= /Developer ;
+-    local sdks-root = $(root)/SDKs ;
+-    local sdks = [ GLOB $(sdks-root) : MacOSX*.sdk iPhoneOS*.sdk iPhoneSimulator*.sdk ] ;
++    root ?= /Applications/Xcode.app/Contents/Developer ;
++    local platforms = [ GLOB /Applications/Xcode.app/Contents/Developer/Platforms : *.platform ] ;
++    local sdks = ;
++    for local platform in $(platforms)
++    {
++        sdks += [ GLOB $(platform)/Developer/SDKs : *.sdk ] ;
++    }
+     local result ;
+     for local sdk in $(sdks)
+     {