diff --git a/rules/dll.rb b/rules/dll.rb
index ccd13ee9e..2a51ab0e9 100644
--- a/rules/dll.rb
+++ b/rules/dll.rb
@@ -26,7 +26,7 @@ def initialize(work, name, objects, whole_libs, libs, linkflags, linker)
 		#puts "libflags: #{libflags}"
 		if(whole_libs.size > 0)
 			if(HOST == :darwin)
-				libflags += " #{whole_libs.join(' ')} -m32"
+				libflags += " #{whole_libs.join(' ')}"
 			else
 				libflags += " -Wl,--whole-archive #{whole_libs.join(' ')} -Wl,--no-whole-archive"
 			end
diff --git a/rules/gcc_flags.rb b/rules/gcc_flags.rb
index a4ecd366b..80f286054 100644
--- a/rules/gcc_flags.rb
+++ b/rules/gcc_flags.rb
@@ -102,18 +102,18 @@ def define_cflags
 	@HOST_FLAGS = " -DLINUX -fPIC"
 	if(HOST_PLATFORM == :darwin)
 		sdkNumber = (File.exist?("/Developer/SDKs/MacOSX10.5.sdk")) ? "5":"6"
-		sdkAdress = "/Developer/SDKs/MacOSX10.#{sdkNumber}.sdk"
-		@HOST_FLAGS += " -isysroot #{sdkAdress} -mmacosx-version-min=10.5 -m32 -DDARWIN"
+    sdkAdress = "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk"
+    @HOST_FLAGS = " -isysroot #{sdkAdress} -mmacosx-version-min=10.5 -DDARWIN"
 	end
 	@HOST_CPPFLAGS = ""
 elsif(HOST == :darwin)
 	sdkAdress = "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk"
 	if(!File.exist?(sdkAdress))
 		sdkNumber = (File.exist?("/Developer/SDKs/MacOSX10.5.sdk")) ? "5":"6"
-		sdkAdress = "/Developer/SDKs/MacOSX10.#{sdkNumber}.sdk"
+    sdkAdress = "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk"
 	end
-	@HOST_FLAGS = " -isysroot #{sdkAdress} -mmacosx-version-min=10.5 -m32 -DDARWIN"
-	@HOST_CPPFLAGS = " -isysroot #{sdkAdress} -mmacosx-version-min=10.5 -m32 -fPIC"
+  @HOST_FLAGS = " -isysroot #{sdkAdress} -mmacosx-version-min=10.5 -DDARWIN"
+  @HOST_CPPFLAGS = " -isysroot #{sdkAdress} -mmacosx-version-min=10.5 -fPIC"
 else
 	error "Unsupported host: #{HOST}"
 end
diff --git a/rules/native_link.rb b/rules/native_link.rb
index ccdf2ba32..a88b64c94 100644
--- a/rules/native_link.rb
+++ b/rules/native_link.rb
@@ -56,7 +56,7 @@ class NativeGccLinkWork < NativeGccWork
 
 	def setup3(all_objects, have_cppfiles)
 		if(HOST == :darwin)
-			@EXTRA_LINKFLAGS += " -m32 -L/sw/lib -L/opt/local/lib -framework Cocoa -framework IOBluetooth -framework Foundation"
+			@EXTRA_LINKFLAGS += " -L/sw/lib -L/opt/local/lib -framework Cocoa -framework IOBluetooth -framework Foundation"
 		end
 		if(PROFILING)
 			@EXTRA_LINKFLAGS += " -pg"
diff --git a/runtimes/cpp/platforms/iphone/buildLibraries.rb b/runtimes/cpp/platforms/iphone/buildLibraries.rb
index 9fc228eb9..ddbe0bedb 100755
--- a/runtimes/cpp/platforms/iphone/buildLibraries.rb
+++ b/runtimes/cpp/platforms/iphone/buildLibraries.rb
@@ -37,10 +37,10 @@
 end
 
 # build everything
-sh "#{xcodebuild} -target MoSyncLib -configuration Debug  -sdk iphoneos -project MoSync.xcodeproj"
-sh "#{xcodebuild} -target MoSyncLib -configuration Release -sdk iphoneos -project MoSync.xcodeproj"
-sh "#{xcodebuild} -target MoSyncLib -configuration Debug  -sdk iphonesimulator -project MoSync.xcodeproj"
-sh "#{xcodebuild} -target MoSyncLib -configuration Release -sdk iphonesimulator -project MoSync.xcodeproj"
+sh "xcodebuild -target MoSyncLib -configuration Debug  -sdk iphoneos -project MoSync.xcodeproj"
+sh "xcodebuild -target MoSyncLib -configuration Release -sdk iphoneos -project MoSync.xcodeproj"
+sh "xcodebuild -target MoSyncLib -configuration Debug  -sdk iphonesimulator -project MoSync.xcodeproj"
+sh "xcodebuild -target MoSyncLib -configuration Release -sdk iphonesimulator -project MoSync.xcodeproj"g
 #sh "/Developer/usr/bin/xcodebuild -target MoSyncLib -configuration Debug  -sdk iphoneos3.2 -project MoSync.xcodeproj"
 #sh "/Developer/usr/bin/xcodebuild -target MoSyncLib -configuration Release -sdk iphoneos3.2 -project MoSync.xcodeproj"
 #sh "/Developer/usr/bin/xcodebuild -target MoSyncLib -configuration Debug  -sdk iphonesimulator3.2 -project MoSync.xcodeproj"