Do an actual test for xcodebuild, in stead of relying on the user to

uncomment the relevant section.

Author: jackjansen

Mac/OSX/Makefile

@@ -9,10 +9,12 @@ prefix=/Library/Frameworks/Python.framework/Versions/$(VERSION)
 LIBDEST=$(prefix)/lib/python$(VERSION)
 BUILDPYTHON=$(builddir)/python.exe
 DESTDIR=
-# For 10.2:
-#PBXBUILD=pbxbuild
-# For 10.3:
+# Test whether to use xcodebuild (preferred) or pbxbuild:
+ifeq ($(shell ls /usr/bin/xcodebuild),/usr/bin/xcodebuild)
 PBXBUILD=xcodebuild
+else
+PBXBUILD=pbxbuild
+endif
 
 # These are normally glimpsed from the previous set
 bindir=/usr/local/bin