Why am I getting this “libxml/tree.h file not found” error?

Question

I just installed Xcode version 4.3.1 and I get this error:

libxml / tree.h file not found

I have also installed Xcode 4.2, and

Answer 1

2 solutions:

1. header search path should be updated with SDK root as such: $(SDKROOT)/usr/include/libxml2
2. Install command line tools for XCode 5 from terminal by entering: xcode-select --install XCode 4 should have the command line tools install option in preferences>downloads section.

I'd personally go with the second one.