Lastnight I updated my iPhone to iOS 6.1, my current version of xcode wouldn\'t build to the phone as I needed the newest version.
I went from xcode 4.5.2 to xcode 4
add: $SDKROOT/usr/include/libxml2
In Xcode6 and latest versions add this to your Header Search Paths:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/libxml2
and remember to add the search path also to the test target.
I upgraded libxml2 on my mac and then:
If you need to have libxml2 first in your PATH run:
echo 'export PATH="/usr/local/opt/libxml2/bin:$PATH"' >> ~/.zshrc
For compilers to find libxml2 you may need to set:
export LDFLAGS="-L/usr/local/opt/libxml2/lib"
export CPPFLAGS="-I/usr/local/opt/libxml2/include"
For pkg-config to find libxml2 you may need to set:
export PKG_CONFIG_PATH="/usr/local/opt/libxml2/lib/pkgconfig"
For me what worked was adding this to header search path:
$(SDKROOT)/usr/include/libxml2
Slightly difference from other answer, probably to do with newer version of Xcode.
In your build settings, add the following to your Header Search Paths:
$SDKROOT/usr/include/libxml2