Hi,
I've installed the Xcode 10 beta, including the command line tools and the MacOSX10.14 SDK, on my machine with an otherwise blank macOS 10.14 beta, but I don't have a /usr/include directory. Is this on purpose, am I missing something or is something broken? This makes it quite difficult to build a lot of open source projects.
From the latest Xcode 10 Beta 2 release notes.
The Command Line Tools package installs the macOS system headers inside the macOS SDK. Software that compiles with the installed tools will search for macOS headers at the standard include path: /Applications/Xcodebeta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.1 4.sdk/usr/include For legacy software that looks for the macOS headers in the base system under /usr/include, please install the package file located at: /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14. pkg