I'm trying to buid XMP SDK on macOS. After resolving few issues that should have been automated/fixed by Adobe (such as not recognizing clang compiler version automatically, using GNU libstdc++ etc.), I'm stuck with a compiler error:
XMP-Toolkit-SDK-CC201607/public/include/XMPCommon/XMPCommonDefines.h:25:14: fatal error: 'ciso646' file not found
#include <ciso646>
Is there any known way to fix it? (I cannot install XCode 9)