TestCModules is failing on OSX when running "expr @import Darwin; 3": runCmd: expr @import Darwin; 3 runCmd failed! error: import of C++ module 'Darwin.machine.types' appears within extern "C" language linkage specification extern "C" language linkage specification begins here import of C++ module 'Darwin.cdefs' appears within extern "C" language linkage specification extern "C" language linkage specification begins here import of C++ module 'Darwin.POSIX.sys.types._int8_t' appears within extern "C" language linkage specification extern "C" language linkage specification begins here import of C++ module 'Darwin.POSIX.sys.types._int8_t' appears within extern "C" language linkage specification extern "C" language linkage specification begins here import of C++ module 'Darwin.POSIX.sys.types._int16_t' appears within extern "C" language linkage specification extern "C" language linkage specification begins here import of C++ module 'Darwin.POSIX.sys.types._int16_t' appears within extern "C" language linkage specification extern "C" language linkage specification begins here import of C++ module 'Darwin.POSIX.sys.types._int32_t' appears within extern "C" language linkage specification extern "C" language linkage specification begins here import of C++ module 'Darwin.POSIX.sys.types._int32_t' appears within extern "C" language linkage specification extern "C" language linkage specification begins here import of C++ module 'Darwin.POSIX.sys.types._int64_t' appears within extern "C" language linkage specification extern "C" language linkage specification begins here import of C++ module 'Darwin.POSIX.sys.types._int64_t' appears within extern "C" language linkage specification extern "C" language linkage specification begins here import of C++ module 'Darwin.POSIX.sys.types._intptr_t' appears within extern "C" language linkage specification extern "C" language linkage specification begins here import of C++ module 'Darwin.POSIX.sys.types._intptr_t' appears within extern "C" language linkage specification extern "C" language linkage specification begins here import of C++ module 'Darwin.POSIX.sys.types._uintptr_t' appears within extern "C" language linkage specification extern "C" language linkage specification begins here import of C++ module 'Darwin.POSIX.sys.types._uintptr_t' appears within extern "C" language linkage specification extern "C" language linkage specification begins here import of C++ module 'Darwin.machine.types' appears within extern "C" language linkage specification extern "C" language linkage specification begins here import of C++ module 'Darwin.POSIX.sys.types._dev_t' appears within extern "C" language linkage specification extern "C" language linkage specification begins here import of C++ module 'Darwin.POSIX.sys.types._dev_t' appears within extern "C" language linkage specification extern "C" language linkage specification begins here import of C++ module 'Darwin.POSIX.sys.types._mode_t' appears within extern "C" language linkage specification extern "C" language linkage specification begins here import of C++ module 'Darwin.POSIX.sys.types._mode_t' appears within extern "C" language linkage specification extern "C" language linkage specification begins here too many errors emitted, stopping now could not build module 'Darwin' error: Couldn't load top-level module Darwin error: 1 errors parsing expression