./crypto.h:267:21: error: unknown type name 'size_t'
./crypto.h:342:33: error: unknown type name 'time_t'
./crypto.h:389:25: error: unknown type name 'uint64_t'
Can you please provide a reduce test case? Also include which platform, which version of DStep (dstep --version) and which version of Clang you're using (dstep --clang-version).