Fix a Windows compile error after commit c4b0e2b. MSVC doesn't accept: void bpf_error (compiler_state_t *, const char *, ...) __declspec (noreturn); It has to be: void __declspec (noreturn) bpf_error (compiler_state_t *, const char *, ...); BTW. MinGW, gcc 5.1 accepts both forms.