8de51b589f
Only do -Wall by default if on GCC (or something that looks like GCC, such as clang/llvm). Turn on -Werror so we can get some better error-checking, but we also need -Wno-deprecated-declarations at least for MacOS, because daemon(3) is deprecated starting with MacOS 10.5. Fixes #174 (I think). Submitted by: @marksolaris