Hi, When I tried to compile notmuch under Mac OS X 10.6, several issues arisen: 1. g++ reports 'warning: command line option "-Wmissing-declarations" is valid for C/ObjC but not for C++' 2. notmuch-reply.c: In function ‘address_is_users’: notmuch-reply.c:87: warning: passing argument 2 of ‘notmuch_config_get_user_other_email’ from incompatible pointer type That's due to the size incompatibility of 'unsigned int' and 'size_t' (size_t is uint64_t in Mac OS X). 3. Several errors about missing GNU extensions like getline() and strndup(): warning: implicit declaration of function ‘getline’ error: ‘strndup’ was not declared in this scope We can implement these with fgets() and strncpy() though. - Jiang