Yes, I did set this. These are the first few lines of this file:
%define LDAP 2
%define MYSQL 1
%define PCRE 1
%define SASL 2
%define TLS 1
%define IPV6 1
%define POSTDROP_GID 90
%define PFLOGSUMM 1
I think you can even recognize it by what I posted before (I guess):
gcc -Wmissing-prototypes [........] -DHAS_MYSQL -I/usr/include/mysql ......
And I did check the rest of the file again. And I didn't find anything wrong.