adding static library via module

I am trying to install a module "NGINX-RTMP-module" with my own static library "libmine.a"
in "conf" file i have added
"CFLAGS="$CFLAGS -I$ngx_addon_dir -L$ngx_addon_dir/mylibdir/ -lmine"
but linker is not getting this library.
how can i fix this ?
Thanks