Error while building own nginx module

Hi

i have written own nginx module and i have many header ,src and
makefiles
files .

my nginx module folder structure look like below

/product/src/nginx/ngx_http_auth_module.cpp
/product/src/nginx/Makefile
/product/src/nginx/config(nginx config file)
/product/src/common/.cpp files
/product/lib/.so files
/product/src/utility/.c and .h files

i have written my config file like this


ngx_module_type=HTTP_AUX_FILTER_MODULES
ngx_module_name=ngx_http_auth_module
ngx_module_incs=$ngx_addon_dir
ngx_module_deps=
ngx_module_srcs=$ngx_addon_dir/ngx_http_auth_module.cpp
$ngx_addon_dir/Makefile

ngx_module_libs=

. auto/module


code build successfully and generated ngx_http_auth_module.so file
but
not correctly since i am getting below error while loading in
nginx.conf
file.

nginx: [emerg] dlopen()
“/usr/local/nginx/modules/ngx_http_auth_module.so”
failed (/usr/local/nginx/modules/ngx_http_auth_module.so: undefined
symbol:
ngx_http_auth_module

Please let me know correct way to do.

Thanks & Regards,
Pankaj Chaudhary