Compiling nginx module with dependant library - mysql

Question

I have followed the tutorial here to build a simple nginx module with success: https://github.com/perusio/nginx-hello-world-module
I can build and run that code with no issue and it functions correctly.
I now want to add a dependancy of MySQL to the simple nginx module so I have used the MySQL C Connector http://dev.mysql.com/doc/refman/5.6/en/c-api-building-clients.html.
The simplest program you can write is this (taken from http://zetcode.com/db/mysqlc/):
mysql_test.c
#include <my_global.h>
#include <mysql.h>
int main(int argc, char **argv)
{
printf("MySQL client version: %s\n", mysql_get_client_info());
exit(0);
}
You then compile like so:
$ gcc mysql_test.c -o mysql_test `mysql_config --cflags --libs`
This works fine.
Now, when I try to include the two header files my_global.h and mysql.h with my simple nginx hello-world module, I need a way of specifying those build flags, else it won't find those header files. At the moment, when I run make, after it successfully builds all other modules, I now get:
cc -c -pipe -O -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs -I src/http -I src/http/modules -I src/mail \
-o objs/addon/nginx-hello-world-module/ngx_http_hello_world_module.o \
/vagrant/nginx-hello-world-module/ngx_http_hello_world_module.c
/vagrant/nginx-hello-world-module/ngx_http_hello_world_module.c:33:23: fatal error: my_global.h: No such file or directory
#include <my_global.h>
^
compilation terminated.
make[1]: *** [objs/addon/nginx-hello-world-module/ngx_http_hello_world_module.o] Error 1
make[1]: Leaving directory `/vagrant/nginx'
make: *** [build] Error 2
My question is: How do I get nginx to include those build flags when building my module?
I haven't found any information regarding the building of dependencies with Nginx.
Thanks!

Answer 1

Compilation Controls
--with-cc-opt=parameters
sets additional parameters that will be added to the CFLAGS variable.
--with-ld-opt=parameters
sets additional parameters that will be used during linking.
Source
For the MySQL Connector C it will be something like:
--with-cc-opt="-I/usr/include/mysql"
--with-ld-opt="-L/usr/lib64/mysql"
And in you module's config file:
CORE_LIBS="$CORE_LIBS -lmysqlclient"
During compilation it might also complain about _GNU_SOURCE being redefined and it will fail if you use -Werror without implementing a workaround.