Please let me know the procedure to compile the mod_proxy_add_forward.c module.
Version details of apache : apache_1.3.28
Please note that not only is 1.3 "End Of Life" and unsupported, but 1.3.28 is from a *seriously* long time ago. If you really feel compelled to use 1.3 for some reason, please at least use a version that was released more recently.