in redhat linux 7.1. 

I downloaded httpd-2_0_28 from apache, php-4.0.6 from php.net.

the php configure script searches .../httpd-2_0_28/src/include/ for include files while actually those header files are at .../httpd-2_0_28/include/.

but after I made a directory called .../httpd-2_0_28/src and moved everything in it, it still fails with these errors:

In file included from /usr/local/src/httpd-2_0_28/src/include/httpd.h:72,
                 from sapi_apache.c:32:
/usr/local/src/httpd-2_0_28/src/include/ap_config.h:60:32: apr_optional_hooks.h:
 No such file or directory
In file included from sapi_apache.c:32:
/usr/local/src/httpd-2_0_28/src/include/httpd.h:657:21: apr_uri.h: No such file
or directory
make[3]: *** [sapi_apache.lo] Error 1
make[3]: Leaving directory `/usr/local/src/php-4.0.6/sapi/apache'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/usr/local/src/php-4.0.6/sapi/apache'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/usr/local/src/php-4.0.6/sapi'
make: *** [all-recursive] Error 1