problem installing

hello, I have run into some problems and do not understand what is wrong. Could someone please help. I am going through the INSTALL text and I got to make and I recieve the following message. Making all in libzend make[1]: Entering directory '/usr/local/php-4.0b2/libzend' make[1]: *** No rule to make target 'all'. Stop. make[1]: Leaving directory '/usr/local/php-4.0b2/libzend' #what does No rule to make target 'all'. Stop Making all in ext make[1] Entering directory '/usr/local/php-4.0b2/ext' Making all in apache make[2]:Entering directory '/usr/local/php-4.0b2/ext/apache' gcc -DHAVE_CONFIG_H -I. -I. -I../.. -I../../libzend -I../../TSRM -I/usr/local/ph p-4.0b2/ ../apache_1.3.6/src/include -I/usr/local/php-4.0b2/ ../apache_1.3.6/src/o s/unix -I/usr/local/mysql/include/mysql -I../.. -I../../libzend -g -02 -g -02 -c apache.c In file included from ../../php.h:36, from apache.c22: ../../libzend/zend.h:45: zend_config.h: No such file or directory #There is no file called zend_config.h but there is one called zend_config.h.in. What does the .in mean? make[2]: *** [apache.o] Error1 make[2]: Leaving directory '/usr/local/php-4.0b2/ext/apache' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory '/usr/local/php-4.0b2/ext' make: *** [all-recursive] Error 1