Installation of midgard-php4-1.7.4

Dear All,

I am new to php and midgard and installating Midgard 1.7.4.

When I run ./mkall in order to configure new installation of midgard-php4-
1.7.4, there is an error as below:

[midgard <at> tts midgard-php4-1.7.4]$ ./mkall
./mkall: line 20: phpize: command not found
./mkall: line 34: ./configure: No such file or directory
make: *** No targets specified and no makefile found.  Stop.
make: *** No rule to make target `install'.  Stop.

I don't have idea what 'phpize' is.  Anyone can give me some information and 
hint.  Thanks.