php-4.3.3 tar.gz install .
 

[root@localhost php-4.3.3]#make
/root/php-4.3.3/ext/gd/gdttf.c: In function `gdttfchar':
/root/php-4.3.3/ext/gd/gdttf.c:749: warning: assignment from incompatible pointer type
.......
.......
Build complete.
(It is safe to ignore warnings about tempnam and tmpnam).

why this message is appear??

just a guess, but I'd say your compiler didn't quite expect to see the code written the way it was in that file. It happens sometimes with new compilers and old code, and more commonly with new code and slightly older compilers. If it didn't puke out totally, you're probably safe to ignore; especially if you're not going to use the gd fucnctionality in PHP.