redhat9 used.
[root@localhost php-4.3.3]./configure --with-apache=../apache_1.3.28 \
--with-mysql=/usr/local/mysql --with-exec-dir=/usr/local/apache/bin \
--with-png-dir=/usr/lib --with-zlib-dir=/usr/lib --with-gd=/usr \
--with-jpeg-dir=/usr/lib --with-freetype-dir=/usr/lib \
--enable-ftp --enable-calendar

[root]@localhost php-4.3.3]make
Build complete.
(It is safe to ignore warnings about tempnam and tmpnam).
this message appear the end of the line.
may ignore?

Is this some kind of error message? More details please, just posting the output of parts of your compile doesn't explain anything really.

tempnam warning message can see on config.log file
/root/php-4.3.3/configure:14411: undefined reference to `crypt'
collect2: ld returned 1 exit status
configure: failed program was:
configure:14389: checking for tempnam
configure:14417: gcc -o conftest -g -O2 conftest.c -lresolv -lm -ldl -lnsl 1>&5
/tmp/cc2TWmfW.o(.text+0xa): In function `main':
/root/php-4.3.3/configure:14411: the use of `tempnam' is dangerous, better use `mkstemp'

'var_unserializer' warning message occurs during run 'make' command on shell prompt.
/root/php-4.3.3/ext/standard/var_unserializer.c: In function `php_var_unserialize':
/root/php-4.3.3/ext/standard/var_unserializer.c:308: warning: comparison is always false due to limited range of data type

looks like you will be fine. just

make install