hi, I have found messages of others having the same problem but not a good answer...
my config : Debian potato apache-perl mysql 3.23.33 (binaries) I have this at php-4.0.5 configure : ./configure \ --with-apx=/usr/sbin/apx \ --with-config-file-path=/etc/apache \ --enable-versioning \ --with-mysql=/usr/local/mysql and make ends with : /usr/local/mysql/lib/libmysqlclient.a(my_compress.o): In function `my_uncompress': my_compress.o(.text+0x9a): undefined reference to `uncompress' /usr/local/mysql/lib/libmysqlclient.a(my_compress.o): In function `my_compress_alloc': my_compress.o(.text+0x12a): undefined reference to `compress' collect2: ld returned 1 exit status make[1]: *** [php] Error 1 make[1]: Leaving directory `/home/alexis/php-4.0.5' make: *** [all-recursive] Error 1 I tried the same after installing zlib1 and zlib1g-dev --> same message. Compile with PHP's built-in MySQL support (whithout mysql path) seems to work, but I will have to use mod_auth_mysql so I would like to find an answer to this problem. Thanx for any help, have fun, Alexis