Compilation errors

We list common PHP compilation error messages and their solution here.

MySQL

configure: error: Cannot find MySQL header files under yes.

Debian 7:

$ apt-get install libmysqlclient-dev

Libltdl

/usr/bin/ld: cannot find -lltdl
collect2: error: ld returned 1 exit status
make: *** [sapi/cgi/php-cgi] Error 1
make failed.

Debian 7:

$ apt-get install libltdl-dev

SSL

Happens with 5.2.17 on Debian 7:

ext/openssl/.libs/xp_ssl.o: In function `php_openssl_setup_crypto':
ext/openssl/xp_ssl.c:357: undefined reference to `SSLv2_server_method'
ext/openssl/xp_ssl.c:337: undefined reference to `SSLv2_client_method'

You need the patch from PHP bug #54736 here.

[Sidney Harrell]

For the Mysql error: The make clean line in compile.sh is commented out, so if you compiled before installing the headers, you may need to go into the php source folder and manually make clean. (stackoverflow thread)