MariaDB has the same bug as MySQL 5.1.50.

With MariaDB 5.1.50 is it not possible to compile php

compilelog:
/usr/include/mysql/my_config.h:1285:1: warning: "PACKAGE_VERSION" redefined
In file included from /var/tmp/portage/dev-lang/php-5.3.3-r1/work/sapis-build/cli/TSRM/tsrm_config.h:1,
from /var/tmp/portage/dev-lang/php-5.3.3-r1/work/sapis-build/cli/TSRM/tsrm_config_common.h:13,
from /var/tmp/portage/dev-lang/php-5.3.3-r1/work/sapis-build/cli/TSRM/tsrm_virtual_cwd.h:26,
from /var/tmp/portage/dev-lang/php-5.3.3-r1/work/sapis-build/cli/main/php.h:410,
from /var/tmp/portage/dev-lang/php-5.3.3-r1/work/sapis-build/cli/ext/mysqli/mysqli_api.c:29:
/var/tmp/portage/dev-lang/php-5.3.3-r1/work/sapis-build/cli/include/../main/php_config.h:2099:1: warning: this is the location of the previous definition
In file included from /var/tmp/portage/dev-lang/php-5.3.3-r1/work/sapis-build/cli/ext/mysqli/php_mysqli_structs.h:57,
from /var/tmp/portage/dev-lang/php-5.3.3-r1/work/sapis-build/cli/ext/mysqli/mysqli_api.c:33:
/usr/include/mysql/my_global.h:650:25: error: my_compiler.h: No such file or directory
make: *** [ext/mysqli/mysqli.lo] Fehler 1

here the MySQL bug:
http://bugs.mysql.com/bug.php?id=55846

report for Gentoo:
http://bugs.gentoo.org/show_bug.cgi?id=341853