cd /usr/ports/databases/php5-mysql/
rm -rf work
make

===>  Building for php5-mysql-5.2.1_3
/bin/sh /usr/ports/databases/php5-mysql/work/php-5.2.1/ext/mysql/libtool --mode=compile cc  -I. -I/usr/ports/databases/php5-mysql/work/php-5.2.1/ext/mysql -DPHP_ATOM_INC -I/usr/ports/databases/php5-mysql/work/php-5.2.1/ext/mysql/include -I/usr/ports/databases/php5-mysql/work/php-5.2.1/ext/mysql/main -I/usr/ports/databases/php5-mysql/work/php-5.2.1/ext/mysql -I/usr/local/include/php -I/usr/local/include/php/main -I/usr/local/include/php/TSRM -I/usr/local/include/php/Zend -I/usr/local/include/mysql  -DHAVE_CONFIG_H  -O2 -fno-strict-aliasing -pipe   -c /usr/ports/databases/php5-mysql/work/php-5.2.1/ext/mysql/php_mysql.c -o php_mysql.lo
cc -I. -I/usr/ports/databases/php5-mysql/work/php-5.2.1/ext/mysql -DPHP_ATOM_INC -I/usr/ports/databases/php5-mysql/work/php-5.2.1/ext/mysql/include -I/usr/ports/databases/php5-mysql/work/php-5.2.1/ext/mysql/main -I/usr/ports/databases/php5-mysql/work/php-5.2.1/ext/mysql -I/usr/local/include/php -I/usr/local/include/php/main -I/usr/local/include/php/TSRM -I/usr/local/include/php/Zend -I/usr/local/include/mysql -DHAVE_CONFIG_H -O2 -fno-strict-aliasing -pipe -c /usr/ports/databases/php5-mysql/work/php-5.2.1/ext/mysql/php_mysql.c  -fPIC -DPIC -o php_mysql.lo
/usr/ports/databases/php5-mysql/work/php-5.2.1/ext/mysql/php_mysql.c:120: warning: parameter names (without types) in function declaration
/usr/ports/databases/php5-mysql/work/php-5.2.1/ext/mysql/php_mysql.c:145: error: syntax error before '{' token
/usr/ports/databases/php5-mysql/work/php-5.2.1/ext/mysql/php_mysql.c:145: warning: initialization from incompatible pointer type
/usr/ports/databases/php5-mysql/work/php-5.2.1/ext/mysql/php_mysql.c:146: error: syntax error before '{' token
/usr/ports/databases/php5-mysql/work/php-5.2.1/ext/mysql/php_mysql.c:45:1: unterminated #if
*** Error code 1

Stop in /usr/ports/databases/php5-mysql/work/php-5.2.1/ext/mysql.
*** Error code 1

Stop in /usr/ports/databases/php5-mysql.