When I compile with the bcmath config turned on, I get the following error: 

                      zend_operators.c: In function `zendi_smart_strcmp': 
                      zend_operators.c:1302: `bc_num' undeclared (first use in this function) 
                      zend_operators.c:1302: (Each undeclared identifier is reported only once 
                      zend_operators.c:1302: for each function it appears in.) 
                      zend_operators.c:1302: parse error before `first' 
                      zend_operators.c:1305: warning: implicit declaration of function `init_num' 
                      zend_operators.c:1305: `first' undeclared (first use in this function) 
                      zend_operators.c:1306: `second' undeclared (first use in this function) 
                      zend_operators.c:1307: warning: implicit declaration of function `str2num' 
                      zend_operators.c:1309: warning: implicit declaration of function `bc_compare' 
                      zend_operators.c:1311: warning: implicit declaration of function `free_num' 
                      make[1]: *** [zend_operators.lo] Error 1 
                      make[1]: Leaving directory `/web/src/php-4.0b4pl1/Zend' 
                      make: *** [all-recursive] Error 1 

                      If I take out the --enable-bcmath from the configure, then the following "make" 
                      runs okay