compile on solaris bails with --enable-thread-safety

I can't seem to compile php4beta3 with thread safety support enabled in the configure file.. make[3]: Entering directory `/export/home/waltb/rocketcash/php-4.0b3/ext/standard' /bin/sh ../../libtool --silent --mode=compile gcc -DHAVE_CONFIG_H -I. -I. -I../.. -I../../libzend -I../.. -I../../libzend -I/export/home/waltb/rocketcash/apache_1.3.6/src/include -I/export/home/waltb/rocketcash/apache_1.3.6/src/os/unix -I/u01/app/oracle/product/8.0.5/rdbms/demo -I/u01/app/oracle/product/8.0.5/network/public -I/u01/app/oracle/product/8.0.5/plsql/public -I/u01/app/oracle/product/8.0.5/rdbms/demo -I/u01/app/oracle/product/8.0.5/network/public -I/u01/app/oracle/product/8.0.5/plsql/public -I../../TSRM -I../../TSRM -D_REENTRANT -D_POSIX_PTHREAD_SEMANTICS -g -O2 -g -O2 -c -o array.lo array.c array.c: In function `php3_minit_array': array.c:105: `executor_globals' undeclared (first use in this function) array.c:105: (Each undeclared identifier is reported only once array.c:105: for each function it appears in.) make[3]: *** [array.lo] Error 1 make[3]: Leaving directory `/export/home/waltb/rocketcash/php-4.0b3/ext/standard' make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory `/export/home/waltb/rocketcash/php-4.0b3/ext' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/export/home/waltb/rocketcash/php-4.0b3' make: *** [all-recursive-am] Error 2 if I don't configure with thread safety on, then it works. Help?