Compile error

I'm trying to install PHP. I'm getting the same error with 4.2.2 and the latest snapshot during make. I'm trying to build it to work with Apache 2.0.40, IMAP, and TWIG. ./configure --with-mysql --with-imap --with-apxs2=/usr/local/apache-2.0.40/bin/apxs --enable-track-vars $ make /bin/sh libtool --silent --mode=compile gcc -Iext/ctype/ -I/var/downloads/php/php4-200208111800/ext/ctype/ -DPHP_ATOM_INC -I/var/downloads/php/php4-200208111800/include -I/var/downloads/php/php4-200208111800/main -I/var/downloads/php/php4-200208111800 -I/usr/local/apache-2.0.40/include -I/var/downloads/php/php4-200208111800/Zend -I/usr/local/include -I/var/downloads/php/php4-200208111800/ext/xml/expat -D_REENTRANT -I/var/downloads/php/php4-200208111800/TSRM -DTHREAD=1 -g -O2 -pthread -DZTS -prefer-pic -c /var/downloads/php/php4-200208111800/ext/ctype/ctype.c -o ext/ctype/ctype.lo In file included from /var/downloads/php/php4-200208111800/Zend/zend.h:59, from /var/downloads/php/php4-200208111800/main/php.h:34, from /var/downloads/php/php4-200208111800/ext/ctype/ctype.c:23: /usr/local/include/unix.h:182: parse error before `MAILSTREAM' /usr/local/include/unix.h:182: warning: no semicolon at end of struct or union /usr/local/include/unix.h:189: parse error before `}' /usr/local/include/unix.h:189: warning: data definition has no type or storage class /usr/local/include/unix.h:193: parse error before `*' /usr/local/include/unix.h:193: warning: data definition has no type or storage class /usr/local/include/unix.h:196: parse error before `*' /usr/local/include/unix.h:197: parse error before `*' /usr/local/include/unix.h:198: parse error before `*' /usr/local/include/unix.h:199: parse error before `*' /usr/local/include/unix.h:200: parse error before `*' /usr/local/include/unix.h:201: parse error before `*' /usr/local/include/unix.h:202: parse error before `*' /usr/local/include/unix.h:202: parse error before `*' /usr/local/include/unix.h:202: warning: data definition has no type or storage class /usr/local/include/unix.h:203: parse error before `*' /usr/local/include/unix.h:204: parse error before `*' /usr/local/include/unix.h:206: parse error before `*' /usr/local/include/unix.h:207: parse error before `*' /usr/local/include/unix.h:209: parse error before `*' /usr/local/include/unix.h:210: parse error before `*' /usr/local/include/unix.h:211: parse error before `*' /usr/local/include/unix.h:212: parse error before `*' /usr/local/include/unix.h:213: parse error before `*' /usr/local/include/unix.h:214: parse error before `*' /usr/local/include/unix.h:215: parse error before `*' /usr/local/include/unix.h:216: parse error before `*' /usr/local/include/unix.h:219: parse error before `*' /usr/local/include/unix.h:221: parse error before `DOTLOCK' /usr/local/include/unix.h:222: parse error before `MAILSTREAM' /usr/local/include/unix.h:223: parse error before `*' /usr/local/include/unix.h:224: parse error before `*' /usr/local/include/unix.h:225: parse error before `*' /usr/local/include/unix.h:226: parse error before `*' /usr/local/include/unix.h:228: parse error before `*' /usr/local/include/unix.h:229: parse error before `*' /usr/local/include/unix.h:230: parse error before `*' /usr/local/include/unix.h:231: parse error before `*' In file included from /var/downloads/php/php4-200208111800/main/php.h:88, from /var/downloads/php/php4-200208111800/ext/ctype/ctype.c:23: /usr/local/include/unix.h:159: redefinition of `struct unix_local' /usr/local/include/unix.h:171: warning: redefinition of `UNIXLOCAL' /usr/local/include/unix.h:171: warning: `UNIXLOCAL' previously declared here /usr/local/include/unix.h:182: parse error before `MAILSTREAM' /usr/local/include/unix.h:182: warning: no semicolon at end of struct or union /usr/local/include/unix.h:189: parse error before `}' /usr/local/include/unix.h:189: warning: data definition has no type or storage class /usr/local/include/unix.h:193: parse error before `*' /usr/local/include/unix.h:193: warning: data definition has no type or storage class /usr/local/include/unix.h:196: parse error before `*' /usr/local/include/unix.h:197: parse error before `*' /usr/local/include/unix.h:198: parse error before `*' /usr/local/include/unix.h:199: parse error before `*' /usr/local/include/unix.h:200: parse error before `*' /usr/local/include/unix.h:201: parse error before `*' /usr/local/include/unix.h:202: parse error before `*' /usr/local/include/unix.h:202: parse error before `*' /usr/local/include/unix.h:202: warning: data definition has no type or storage class /usr/local/include/unix.h:203: parse error before `*' /usr/local/include/unix.h:204: parse error before `*' /usr/local/include/unix.h:206: parse error before `*' /usr/local/include/unix.h:207: parse error before `*' /usr/local/include/unix.h:209: parse error before `*' /usr/local/include/unix.h:210: parse error before `*' /usr/local/include/unix.h:211: parse error before `*' /usr/local/include/unix.h:212: parse error before `*' /usr/local/include/unix.h:213: parse error before `*' /usr/local/include/unix.h:214: parse error before `*' /usr/local/include/unix.h:215: parse error before `*' /usr/local/include/unix.h:216: parse error before `*' /usr/local/include/unix.h:219: parse error before `*' /usr/local/include/unix.h:221: parse error before `DOTLOCK' /usr/local/include/unix.h:222: parse error before `MAILSTREAM' /usr/local/include/unix.h:223: parse error before `*' /usr/local/include/unix.h:224: parse error before `*' /usr/local/include/unix.h:225: parse error before `*' /usr/local/include/unix.h:226: parse error before `*' /usr/local/include/unix.h:228: parse error before `*' /usr/local/include/unix.h:229: parse error before `*' /usr/local/include/unix.h:230: parse error before `*' /usr/local/include/unix.h:231: parse error before `*' make: *** [ext/ctype/ctype.lo] Error 1 Suggestions? Glen