Problems compiling PHP

I'm having problems getting php 4.0 to compile. My current environment is: Red Hat 6.2 apache 1.3.12 w/ php 3.0, php ldap, php imap, etc (all the "add on" php rpm's from Red Hat) Gnu make 3.78.1 flex 2.5.4 bison 1.28 These were all installed from the Red Hat RPM's, most if not all are from the 6.2 cd (I may have a newer version of flex and bison from the web install, but that's about it). I configured it with: # ./configure --with-apxs (also tried --with-ldap, --with-imap cause that's what I really want) When I run make, I get the following: # make Making all in Zend make[1]: Entering directory `/home/jeffc/php/php-4.0.0/Zend' /bin/sh ../libtool --silent --mode=compile gcc -DHAVE_CONFIG_H -I. -I. -I.. -DXML_BYTE_ORDER=12 -g -O2 -Wall -c zend-scanner.c In file included from /usr/include/errno.h:36, from ./zend-scanner.l:41: /usr/include/bits/errno.h:25: linux/errno.h: No such file or directory make[1]: *** [zend-scanner.lo] Error 1 make[1]: Leaving directory `/home/jeffc/php/php-4.0.0/Zend' make: *** [all-recursive] Error 1 One of the errors was that linux/errno.h was missing. Just to see if it would help, I edited /usr/include/errno.h and commented out "#include linux/errno.h" to see if I could get past that. I then got: # make Making all in Zend make[1]: Entering directory `/home/jeffc/php/php-4.0.0/Zend' /bin/sh ../libtool --silent --mode=compile gcc -DHAVE_CONFIG_H -I. -I. -I.. -DXML_BYTE_ORDER=12 -g -O2 -Wall -c zend-scanner.c ./zend-scanner.l: In function `lex_scan': ./zend-scanner.l:1134: `ERANGE' undeclared (first use in this function) ./zend-scanner.l:1134: (Each undeclared identifier is reported only once ./zend-scanner.l:1134: for each function it appears in.) zend-scanner.c:3557: warning: `yy_cp' might be used uninitialized in this function zend-scanner.c:3557: warning: `yy_bp' might be used uninitialized in this function zend-scanner.c: At top level: zend-scanner.c:5766: warning: `yy_fatal_error' defined but not used zend-scanner.c:5751: warning: `yy_top_state' defined but not used make[1]: *** [zend-scanner.lo] Error 1 make[1]: Leaving directory `/home/jeffc/php/php-4.0.0/Zend' make: *** [all-recursive] Error 1 I tried uninstalling php 3, did make clean, and redid the configure and make just in case, but same errors. I checked the faqs, and saw the problems with Red Hat 6.1, but it looks like 6.2 fixed those. Also checked the other items in apxs, but everything looks good there (doesn't look like it gets that far anyway). Any idea what I am doing wrong? Thanks, Jeff