Add configure stuff

(note that --with-xxx should be only used, if it references something
 external.)

ext/posix/config.h.stub

@@ -1,2 +0,0 @@
-/* define if you want to use the posix extension */
-/* #undef HAVE_LIBPOSIX */

ext/posix/config.m4

@@ -2,5 +2,17 @@ dnl $Id$
 dnl config.m4 for extension posix
 dnl don't forget to call PHP_EXTENSION(posix)
 
-PHP_EXTENSION(posix)
+AC_ARG_ENABLE(posix,
+[  --disable-posix         Disable POSIX-like functions],[
+  PHP_POSIX=$enableval
+],[
+  PHP_POSIX=yes
+])
 
+AC_MSG_CHECKING(whether to include POSIX-like functions)
+AC_MSG_RESULT($PHP_POSIX)
+
+if test "$PHP_POSIX" = "yes"; then
+  AC_DEFINE(HAVE_POSIX, 1, [whether to include POSIX-like functions])
+  PHP_EXTENSION(posix)
+fi

ext/posix/php3_posix.h

@@ -37,8 +37,6 @@
 #define HAVE_POSIX 1
 #endif
 
-#define HAVE_POSIX 1
-
 #if HAVE_POSIX
 #ifndef DLEXPORT
 #define DLEXPORT