Compatibility with 2.4

[openldap] / configure.in

diff --git a/configure.in b/configure.in
index 816294ceeb264939eedbb17138fcd2630a10f7c0..ede3d8e67b70f27c0d396a35d8d9104a93a519e0 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -2378,14 +2378,43 @@ AC_CHECK_TYPE(size_t, unsigned)
 AC_CHECK_TYPES([long long])
 AC_CHECK_TYPES([ptrdiff_t])
 
-AC_CHECK_TYPE([socklen_t],,
-       [AC_DEFINE_UNQUOTED([socklen_t], [int],
-               [Define to `int' if <sys/socket.h> does not define.])],
-       [$ac_includes_default
+
+AC_CHECK_TYPE([socklen_t],,, [$ac_includes_default
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif])
+
+dnl socklen_t-like type in accept(), default socklen_t or int:
+dnl - The OS might define socklen_t without using it.  POSIX moved from
+dnl   int to size_t to socklen_t, hoping to stay at a 32-bit type, and
+dnl   HP-UX now has selectors for what to use.
+dnl - On Solaris 2.8 the prototype has void *len, but the default is OK.
+AC_MSG_CHECKING([the type of arg 3 to accept()])
+AC_CACHE_VAL(ol_cv_type_ber_socklen_t, [
+       set socklen_t int unsigned "unsigned long" long size_t
+       test "$ac_cv_type_socklen_t" = yes || shift
+       ol_cv_type_ber_socklen_t=$1 guessing="guessing "
+       for lentype in "$@" ; do for addrtype in "struct sockaddr" void ; do
+               AC_COMPILE_IFELSE([AC_LANG_PROGRAM([$ac_includes_default
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
 #endif
-       ])
+extern int accept(int s, $addrtype *ap, $lentype *lp);
+], [
+accept(0, (struct sockaddr *) 0, ($lentype *) 0);
+])], [ol_cv_type_ber_socklen_t=$lentype guessing= ; break 2])
+       done ; done])
+AC_MSG_RESULT([$guessing$ol_cv_type_ber_socklen_t *])
+AC_DEFINE_UNQUOTED(ber_socklen_t, $ol_cv_type_ber_socklen_t,
+       [Define to the type of arg 3 for `accept'.])
+
+dnl Modules should use ber_socklen_t, not socklen_t.  Define socklen_t
+dnl for the time being anyway, for backwards compatibility.
+if test "$ac_cv_type_socklen_t" != yes; then
+       AC_DEFINE_UNQUOTED([socklen_t], [$ol_cv_type_ber_socklen_t],
+               [Define like ber_socklen_t if <sys/socket.h> does not define.])
+fi
+
 
 AC_TYPE_SIGNAL