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-rw-r--r--erts/configure.in58
1 files changed, 58 insertions, 0 deletions
diff --git a/erts/configure.in b/erts/configure.in
index cb1b00b8b1..e9736ab6fe 100644
--- a/erts/configure.in
+++ b/erts/configure.in
@@ -1949,6 +1949,64 @@ AC_CHECK_FUNCS([openpty])
AC_CHECK_HEADERS(net/if_dl.h ifaddrs.h netpacket/packet.h)
AC_CHECK_FUNCS([getifaddrs])
+dnl Checks for variables in6addr_any and in6addr_loopback,
+dnl
+dnl They normally declared by netinet/in.h, according to POSIX,
+dnl but not on Windows 7 (Windows SDK 7.1). I would have liked
+dnl to just write AC_CHECK_DECL([in6addr_any], ...) but if doing so,
+dnl the configure check fails erroneously on Linux with the error
+dnl "cannot convert to a pointer type", on a line looking like
+dnl "char *p = (char *) in6addr_any;", so work around that
+dnl with some more code.
+AC_CACHE_CHECK(
+ [whether in6addr_any is declared],
+ [erts_cv_have_in6addr_any],
+ [AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[
+ #include <sys/types.h>
+ #include <sys/socket.h>
+ #include <netinet/in.h>
+ ]],
+ [[printf("%d", in6addr_any.s6_addr[16]);]]
+ )],
+ [erts_cv_have_in6addr_any=yes],
+ [erts_cv_have_in6addr_any=no]
+ )]
+)
+
+case "$erts_cv_have_in6addr_any" in
+ yes)
+ AC_DEFINE([HAVE_IN6ADDR_ANY], [1],
+ [Define to 1 if you have the variable in6addr_any declared.])
+esac
+
+AC_CACHE_CHECK(
+ [whether in6addr_loopback is declared],
+ [erts_cv_have_in6addr_loopback],
+ [AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[
+ #include <sys/types.h>
+ #include <sys/socket.h>
+ #include <netinet/in.h>
+ ]],
+ [[printf("%d", in6addr_loopback.s6_addr[16]);]]
+ )],
+ [erts_cv_have_in6addr_loopback=yes],
+ [erts_cv_have_in6addr_loopback=no]
+ )]
+)
+
+case "$erts_cv_have_in6addr_loopback" in
+ yes)
+ AC_DEFINE([HAVE_IN6ADDR_LOOPBACK], [1],
+ [Define to 1 if you have the variable in6addr_loopback declared.])
+esac
+
+AC_CHECK_DECLS([IN6ADDR_ANY_INIT, IN6ADDR_LOOPBACK_INIT], [], [],
+ [#include <netinet/in.h>])
+
dnl ----------------------------------------------------------------------
dnl Checks for features/quirks in the system that affects Erlang.
dnl ----------------------------------------------------------------------