X-Git-Url: http://git.pond.sub.org/?p=empserver;a=blobdiff_plain;f=m4%2Fmy_working_in6_is_addr_v4mapped.m4;fp=m4%2Fmy_working_in6_is_addr_v4mapped.m4;h=2c4768264719473bd92775e1f3c78f8cb81156c6;hp=0000000000000000000000000000000000000000;hb=d6c5c263b9af7dc4b86851e0fad6473cd2ac6f65;hpb=8e00a618125b0ff0a86d927c78da8061fe596402

diff --git a/m4/my_working_in6_is_addr_v4mapped.m4 b/m4/my_working_in6_is_addr_v4mapped.m4
new file mode 100644
index 000000000..2c4768264
--- /dev/null
+++ b/m4/my_working_in6_is_addr_v4mapped.m4
@@ -0,0 +1,20 @@
+AC_DEFUN([MY_WORKING_IN6_IS_ADDR_V4MAPPED], [
+    AC_CACHE_CHECK([whether IN6_IS_ADDR_V4MAPPED works],
+		   my_cv_func_in6_is_addr_v4mapped, [
+	AC_COMPILE_IFELSE(
+	    [AC_LANG_SOURCE([[#include <netinet/in.h>
+int foo(struct sockaddr_in6 *sap6)
+{
+    return IN6_IS_ADDR_V4MAPPED(&sap6->sin6_addr);
+}]])],
+	    [my_cv_func_in6_is_addr_v4mapped=yes],
+	    [my_cv_func_in6_is_addr_v4mapped=no])])
+    AC_CHECK_MEMBERS([struct sockaddr_in6.sin6_addr.s6_addr],
+		     [my_member_sockaddr_in6_sin6_addr_s6_addr=yes],
+		     [my_member_sockaddr_in6_sin6_addr_s6_addr=no],
+		     [[#include <netinet/in.h>]])
+    if test "x$my_cv_func_in6_is_addr_v4mapped$my_member_sockaddr_in6_sin6_addr_s6_addr" = xyesyes; then
+	AC_DEFINE([HAVE_WORKING_IN6_IS_ADDR_V4MAPPED], [1],
+		  [Define if you have a working IN6_IS_ADDR_V4MAPPED()])
+    fi
+])