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-rw-r--r--ext/socket/extconf.rb3
1 files changed, 3 insertions, 0 deletions
diff --git a/ext/socket/extconf.rb b/ext/socket/extconf.rb
index 7908e62bc7..21f99b9848 100644
--- a/ext/socket/extconf.rb
+++ b/ext/socket/extconf.rb
@@ -324,6 +324,9 @@ have_func("getpeereid")
have_header("ucred.h", headers)
have_func("getpeerucred")
+# workaround for recent Windows SDK
+$defs << "-DIPPROTO_IPV6=IPPROTO_IPV6" if have_const("IPPROTO_IPV6") && !have_macro("IPPROTO_IPV6")
+
$distcleanfiles << "constants.h" << "constdefs.*"
if have_func(test_func)