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-rw-r--r--ext/socket/extconf.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/ext/socket/extconf.rb b/ext/socket/extconf.rb
index b0b44180c9..d1ce000f5e 100644
--- a/ext/socket/extconf.rb
+++ b/ext/socket/extconf.rb
@@ -306,6 +306,8 @@ else
$objs += ["getnameinfo.#{$OBJEXT}"]
have_func("inet_ntop") or have_func("inet_ntoa")
have_func("inet_pton") or have_func("inet_aton")
+ have_func("getservbyport")
+ have_header("arpa/inet.h")
have_header("arpa/nameser.h")
have_header("resolv.h")
end