8297822: De-duplicate code in module jdk.sctp

Reviewed-by: dfuchs, rriggs

Author: minborg

make/modules/jdk.sctp/Java.gmk

@@ -44,3 +44,10 @@ endif
 ifeq ($(call isTargetOs, aix), true)
   EXCLUDE_FILES += $(SCTP_IMPL_CLASSES)
 endif
+
+ifeq ($(call isTargetOsType, unix), true)
+  ifeq ($(call isTargetOs, macos aix), false)
+    # This class is not needed on "unix" because SCTP in Java is supported for that platform
+    EXCLUDE_FILES += $(TOPDIR)/src/jdk.sctp/share/classes/sun/nio/ch/sctp/UnsupportedUtil.java
+  endif
+endif