+Recent cmake seems not to populate INTERFACE_INCLUDE_DIRECTORIES when using target_include_directories with empty path list.
+
+Drop duplicate "decaf" from includes path.
+
+--- libdecaf-1.0.0/cmake/DecafConfig.cmake.in.orig 2018-06-06 00:25:08.000000000 +0200
++++ libdecaf-1.0.0/cmake/DecafConfig.cmake.in 2020-09-26 09:22:59.720744590 +0200
+@@ -42,9 +42,7 @@
+ endif()
+ endif()
+ endif()
+-get_target_property(DECAF_INCLUDE_DIRS ${DECAF_TARGETNAME} INTERFACE_INCLUDE_DIRECTORIES)
+-list(INSERT DECAF_INCLUDE_DIRS 0 "@CMAKE_INSTALL_FULL_INCLUDEDIR@")
+-list(REMOVE_DUPLICATES DECAF_INCLUDE_DIRS)
++set(DECAF_INCLUDE_DIRS "@CMAKE_INSTALL_FULL_INCLUDEDIR@")
+
+ set(DECAF_CPPFLAGS @DECAF_CPPFLAGS@)
+ set(DECAF_FOUND 1)
+--- libdecaf-1.0.0/src/CMakeLists.txt.orig 2018-06-06 00:25:08.000000000 +0200
++++ libdecaf-1.0.0/src/CMakeLists.txt 2020-09-26 09:39:00.252207612 +0200
+@@ -119,7 +119,7 @@
+ endif()
+
+ install(DIRECTORY ${GSOURCE_PATH}/include/
+- DESTINATION include/decaf
++ DESTINATION include
+ FILES_MATCHING PATTERN "*.h*"
+ PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
+ )