Fix RPATH for shared library (#81)

* Set rpath to '$ORIGIN' to help locate napa shared library

* Set install rpath to "@loader_path" in Mac os

Author: fs-eire

node/CMakeLists.txt

@@ -1,33 +1,45 @@
-# Files to compile
-file(GLOB SOURCE_FILES 
-    "addon.cpp"
-    "node-zone-delegates.cpp"
-    "${PROJECT_SOURCE_DIR}/src/platform/filesystem.cpp"
-    "${PROJECT_SOURCE_DIR}/src/platform/os.cpp"
-    "${PROJECT_SOURCE_DIR}/src/zone/call-context.cpp"
-    "${PROJECT_SOURCE_DIR}/src/zone/call-task.cpp"
-    "${PROJECT_SOURCE_DIR}/src/zone/eval-task.cpp"
-    "${PROJECT_SOURCE_DIR}/src/zone/terminable-task.cpp"
-    "${PROJECT_SOURCE_DIR}/src/module/core-modules/napa/*.cpp")
-
-# The addon name
-set(TARGET_NAME "${PROJECT_NAME}-binding")
-
-# The generated library
-add_library(${TARGET_NAME} SHARED ${SOURCE_FILES})
-
-set_target_properties(${TARGET_NAME} PROPERTIES PREFIX "" SUFFIX ".node")
-
-# Include directories
-target_include_directories(${TARGET_NAME} PRIVATE
-    ${CMAKE_JS_INC}
-    ${PROJECT_SOURCE_DIR}/src
-    ${PROJECT_SOURCE_DIR}/src/module/core-modules/napa)
-
-# Compiler definitions
-target_compile_definitions(${TARGET_NAME} PRIVATE BUILDING_NODE_EXTENSION NAPA_BINDING_EXPORTS)
-
-# Link libraries
-target_link_libraries(${TARGET_NAME} PRIVATE
-    ${PROJECT_NAME}
-    ${CMAKE_JS_LIB})
+# Files to compile
+file(GLOB SOURCE_FILES 
+    "addon.cpp"
+    "node-zone-delegates.cpp"
+    "${PROJECT_SOURCE_DIR}/src/platform/filesystem.cpp"
+    "${PROJECT_SOURCE_DIR}/src/platform/os.cpp"
+    "${PROJECT_SOURCE_DIR}/src/zone/call-context.cpp"
+    "${PROJECT_SOURCE_DIR}/src/zone/call-task.cpp"
+    "${PROJECT_SOURCE_DIR}/src/zone/eval-task.cpp"
+    "${PROJECT_SOURCE_DIR}/src/zone/terminable-task.cpp"
+    "${PROJECT_SOURCE_DIR}/src/module/core-modules/napa/*.cpp")
+
+# The addon name
+set(TARGET_NAME "${PROJECT_NAME}-binding")
+
+# The generated library
+add_library(${TARGET_NAME} SHARED ${SOURCE_FILES})
+
+set_target_properties(${TARGET_NAME} PROPERTIES PREFIX "" SUFFIX ".node")
+
+# Rpath definitions
+
+if (APPLE)
+    set_target_properties(${TARGET_NAME} PROPERTIES INSTALL_RPATH "@loader_path")
+else ()
+    set_target_properties(${TARGET_NAME} PROPERTIES INSTALL_RPATH "$ORIGIN/")
+endif()
+
+set_target_properties(${TARGET_NAME} PROPERTIES
+    BUILD_WITH_INSTALL_RPATH TRUE
+    INSTALL_RPATH_USE_LINK_PATH FALSE)
+
+# Include directories
+target_include_directories(${TARGET_NAME} PRIVATE
+    ${CMAKE_JS_INC}
+    ${PROJECT_SOURCE_DIR}/src
+    ${PROJECT_SOURCE_DIR}/src/module/core-modules/napa)
+
+# Compiler definitions
+target_compile_definitions(${TARGET_NAME} PRIVATE BUILDING_NODE_EXTENSION NAPA_BINDING_EXPORTS)
+
+# Link libraries
+target_link_libraries(${TARGET_NAME} PRIVATE
+    ${PROJECT_NAME}
+    ${CMAKE_JS_LIB})