RPATH settings should be defined before first target (#176)

CMakeLists.txt

@@ -58,6 +58,22 @@ find_package(Git QUIET)
 find_package(ApMon MODULE)
 find_package(RdKafka CONFIG)
 
+####################################
+# Handle RPATH
+####################################
+include(GNUInstallDirs)
+
+# Build targets with install rpath on Mac to dramatically speed up installation
+set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
+list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}" isSystemDir)
+if(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
+  if("${isSystemDir}" STREQUAL "-1")
+    set(CMAKE_INSTALL_RPATH "@loader_path/../${CMAKE_INSTALL_LIBDIR}")
+  endif()
+  set(CMAKE_BUILD_WITH_INSTALL_RPATH TRUE)
+endif()
+unset(isSystemDir)
+
 ####################################
 # Library
 ####################################
@@ -217,20 +233,6 @@ endforeach()
 # Install
 ####################################
 
-include(GNUInstallDirs)
-
-# Build targets with install rpath on Mac to dramatically speed up installation
-# https://gitlab.kitware.com/cmake/community/wikis/doc/cmake/RPATH-handling
-set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
-list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}" isSystemDir)
-if(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
-  if("${isSystemDir}" STREQUAL "-1")
-    set(CMAKE_INSTALL_RPATH "@loader_path/../${CMAKE_INSTALL_LIBDIR}")
-  endif()
-  set(CMAKE_BUILD_WITH_INSTALL_RPATH TRUE)
-endif()
-unset(isSystemDir)
-
 # Install library
 install(TARGETS Monitoring 5-Benchmark
   EXPORT MonitoringTargets