Remove cmake version constraint from CMake package

CMakeLists.txt

@@ -40,7 +40,11 @@ add_library(FairLogger SHARED
 target_include_directories(FairLogger
     PUBLIC
     $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/logger>
-    $<INSTALL_INTERFACE:include>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+set_target_properties(FairLogger PROPERTIES
+  VERSION ${PROJECT_VERSION}
+  SOVERSION "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}"
 )
 
 if(BUILD_TESTING)

cmake/FairLoggerConfig.cmake.in

@@ -6,8 +6,6 @@
 #                  copied verbatim in the file "LICENSE"                       #
 ################################################################################
 
-cmake_minimum_required(VERSION 3.9.4 FATAL_ERROR)
-
 @PACKAGE_INIT@
 
 ### General variables for project discovery/inspection
@@ -19,6 +17,10 @@ set_and_check(FairLogger_BINDIR @PACKAGE_CMAKE_INSTALL_PREFIX@/@FairLogger_INSTA
 set_and_check(FairLogger_INCDIR @PACKAGE_CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_INCLUDEDIR@)
 set_and_check(FairLogger_LIBDIR @PACKAGE_CMAKE_INSTALL_PREFIX@/@FairLogger_INSTALL_LIBDIR@)
 
+set(@PROJECT_NAME@_CXX_STANDARD_REQUIRED @CMAKE_CXX_STANDARD_REQUIRED@)
+set(@PROJECT_NAME@_CXX_STANDARD @CMAKE_CXX_STANDARD@)
+set(@PROJECT_NAME@_CXX_EXTENSIONS @CMAKE_CXX_EXTENSIONS@)
+
 ### Import targets
 include(@PACKAGE_CMAKE_INSTALL_PREFIX@/@PACKAGE_INSTALL_DESTINATION@/FairLoggerTargets.cmake)
 

cmake/FairLoggerLib.cmake

@@ -35,7 +35,9 @@ endif()
 macro(set_fairlogger_cmake_policies)
   # Find more details to each policy with cmake --help-policy CMPXXXX
   foreach(policy
+    CMP0025 # Compiler id for Apple Clang is now AppleClang.
     CMP0028 # Double colon in target name means ALIAS or IMPORTED target.
+    CMP0042 # MACOSX_RPATH is enabled by default.
     CMP0048 # The ``project()`` command manages VERSION variables.
     CMP0054 # Only interpret ``if()`` arguments as variables or keywords when unquoted.
   )
@@ -132,6 +134,13 @@ macro(set_fairlogger_defaults)
   set(FairLogger_INSTALL_INCDIR ${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_NAME_LOWER})
   set(FairLogger_INSTALL_DATADIR ${CMAKE_INSTALL_DATADIR}/${PROJECT_NAME_LOWER})
 
+  # https://cmake.org/Wiki/CMake_RPATH_handling#Always_full_RPATH
+  set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
+  list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_PREFIX}/${PROJECT_INSTALL_LIBDIR}" isSystemDir)
+  if("${isSystemDir}" STREQUAL "-1")
+    set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${PROJECT_INSTALL_LIBDIR}")
+  endif()
+
   # Define export set, only one for now
   set(FairLogger_EXPORT_SET ${PROJECT_NAME}Targets)
 endmacro()