Creating an ISAACConfigVersion.cmake using the user specified install directory for the version lookup.

Author: theZiz

lib/CMakeLists.txt

@@ -1,7 +1,13 @@
 cmake_minimum_required (VERSION 3.3)
 project (isaac)
 
+configure_file (
+	"${PROJECT_SOURCE_DIR}/ISAACConfigVersion.cmake.in"
+	"${PROJECT_BINARY_DIR}/ISAACConfigVersion.cmake"
+	@ONLY
+	)
+
 install( FILES "${CMAKE_CURRENT_SOURCE_DIR}/isaac.hpp" DESTINATION "include" )
 install( DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/isaac" DESTINATION "include" PATTERN "mainpage.dox" EXCLUDE )
 install( FILES "${CMAKE_CURRENT_SOURCE_DIR}/ISAACConfig.cmake" DESTINATION "lib/cmake/ISAAC" )
-install( FILES "${CMAKE_CURRENT_SOURCE_DIR}/ISAACConfigVersion.cmake" DESTINATION "lib/cmake/ISAAC" )
+install( FILES "${PROJECT_BINARY_DIR}/ISAACConfigVersion.cmake" DESTINATION "lib/cmake/ISAAC" )

lib/ISAACConfig.cmake

@@ -26,7 +26,6 @@ set(ISAAC_INCLUDE_DIRS ${ISAAC_INCLUDE_DIRS} "${ISAAC_DIR}/isaac")
 ###############################################################################
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${ISAAC_DIR}/Modules")
 
-
 ###############################################################################
 # OPTIONS
 ###############################################################################
@@ -165,5 +164,18 @@ endif()
 ################################################################################
 # Returning whether ISAAC could be found
 ################################################################################
+
 FIND_PACKAGE_HANDLE_STANDARD_ARGS(ISAAC
-                                  REQUIRED_VARS ISAAC_LIBRARIES ISAAC_INCLUDE_DIRS JANSSON_LIBRARIES JANSSON_INCLUDE_DIRS CMAKE_THREAD_LIBS_INIT ISAAC_MPI_FOUND ICET_CORE_LIBS ICET_MPI_LIBS ICET_INCLUDE_DIRS Boost_FOUND ISAAC_PRIVATE_FOUND)
+                                    REQUIRED_VARS
+                                        ISAAC_LIBRARIES
+                                        ISAAC_INCLUDE_DIRS
+                                        JANSSON_LIBRARIES
+                                        JANSSON_INCLUDE_DIRS
+                                        CMAKE_THREAD_LIBS_INIT
+                                        ISAAC_MPI_FOUND
+                                        ICET_CORE_LIBS
+                                        ICET_MPI_LIBS
+                                        ICET_INCLUDE_DIRS
+                                        Boost_FOUND
+                                        ISAAC_PRIVATE_FOUND
+                                )

lib/ISAACConfigVersion.cmake.in

@@ -0,0 +1,27 @@
+file(STRINGS "@CMAKE_INSTALL_PREFIX@/include/isaac/isaac_version.hpp" ISAAC_VERSION_MAJOR_HPP REGEX "#define ISAAC_VERSION_MAJOR ")
+file(STRINGS "@CMAKE_INSTALL_PREFIX@/include/isaac/isaac_version.hpp" ISAAC_VERSION_MINOR_HPP REGEX "#define ISAAC_VERSION_MINOR ")
+file(STRINGS "@CMAKE_INSTALL_PREFIX@/include/isaac/isaac_version.hpp" ISAAC_VERSION_PATCH_HPP REGEX "#define ISAAC_VERSION_PATCH ")
+
+string(REGEX MATCH "([0-9]+)" ISAAC_VERSION_MAJOR  ${ISAAC_VERSION_MAJOR_HPP})
+string(REGEX MATCH "([0-9]+)" ISAAC_VERSION_MINOR  ${ISAAC_VERSION_MINOR_HPP})
+string(REGEX MATCH "([0-9]+)" ISAAC_VERSION_PATCH  ${ISAAC_VERSION_PATCH_HPP})
+
+set(PACKAGE_VERSION "${ISAAC_VERSION_MAJOR}.${ISAAC_VERSION_MINOR}.${ISAAC_VERSION_PATCH}")
+
+# Check whether the requested PACKAGE_FIND_VERSION is exactly the one requested
+if("${PACKAGE_VERSION}" EQUAL "${PACKAGE_FIND_VERSION}")
+  set(PACKAGE_VERSION_EXACT TRUE)
+else()
+  set(PACKAGE_VERSION_EXACT FALSE)
+endif()
+
+# Check whether the requested PACKAGE_FIND_VERSION is compatible
+if("${PACKAGE_VERSION}" VERSION_LESS "${PACKAGE_FIND_VERSION}")
+  set(PACKAGE_VERSION_COMPATIBLE FALSE)
+else()
+  set(PACKAGE_VERSION_COMPATIBLE TRUE)
+  if ("${PACKAGE_VERSION}" VERSION_EQUAL "${PACKAGE_FIND_VERSION}")
+    set(PACKAGE_VERSION_EXACT TRUE)
+  endif()
+endif()
+