Update findEigenLib for Windows: find eigen3 locally instead of using an embedded archive.

CMake/findEIGENLib.cmake

@@ -48,45 +48,14 @@ if(UNIX)
 	endif()
 elseif(WIN32)
 	### find and/or install eigen lib (cf. http://eigen.tuxfamily.org/index.php?title=Main_Page)
-	set(INCLUDE_PATH_LIST ${INCLUDE_PATH_LIST_TMP_DEFAULT}) # CACHE PATH "List of include paths used as PATH parameter in find_path")
+	# TODO: set a cmake/env variable to vary the windows install path
+	set(INCLUDE_PATH_LIST ${INCLUDE_PATH_LIST_TMP_DEFAULT} "C:/Program Files (x86)/Eigen3/include/eigen3") # CACHE PATH "List of include paths used as PATH parameter in find_path")
 	check_external_includes("Eigen/Dense" EIGEN_INC_DIR 0) # on test avec INCLUDE_PATH_LIST_TMP_DEFAULT
 	if (EIGEN_INC_DIR)
 		message(STATUS "Eigen library is available here: ${EIGEN_INC_DIR}")
 	else (EIGEN_INC_DIR)
-		message(STATUS "------------------------------------------------")		
-		message(STATUS "------------------------------------------------")
-		message(STATUS "------------- EIGEN LIB INSTALLATION -----------")
-		message(STATUS "------------------------------------------------")
-		message(STATUS "------------------------------------------------")
-
-		set(EIGEN_LINK https://gitlab.com/libeigen/eigen/-/archive/3.2.8/eigen-3.2.8.zip)
-		string(REGEX REPLACE "https://.*/(.*).zip" "\\1" EIGEN_LIB_NAME ${EIGEN_LINK})
-		if(NOT EXISTS ${CMAKE_SOURCE_DIR}/externals/win/zipLibs/${EIGEN_LIB_NAME}.zip)
-			file(DOWNLOAD ${EIGEN_LINK} ${CMAKE_SOURCE_DIR}/externals/win/zipLibs/${EIGEN_LIB_NAME}.zip SHOW_PROGRESS)
-		endif()
-		if(NOT EXISTS ${CMAKE_SOURCE_DIR}/externals/win/${EIGEN_LIB_NAME})
-			file(ARCHIVE_EXTRACT INPUT ${CMAKE_SOURCE_DIR}/externals/win/zipLibs/${EIGEN_LIB_NAME}.zip DESTINATION ${CMAKE_SOURCE_DIR}/externals/win)
-		endif()
-		add_include_path(INCLUDE_PATH_LIST_TMP_EIGEN "${PROJECT_SOURCE_DIR}/externals/win/${EIGEN_LIB_NAME}")
-
-
-		#add_include_path(INCLUDE_PATH_LIST_TMP2 "${PROJECT_SOURCE_DIR}/externals/eigen")
-		#set(INCLUDE_PATH_LIST2 ${INCLUDE_PATH_LIST_TMP2} CACHE PATH "List of include paths used as PATH parameter in find_path")
-		set(INCLUDE_PATH_LIST ${INCLUDE_PATH_LIST_TMP_EIGEN})# CACHE PATH "List of include paths used as PATH parameter in find_path")
-		#message(STATUS "INCLUDE_PATH_LIST=${INCLUDE_PATH_LIST}")
-		check_external_includes("Eigen/Dense" EIGEN_INC_DIR 0)
-
-		if ( EIGEN_INC_DIR )
-			message(STATUS "Eigen library is available here: ${EIGEN_INC_DIR}")
-		else(EIGEN_INC_DIR)	
-			message(STATUS "Eigen library is not available here: ${EIGEN_INC_DIR}")
-			message(FATAL_ERROR "Eigen library is not installed on your system. Please check Eigen install.")	
-		endif(EIGEN_INC_DIR)
-
-		message(STATUS "------------------------------------------------")
-		message(STATUS "------------------------------------------------")	
+		message(FATAL_ERROR "Didn't find eigen installed on your system, it should be in C:\Program Files (x86)\Eigen3")
 	endif (EIGEN_INC_DIR)
-	#############################################################
 else()
 	message(WARNING "Unknown type of plateform for library Eigen")
 endif()