Improve OpenBLASConfig.cmake contents

Makefile.install

@@ -191,22 +191,29 @@ endif
 #Generating OpenBLASConfig.cmake
 	@echo Generating $(OPENBLAS_CMAKE_CONFIG) in $(DESTDIR)$(OPENBLAS_CMAKE_DIR)
 	@echo "SET(OpenBLAS_VERSION \"${VERSION}\")" > "$(DESTDIR)$(OPENBLAS_CMAKE_DIR)/$(OPENBLAS_CMAKE_CONFIG)"
-	@echo "SET(OpenBLAS_INCLUDE_DIRS ${OPENBLAS_INCLUDE_DIR})" >> "$(DESTDIR)$(OPENBLAS_CMAKE_DIR)/$(OPENBLAS_CMAKE_CONFIG)"
+	@echo "file(REAL_PATH \"../../..\" _OpenBLAS_ROOT_DIR BASE_DIRECTORY \$${CMAKE_CURRENT_LIST_DIR} )" > "$(DESTDIR)$(OPENBLAS_CMAKE_DIR)/$(OPENBLAS_CMAKE_CONFIG)"
+	@echo "SET(OpenBLAS_INCLUDE_DIRS \$${_OpenBLAS_ROOT_DIR}/include)" >> "$(DESTDIR)$(OPENBLAS_CMAKE_DIR)/$(OPENBLAS_CMAKE_CONFIG)"
 
 ifneq ($(NO_SHARED),1)
 #ifeq logical or
 ifeq ($(OSNAME), $(filter $(OSNAME),Linux FreeBSD NetBSD OpenBSD DragonFly))
-	@echo "SET(OpenBLAS_LIBRARIES ${OPENBLAS_LIBRARY_DIR}/$(LIBPREFIX)$(SYMBOLSUFFIX).so)" >> "$(DESTDIR)$(OPENBLAS_CMAKE_DIR)/$(OPENBLAS_CMAKE_CONFIG)"
+	@echo "SET(OpenBLAS_LIBRARIES \$${_OpenBLAS_ROOT_DIR}/lib/$(LIBPREFIX)$(SYMBOLSUFFIX).so)" >> "$(DESTDIR)$(OPENBLAS_CMAKE_DIR)/$(OPENBLAS_CMAKE_CONFIG)"
 endif
 ifeq ($(OSNAME), $(filter $(OSNAME),WINNT CYGWIN_NT))
-	@echo "SET(OpenBLAS_LIBRARIES ${OPENBLAS_BINARY_DIR}/$(LIBDLLNAME))" >> "$(DESTDIR)$(OPENBLAS_CMAKE_DIR)/$(OPENBLAS_CMAKE_CONFIG)"
+	@echo "SET(OpenBLAS_LIBRARIES \$${_OpenBLAS_ROOT_DIR}/bin/$(LIBDLLNAME))" >> "$(DESTDIR)$(OPENBLAS_CMAKE_DIR)/$(OPENBLAS_CMAKE_CONFIG)"
 endif
 ifeq ($(OSNAME), Darwin)
-	@echo "SET(OpenBLAS_LIBRARIES ${OPENBLAS_LIBRARY_DIR}/$(LIBPREFIX).dylib)" >> "$(DESTDIR)$(OPENBLAS_CMAKE_DIR)/$(OPENBLAS_CMAKE_CONFIG)"
+	@echo "SET(OpenBLAS_LIBRARIES \$${_OpenBLAS_ROOT_DIR}/lib/$(LIBPREFIX).dylib)" >> "$(DESTDIR)$(OPENBLAS_CMAKE_DIR)/$(OPENBLAS_CMAKE_CONFIG)"
+endif
+	@echo "add_library(OpenBLAS::OpenBLAS SHARED IMPORTED)"
+	@echo "target_include_directories(OpenBLAS::OpenBLAS INTERFACE \$${OpenBLAS_INCLUDE_DIRS})"
+ifeq ($(OSNAME), $(filter $(OSNAME),WINNT CYGWIN_NT))
+	@echo "set_property(TARGET OpenBLAS::OpenBLAS PROPERTY IMPORTED_LOCATION \$${OpenBLAS_LIBRARIES})"
+	@echo "set_property(TARGET OpenBLAS::OpenBLAS PROPERTY IMPORTED_IMPLIB \$${_OpenBLAS_ROOT_DIR}/lib/libopenblas.lib)"
 endif
 else
 #only static
-	@echo "SET(OpenBLAS_LIBRARIES ${OPENBLAS_LIBRARY_DIR}/$(LIBPREFIX).$(LIBSUFFIX))" >> "$(DESTDIR)$(OPENBLAS_CMAKE_DIR)/$(OPENBLAS_CMAKE_CONFIG)"
+	@echo "SET(OpenBLAS_LIBRARIES \$${_OpenBLAS_ROOT_DIR}/lib/$(LIBPREFIX).$(LIBSUFFIX))" >> "$(DESTDIR)$(OPENBLAS_CMAKE_DIR)/$(OPENBLAS_CMAKE_CONFIG)"
 endif
 #Generating OpenBLASConfigVersion.cmake
 	@echo Generating $(OPENBLAS_CMAKE_CONFIG_VERSION) in $(DESTDIR)$(OPENBLAS_CMAKE_DIR)