cache install prefix

Author: scivision

options.cmake

@@ -20,7 +20,7 @@ endif()
 option(h5fortran_BUILD_TESTING "build tests" ${PROJECT_IS_TOP_LEVEL})
 
 if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT AND PROJECT_IS_TOP_LEVEL)
-  set(CMAKE_INSTALL_PREFIX "${CMAKE_BINARY_DIR}/local" CACHE PATH "path to install" FORCE)
+  set_property(CACHE CMAKE_INSTALL_PREFIX PROPERTY VALUE "${PROJECT_BINARY_DIR}/local")
 endif()
 
 set_property(DIRECTORY PROPERTY EP_UPDATE_DISCONNECTED true)