The New C/C++ Project With Existing Sources wizard enables you to create a project using an existing makefile.
In the Code Assistance page, you choose how your code will be parsed to create the configuration used by the code assistance features of the IDE. Code assistance is a set of IDE features that help you navigate and edit source code. See About Editing C and C++ Source Files for more about these features.
Build log. This option is available only if you deselected Clean and Build after Finish in Step 3 Build Tool and you did not specify a Build Result in step 4 Build Actions in the wizard.
You can specify the path and file name of an existing build log that the IDE can use to gather information for code assistance. The log must be from a full build rather than an incremental build.