Manual builds let you choose the scope of a build, as well as options for building, or rebuilding projects. You can view the output of the make utility in the console.
To rebuild all open projects:
You can manually rebuild all open projects. Depending on the number of projects, the size of the projects, and the number of target architectures, this action can take a significant amount of time.
To rebuild a single project:
Because rebuilding all open projects may be time-consuming, you may want to build only certain projects.
Tip: If you get the error message:
Exec error:Launching failed
The error message means that the CDT cannot locate the build command, (usually make). Either your path is not configured correctly or you do not have make installed on your system.
Defining Build Settings
Building
Make Builder page, C/C++ Properties window