Eclipse CDT Launch failed Binary not found

(1)Build before Run

You must build before run, otherwise there would be no binary to run.

But you can set up auto build, so that you can build and run by one click.

Check this post How to set Eclipse CDT Auto Build

(2)If you are moving projects to another platform

Select the correct tool chain in C/C++ Build > Tool Chain editor

Select the correct binary parser in C/C++ Build->Settings->Binary Parsers

Set up a correct build configuration in C/C++ Build > Manage Configurations

Check this post Import Eclipse CDT project from Windows to Mac

(3)Another case is "supporting Mach-O 64 Parser"...

You may "make sure Mach-O Parser was checked or add “-arch i386"

or "if your Binaries menu is missing from Eclipse, try checking and unchecking the Mach-O 64 Parser then click OK."

For details, please check this post

http://thexploit.com/tools/os-x-10-6-64-bit-eclipse-cdt-missing-binaries/