Buildroot-ts building end
From embeddedTS Manuals
At this point, the default configuration can be modified if desired:
make menuconfig
And finally, start the build process:
make
The buildroot process can take a large amount of time to build, depending on available system resources. Note that if any changes occur in the config file, it is recommended to clean the build tree and start the process over. A build ccache is not enabled by default, but can be to help speed up repeated builds. See the Buildroot manual for more information about ccache and Buildroot.
Once it is finished building, Buildroot will output a filesystem tarball to "output/images/rootfs.tar.xz". This file can be used with Installing Buildroot in lieu of the tarball provided on our FTP site.