====== The build environment ======

After completing the [[en:build:installation|Installation of the build environment]] U-Boot, Linux kernel, individual programs or an archive of a complete profile for the MFG tool can be built.

The top level directory of the build environment is called //$TOPDIR//.

===== MFG profiles =====

MFG profile archives can be built from the top level directory of the build environment by executing

<code bash>make mfg</code>

This builds all components as well as placing two zip archives in the directory //images///:

^ archive ^ Description ^
| //tqma28-mfg-linux-update.zip// | to install U-Boot, linux kernel, custom und debian rootfs |
| //tqma28-mfg-u-boot.zip// | to execute U-Boot w/o installation (e.g. for booting via NFS) |

===== Kernel =====

It may be useful to build the linux kernel only, e.g. when using a different configuration, or after updating the working tree from the repository.

The Makefile in the kernel directory //kernel/// provides the following targets:

^ Target ^ Description  ^ Build results in  ^
| xconfig | launches the graphical kernel configuration tool. \\ Attention: the new configuration must be saved afterwards using target //saveconfig//, because it would be deleted during a rebuild of the kernel  | //build/.config//  |
| saveconfig | copies the previously created kernel configuration //make xconfig// to directory local-2.6.xx | //local-2.6-xx///  |
| all (default) | builds kernel, modules and drivers  | //build/// |
| install | builds kernel, modules and drivers and copies resulting binaries to directory //$TOPDIR/install/// | //$TOPDIR/install/{lib/modules/2.6.xx/,tftpboot/}//  |

TBC