188 ï Bootloader (U-Boot)Unpack the Source CodeWAGO-I/O-SYSTEM 750Linux Fieldbus Coupler9.3 Unpack the Source CodeThe boot loader (U-Boot) source code is on the CD in the file:CD:/uboot/sources/. The installation is done via> cd /media/cdrom/uboot/sources> sh install.shA directory called ~/uboot is created in the user's home directory, in which allfiles that are required for the boot loader compilation are stored.9.4 Compile Boot LoaderThe source code is configured and compiled via> cd ~/uboot> make modnet50_config> makeThe ELF object file is calledub.elf,the binary image for a Linux coupler update is calledub.bin,which is copied into the /tftpboot directory as ub.bin.Create Flash ImagesImages of the kernel and of the file system can be created during thecompilation of the Linux distribution (see chapter 5.3). A boot loader image iscreated during the compilation of the boot loader U-Boot. The files areautomatically copied into the /tftpboot directory which has to be createdbeforehand. See chapter 9.2.
