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<section begin=BELK/>=Overview=Introduction to development environment==
The following pictures show a simplified scheme of the the development environment for an Embedded Linux system based on BORA or BORAX. The two main blocks are a host machine and a target machine.
In a typical environment, the host is used by the developer to (cross-)compile the code that is to run on the target. In our case, the target is a SOM, while the host is assumed to be a PC running the Linux operating system, either in a physical installation or as a virtual machine (for recent kits, this is the [[Logical_structure_of_Bora_and_BoraX_Embedded_Linux_Kits_(BORA_SOM/BELK-L/General/BXELK)Logical_structure_of_BELK#BELK_starting_from_version_4.0.0_.2F_BXELK_starting_from_version_2.0.0|MVM]]).
The bootloader running on the target can download the Linux kernel image through the network (TFTP), as well as the bootloader binary images (useful when an update of the bootloader is required).
The Software Development Kit (SDK) is the Xilinx Integrated Design Environment for creating embedded applications on Zynq™-7000 All Programmable SoCs. SDK is the first application IDE to deliver true homogeneous and heterogeneous multi-processor design and debug, it is optionally included with the Vivado Design Suite or ISE Design Suite, or available as a separate free download for application developers. It is based on Eclipse and CDT and it directly interfaces to the Vivado embedded hardware design environment. The SDK offers support for complete software design and debug flows including multiprocessor and hardware/software debug capabilities, integrating editor, compilers, build tools, flash memory management, JTAG/GDB debug, custom libraries and device drivers.
As described [[Logical_structure_of_Bora_and_BoraX_Embedded_Linux_Kits_(BORA_SOM/BELK-L/General/BXELK)Logical_structure_of_BELK|here]], in the context of BELK/BXELK, the SDK is no longer required for the version of BELK starting from 4.0.0 and for the version of BXELK starting from 2.0.0.
===Toolchain===
===Target root file system===
The Linux kernel running on the target needs to mount a root file system. Building a root file system from scratch is definitively a complex task because several well-known directories must be created and populated with a lot of files that must follow some standard rules. Again we will use pre-packaged root file systems that makes this task much easier. <u>Please note that using a pre-packaged root file system can lead to conflicts with the application binaries obtained using the pre-built cross-toolchain: as a general rule, dynamically linking an application against libraries built with a different toolchain can cause malfunctioning.</u>
<section end=BELK/>
