![]() ![]() Due to this, kernels for embedded target boards are often maintained and/or provided by the Semiconductor Vendor, SoC/SoM/board manufacturers, or third parties such as Timesys. While the mainline Linux kernel is widely available from, support for the myriad of embedded target boards (and components found therein) is not commonly included here due to the strict standards and review process for having code committed to mainline kernel. Setting a Cross-Toolchain (Manual Cross-Compile) Obtaining and patching sources Obtaining Linux kernel source files Also be sure to check build_-timesys-linux-/rfs/ for the boot/ (kernel image, kernel configuration file, system map symbol table) and lib/ (for installed kernel modules) directories which are intended for use in the target board's RFS. The resulting kernel image and device tree binary (if applicable) can be found in the build_-timesys-linux-/images/ directory. Issuing the following from the top-level Factory directory will build the kernel with the Timesys-provided defaults for the selected board (steps 2 through 4-4, as needed): make kernel Note: At this point, Factory is able to produce the Linux kernel for your target board. The resulting cross-toolchain (built for the selected target board) will automatically be used in subsequent Factory operations described throughout this document. Once this is set, the cross-toolchain can then be generated by executing the following from the top-level Factory directory: Ensure this is the case by running the following from the top-level Factory directory:Īlso check Target Configuration > Board is set to your board. In order to build the toolchain, Factory needs to be configured with the appropriate target board selected. If a BSP/SDK build has not been completed yet, Factory can generate the cross-toolchain to provide the necessary components to cross-compile the Linux kernel. If a BSP/SDK build has already been completed, then Factory already has this cross-toolchain generated and properly provides the appropriate values during the kernel build process. The location of the various build tools included in the cross-toolchain (linker, assembler, compiler, etc.) needs to be known to the host system at the time these tools are needed during the kernel build. Quite often, an x86 host machine is used with a cross-toolchain to produce code that is executed on the target machine, which can be one of many supported architectures - ARM, PowerPC, MIPS, etc. This is commonly the case with embedded development, where native compilation (compiling code on the same embedded machine) can be difficult due to processing power and/or storage restrictions. Linux kernel) on one system (host machine) to be executed on another (target machine). The use of a cross-compilation toolchain (cross-toolchain) is necessary when compiling source code (i.e. With this, Factory builds the entire BSP/SDK (or whichever portions of it have not been completed), including the Linux kernel (see Building the Linux kernel with Desktop Factory for more info).įor more on what happens during the kernel build process, continue on with Setting a Cross-Toolchain. The following (run from the top-level of your configured Factory directory) will build the BSP/SDK defined in the Factory workorder, completing the steps outlined above: make Building Linux kernel as part of the BSP/SDK ![]() These three items can be obtained/generated by Factory directly, provided by a Factory-generated SDK installer, or obtained elsewhere. To complete these tasks, three things are necessary: patched Linux kernel sources, Linux kernel configuration file, and cross-compilation toolchain (or cross-toolchain). Typically, building the Linux kernel for an embedded board involves the following: ![]() You can also find information here on Building the Linux kernel with TimeStorm (Timesys' Eclipse-based IDE), as well as general steps for Building the Linux kernel manually with a Timesys-provided cross-toolchain. The focus of this document is to familiarize you with how to build the Linux kernel for your embedded system within Timesys' Desktop Factory buildsystem ( Building the Linux kernel with Desktop Factory). Here we'll discuss working with the Linux kernel and Timesys tools. ![]()
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