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Xenomai has two mutually exclusive cores: - Cobalt: dual-kernel approach: patched kernel + userland - Mercury: only userland In the Cobalt core, not all architectures are supported. This is the source of the existing ARCH_SUPPORTS variable. In the Mercury core, there is no imposed architecture restriction. Rename the XENOMAI_ARCH_SUPPORTS flag to XENOMAI_COBALT_ARCH_SUPPORTS and move its check from the Xenomai package to the Cobalt core. Nevertheless, even for Mercury, there are some restrictions: - pthread_atfork is used, which requires an MMU - sync functions like __sync_sub_and_fetch and __sync_add_and_fetch are expected. As the corresponding 'linux extension' selects Xenomai, we add the MMU and sync dependencies there too. They may or may not already be covered by XENOMAI_COBALT_ARCH_SUPPORTS flag. Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on Freenode IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches