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The context functions in uClibc unconditionally use the classic ARM instruction set. On platforms that do support the ARM instruction set, there is no problem - However, on platforms that only support the Thumb instruction set, the context functions cannot be built since the assembler code is not Thumb-ready. Therefore, these functions must be disabled on such platforms. All Thumb1 platforms support ARM instructions, so this is only relevant for Thumb2-only platforms (i.e., Cortex-M). Note that some packages require the context functions, so these will fail to build on these platforms. It is worth mentioning that musl also doesn't provide the context functions, and those are rarely used. Affected packages will be handled in later patches. [Peter: slightly reworded] Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com> |
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| README | ||
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