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The boost-context module contains ARM assembly code, which uses ARM instructions. Therefore, on Thumb-2 only platforms (such as Cortex-M), the following build error occurs: libs/context/src/asm/make_arm_aapcs_elf_gas.S: Assembler messages: libs/context/src/asm/make_arm_aapcs_elf_gas.S:33: Error: unshifted register required -- `bic a1,a1,#15' libs/context/src/asm/make_arm_aapcs_elf_gas.S:42: Error: immediate value out of range To avoid this error, we make the boost-context module depend on BR2_ARM_CPU_HAS_ARM. Fixes: http://autobuild.buildroot.net/results/8f6770b59a343b9f710e9363b43227ee9f026660 Signed-off-by: Romain Naour <romain.naour@gmail.com> [Thomas: use BR2_ARM_CPU_HAS_ARM instead of a dependency on !BR2_ARM_CPU_ARMV7M.] Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.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