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Buildroot commitf0862592b3added the dependency to BR2_USE_MMU in 2014. Upstream made fork() optional in 2022:91f75fc026This change reveals a previously hidden build error with the toolchain bootlin-armv7m-uclibc: src/libmpg123/synth_arm_accurate.S: Assembler messages: src/libmpg123/synth_arm_accurate.S:22: Error: selected processor does not support ARM opcodes src/libmpg123/synth_arm_accurate.S:31: Error: attempt to use an ARM instruction on a Thumb-only processor -- `stmfd sp!,{r4,r5,r6,r7,r8,r9,r10,r11,lr}' src/libmpg123/synth_arm_accurate.S:33: Error: attempt to use an ARM instruction on a Thumb-only processor -- `add r0,r0,#64' [...] To fix the problem we limit ARM code to BR2_ARM_CPU_HAS_ARM. Signed-off-by: Bernd Kuhls <bernd@kuhls.net> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> (cherry picked from commitfca0899dd6) Signed-off-by: Raphaël Mélotte <raphael.melotte@mind.be>
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 https://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 OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches