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With Microblaze gcc version <= 9.x, the build of flannel fails due to gcc bug 68485: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68485. To avoid this, the flann package has a !BR2_microblaze dependency. However, gcc bug 68485 only triggers when optimization is enabled, so we can work around the issue by passing -O0, which is what we do in other Buildroot packages to work around this bug. So, this commit passes -O0 when BR2_TOOLCHAIN_HAS_GCC_BUG_68485, and re-enables flann on Microblaze. Note that the comment was talking about gcc bug 69401, but this gcc bug is a duplicate of 68485. Since all Buildroot packages now use the reference to gcc bug 68485 and the option is named BR2_TOOLCHAIN_HAS_GCC_BUG_68485, we use this naming as well for flann. Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.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