mirror of
https://gitlab.com/buildroot.org/buildroot.git
synced 2026-08-18 13:23:39 -09:00
bdfdeea8e1
OpenCV probes the host compiler for LSX/LASX by trying to compile a
small test program with '-mlsx' / '-mlasx'. With Buildroot's toolchain
this probe succeeds even when the target CPU lacks the matching ISA
extension, and the resulting libraries then contain LSX/LASX
instructions. This causes SIGILL at runtime on, e.g., the LA264.
Map Buildroot's BR2_LOONGARCH_SIMD_* selection to OpenCV's
CPU_BASELINE / CPU_DISPATCH knobs:
BR2_LOONGARCH_SIMD_NONE -> no baseline, no dispatch
BR2_LOONGARCH_SIMD_LSX -> baseline = LSX, no dispatch
BR2_LOONGARCH_SIMD_LASX -> baseline = LSX, dispatch = LASX
The block is gated on BR2_loongarch64, so the existing auto detection
remains in effect for every other architecture.
Signed-off-by: Pengji Li <wjjsn@qq.com>
Reviewed-by: Woodrow Douglass <wdouglass@carnegierobotics.com>
Signed-off-by: Arnout Vandecappelle <arnout@rnout.be>
(cherry picked from commit b9d10eed1f)
Signed-off-by: Thomas Perale <thomas.perale@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