I’m running 2017-08-25-raspbian-stretch-preview-bpi-m2u-sd-emmc.img on a Banana Pi M2 Berry.
I need to build the kernel and various libraries to support HW video decoding.
I am following the instructions at https://bananapi.gitbooks.io/bpi-m2-ultra-open-source-single-board-computer/content/bpi-m2ultrasourcecodeongithub/bpi-berrybpi-ultra-how-to-alter-ubootkernel-from-github.html but option #1 (to Build all) fails (see below).
Can you tell me what I need to do to get builds to succeed? Should I be cross-compiling on eg Intel or should I do all builds directly on the bPi ?
drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_vsu.c:348:10: warning: passing argument 1 of ‘memcpy’ discards ‘volatile’ qualifier from pointer target type [-Wdiscarded-array-qualifiers] memcpy(&vsu_dev[sel][chno]->cvcoeff, ^ In file included from include/linux/string.h:17:0, from include/linux/dynamic_debug.h:111, from include/linux/kernel.h:14, from include/linux/cache.h:4, from include/linux/time.h:4, from include/linux/stat.h:18, from include/linux/module.h:10, from drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/../include.h:8, from drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_rtmx.h:16, from drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_scaler.h:16, from drivers/video/sunxi/disp2/disp/de/lowlevel_v2x/de_vsu.c:12: /home/ubuntu/BPI-M2U-bsp/linux-sunxi/arch/arm/include/asm/string.h:16:15: note: expected ‘void *’ but argument is of type ‘volatile union VSU_COEFF_REG (*)’ extern void * memcpy(void *, const void *, __kernel_size_t); ^ .......... make: Leaving directory '/home/ubuntu/BPI-M2U-bsp/linux-sunxi' Makefile:49: recipe for target 'kernel' failed make: *** [kernel] Error 2 Build success!