ExploWare

It is working if you interpret this answer correctly: create a file in a known and accessible location on a saved filesystem, for example /etc/sys_info In that file place the following lines: sunxi_platform : Sun8iw7p1 sunxi_secure : normal sunxi_chipid : 2c21020e786746240000540000000000 sunxi_chiptype : 00000042 sunxi_batchno : 1 sunxi_board_id : 1(0) Then, modify the source-code you downloaded from github: in the file 'wiringPi/boardtype_friendlyelec.c' look for the lines: if (!(f = fopen("/sys/class/sunxi_info/sys_info", "r"))) { LOGE("open /sys/class/sunxi_info/sys_info failed."); return -1; } Add two lines, make it look like this: if (!(f = fopen("/sys/class/sunxi_info/sys_info", "r"))) { if (!(f = fopen("/etc/sys_info", "r"))) { LOGE("open /sys/class/sunxi_info/sys_info failed."); return -1; } } save and run the './build' command and SUCCESS. gpio readall works without errors.