On Mon, Nov 28, 2016 at 7:42 PM, Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> wrote: > On 2016-11-28 15:13:02 [+0530], $rik@nth wrote: >> Hi All, > Hi, > > I suggest to set a proper From: in your mail client. > >> I am trying to cross compile rt-tests on Ubuntu with 64bit cross gcc >> tool chain and ended up with below error (Able to compile successfully >> with 32bit tool chain). Can someone help clarifying the below error? >> Is this the issue with syscalls or with linux kernel version. How to >> get it compile successfully for 64bit ARCH. >> >> aarch64-linux-gnu-gcc-4.8 -D VERSION=1.0 -c src/lib/rt-sched.c -Wall >> -Wno-nonnull -O2 -D_GNU_SOURCE -Isrc/include -o bld/rt-sched.o >> src/lib/rt-sched.c: In function âsched_setattrâ: >> src/lib/rt-sched.c:34:17: error: â__NR_sched_setattrâ undeclared >> (first use in this function) >> return syscall(__NR_sched_setattr, pid, attr, flags); > > It works here: > aarch64-linux-gnu-gcc -D VERSION=1.0 -c src/lib/rt-sched.c -Wall > -Wno-nonnull -O2 -D_GNU_SOURCE -Isrc/include -o bld/rt-sched.o > > with gcc version 6.2.1 20161124 (Debian 6.2.1-5). > I assume your toolchain is too old. __NR_sched_setattr was added in > v3.14 so I assume your kernel headers are pre v3.14. That makes sense.. mine is having little old gcc. But strange thing, Why 32bit compiler is not returning such error. arm-linux-gnueabihf-gcc (Ubuntu/Linaro 4.8.4-2ubuntu1~14.04.1) 4.8.4 aarch64-linux-gnu-gcc (Ubuntu/Linaro 4.8.4-2ubuntu1~14.04.1) 4.8.4 > > Sebastian -- Thanks & Regards, M.Srikanth Kumar. -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
