On 2 January 2014 17:00, Richard W.M. Jones <rjones@xxxxxxxxxx> wrote: > On Thu, Jan 02, 2014 at 04:37:45PM +0530, Sandeepa Prabhu wrote: >> Hi, >> >> I am trying to build kernel on fc19 aarch64 image based on v8 Foundation model. >> kernel branch is based on "armv8-uefi-v3.13rc" and toolchain: gcc >> version 4.8.1 20130920 (Red Hat 4.8.1-10) (GCC) - using 8GB RAM. >> >> Kernel build is taking for me more than 12 hours, and adding more >> threads (-j6 etc) does not improve the build speed. Is this expected ? > > Yes :-( > >> or is there a step to improve kernel build? > > qemu-arm64 userspace emulation[1] is a little bit faster than the > Foundation Model, but (a) it's limited to userspace emulation (fine > for compiling things) and (b) it's still damn slow. It will still > take you hours to compile this way. > > So ... cross-compiling, assuming you just want to build the kernel and > don't want to build an RPM. On your fast x86-64 host, install > gcc-aarch64-linux-gnu and do something like this: > > make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- Ok, so cross-compiling would work for me, how do I install the built kernel image (EFI version) on the disk image, is it just copying vmlinux onto /boot/vmlinux-***? Thanks, Sandeepa > > Rich. > > [1] http://rwmj.wordpress.com/2013/12/22/how-to-run-aarch64-binaries-on-an-x86-64-host-using-qemu-userspace-emulation/#content > > -- > Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones > Fedora Windows cross-compiler. Compile Windows programs, test, and > build Windows installers. Over 100 libraries supported. > http://fedoraproject.org/wiki/MinGW _______________________________________________ arm mailing list arm@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/arm
