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On x86_64, we use the host compiler instead of the target compiler to build kvm-unit-tests, because it is built with -m32 and our target compiler doesn't support that. However, the compiler on Arch Linux is broken: it *always* builds with -fstack-protector, even when -ffreestanding is passed. However, when -fnostdlib is passed at link time (which is normally the case when building with -ffreestanding), it is not linked with the stack-protector library. This leads to a link time error: /usr/bin/ld: x86/realmode.o: in function `print_serial_u32': .../x86/realmode.c:104: undefined reference to `__stack_chk_fail' Since the entire package is built with -ffreestanding, it doesn't support stack-protector at all. Therefore, simply pass -fno-stack-protector explicitly on x86_64 to work around the bug in Arch Linux. Commitc0ffd16e4tried to do this, but got the condition wrong: -fno-stack-protector was passed in all cases *except* for x86_64. This commit fixes that, by inverting the condition and moving the --cross-prefix part to the else branch. Fixes: http://autobuild.buildroot.net/results/ca9576721214ecdce5622f2b7ec4fd4fc3699ac0/ Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> Cc: Fabrice Fontaine <fontaine.fabrice@gmail.com> Cc: Matthew Weber <matthew.weber@rockwellcollins.com> Reviewed-by: Matthew Weber <matthew.weber@rockwellcollins.com> Tested-by: Matthew Weber <matthew.weber@rockwellcollins.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com> (cherry picked from commitb8b7bd18ed) Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
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 http://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 Freenode IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches