While building IPXE (qemu requisite) using sys-devel/gcc-4.8.1-r2 with hardened USE flag enabled, I got the following message: [snip] arch/i386/image/elfboot.c: In function ‘elfboot_exec’: arch/i386/image/elfboot.c:74:1: error: bp cannot be used in asm here } ^ arch/i386/image/elfboot.c:74:1: error: bp cannot be used in asm here make: *** [bin/elfboot.o] Error 1 arch/i386/image/bootsector.c: In function ‘call_bootsector’: arch/i386/image/bootsector.c:128:1: error: bp cannot be used in asm here } ^ make: *** [bin/bootsector.o] Error 1 [snip] This is caused due GCC isn't allowing to use BP/EBP in the clobber list, complaining about that. I wrote a patch and sent upstream, it got merged into their git repository here: https://git.ipxe.org/ipxe.git/commitdiff/cba22d36b77da53890bd65fdadd0e63925687af0 As upstream has not released any new version which fixes the issue for now, a new "sys-firmware/ipxe-1.0.0_p20130624-r1" ebuild which patches the source with upstrem patch. Reproducible: Always Steps to Reproduce: 1. switch to hardened gcc 4.8.2-r1 2. emerge ipxe
Created attachment 360364 [details, diff] ipxe-1.0.0_p20130624-remove-ebp-from-clobber.patch
(In reply to Victor Roman Archidona from comment #1) > Created attachment 360364 [details, diff] [details, diff] > ipxe-1.0.0_p20130624-remove-ebp-from-clobber.patch ipxe-1.0.0_p20130624-r1 from funtoo-overlay (which implements the patch) on hardened profile with gcc-4.8.1-r1 (from main gentoo overlay) builds successfully. Not sure if it runs correctly yet.
(In reply to Victor Roman Archidona from comment #1) > Created attachment 360364 [details, diff] [details, diff] > ipxe-1.0.0_p20130624-remove-ebp-from-clobber.patch --^ This patch does not to match the sources of ipxe-1.0.0_p20130624.ebuild. The patch from the ipxe repository (as referenced in comment #1) however does, and the build succeeds using gcc-4.8.1-r1 on hardened.
Bumped the version in tree. Thanks for the report.
