Using Gentoo with clang on a MBR system I have come across an extra string the content /lib/ld-linux.so.2 is being added to /usr/lib/grub/i386-pc/diskboot.img and /usr/lib/grub/i386-pc/boot.img taking it over 512 bytes meaning it can't be used on a MBR system.
You can use truncate to remove the extra string then it will install and boot correctly but I am highlighting this here in hopes of a better fix. Steps to reproduce in Gentoo: 1. Use a clang stage3 on a MBR system. 2. emerge -va sys-boot/grub 3. grub-install /dev/sda Error: Installing for i386-pc platform. grub-install: error: diskboot.img size must be 512 bytes. Workaround: 1. truncate -s 512 /usr/lib/grub/i386-pc/diskboot.img 2. truncate -s 512 /usr/lib/grub/i386-pc/boot.img 3. grub-install /dev/sda I'm not really sure what files I can attach to help debugging this one but if you can think of any please ask for them.
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