Compiling for grub-pc test of menu on Apple, --wth-platform=pc, I get this stopper in grub-install (after successful make && make install). OS is ubuntu904 on imac81.
address@hidden:~/src/grub/buildpc$ sudo ./grub-install --no-floppy --force /dev/sda ./grub-install: 312: realpath: not found
( I got the same back from start of the menu tests with git branch master, the change to realpath problem, then I went to efi tests, no problems).
I had no problem --with-platform=pc from the new Bazaar mirror bzr branch http://bzr.savannah.gnu.org/r/grub/ which compiles installs and boots grub-pc with no errors .