It fails on qemuarm during do_configure.
| checking for compile options to get strict alignment...
-mno-unaligned-access
| checking if compiler generates unaligned accesses... no
| checking if C symbols get an underscore after compilation... no
| checking whether target compiler is working...
From: Andrei Gherzan
Grub tries to force the compilation in softfp mode for some known target
CPU. That is because it doesn't use floats or doubles and there are
known limitations of using a configuration with hardfp. There are though
target CPUs that grub won't know how to configure failing
