Prior patches in 54dc5314e8
and 6db6190002 fixed the default
system double for i686 and ppc/ppc64. This also patch also covers
32 bit arm and mips. ARM cpu names are taken from host_machine.cpu()
for a lack of a better option, but host_machine.cpu_family() is
preferred, since that is supposed to be somewhat standard for cross
files. Endianness is handled correctly by looking at host_machine.endian().
This also updates the documentation to be up to date to how system cpu
is translated from the host_machine specification.
I've missed this while reviewing 6db6190002.
I only built big endian ppc64, so that didn't occur to me.
From meson manual:
> Those porting from autotools should note that Meson does not add
> endianness to the name of the cpu_family. For example, autotools will
> call little endian PPC64 "ppc64le", Meson will not, you must also check
> the .endian() value of the machine for this information.
This code should handle that correctly.
