Gentoo supports the following platforms:
alpha
amd64
arm
hppa
ia64
m68k
mips
ppc
ppc64
ppc-macos
s390
sh
sparc
x86
In the Gentoo installation-packages (ebuilds),
such a keyword shows if the package supports that platform.
A preceding '~' marks the package being in a testing state
for that platform, while a '-' marks it as non-working.
e.g.
"x86" means it's in a working state on the x86 platform
"~x86" means it's in a testing state on the x86 platform
"-x86" means it is not working on the x86 platform
Which platforms does autotools-argyll support in the three states?