get_isa() in get-stack.sh is as follows:
# determines the the CPU's instruction set
get_isa() {
if uname -m | grep -Eq 'armv[78]l?' ; then
echo arm
elif uname -m | grep -q aarch64 ; then
echo aarch64
else
echo x86
fi
}
get_isa() is used by is_x86_64() which, in turn, is used by do_distro() (called in the 'Linux' limb of do_os()).
get_isa() assumes that if the output of uname -m (the machine hardware name) is not armv6l, armv7l or aarch64 then it is x86_64 (or x86). However, this Wikipedia table indicates that other values are possible when uname -s (the kernel name) is Linux, including arm6l, sparc64,ppc64,i686,ppc,k1om, and 'mips.
It has been suggested that this is a 'bug waiting to happen'.
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