I see this in configure.in: AC_ARG_ENABLE(nonportable-atomics, [ --enable-nonportable-atomics Use optimized atomic code which may produce nonportable binaries], [if test $enableval = yes; then force_generic_atomics=no else force_generic_atomics=yes fi ], [case $host_cpu in i[[456]]86) force_generic_atomics=yes ;; *) force_generic_atomics=no ;; esac ])
I was wondering why the three host_cpus i486, i586, and i686 have special treatment for the default setting as compared to all other cpu architectures?
