$ARCH was introduced in 2018 by commit b5af84deaa ("scripts: add smp
builds to xtensa-build-all.sh"). At the time used autotools and
`./configure --with-arch=$ARCH` were used.
In January 2019 the build system was migrated to CMake over several
commits, notably commit 9840ecbbfe ("cmake: update
xtensa-build-all.sh") that switched xtensa-build-all.sh to CMake and
removed its only use of ARCH. Also note commit 82b4da291b ("cmake:
defconfigs support") which added a few CONFIG_SMP defconfigs and
commit 905bad4252 ("scripts: xtensa-build-all: Add support to force
build UP Arch") using override.config.
Much more recently in June 2020: commit fd506970cc ("zephyr: kconfig:
rename CONFIG_SMP -> CONFIG_MULTICORE")
Zawinski's Law of Software Envelopment: adding lines of code is much
easier than removing the same amount and would be very impractical
without git. This one was easy enough.
Signed-off-by: Marc Herbert <marc.herbert@intel.com>
e6c3dda61a
