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c35f157486
Xenomai has two mutually exclusive cores: - Cobalt: dual-kernel approach: patched kernel + userland - Mercury: only userland In the Cobalt core, not all architectures are supported. This is the source of the existing ARCH_SUPPORTS variable. In the Mercury core, there is no imposed architecture restriction. Rename the XENOMAI_ARCH_SUPPORTS flag to XENOMAI_COBALT_ARCH_SUPPORTS and move its check from the Xenomai package to the Cobalt core. Nevertheless, even for Mercury, there are some restrictions: - pthread_atfork is used, which requires an MMU - sync functions like __sync_sub_and_fetch and __sync_add_and_fetch are expected. As the corresponding 'linux extension' selects Xenomai, we add the MMU and sync dependencies there too. They may or may not already be covered by XENOMAI_COBALT_ARCH_SUPPORTS flag. Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>