fe187de9bd
GCC 7 generates spurious fallthrough warnings in nested switch blocks where the inner switch block return. There is already a GCC fix [1] submitted for review but, until it is merged into GCC trunk, GEM5 will not build with GCC 7 due to these fallthrough warnings. This patch silences the spurious fallthrough warnings by appending a M5_UNREACHABLE statement in the outer switch cases. Note there is another GEM5 patch [2] to fix other fallthrough warnings. [1] https://gcc.gnu.org/ml/gcc-patches/2018-02/msg01105.html [2] https://gem5-review.googlesource.com/c/public/gem5/+/8541 Change-Id: I97cd8bfa90a88e93cee60cf27a8c93611d11a242 Signed-off-by: Chun-Chen Hsu <chunchenhsu@google.com> Reviewed-on: https://gem5-review.googlesource.com/9101 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>