sim: warnings: enable -Wimplicit-fallthrough=5

It caught some legitimate bugs, so clearly it's helpful.

diff --git a/sim/configure b/sim/configure
index 53351bb..af37e1d 100755 (executable)
--- a/sim/configure
+++ b/sim/configure
@@ -15827,6 +15827,7 @@ build_warnings="-Wall -Wpointer-arith
 -Wempty-body -Wunused-but-set-parameter -Wunused-but-set-variable
 -Wno-sign-compare -Wno-error=maybe-uninitialized
 -Wno-error=deprecated-register
+-Wimplicit-fallthrough=5
 -Wduplicated-cond
 -Wmissing-declarations
 "

diff --git a/sim/m4/sim_ac_option_warnings.m4 b/sim/m4/sim_ac_option_warnings.m4
index 3da1c6a..bdb99c4 100644 (file)
--- a/sim/m4/sim_ac_option_warnings.m4
+++ b/sim/m4/sim_ac_option_warnings.m4
@@ -44,6 +44,7 @@ build_warnings="-Wall -Wpointer-arith
 dnl C++ -Wno-mismatched-tags
 -Wno-error=deprecated-register
 dnl C++ -Wsuggest-override
+-Wimplicit-fallthrough=5
 -Wduplicated-cond
 dnl -Wshadow=local
 dnl C++ -Wdeprecated-copy