[build] Stop exempting -Wimplicit-fallthrough warnings

Author: bryanpkc

CMakeLists.txt

@@ -285,8 +285,8 @@ if (LLVM_COMPILER_IS_GCC_COMPATIBLE)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -fno-common -Woverloaded-virtual -Wcast-qual -fno-strict-aliasing -pedantic -Wno-long-long -Wall -W -Wno-unused-parameter -Wwrite-strings")
   option(WITH_WERROR "Compile with '-Werror' C/C++ compiler flag" ON)
   if (WITH_WERROR)
-     set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -Werror -Wno-error=sign-compare -Wno-error=pointer-sign -Wno-error=incompatible-pointer-types -Wno-error=string-conversion -Wno-error=misleading-indentation -Wno-error=dangling-else -Wno-error=c99-extensions -Wno-error=deprecated-register -Wno-error=format -Wno-error=format-pedantic -Wno-error=tautological-constant-out-of-range-compare -Wno-error=switch -Wno-error=covered-switch-default -Wno-error=enum-compare -Wno-error=char-subscripts -Wno-error=logical-op-parentheses -Wno-error=parentheses -Wno-error=array-bounds -Wno-error=fortify-source -Wno-error=comment -Wno-error=implicit-fallthrough")
-     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror -Wno-error=sign-compare -Wno-error=pointer-sign -Wno-error=incompatible-pointer-types -Wno-error=string-conversion -Wno-error=misleading-indentation -Wno-error=dangling-else -Wno-error=c99-extensions -Wno-error=deprecated-register -Wno-error=format -Wno-error=format-pedantic -Wno-error=tautological-constant-out-of-range-compare -Wno-error=switch -Wno-error=covered-switch-default -Wno-error=enum-compare -Wno-error=char-subscripts -Wno-error=logical-op-parentheses -Wno-error=parentheses -Wno-error=array-bounds -Wno-error=fortify-source -Wno-error=comment -Wno-error=implicit-fallthrough")
+     set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -Werror -Wno-error=sign-compare -Wno-error=pointer-sign -Wno-error=incompatible-pointer-types -Wno-error=string-conversion -Wno-error=misleading-indentation -Wno-error=dangling-else -Wno-error=c99-extensions -Wno-error=deprecated-register -Wno-error=format -Wno-error=format-pedantic -Wno-error=tautological-constant-out-of-range-compare -Wno-error=switch -Wno-error=covered-switch-default -Wno-error=enum-compare -Wno-error=char-subscripts -Wno-error=logical-op-parentheses -Wno-error=parentheses -Wno-error=array-bounds -Wno-error=fortify-source -Wno-error=comment")
+     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror -Wno-error=sign-compare -Wno-error=pointer-sign -Wno-error=incompatible-pointer-types -Wno-error=string-conversion -Wno-error=misleading-indentation -Wno-error=dangling-else -Wno-error=c99-extensions -Wno-error=deprecated-register -Wno-error=format -Wno-error=format-pedantic -Wno-error=tautological-constant-out-of-range-compare -Wno-error=switch -Wno-error=covered-switch-default -Wno-error=enum-compare -Wno-error=char-subscripts -Wno-error=logical-op-parentheses -Wno-error=parentheses -Wno-error=array-bounds -Wno-error=fortify-source -Wno-error=comment")
      if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND CMAKE_CXX_COMPILER_VERSION GREATER_EQUAL 13)
        set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -Wno-error=unused-but-set-variable")
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-error=unused-but-set-variable")