commit c22b988e59b79d9b67956cd9711bb37c5a88c59f
author Reid Kleckner <rnk@google.com> Thu Nov 01 20:31:44 2018 +0000
committer Reid Kleckner <rnk@google.com> Thu Nov 01 20:31:44 2018 +0000
tree 08e593780e0acaef2cee370e5a585239e797aaa4
parent 4d0059c09bdc2ae561000ac515ed93184870184f

Enable -Wimplicit-fallthrough for clang as well as GCC

All instances of this warning should already be fixed across all LLVM
subprojects, at least on Linux.

llvm-svn: 345887

llvm/cmake/modules/HandleLLVMOptions.cmake

diff --git a/llvm/cmake/modules/HandleLLVMOptions.cmake b/llvm/cmake/modules/HandleLLVMOptions.cmake
index 05db1b0..b590f76 100644
--- a/llvm/cmake/modules/HandleLLVMOptions.cmake
+++ b/llvm/cmake/modules/HandleLLVMOptions.cmake
@@ -580,6 +580,7 @@
     append("-Wno-long-long" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
   endif()
 
+  add_flag_if_supported("-Wimplicit-fallthrough" IMPLICIT_FALLTHROUGH_FLAG)
   add_flag_if_supported("-Wcovered-switch-default" COVERED_SWITCH_DEFAULT_FLAG)
   append_if(USE_NO_UNINITIALIZED "-Wno-uninitialized" CMAKE_CXX_FLAGS)
   append_if(USE_NO_MAYBE_UNINITIALIZED "-Wno-maybe-uninitialized" CMAKE_CXX_FLAGS)