Enable -Wdeprecated in the cmake build now that LLVM (& Clang, Polly, and LLD) are...

This particularly helps enforce the C++ Rule of 5 (for new move ops this
is already an error, but for a type only using C++98 features (copy
ctor/assign, dtor) it is only deprecated, not invalid)

Applying the flag for any GCC compatible compiler - GCC doesn't warn on
the Rule of 5 cases that C++11 deprecates, but it doesn't have other
false positives so far as I could see (compiling with GCC 4.8 didn't
produce any -Wdeprecated warnings I could spot).

Reviewers: aaron.ballman

Differential Revision: http://reviews.llvm.org/D13314

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@248963 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/cmake/modules/HandleLLVMOptions.cmake b/cmake/modules/HandleLLVMOptions.cmake
index e0bea6470fb22f56eec2a17881adf343e29187ca..046187aa59d39460939f77b2b59dccaa3b663dea 100644 (file)
--- a/cmake/modules/HandleLLVMOptions.cmake
+++ b/cmake/modules/HandleLLVMOptions.cmake
@@ -364,7 +364,7 @@ if( MSVC )
 
 elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE )
   if (LLVM_ENABLE_WARNINGS)
-    append("-Wall -W -Wno-unused-parameter -Wwrite-strings" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
+    append("-Wall -W -Wno-unused-parameter -Wwrite-strings -Wdeprecated" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
     append("-Wcast-qual" CMAKE_CXX_FLAGS)
 
     # Turn off missing field initializer warnings for gcc to avoid noise from