[lld] 3eec657 - Revert "Enable -Wsuggest-override in the LLVM build" and the follow-ups.

Hans Wennborg via llvm-commits llvm-commits at lists.llvm.org
Wed Jul 22 11:25:13 PDT 2020 

Author: Hans Wennborg
Date: 2020-07-22T20:23:58+02:00
New Revision: 3eec65782575a1284391e447142fd004dd5de4a9

URL: https://github.com/llvm/llvm-project/commit/3eec65782575a1284391e447142fd004dd5de4a9
DIFF: https://github.com/llvm/llvm-project/commit/3eec65782575a1284391e447142fd004dd5de4a9.diff

LOG: Revert "Enable -Wsuggest-override in the LLVM build" and the follow-ups.

After lots of follow-up fixes, there are still problems, such as
-Wno-suggest-override getting passed to the Windows Resource Compiler
because it was added with add_definitions in the CMake file.

Rather than piling on another fix, let's revert so this can be re-landed
when there's a proper fix.

This reverts commit 21c0b4c1e8d6a171899b31d072a47dac27258fc5.
This reverts commit 81d68ad27b29b1e6bc93807c6e42b14e9a77eade.
This reverts commit a361aa5249856e333a373df90947dabf34cd6aab.
This reverts commit fa42b7cf2949802ff0b8a63a2e111a2a68711067.
This reverts commit 955f87f947fda3072a69b0b00ca83c1f6a0566f6.
This reverts commit 8b16e45f66e24e4c10e2cea1b70d2b85a7ce64d5.
This reverts commit 308a127a38d1111f3940420b98ff45fc1c17715f.
This reverts commit 274b6b0c7a8b584662595762eaeff57d61c6807f.
This reverts commit 1c7037a2a5576d0bb083db10ad947a8308e61f65.

Added: 
    

Modified: 
    clang-tools-extra/clangd/unittests/CMakeLists.txt
    clang-tools-extra/unittests/CMakeLists.txt
    clang/unittests/CMakeLists.txt
    compiler-rt/cmake/Modules/AddCompilerRT.cmake
    compiler-rt/cmake/config-ix.cmake
    flang/unittests/CMakeLists.txt
    libcxx/CMakeLists.txt
    libcxxabi/CMakeLists.txt
    lld/unittests/CMakeLists.txt
    lldb/unittests/CMakeLists.txt
    llvm/cmake/modules/HandleLLVMOptions.cmake
    llvm/lib/Testing/Support/CMakeLists.txt
    llvm/unittests/CMakeLists.txt
    llvm/utils/benchmark/CMakeLists.txt
    llvm/utils/unittest/CMakeLists.txt
    mlir/unittests/CMakeLists.txt
    parallel-libs/acxxel/CMakeLists.txt
    polly/unittests/CMakeLists.txt

Removed: 
    


################################################################################
diff  --git a/clang-tools-extra/clangd/unittests/CMakeLists.txt b/clang-tools-extra/clangd/unittests/CMakeLists.txt
index 8a4a0fb37fc6..c25e2b7f8103 100644
--- a/clang-tools-extra/clangd/unittests/CMakeLists.txt
+++ b/clang-tools-extra/clangd/unittests/CMakeLists.txt
@@ -22,10 +22,6 @@ if(CLANG_BUILT_STANDALONE)
   endif()
 endif()
 
-if (CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG)
-  add_definitions("-Wno-suggest-override")
-endif()
-
 if (CLANGD_ENABLE_REMOTE)
   include_directories(${CMAKE_CURRENT_BINARY_DIR}/../index/remote)
   add_definitions(-DGOOGLE_PROTOBUF_NO_RTTI=1)

diff  --git a/clang-tools-extra/unittests/CMakeLists.txt b/clang-tools-extra/unittests/CMakeLists.txt
index 751827cd2a0f..086a68e63830 100644
--- a/clang-tools-extra/unittests/CMakeLists.txt
+++ b/clang-tools-extra/unittests/CMakeLists.txt
@@ -5,10 +5,6 @@ function(add_extra_unittest test_dirname)
   add_unittest(ExtraToolsUnitTests ${test_dirname} ${ARGN})
 endfunction()
 
-if (CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG)
-  add_definitions("-Wno-suggest-override")
-endif()
-
 add_subdirectory(clang-apply-replacements)
 add_subdirectory(clang-change-namespace)
 add_subdirectory(clang-doc)

diff  --git a/clang/unittests/CMakeLists.txt b/clang/unittests/CMakeLists.txt
index 64168f44f843..4c222e24599f 100644
--- a/clang/unittests/CMakeLists.txt
+++ b/clang/unittests/CMakeLists.txt
@@ -10,10 +10,6 @@ if(CLANG_BUILT_STANDALONE)
   endif()
 endif()
 
-if (CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG)
-  add_definitions("-Wno-suggest-override")
-endif()
-
 # add_clang_unittest(test_dirname file1.cpp file2.cpp)
 #
 # Will compile the list of files together and link against the clang

diff  --git a/compiler-rt/cmake/Modules/AddCompilerRT.cmake b/compiler-rt/cmake/Modules/AddCompilerRT.cmake
index efb660818270..dab55707338a 100644
--- a/compiler-rt/cmake/Modules/AddCompilerRT.cmake
+++ b/compiler-rt/cmake/Modules/AddCompilerRT.cmake
@@ -403,7 +403,6 @@ set(COMPILER_RT_GMOCK_CFLAGS
 
 append_list_if(COMPILER_RT_DEBUG -DSANITIZER_DEBUG=1 COMPILER_RT_UNITTEST_CFLAGS)
 append_list_if(COMPILER_RT_HAS_WCOVERED_SWITCH_DEFAULT_FLAG -Wno-covered-switch-default COMPILER_RT_UNITTEST_CFLAGS)
-append_list_if(COMPILER_RT_HAS_WSUGGEST_OVERRIDE_FLAG -Wno-suggest-override COMPILER_RT_UNITTEST_CFLAGS)
 
 if(MSVC)
   # gtest use a lot of stuff marked as deprecated on Windows.

diff  --git a/compiler-rt/cmake/config-ix.cmake b/compiler-rt/cmake/config-ix.cmake
index 0a27910ed494..f535123351d6 100644
--- a/compiler-rt/cmake/config-ix.cmake
+++ b/compiler-rt/cmake/config-ix.cmake
@@ -106,7 +106,6 @@ check_cxx_compiler_flag("-Werror -Wnon-virtual-dtor"   COMPILER_RT_HAS_WNON_VIRT
 check_cxx_compiler_flag("-Werror -Wvariadic-macros"    COMPILER_RT_HAS_WVARIADIC_MACROS_FLAG)
 check_cxx_compiler_flag("-Werror -Wunused-parameter"   COMPILER_RT_HAS_WUNUSED_PARAMETER_FLAG)
 check_cxx_compiler_flag("-Werror -Wcovered-switch-default" COMPILER_RT_HAS_WCOVERED_SWITCH_DEFAULT_FLAG)
-check_cxx_compiler_flag("-Werror -Wsuggest-override"   COMPILER_RT_HAS_WSUGGEST_OVERRIDE_FLAG)
 check_cxx_compiler_flag(-Wno-pedantic COMPILER_RT_HAS_WNO_PEDANTIC)
 
 check_cxx_compiler_flag(/W4 COMPILER_RT_HAS_W4_FLAG)

diff  --git a/flang/unittests/CMakeLists.txt b/flang/unittests/CMakeLists.txt
index 0d52bc054a8c..d53d155f2f2b 100644
--- a/flang/unittests/CMakeLists.txt
+++ b/flang/unittests/CMakeLists.txt
@@ -5,10 +5,6 @@ function(add_flang_unittest test_dirname)
   add_unittest(FlangUnitTests ${test_dirname} ${ARGN})
 endfunction()
 
-if (CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG)
-  add_definitions("-Wno-suggest-override")
-endif()
-
 add_subdirectory(Optimizer)
 add_subdirectory(Decimal)
 add_subdirectory(Evaluate)

diff  --git a/libcxx/CMakeLists.txt b/libcxx/CMakeLists.txt
index 3ba09fd87f6a..caf655d6799a 100644
--- a/libcxx/CMakeLists.txt
+++ b/libcxx/CMakeLists.txt
@@ -578,7 +578,6 @@ function(cxx_add_warning_flags target)
     target_add_compile_flags_if_supported(${target} PRIVATE
       -Wno-user-defined-literals
       -Wno-covered-switch-default
-      -Wno-suggest-override
       -Wno-ignored-attributes # FIXME: Caused by _LIBCPP_NODEBUG_TYPE not being supported on older clangs
     )
     if (LIBCXX_TARGETING_CLANG_CL)
@@ -603,8 +602,7 @@ function(cxx_add_warning_flags target)
     target_add_compile_flags_if_supported(${target} PRIVATE
       -Wno-literal-suffix
       -Wno-c++14-compat
-      -Wno-noexcept-type
-      -Wno-suggest-override)
+      -Wno-noexcept-type)
   endif()
   if (LIBCXX_ENABLE_WERROR)
     target_add_compile_flags_if_supported(${target} PRIVATE -Werror)

diff  --git a/libcxxabi/CMakeLists.txt b/libcxxabi/CMakeLists.txt
index c28c438002d4..e4e20d950b89 100644
--- a/libcxxabi/CMakeLists.txt
+++ b/libcxxabi/CMakeLists.txt
@@ -283,8 +283,6 @@ add_compile_flags_if_supported(-Wunused-variable)
 add_compile_flags_if_supported(-Wwrite-strings)
 add_compile_flags_if_supported(-Wundef)
 
-add_compile_flags_if_supported(-Wno-suggest-override)
-
 if (LIBCXXABI_ENABLE_WERROR)
   add_compile_flags_if_supported(-Werror)
   add_compile_flags_if_supported(-WX)

diff  --git a/lld/unittests/CMakeLists.txt b/lld/unittests/CMakeLists.txt
index 3330f7c28aeb..84d35d43f4e8 100644
--- a/lld/unittests/CMakeLists.txt
+++ b/lld/unittests/CMakeLists.txt
@@ -12,9 +12,5 @@ function(add_lld_unittest test_dirname)
   target_link_libraries(${test_dirname} ${LLVM_COMMON_LIBS})
 endfunction()
 
-if (CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG)
-  add_definitions("-Wno-suggest-override")
-endif()
-
 add_subdirectory(DriverTests)
 add_subdirectory(MachOTests)

diff  --git a/lldb/unittests/CMakeLists.txt b/lldb/unittests/CMakeLists.txt
index 3a31559463d1..6422b726ca69 100644
--- a/lldb/unittests/CMakeLists.txt
+++ b/lldb/unittests/CMakeLists.txt
@@ -5,10 +5,6 @@ add_dependencies(lldb-test-deps LLDBUnitTests)
 include_directories(${LLDB_SOURCE_ROOT})
 include_directories(${LLDB_PROJECT_ROOT}/unittests)
 
-if (CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG)
-  add_definitions("-Wno-suggest-override")
-endif()
-
 set(LLDB_GTEST_COMMON_INCLUDE ${CMAKE_CURRENT_SOURCE_DIR}/gtest_common.h)
 if (MSVC)
   list(APPEND LLVM_COMPILE_FLAGS /FI ${LLDB_GTEST_COMMON_INCLUDE})

diff  --git a/llvm/cmake/modules/HandleLLVMOptions.cmake b/llvm/cmake/modules/HandleLLVMOptions.cmake
index 62dd0ef79cf4..2e249593e12f 100644
--- a/llvm/cmake/modules/HandleLLVMOptions.cmake
+++ b/llvm/cmake/modules/HandleLLVMOptions.cmake
@@ -672,21 +672,6 @@ if (LLVM_ENABLE_WARNINGS AND (LLVM_COMPILER_IS_GCC_COMPATIBLE OR CLANG_CL))
   # Enable -Wdelete-non-virtual-dtor if available.
   add_flag_if_supported("-Wdelete-non-virtual-dtor" DELETE_NON_VIRTUAL_DTOR_FLAG)
 
-  # Enable -Wsuggest-override if it's available, and only if it doesn't
-  # suggest adding 'override' to functions that are already marked 'final'
-  # (which means it is disabled for GCC < 9.2).
-  check_cxx_compiler_flag("-Wsuggest-override" CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG)
-  if (CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG)
-    set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
-    set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Werror=suggest-override")
-    CHECK_CXX_SOURCE_COMPILES("class base {public: virtual void anchor();};
-                               class derived : base {public: void anchor() final;};
-                               int main() { return 0; }"
-                              CXX_WSUGGEST_OVERRIDE_ALLOWS_ONLY_FINAL)
-    set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
-    append_if(CXX_WSUGGEST_OVERRIDE_ALLOWS_ONLY_FINAL "-Wsuggest-override" CMAKE_CXX_FLAGS)
-  endif()
-
   # Check if -Wcomment is OK with an // comment ending with '\' if the next
   # line is also a // comment.
   set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})

diff  --git a/llvm/lib/Testing/Support/CMakeLists.txt b/llvm/lib/Testing/Support/CMakeLists.txt
index 4d2f46e9b79d..fe460aeefc91 100644
--- a/llvm/lib/Testing/Support/CMakeLists.txt
+++ b/llvm/lib/Testing/Support/CMakeLists.txt
@@ -15,10 +15,6 @@ add_llvm_library(LLVMTestingSupport
   Support
   )
 
-if (CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG)
-  add_definitions("-Wno-suggest-override")
-endif()
-
 include_directories(${LLVM_MAIN_SRC_DIR}/utils/unittest/googletest/include)
 include_directories(${LLVM_MAIN_SRC_DIR}/utils/unittest/googlemock/include)
 target_link_libraries(LLVMTestingSupport PRIVATE gtest)

diff  --git a/llvm/unittests/CMakeLists.txt b/llvm/unittests/CMakeLists.txt
index c1e02313d044..d7dbaeaa32fe 100644
--- a/llvm/unittests/CMakeLists.txt
+++ b/llvm/unittests/CMakeLists.txt
@@ -14,10 +14,6 @@ function(add_llvm_target_unittest test_dir_name)
   add_llvm_unittest(${test_dir_name} DISABLE_LLVM_LINK_LLVM_DYLIB ${ARGN})
 endfunction()
 
-if (CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG)
-  add_definitions("-Wno-suggest-override")
-endif()
-
 add_subdirectory(ADT)
 add_subdirectory(Analysis)
 add_subdirectory(AsmParser)

diff  --git a/llvm/utils/benchmark/CMakeLists.txt b/llvm/utils/benchmark/CMakeLists.txt
index ce1d38e6862a..38bc8c6bc956 100644
--- a/llvm/utils/benchmark/CMakeLists.txt
+++ b/llvm/utils/benchmark/CMakeLists.txt
@@ -156,10 +156,6 @@ else()
     add_cxx_compiler_flag(-fno-exceptions)
   endif()
 
-  if (CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG)
-    add_cxx_compiler_flag(-Wno-suggest-override)
-  endif()
-
   if (HAVE_CXX_FLAG_FSTRICT_ALIASING)
     if (NOT CMAKE_CXX_COMPILER_ID STREQUAL "Intel") #ICC17u2: Many false positives for Wstrict-aliasing
       add_cxx_compiler_flag(-Wstrict-aliasing)

diff  --git a/llvm/utils/unittest/CMakeLists.txt b/llvm/utils/unittest/CMakeLists.txt
index 36761a60d9f7..5aad048f2c35 100644
--- a/llvm/utils/unittest/CMakeLists.txt
+++ b/llvm/utils/unittest/CMakeLists.txt
@@ -43,9 +43,6 @@ endif()
 if(CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG)
   add_definitions("-Wno-covered-switch-default")
 endif()
-if(CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG)
-  add_definitions("-Wno-suggest-override")
-endif()
 
 set(LLVM_REQUIRES_RTTI 1)
 add_definitions( -DGTEST_HAS_RTTI=0 )

diff  --git a/mlir/unittests/CMakeLists.txt b/mlir/unittests/CMakeLists.txt
index 69b58420dfdb..851092c5b56a 100644
--- a/mlir/unittests/CMakeLists.txt
+++ b/mlir/unittests/CMakeLists.txt
@@ -5,10 +5,6 @@ function(add_mlir_unittest test_dirname)
   add_unittest(MLIRUnitTests ${test_dirname} ${ARGN})
 endfunction()
 
-if (CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG)
-  add_definitions("-Wno-suggest-override")
-endif()
-
 add_subdirectory(Analysis)
 add_subdirectory(Dialect)
 add_subdirectory(IR)

diff  --git a/parallel-libs/acxxel/CMakeLists.txt b/parallel-libs/acxxel/CMakeLists.txt
index f2ebe4833972..547dd62d2fbf 100644
--- a/parallel-libs/acxxel/CMakeLists.txt
+++ b/parallel-libs/acxxel/CMakeLists.txt
@@ -36,9 +36,6 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 # Add warning flags.
 set(CMAKE_CXX_FLAGS  "${CMAKE_CXX_FLAGS} -Wall -Wextra")
-if (CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG)
-  add_definitions("-Wno-suggest-override")
-endif()
 
 add_library(
     acxxel

diff  --git a/polly/unittests/CMakeLists.txt b/polly/unittests/CMakeLists.txt
index 1a0584976cbb..fac70383de94 100644
--- a/polly/unittests/CMakeLists.txt
+++ b/polly/unittests/CMakeLists.txt
@@ -19,10 +19,6 @@ function(add_polly_unittest test_name)
   target_link_libraries(${test_name} PRIVATE Polly)
 endfunction()
 
-if (CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG)
-  add_definitions("-Wno-suggest-override")
-endif()
-
 add_subdirectory(Isl)
 add_subdirectory(Flatten)
 add_subdirectory(DeLICM)

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