[arrow] branch main updated: GH-35651: [C++] Suppress self-move warning introduced in gcc 13 (#36328)

[apitrou]

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apitrou pushed a commit to branch main
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The following commit(s) were added to refs/heads/main by this push:
     new 8b4a548baf GH-35651: [C++] Suppress self-move warning introduced in 
gcc 13 (#36328)
8b4a548baf is described below

commit 8b4a548baf862c4333fab8868b416fcf30612956
Author: zhjwpku <zhjw...@gmail.com>
AuthorDate: Wed Jun 28 00:05:45 2023 +0800

    GH-35651: [C++] Suppress self-move warning introduced in gcc 13 (#36328)
    
    
    
    ### Rationale for this change
    
    PR #35653 had a fix for MinGW, but I think the real cause is that gcc add a 
new warning -Wself-move.
    
    see https://gcc.gnu.org/gcc-13/changes.html.
    
    We should suppress it if we need to move to itself.
    
    ### What changes are included in this PR?
    
    suppress self-move warning by adding a cpp flag
    
    ### Are these changes tested?
    
    Yes
    
    ### Are there any user-facing changes?
    
    No
    
    * Closes: #35651
    
    Authored-by: Zhao Junwang <zhjw...@gmail.com>
    Signed-off-by: Antoine Pitrou <anto...@python.org>
---
 cpp/cmake_modules/SetupCxxFlags.cmake   | 7 +++++++
 cpp/src/arrow/util/small_vector_test.cc | 2 --
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/cpp/cmake_modules/SetupCxxFlags.cmake 
b/cpp/cmake_modules/SetupCxxFlags.cmake
index 03124e1b38..076c2e7450 100644
--- a/cpp/cmake_modules/SetupCxxFlags.cmake
+++ b/cpp/cmake_modules/SetupCxxFlags.cmake
@@ -404,6 +404,13 @@ elseif(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
     set(CXX_ONLY_FLAGS "${CXX_ONLY_FLAGS} -Wno-noexcept-type")
   endif()
 
+  if(CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL "13.0" OR 
CMAKE_CXX_COMPILER_VERSION
+                                                        VERSION_GREATER "13.0")
+    # -Wself-move added in GCC 13 warns when a value is moved to itself
+    # See https://gcc.gnu.org/gcc-13/changes.html
+    set(CXX_ONLY_FLAGS "${CXX_ONLY_FLAGS} -Wno-self-move")
+  endif()
+
   # Disabling semantic interposition allows faster calling conventions
   # when calling global functions internally, and can also help inlining.
   # See 
https://stackoverflow.com/questions/35745543/new-option-in-gcc-5-3-fno-semantic-interposition
diff --git a/cpp/src/arrow/util/small_vector_test.cc 
b/cpp/src/arrow/util/small_vector_test.cc
index d450e2084a..f9ec5fedfe 100644
--- a/cpp/src/arrow/util/small_vector_test.cc
+++ b/cpp/src/arrow/util/small_vector_test.cc
@@ -413,12 +413,10 @@ class TestSmallStaticVector : public ::testing::Test {
     ASSERT_EQ(moved_moved_ints.size(), 5);
     EXPECT_THAT(moved_moved_ints, ElementsAre(4, 5, 6, 7, 8));
 
-#ifndef __MINGW32__
     // Move into itself
     moved_moved_ints = std::move(moved_moved_ints);
     ASSERT_EQ(moved_moved_ints.size(), 5);
     EXPECT_THAT(moved_moved_ints, ElementsAre(4, 5, 6, 7, 8));
-#endif
   }
 
   void TestMove() {