[clang] [llvm] Add macro to suppress -Wunnecessary-virtual-specifier (PR #139614)

LLVM Continuous Integration via cfe-commits cfe-commits at lists.llvm.org
Wed May 21 12:03:24 PDT 2025 

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-ppc64le-linux-multistage` running on `ppc64le-clang-multistage-test` while building `clang,llvm` at step 4 "build stage 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/76/builds/9771

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 4 (build stage 1) failure: 'ninja' (failure)
...
[13/6406] Copying mustache-index.js to /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/stage1/./bin/../share/clang-doc
[14/6406] Copying namespace-template.mustache to /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/stage1/./bin/../share/clang-doc
[15/6406] Copying template.mustache to /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/stage1/./bin/../share/clang-doc
[16/6406] Generating ../../../../bin/scan-build
[17/6406] Generating ../../../../libexec/c++-analyzer
[18/6406] Generating ../../../../libexec/ccc-analyzer
[19/6406] Generating ../../../../share/man/man1/scan-build.1
[20/6406] Generating ../../../../share/scan-build/scanview.css
[21/6406] Generating ../../../../share/scan-build/sorttable.js
[22/6406] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/COM.cpp.o
FAILED: lib/Support/CMakeFiles/LLVMSupport.dir/COM.cpp.o 
ccache /usr/lib64/ccache/c++ -DGTEST_HAS_RTTI=0 -DLLVM_EXPORTS -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/stage1/lib/Support -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/Support -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/stage1/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17 -fPIC -UNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -MD -MT lib/Support/CMakeFiles/LLVMSupport.dir/COM.cpp.o -MF lib/Support/CMakeFiles/LLVMSupport.dir/COM.cpp.o.d -o lib/Support/CMakeFiles/LLVMSupport.dir/COM.cpp.o -c /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/Support/COM.cpp
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include/llvm/Support/COM.h:17,
                 from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/Support/COM.cpp:13:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include/llvm/Support/Compiler.h:719:40: error: missing binary operator before token "("
 #if defined(__clang__) && __has_warning("-Wunnecessary-virtual-specifier")
                                        ^
[23/6406] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ExtensibleRTTI.cpp.o
FAILED: lib/Support/CMakeFiles/LLVMSupport.dir/ExtensibleRTTI.cpp.o 
ccache /usr/lib64/ccache/c++ -DGTEST_HAS_RTTI=0 -DLLVM_EXPORTS -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/stage1/lib/Support -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/Support -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/stage1/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17 -fPIC -UNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -MD -MT lib/Support/CMakeFiles/LLVMSupport.dir/ExtensibleRTTI.cpp.o -MF lib/Support/CMakeFiles/LLVMSupport.dir/ExtensibleRTTI.cpp.o.d -o lib/Support/CMakeFiles/LLVMSupport.dir/ExtensibleRTTI.cpp.o -c /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/Support/ExtensibleRTTI.cpp
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include/llvm/Support/ExtensibleRTTI.h:63,
                 from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/Support/ExtensibleRTTI.cpp:9:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include/llvm/Support/Compiler.h:719:40: error: missing binary operator before token "("
 #if defined(__clang__) && __has_warning("-Wunnecessary-virtual-specifier")
                                        ^
[24/6406] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Watchdog.cpp.o
FAILED: lib/Support/CMakeFiles/LLVMSupport.dir/Watchdog.cpp.o 
ccache /usr/lib64/ccache/c++ -DGTEST_HAS_RTTI=0 -DLLVM_EXPORTS -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/stage1/lib/Support -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/Support -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/stage1/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17 -fPIC -UNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -MD -MT lib/Support/CMakeFiles/LLVMSupport.dir/Watchdog.cpp.o -MF lib/Support/CMakeFiles/LLVMSupport.dir/Watchdog.cpp.o.d -o lib/Support/CMakeFiles/LLVMSupport.dir/Watchdog.cpp.o -c /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/Support/Watchdog.cpp
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include/llvm/Support/Watchdog.h:16,
                 from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/Support/Watchdog.cpp:13:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include/llvm/Support/Compiler.h:719:40: error: missing binary operator before token "("
 #if defined(__clang__) && __has_warning("-Wunnecessary-virtual-specifier")
                                        ^
[25/6406] Building C object lib/Support/BLAKE3/CMakeFiles/LLVMSupportBlake3.dir/blake3.c.o
FAILED: lib/Support/BLAKE3/CMakeFiles/LLVMSupportBlake3.dir/blake3.c.o 
ccache /usr/lib64/ccache/cc -DBLAKE3_NO_AVX2 -DBLAKE3_NO_AVX512 -DBLAKE3_NO_SSE2 -DBLAKE3_NO_SSE41 -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/stage1/lib/Support/BLAKE3 -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/Support/BLAKE3 -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/stage1/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include -fPIC -fno-semantic-interposition -Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-comment -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -UNDEBUG -MD -MT lib/Support/BLAKE3/CMakeFiles/LLVMSupportBlake3.dir/blake3.c.o -MF lib/Support/BLAKE3/CMakeFiles/LLVMSupportBlake3.dir/blake3.c.o.d -o lib/Support/BLAKE3/CMakeFiles/LLVMSupportBlake3.dir/blake3.c.o -c /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/Support/BLAKE3/blake3.c
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/Support/BLAKE3/blake3_impl.h:12,
                 from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/Support/BLAKE3/blake3.c:13:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include/llvm/Support/Compiler.h:719:40: error: missing binary operator before token "("
 #if defined(__clang__) && __has_warning("-Wunnecessary-virtual-specifier")
                                        ^
[26/6406] Building C object lib/Support/BLAKE3/CMakeFiles/LLVMSupportBlake3.dir/blake3_dispatch.c.o
FAILED: lib/Support/BLAKE3/CMakeFiles/LLVMSupportBlake3.dir/blake3_dispatch.c.o 
ccache /usr/lib64/ccache/cc -DBLAKE3_NO_AVX2 -DBLAKE3_NO_AVX512 -DBLAKE3_NO_SSE2 -DBLAKE3_NO_SSE41 -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/stage1/lib/Support/BLAKE3 -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/Support/BLAKE3 -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/stage1/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include -fPIC -fno-semantic-interposition -Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-comment -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -UNDEBUG -MD -MT lib/Support/BLAKE3/CMakeFiles/LLVMSupportBlake3.dir/blake3_dispatch.c.o -MF lib/Support/BLAKE3/CMakeFiles/LLVMSupportBlake3.dir/blake3_dispatch.c.o.d -o lib/Support/BLAKE3/CMakeFiles/LLVMSupportBlake3.dir/blake3_dispatch.c.o -c /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/Support/BLAKE3/blake3_dispatch.c
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/Support/BLAKE3/blake3_impl.h:12,
                 from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/Support/BLAKE3/blake3_dispatch.c:5:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include/llvm/Support/Compiler.h:719:40: error: missing binary operator before token "("
 #if defined(__clang__) && __has_warning("-Wunnecessary-virtual-specifier")
                                        ^

```

</details>

https://github.com/llvm/llvm-project/pull/139614

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