Disable Warnings from Google Test

Question

I have just installed a fresh Visual Studio 16.10.3 and added Google Test to my command console app. Right of the bat, I get the following warnings:

Severity	Code	Description	Project	File	Line
Warning	C26812	The enum type 'testing::TestPartResult::Type' is unscoped. Prefer 'enum class' over 'enum' (Enum.3).	Tests	D:\C++\ConsoleTest\packages\Microsoft.googletest.v140.windesktop.msvcstl.static.rt-dyn.1.8.1.4\build\native\include\gtest\gtest-test-part.h	62
Warning	C26495	Variable 'testing::internal::Mutex::critical_section_' is uninitialized. Always initialize a member variable (type.6).	Tests	D:\C++\ConsoleTest\packages\Microsoft.googletest.v140.windesktop.msvcstl.static.rt-dyn.1.8.1.4\build\native\include\gtest\internal\gtest-port.h	1804
Warning	C26495	Variable 'testing::internal::Mutex::critical_section_init_phase_' is uninitialized. Always initialize a member variable (type.6).	Tests	D:\C++\ConsoleTest\packages\Microsoft.googletest.v140.windesktop.msvcstl.static.rt-dyn.1.8.1.4\build\native\include\gtest\internal\gtest-port.h	1804
Warning	C26495	Variable 'testing::internal::Mutex::owner_thread_id_' is uninitialized. Always initialize a member variable (type.6).	Tests	D:\C++\ConsoleTest\packages\Microsoft.googletest.v140.windesktop.msvcstl.static.rt-dyn.1.8.1.4\build\native\include\gtest\internal\gtest-port.h	1804
Warning	C26495	Variable 'testing::internal::Mutex::type_' is uninitialized. Always initialize a member variable (type.6).	Tests	D:\C++\ConsoleTest\packages\Microsoft.googletest.v140.windesktop.msvcstl.static.rt-dyn.1.8.1.4\build\native\include\gtest\internal\gtest-port.h	1804
Warning	C26812	The enum type 'testing::internal::Mutex::StaticConstructorSelector' is unscoped. Prefer 'enum class' over 'enum' (Enum.3).	Tests	D:\C++\ConsoleTest\packages\Microsoft.googletest.v140.windesktop.msvcstl.static.rt-dyn.1.8.1.4\build\native\include\gtest\internal\gtest-port.h	1804

I tried suppressing the warnings by surrounding #include "pch.h" as described here:

#pragma warning(push, 0)  
#include "pch.h"
#pragma warning(pop)

However, that didn't work - instead, I only got an additional warning that

#pragma warning(pop): no matching '#pragma warning(push)' (C4193)

I also read the Broken Warnings Theory. Unfortunately, I have to admit that I do not understand it. I think this is the relevant section:

To suppress the warning in external headers, we need to both specify which headers are external and what the warning level in those headers should be:

cl.exe /experimental:external /external:I some_lib_dir /external:W0 /W4 my_prog.cpp

This would effectively get rid of any warning inside some_hdr.hpp while preserving warnings inside my_prog.cpp.

But where would I add these switches and what would be the correct path variable for googletest?

Thank you in advance for your help!

You have to specify the warning number which you want to suppress here: `#pragma warning(push, 26812) ` And do this directly in the pch file — RoQuOTriX, Jun 30 '21 at 11:01
Maybe, as another option, you could compile your test files separately (without warnings) and link together everything? — Yksisarvinen, Jun 30 '21 at 11:05
with gcc you can include them as system headers via `-isystem` to silence warnings, though not sure whats the VS equiavlent — 463035818_is_not_an_ai, Jun 30 '21 at 11:18
@RoQuOTriX: Sadly, that did not work and, despite what I said earlier, moving it to "pch.h" also did not have any effect. — Markstar, Jul 02 '21 at 07:10

score 1 · Answer 1 · answered Feb 24 '22 at 14:00

Instead of

suppressing the warnings by surrounding #include "pch.h"

you should use the warning pragma to surround both header files(gtest-port.h and gtest-test-part.h), which can be found in External Dependencies in Solution Explorer of the Visual Studio project. The detailed methods are as below.

Add the following code to the very beginning and end of gtest-port.h

#pragma warning( push )
#pragma warning( disable : 26495 )
#pragma warning( disable : 26812 )

// Original Code

#pragma warning( pop )

Similarly, add the following code to the very beginning and end of gtest-test-part.h

#pragma warning( push )
#pragma warning( disable : 26812 )

// Original Code

#pragma warning( pop )

Disable Warnings from Google Test

1 Answers1