Googletest: MSVC 2017 error C2220: warning treated as error - no 'object' file generated

Created on 2 Jan 2018 · 5Comments · Source: google/googletest

git tag: release-1.8.0
configure: cmake 3.10.0
generator: Visual studio 15 2017 Win64

Scenario 1 (gmock)

BUILD_GMOCK:BOOL=ON
BUILD_GTEST:BOOL=ON

Errors:

googletest\include\gtest/internal/gtest-port.h(996): error C2220: warning treated as error - no 'object' file generated [build\googlemock\gmock.vcxproj]
googletest\include\gtest/internal/gtest-port.h(996): error C2220: warning treated as error - no 'object' file generated [build\googlemock\gmock_main.vcxproj]
googletest\include\gtest/internal/gtest-port.h(996): error C2220: warning treated as error - no 'object' file generated [build\googletest\gtest.vcxproj]
googletest\include\gtest/internal/gtest-port.h(996): error C2220: warning treated as error - no 'object' file generated [build\googletest\gtest_main.vcxproj]

Scenario 2 (gtest & gtestmain)

BUILD_GMOCK:BOOL=OFF
BUILD_GTEST:BOOL=ON

Errors:

googletest\include\gtest/internal/gtest-port.h(996): error C2220: warning treated as error - no 'object' file generated [build\googletest\gtest.vcxproj]
googletest\include\gtest/internal/gtest-port.h(996): error C2220: warning treated as error - no 'object' file generated [build\googletest\gtest_main.vcxproj]

Source

agirault

👍9

Most helpful comment

Actually warning itself (not the error posted above) gives a good clue.
Warning:

googletest\include\gtest\gtest-printers.h(639):
warning C4996: 'std::tr1': warning STL4002: The non-Standard std::tr1 namespace and TR1-only machinery are deprecated and will be REMOVED. You can define _SILENCE_TR1_NAMESPACE_DEPRECATION_WARNING to acknowledge that you have received this warning. [build\googlemock\gmock.vcxproj]

So I ran cmake like this and it helped:
cmake ... -DCMAKE_CXX_FLAGS=/D_SILENCE_TR1_NAMESPACE_DEPRECATION_WARNING

Although you can get a different warning, then this won't work obviously.
In general to switch off /WX completely you can call like this: cmake ... "-DCMAKE_CXX_FLAGS=/w"

IvanBoyko on 13 Mar 2018

👍4

All 5 comments

It would probably be good to disable -Werror or /WX for users of this library – compilers can change, new warnings can be generated. It should still be enabled for your own tests, say on CI or so.

heinrich5991 on 5 Jan 2018

This appears to have been fixed in Visual Studio 15.5.5. https://github.com/google/googletest/commit/718fd88d8f145c63b8cc134cf8fed92743cc112f works well for me.

coder0xff on 27 Jan 2018

👍2

Is there any simple way (like cmake argument) to skip this error when building release-1.8.0 tag?

IvanBoyko on 13 Mar 2018

Actually warning itself (not the error posted above) gives a good clue.
Warning:

googletest\include\gtest\gtest-printers.h(639):
warning C4996: 'std::tr1': warning STL4002: The non-Standard std::tr1 namespace and TR1-only machinery are deprecated and will be REMOVED. You can define _SILENCE_TR1_NAMESPACE_DEPRECATION_WARNING to acknowledge that you have received this warning. [build\googlemock\gmock.vcxproj]

So I ran cmake like this and it helped:
cmake ... -DCMAKE_CXX_FLAGS=/D_SILENCE_TR1_NAMESPACE_DEPRECATION_WARNING

Although you can get a different warning, then this won't work obviously.
In general to switch off /WX completely you can call like this: cmake ... "-DCMAKE_CXX_FLAGS=/w"

IvanBoyko on 13 Mar 2018

👍4

I have been cleaning up older and inactive GitHub googletest issues. You may see an issue "closed" if it appears to be inactive/abandoned
Thank you