How to set $(OutDir), $(TargetName), $(TargetExt), and %(Lib.OutputFile) with Visual Studio?

I see it. Right-click the gtest project, Properties, Configuration properties, General. Ensure that the Debug configuration is selected (upper left combo). Change the Target Name property to

 $(ProjectName)d

Note the added "d" to change the name from gtest to gtestd. The warning is otherwise benign.

I think no one has the right answer, i solved this way: in project properties pages, check if linker->General->Output file match configuration properties->General->target name & configuration properties->General->target extension.

You don't need to add any 'd', of course, is more simple set to Inherit from parent or project defaults, for all 3 variables.

Example:

Linker → General → Output File = "myproject.exe"

then:

Configuration Properties → General → Target Name = "myproject"

configuration properties → General → Target Extension = ".exe"

The warning is spurious -- assuming you're using Google Test, it works just fine

You can make it go away however. Right click on the offending project and select properties. Select "Librarian" in the tree view on the left hand side, and change the "Output File" item on the right by clicking on the box next to output file, and selecting "Inherit from parent or project defaults".