CODEWITHSUNDEEP
visual-studiocmake
Matt
Matt

Reputation: 2060

Visual Studio seemingly ignoring runtime library set in cmake

There are many posts about how to set the Runtime library in Visual Studio from CMake, but in my case it seems that Visual Studio is ignoring my setting.

I would like to build google-mock with /MD. This is the default setting in the project.

In a fresh build directory, built with:

cmake -G "Visual Studio 12 2013" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=C:\Users\mrussell\workspace\opal2\o2win32\Libs\gtest\"1.7.0" -DCMAKE_CXX_FLAGS_RELEASE="/MD /O2 /Ob2 /D NDEBUG" ../googlemock

All my cmake variables seem correct

cmake-gui showing all flags have /MD

However, when I go to build, either via the command line (I'm used to linux..) or from Visual Studio, it uses the /MT flag.

My build command (targeting 32 bit):

call "C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\bin\vcvars32.bat"
msbuild /m:4 /property:Configuration=%build_type% ALL_BUILD.vcxproj

Output:

   ClCompile:
     C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\bin\CL.exe /c /IC:\Users\mrussell\workspace\opal2\o2win32\Libs\gtest\g
     test\include /IC:\Users\mrussell\workspace\opal2\o2win32\Libs\gtest\gtest /Zi /nologo /W4 /WX /O2 /Ob2 /Oy- /D WIN32 /D _WIND
     OWS /D NDEBUG /D WIN32 /D _WINDOWS /D _UNICODE /D UNICODE /D WIN32 /D _WIN32 /D STRICT /D WIN32_LEAN_AND_MEAN /D GTEST_HAS_PT
     HREAD=0 /D _HAS_EXCEPTIONS=1 /D "CMAKE_INTDIR=\"Release\"" /D _UNICODE /D UNICODE /Gm- /EHsc /MT /GS /fp:precise /Zc:wchar_t
     /Zc:forScope /GR /Fo"gtest.dir\Release\\" /Fd"gtest.dir\Release\vc120.pdb" /Gd /TP /wd4127 /wd4251 /wd4275 /analyze- /errorRe
     port:queue  -J "C:\Users\mrussell\workspace\opal2\o2win32\Libs\gtest\gtest\src\gtest-all.cc"

(note the /MT hiding in there.)

In Visual Studio, I open the solution, choose release type Release, and in any of the targets, say gtest, Properties -> Configuration Properties -> C/C++ -> Code Generation, the Runtime Library is set to /MT, not /MD as set in the Cmake file.

Same thing happens if I try to build google-test (1.7.0)

Do I just not understand how to set these? Or is there a way to force Visual Studio to use the right flag without manually opening Visual Studio and setting it?

Upvotes: 0

Views: 1321

Answers (1)

sakra
sakra

Reputation: 65751

The CMake build systems of both google-test and google-mock aren't well behaved. They do not obey the compile options and runtime option set up by the user for good reason and override those with options that they consider reasonable for testing purposes.

To prevent the replacement of MD with MT you can set the option gtest_force_shared_crt to ON in the CMake cache. The modification of other compile options (e.g., warnings) however is done unconditionally.

Upvotes: 2

Related Questions