vcpkg 不适用于谷歌测试

Question

I installed and integrated latest version of vcpkg:

e:\work\vcpkg>vcpkg version
Vcpkg package management program version 0.0.65-692a363701156f1bc319306fbde93fb6748325f6

See LICENSE.txt for license information.

e:\work\vcpkg>vcpkg integrate install
Applied user-wide integration for this vcpkg root.

All C++ projects can now #include any installed libraries.
Linking will be handled automatically.
Installing new libraries will make them instantly available.

I installed google test:

e:\work\vcpkg>vcpkg list
gtest:x64-windows           1.8              GoogleTest and GoogleMock testing frameworks.
gtest:x86-windows           1.8              GoogleTest and GoogleMock testing frameworks.

I included gtest.h in my project in Visual Studio 2015 Update 3:

#include <gtest/gtest.h>

It compiles fine, but I have linker errors:

1>main.obj : error LNK2001: unresolved external symbol "void __cdecl testing::InitGoogleTest(int *,char * *)" (?InitGoogleTest@testing@@YAXPEAHPEAPEAD@Z)
1>main.obj : error LNK2001: unresolved external symbol "public: int __cdecl testing::UnitTest::Run(void)" (?Run@UnitTest@testing@@QEAAHXZ)
1>main.obj : error LNK2001: unresolved external symbol "public: static class testing::UnitTest * __cdecl testing::UnitTest::GetInstance(void)" (?GetInstance@UnitTest@testing@@SAPEAV12@XZ)

Apparently, Visual Studio does not know it should link with gtest.lib . And I cannot understand why. Vcpkg only says that "Linking will be handled automatically." No idea how it is going to do this.

In "Additional Library Dependencies" of my project I can see these inherited values:

$(VcpkgRoot)lib
$(VcpkgRoot)lib\manual-link

And $(VcpkgRoot) is resolved to e:\\work\\vcpkg\\installed\\x64-windows\\ . So it seems like integration was successful. But how Visual Studio knows it should link with gtest.lib ?

Note that if I add gtest.lib to "Additional Dependencies" manually, all works fine, and gtest.dll is automatically copied to output directory.

Answer 1

I think that the autolinking behavior has been intentionally disabled for gtest , see vcpkg issue #306 . Original comment on the issue: here .

The vcpkg implementation requires manual linking because Google Test can redefine main() , and the gtest functionality is duplicated in all of the four separate library files.
Official documentation .

The required per project configuration:
In: Configuration Properties > Linker > Input > Additional Dependencies
For release-builds:

$(VcpkgRoot)lib\manual-link\gtest_main.lib

For debug-builds:

$(VcpkgRoot)debug\lib\manual-link\gtest_main.lib

If you want to create your own custom main(), replace gtest_main.lib with gtest.lib .
If you want to use gmock, you can replace it with gmock_main.lib or gmock.lib .

Answer 2

This is an old thread but I would like to point out what I've found.

You need to link the libs in the manual-link directory, but you need to link them in the right order. First link gmock_main then gtest_main. The other way around just results in 0 test.