Starting with googletest 1.8.1, I meet the following error when building
the tests.
/usr/bin/ld: ../../../gmock/libgmock_main.a(gmock_main.cc.o): in function `main':
/usr/src/googletest/googlemock/src/gmock_main.cc:52: undefined reference to `testing::InitGoogleMock(int*, char**)'