Can't include googletest inside cmake script - c++

Question

i try to create some small project on windows, but when i try to build this with cmake there are many errors occured. On linux this build up successfully. When i create dummy project with CMake all work. This is my folder structure:
extern
googletest
tests
...
CMakeLists.txt
...
CMakeLists.txt
Root CMakeLists.txt:
# Setup cmake minimal required version
cmake_minimum_required(VERSION 3.10)
# Declare project
project(mobile_speaker_driver)
# Change c++ standard
set(CMAKE_CXX_STANDARD 17)
# Adding googletest to project
option(PACKAGE_TESTS "Build the tests" ON)
if(PACKAGE_TESTS)
enable_testing()
include(GoogleTest)
add_subdirectory(tests)
endif()
# Add source files to driver library
if (WIN32)
set(SOURCE_FILES apps/main.cpp src/AudioDriver.cpp src/AudioDriverWindows.cpp)
elseif (UNIX)
set(SOURCE_FILES apps/main.cpp src/AudioDriver.cpp src/AudioDriverLinux.cpp)
endif (WIN32)
add_executable(${PROJECT_NAME} ${SOURCE_FILES})
Tests CMakeLists.txt:
set(TESTBINARY ${PROJECT_NAME}_test)
add_subdirectory("${PROJECT_SOURCE_DIR}/extern/googletest" "extern/googletest")
add_executable(${TESTBINARY} main.cpp AudioDriverTest.cpp)
target_link_libraries(${TESTBINARY} gtest gtest_main)
Errors:
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/include/gtest/internal/gtest-port.h: In function 'int testing::internal::posix::StrCaseCmp(const char*, const char*)':
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/include/gtest/internal/gtest-port.h:1985:10: error: '_stricmp' was not declared in this scope; did you mean 'strncmp'?
1985 | return _stricmp(s1, s2);
| ^~~~~~~~
| strncmp
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/include/gtest/internal/gtest-port.h: In function 'char* testing::internal::posix::StrDup(const char*)':
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/include/gtest/internal/gtest-port.h:1987:47: error: '_strdup' was not declared in this scope
1987 | inline char* StrDup(const char* src) { return _strdup(src); }
| ^~~~~~~
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/include/gtest/internal/gtest-port.h: In function 'int testing::internal::posix::FileNo(FILE*)':
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/include/gtest/internal/gtest-port.h:1995:40: error: '_fileno' was not declared in this scope; did you mean 'file'?
1995 | inline int FileNo(FILE* file) { return _fileno(file); }
| ^~~~~~~
| file
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/include/gtest/internal/gtest-port.h: In function 'FILE* testing::internal::posix::FDOpen(int, const char*)':
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/include/gtest/internal/gtest-port.h:2072:56: error: 'fdopen' was not declared in this scope; did you mean 'fopen'?
2072 | inline FILE* FDOpen(int fd, const char* mode) { return fdopen(fd, mode); }
| ^~~~~~
| fopen
In file included from D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest-all.cc:41:
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest.cc: In static member function 'static bool testing::internal::String::CaseInsensitiveWideCStringEquals(const wchar_t*, const wchar_t*)':
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest.cc:2077:10: error: '_wcsicmp' was not declared in this scope; did you mean 'wcsncmp'?
2077 | return _wcsicmp(lhs, rhs) == 0;
| ^~~~~~~~
| wcsncmp
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest.cc: In member function 'int testing::UnitTest::Run()':
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest.cc:5253:21: error: '_OUT_TO_STDERR' was not declared in this scope
5253 | _set_error_mode(_OUT_TO_STDERR);
| ^~~~~~~~~~~~~~
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest.cc:5253:5: error: '_set_error_mode' was not declared in this scope
5253 | _set_error_mode(_OUT_TO_STDERR);
| ^~~~~~~~~~~~~~~
In file included from D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest-all.cc:42:
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest-death-test.cc: In function 'void testing::internal::DeathTestAbort(const string&)':
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest-death-test.cc:296:5: error: '_exit' was not declared in this scope; did you mean '_cexit'?
296 | _exit(1);
| ^~~~~
| _cexit
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest-death-test.cc: In member function 'virtual void testing::internal::DeathTestImpl::Abort(testing::internal::DeathTest::AbortReason)':
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest-death-test.cc:527:3: error: '_exit' was not declared in this scope; did you mean '_cexit'?
527 | _exit(1); // Exits w/o any normal exit hooks (we were supposed to crash)
| ^~~~~
| _cexit
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest-death-test.cc: In member function 'virtual testing::internal::DeathTest::TestRole testing::internal::WindowsDeathTest::AssumeRole()':
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest-death-test.cc:771:24: error: '_MAX_PATH' was not declared in this scope; did you mean 'MAX_PATH'?
771 | char executable_path[_MAX_PATH + 1]; // NOLINT
| ^~~~~~~~~
| MAX_PATH
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest-death-test.cc:773:65: error: 'executable_path' was not declared in this scope
773 | executable_path,
| ^~~~~~~~~~~~~~~
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest-death-test.cc:308:38: note: in definition of macro 'GTEST_DEATH_TEST_CHECK_'
308 | if (!::testing::internal::IsTrue(expression)) { \
| ^~~~~~~~~~
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest-death-test.cc:797:11: error: 'executable_path' was not declared in this scope
797 | executable_path, const_cast<char*>(command_line.c_str()),
| ^~~~~~~~~~~~~~~
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest-death-test.cc:308:38: note: in definition of macro 'GTEST_DEATH_TEST_CHECK_'
308 | if (!::testing::internal::IsTrue(expression)) { \
| ^~~~~~~~~~
In file included from D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest-all.cc:43:
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest-filepath.cc: In static member function 'static testing::internal::FilePath testing::internal::FilePath::GetCurrentDir()':
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest-filepath.cc:49:26: error: '_MAX_PATH' was not declared in this scope; did you mean 'MAX_PATH'?
49 | # define GTEST_PATH_MAX_ _MAX_PATH
| ^~~~~~~~~
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest-filepath.cc:101:12: note: in expansion of macro 'GTEST_PATH_MAX_'
101 | char cwd[GTEST_PATH_MAX_ + 1] = { '\0' };
| ^~~~~~~~~~~~~~~
D:/Projects/mobile-speaker-driver/extern/googletest/googletest/src/gtest-filepath.cc:102:27: error: 'cwd' was not declared in this scope
102 | return FilePath(_getcwd(cwd, sizeof(cwd)) == nullptr ? "" : cwd);
| ^~~
make.exe[2]: *** [tests/extern/googletest/googletest/CMakeFiles/gtest.dir/src/gtest-all.cc.obj] Ошибка 1
make.exe[1]: *** [tests/extern/googletest/googletest/CMakeFiles/gtest.dir/all] Ошибка 2
make.exe: *** [all] Ошибка 2

Answer 1

The problem is occured because i force build googletest with c++17 flags. Just place CMAKE_CXX_STANDARD after googletest include in main CMakeLists.txt.