cmake does not consider语言 - pthread

cmake does not consider -pthread

本文关键字：pthread 语言 consider does not cmake      更新时间：2023-10-16

我正在尝试使用gmock/gtest对我的程序进行测试;Ubuntu Linux/;KDevelop/CMake。从链接错误消息中我得出结论，部分gtest包缺少pthread支持。

/home/projects/cpp/gmock/gtest/libgtest.a(gtest-all.cc.o): In function `testing::internal::ThreadLocal<testing::TestPartResultReporterInterface*>::~ThreadLocal()':
gtest-all.cc:(.text._ZN7testing8internal11ThreadLocalIPNS_31TestPartResultReporterInterfaceEED2Ev[_ZN7testing8internal11ThreadLocalIPNS_31TestPartResultReporterInterfaceEED5Ev]+0x16): undefined reference to `pthread_getspecific'
gtest-all.cc:(.text._ZN7testing8internal11ThreadLocalIPNS_31TestPartResultReporterInterfaceEED2Ev[_ZN7testing8internal11ThreadLocalIPNS_31TestPartResultReporterInterfaceEED5Ev]+0x2b): undefined reference to `pthread_key_delete'

我也读

googletest:如何设置?

直接使用g++，一切都可以工作。所以，因为我使用KDevelop/CMake，我怀疑我的代码或CMake。

在我的CMakeLists.txt中我使用

add_definitions( -pthread  -m64)

但是，我在Makefile中没有看到任何效果。我错过了一些从我的CMakeLists.txt，或CMake不考虑上面的行吗?

我CMakeLists.txt 

cmake_minimum_required(VERSION 2.8)
add_definitions( -Dpthread )
project(ThreadTest)
INCLUDE_DIRECTORIES(gmock/gtest/include)
set ( GTEST_LIBS libgtest.a )
link_directories( ~/projects/cpp/gmock/gtest)
add_executable(ThreadTest main_test.cpp)
target_link_libraries(ThreadTest  ${GTEST_LIBS})

我是否误解了add_definitions应该在这种情况下工作?

后阅读如何强制cmake包含"-pthread"选项?我的问题看起来很像重复。然而,

cmake_minimum_required(VERSION 2.8)
add_definitions( -Dpthread )
project(ThreadTest)
INCLUDE_DIRECTORIES(gmock/gtest/include)
find_package( Threads )
set ( GTEST_LIBS libgtest.a )
link_directories( ~/projects/cpp/gmock/gtest)
add_executable(ThreadTest main_test.cpp)
target_link_libraries(ThreadTest  ${GTEST_LIBS}  ${CMAKE_THREAD_LIBS_INIT})

仍然给出警告'Could NOT find Threads'。我试着在Ubuntu软件中心搜索"线程"，没有结果。之后，我安装了libghc-threads-dev。但是，当使用

时
set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
find_package(Threads REQUIRED)

我一直收到'无法找到线程'，作为错误。当简单的Makefile产生我所期望的结果时，我应该做些什么来满足find_package ?为什么我有这个问题?

PS: my main file:

#include "gmock/gtest/include/gtest/gtest.h"
TEST(blahTest, blah1) {
    EXPECT_EQ(1, 1);
}
int main (int argc, char** argv) {
    ::testing::InitGoogleTest(&argc, argv);
    int returnValue;
    returnValue =  RUN_ALL_TESTS();
     return returnValue;
}

经过几个小时的忙碌，我成功地编译了我的超级复杂的测试程序，使用KDevelop/CMake/gtest

#include "gtest-1.7.0/include/gtest/gtest.h"
TEST(blahTest, blah1) {
    EXPECT_EQ(1, 1);
}
int main (int argc, char** argv) {
    ::testing::InitGoogleTest(&argc, argv);
    return  RUN_ALL_TESTS();
}

可以执行该任务的CMakeLists.txt文件是

# http://stackoverflow.com/questions/13513905/how-to-properly-setup-googletest-on-linux/13513907#13513907
# http://stackoverflow.com/questions/15193785/how-to-get-cmake-to-recognize-pthread-on-ubuntu
# http://stackoverflow.com/questions/21116622/undefined-reference-to-pthread-key-create-linker-error
# http://stackoverflow.com/questions/1620918/cmake-and-libpthread
# https://meekrosoft.wordpress.com/2009/10/04/testing-c-code-with-the-googletest-framework/
# http://stackoverflow.com/questions/30106608/googletest-cmake-and-make-tests-not-running
# http://stackoverflow.com/questions/13521618/c-project-organisation-with-gtest-cmake-and-doxygen
# http://www.kaizou.org/2014/11/gtest-cmake/
cmake_minimum_required(VERSION 2.8)
project(ThreadTest C CXX)
ADD_SUBDIRECTORY (gtest-1.7.0)
enable_testing()
#set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)
find_package(GTest REQUIRED)
include_directories(${gtest_SOURCE_DIR}/include ${gtest_SOURCE_DIR})
if(NOT MSVC)
  set(PThreadLib -pthread)
endif()
add_executable(ThreadTest main_test.cpp) 
target_link_libraries(ThreadTest ${PThreadLib} ${GTEST_LIBRARIES})
#add_test(ThreadTest ThreadTest)

我想强调一些事情:一些有价值的链接和

project(ThreadTest C CXX) rather than project(ThreadTest)

和

set(PThreadLib -pthread) rather than set(PThreadLib pthread)
我想其余的可以处理。

我在我自己的项目中集成了谷歌测试框架，这个CMake文件正在工作。

# Google C++ Testing Framework
# https://code.google.com/p/googletest/
find_package(GTest REQUIRED)
include_directories(${GTEST_INCLUDE_DIRS})
if(WIN32)
    # GTest is static compiled by default
    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /MT")
    set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /MTd")
endif()
enable_testing()
add_executable(ThreadTest main_test.cpp)
target_link_libraries(ThreadTest ${GTEST_BOTH_LIBRARIES})

CMake警告"Could NOT find Threads"与一个bug有关:

你所需要做的就是链接到pthread:

target_link_libraries(BUILD_ARTIFACT pthread)

BUILD_ARTIFACT可以是您的项目名，或者库名。您应该在定义工件之后添加这一行。

例如，如果构建工件是ThreadTest:

add_executable(ThreadTest main_test.cpp)
target_link_libraries(ThreadTest pthread)
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