cmake won'；t构建一个Linux c++；11带pthreads的交叉编译程序

简而言之，我可以使用直接的g++命令行构建程序。它构建并在目标上成功执行

然而，如果我使用我能想到的最简单的cmake脚本，构建成功，但程序无法在目标上执行。可执行文件的失败输出为：

terminate called after throwing an instance of 'std::system_error'
what():  Enable multithreading to use std::thread: Operation not permitted
Aborted

我用于成功构建和执行的g++命令行是：

/opt/criticallink/mityomapl138_20151114/sysroots/i686-clsdk-linux/usr/bin/arm-criticallink-linux-gnueabi/arm-criticallink-linux-gnueabi-g++ -o ThreadTest -std=c++11 -pthread main.cpp ThreadTest.cpp

当我在目标上运行straight g++程序时，我得到：

Atomic Success Count: 1000 of 1000.

Mutex Success Count: 1000 of 1000.

Unclean Success Count: 922 of 1000.
Unclean Failure Count: 78 of 1000.

我使用的CMakeLists.txt文件是：

# cmake file for building the ThreadTest executable.  This requires c++11.
CMAKE_MINIMUM_REQUIRED(VERSION 2.8.12)

# !!! Set up the compiler to use, first (i.e. before the PROJECT() call.)
# gcc location.
SET(CROSS_COMPILE_FULL
   "/opt/criticallink/mityomapl138_20151114/sysroots/i686-clsdk-linux/usr/bin/arm-criticallink-linux-gnueabi/arm-criticallink-linux-gnueabi-")
# sysroot location
SET(CROSS_COMPILE_FULL_HOST
   "/opt/criticallink/mityomapl138_20151114/sysroots/arm926ejste-criticallink-linux-gnueabi")
SET(CMAKE_C_COMPILER "${CROSS_COMPILE_FULL}gcc")
SET(CMAKE_CXX_COMPILER "${CROSS_COMPILE_FULL}g++")
SET(CMAKE_FIND_ROOT_PATH "${CROSS_COMPILE_FULL_HOST}")
SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

# The project will use the compiler specified above (or the default compiler for Windows.)
PROJECT(CommonSDK)

SET(MY_TEST_HOME "$ENV{TEST_HOME}")
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -pthread")

SET(CUR_PROJECT_NAME ThreadTest)
SET(PROJECT_HOME_DIR "${MY_TEST_HOME}/${CUR_PROJECT_NAME}")
SET(CMAKE_RUNTIME_OUTPUT_DIRECTORY "$ENV{TEST_EXEC_HOME}")

FILE(GLOB CUR_PROJECT_FILES "${PROJECT_HOME_DIR}/*.cpp" "${PROJECT_HOME_DIR}/*.h")

FIND_PACKAGE(Threads REQUIRED)
ADD_EXECUTABLE(${CUR_PROJECT_NAME} ${CUR_PROJECT_FILES})
TARGET_LINK_LIBRARIES(${CUR_PROJECT_NAME} ${CMAKE_THREAD_LIBS_INIT})

我使用以下命令调用cmake：

mkdir build
cd build
cmake ..

cmake输出为：

-- The C compiler identification is GNU 4.8.3
-- The CXX compiler identification is GNU 4.8.3
-- Check for working C compiler: /opt/criticallink/mityomapl138_20151114/sysroots/i686-clsdk-linux/usr/bin/arm-criticallink-linux-gnueabi/arm-criticallink-linux-gnueabi-gcc
-- Check for working C compiler: /opt/criticallink/mityomapl138_20151114/sysroots/i686-clsdk-linux/usr/bin/arm-criticallink-linux-gnueabi/arm-criticallink-linux-gnueabi-gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /opt/criticallink/mityomapl138_20151114/sysroots/i686-clsdk-linux/usr/bin/arm-criticallink-linux-gnueabi/arm-criticallink-linux-gnueabi-g++
-- Check for working CXX compiler: /opt/criticallink/mityomapl138_20151114/sysroots/i686-clsdk-linux/usr/bin/arm-criticallink-linux-gnueabi/arm-criticallink-linux-gnueabi-g++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Looking for include file pthread.h
-- Looking for include file pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - not found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE  
-- Configuring done
-- Generating done
-- Build files have been written to: /home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build

以下是make的详细输出：

make VERBOSE=1

/usr/bin/cmake -H/home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest -B/home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build --check-build-system CMakeFiles/Makefile.cmake 0
/usr/bin/cmake -E cmake_progress_start /home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build/CMakeFiles /home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build/CMakeFiles/progress.marks
make -f CMakeFiles/Makefile2 all
make[1]: Entering directory `/home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build'
make -f CMakeFiles/ThreadTest.dir/build.make CMakeFiles/ThreadTest.dir/depend
make[2]: Entering directory `/home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build'
cd /home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest /home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest /home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build /home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build /home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build/CMakeFiles/ThreadTest.dir/DependInfo.cmake --color=
Dependee "/home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build/CMakeFiles/ThreadTest.dir/DependInfo.cmake" is newer than depender "/home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build/CMakeFiles/ThreadTest.dir/depend.internal".
Dependee "/home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build/CMakeFiles/CMakeDirectoryInformation.cmake" is newer than depender "/home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build/CMakeFiles/ThreadTest.dir/depend.internal".
Scanning dependencies of target ThreadTest
make[2]: Leaving directory `/home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build'
make -f CMakeFiles/ThreadTest.dir/build.make CMakeFiles/ThreadTest.dir/build
make[2]: Entering directory `/home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build'
/usr/bin/cmake -E cmake_progress_report /home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build/CMakeFiles 1
[ 50%] Building CXX object CMakeFiles/ThreadTest.dir/main.cpp.o
/opt/criticallink/mityomapl138_20151114/sysroots/i686-clsdk-linux/usr/bin/arm-criticallink-linux-gnueabi/arm-criticallink-linux-gnueabi-g++    -O2 -pipe -g -feliminate-unused-debug-types  -std=c++11 -pthread   -o CMakeFiles/ThreadTest.dir/main.cpp.o -c /home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/main.cpp
/usr/bin/cmake -E cmake_progress_report /home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build/CMakeFiles 2
[100%] Building CXX object CMakeFiles/ThreadTest.dir/ThreadTest.cpp.o
/opt/criticallink/mityomapl138_20151114/sysroots/i686-clsdk-linux/usr/bin/arm-criticallink-linux-gnueabi/arm-criticallink-linux-gnueabi-g++    -O2 -pipe -g -feliminate-unused-debug-types  -std=c++11 -pthread   -o CMakeFiles/ThreadTest.dir/ThreadTest.cpp.o -c /home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/ThreadTest.cpp
Linking CXX executable /home/mitydsp/Code/CommonSDK/OutputTest/DbricHost/ThreadTest
/usr/bin/cmake -E cmake_link_script CMakeFiles/ThreadTest.dir/link.txt --verbose=1
/opt/criticallink/mityomapl138_20151114/sysroots/i686-clsdk-linux/usr/bin/arm-criticallink-linux-gnueabi/arm-criticallink-linux-gnueabi-g++    -O2 -pipe -g -feliminate-unused-debug-types  -std=c++11 -pthread   -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed CMakeFiles/ThreadTest.dir/main.cpp.o CMakeFiles/ThreadTest.dir/ThreadTest.cpp.o  -o /home/mitydsp/Code/CommonSDK/OutputTest/DbricHost/ThreadTest -rdynamic -lpthread 
make[2]: Leaving directory `/home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build'
/usr/bin/cmake -E cmake_progress_report /home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build/CMakeFiles  1 2
[100%] Built target ThreadTest
make[1]: Leaving directory `/home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build'
/usr/bin/cmake -E cmake_progress_start /home/mitydsp/Code/CommonSDK/source/Tests/ThreadTest/build/CMakeFiles 0

我在StackOverflow、Google等网站上做了详尽的研究——我遇到的建议都包含在上面的CMakeLists.txt中。但我仍然无法使cmake可执行文件在目标上正常运行

---

任何帮助都将不胜感激

我可以通过添加

-Wl，--no-as-needed

链接器选项来解决这个问题。在CMakeLists.txt文件中，它是这样完成的：

SET(CMAKE_EXE_LINKER_FLAGS "-Wl,--no-as-needed ${THREADTEST_COMPILE_FLAG}")

显然，gcc链接器的默认值是

——根据需要
——其中链接器选择不链接它认为不需要的库。有趣的是，直接的g++命令行构建正确地决定了需要libpthread。在cmake的例子中，g++显然决定不需要libpthread。您将在上面的
make
输出中看到，cmake将大量g++命令行选项与重复项和其他混乱项组合在一起。我怀疑这可能是根本问题

然而，这里有一个可以工作的CMakeLists.txt文件。请注意，至少在我的例子中，根本不需要调用
FIND\u包（需要线程）

# cmake file for building the ThreadTest executable.  This requires c++11.
CMAKE_MINIMUM_REQUIRED(VERSION 2.8.12)

# !!! Set up the compiler to use, first (i.e. before the PROJECT() call.)
# gcc location.
SET(CROSS_COMPILE_FULL
   "/opt/criticallink/mityomapl138_20151114/sysroots/i686-clsdk-linux/usr/bin/arm-criticallink-linux-gnueabi/arm-criticallink-linux-gnueabi-")
# sysroot location
SET(CROSS_COMPILE_FULL_HOST
   "/opt/criticallink/mityomapl138_20151114/sysroots/arm926ejste-criticallink-linux-gnueabi")
SET(CMAKE_C_COMPILER "${CROSS_COMPILE_FULL}gcc")
SET(CMAKE_CXX_COMPILER "${CROSS_COMPILE_FULL}g++")
SET(CMAKE_FIND_ROOT_PATH "${CROSS_COMPILE_FULL_HOST}")
SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

# The project will use the compiler specified above (or the default compiler for Windows.)
PROJECT(CommonSDK)

SET(MY_TEST_HOME "$ENV{TEST_HOME}")
SET(THREADTEST_COMPILE_FLAG "-std=c++11 -pthread")
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${THREADTEST_COMPILE_FLAG}")
SET(CMAKE_EXE_LINKER_FLAGS "-Wl,--no-as-needed ${THREADTEST_COMPILE_FLAG}")

SET(CUR_PROJECT_NAME ThreadTest)
SET(PROJECT_HOME_DIR "${MY_TEST_HOME}/${CUR_PROJECT_NAME}")
SET(CMAKE_RUNTIME_OUTPUT_DIRECTORY "$ENV{TEST_EXEC_HOME}")

FILE(GLOB CUR_PROJECT_FILES "${PROJECT_HOME_DIR}/*.cpp" "${PROJECT_HOME_DIR}/*.h")

ADD_EXECUTABLE(${CUR_PROJECT_NAME} ${CUR_PROJECT_FILES})
TARGET_LINK_LIBRARIES(${CUR_PROJECT_NAME} ${CMAKE_THREAD_LIBS_INIT})

我不知道答案，但您可能希望在运行
make VERBOSE=1
时包含输出。也许你正在链接一个不同的线程库。我想知道它是否也在链接一个不同的线程库。特别是因为在cmake期间，
pthread\u create-not found
实例。我在
find_PACKAGE（Threads）
调用中找不到任何表明它在哪里找到pthreads库的cmake变量。我的生成系统有本机x86_64编译器和两个arm交叉编译器——每个编译器都有自己的sysroot。@f1fan44，这意味着在未使用libpthread时找不到
pthread_create
。第三个测试显示它是使用正确的库找到的，因此cmake将使用该库。或者应该这样做。
ldd ThreadTest
显示了什么？它是否链接到libpthread.so？当程序成功时，ldd显示：
libpthread.so.0=>lib/libpthread.so.0（0x428d0000）
当它失败时，ldd根本不显示libpthread。