使用boost::interprocess编译链接器时出错

Question

我已经编写了一个小程序，它将一个boost::interprocess::container字符串写入到一个共享内存中，并从其中读取另一个字符串。

我收到以下链接器错误：

g++ SharedMemTest.cpp -L /usr/lib/x86_64-linux-gnu/librt.a
/tmp/cc5v7WKj.o: In function `boost::interprocess::detail::mutexattr_wrapper::mutexattr_wrapper(bool)':
SharedMemTest.cpp:(.text._ZN5boost12interprocess6detail17mutexattr_wrapperC2Eb[_ZN5boost12interprocess6detail17mutexattr_wrapperC5Eb]+0x1c): undefined reference to `pthread_mutexattr_init'
SharedMemTest.cpp:(.text._ZN5boost12interprocess6detail17mutexattr_wrapperC2Eb[_ZN5boost12interprocess6detail17mutexattr_wrapperC5Eb]+0x31): undefined reference to `pthread_mutexattr_setpshared'
SharedMemTest.cpp:(.text._ZN5boost12interprocess6detail17mutexattr_wrapperC2Eb[_ZN5boost12interprocess6detail17mutexattr_wrapperC5Eb]+0x4c): undefined reference to `pthread_mutexattr_settype'
/tmp/cc5v7WKj.o: In function `boost::interprocess::detail::mutexattr_wrapper::~mutexattr_wrapper()':
SharedMemTest.cpp:(.text._ZN5boost12interprocess6detail17mutexattr_wrapperD2Ev[_ZN5boost12interprocess6detail17mutexattr_wrapperD5Ev]+0x14): undefined reference to `pthread_mutexattr_destroy'
/tmp/cc5v7WKj.o: In function `boost::interprocess::shared_memory_object::priv_open_or_create(boost::interprocess::detail::create_enum_t, char const*, boost::interprocess::mode_t, boost::interprocess::permissions const&)':
SharedMemTest.cpp:(.text._ZN5boost12interprocess20shared_memory_object19priv_open_or_createENS0_6detail13create_enum_tEPKcNS0_6mode_tERKNS0_11permissionsE[boost::interprocess::shared_memory_object::priv_open_or_create(boost::interprocess::detail::create_enum_t, char const*, boost::interprocess::mode_t, boost::interprocess::permissions const&)]+0xe0): undefined reference to `shm_open'
SharedMemTest.cpp:(.text._ZN5boost12interprocess20shared_memory_object19priv_open_or_createENS0_6detail13create_enum_tEPKcNS0_6mode_tERKNS0_11permissionsE[boost::interprocess::shared_memory_object::priv_open_or_create(boost::interprocess::detail::create_enum_t, char const*, boost::interprocess::mode_t, boost::interprocess::permissions const&)]+0x116): undefined reference to `shm_open'
SharedMemTest.cpp:(.text._ZN5boost12interprocess20shared_memory_object19priv_open_or_createENS0_6detail13create_enum_tEPKcNS0_6mode_tERKNS0_11permissionsE[boost::interprocess::shared_memory_object::priv_open_or_create(boost::interprocess::detail::create_enum_t, char const*, boost::interprocess::mode_t, boost::interprocess::permissions const&)]+0x16c): undefined reference to `shm_open'
SharedMemTest.cpp:(.text._ZN5boost12interprocess20shared_memory_object19priv_open_or_createENS0_6detail13create_enum_tEPKcNS0_6mode_tERKNS0_11permissionsE[boost::interprocess::shared_memory_object::priv_open_or_create(boost::interprocess::detail::create_enum_t, char const*, boost::interprocess::mode_t, boost::interprocess::permissions const&)]+0x1c0): undefined reference to `shm_open'
/tmp/cc5v7WKj.o: In function `boost::interprocess::shared_memory_object::remove(char const*)':
SharedMemTest.cpp:(.text._ZN5boost12interprocess20shared_memory_object6removeEPKc[boost::interprocess::shared_memory_object::remove(char const*)]+0x40): undefined reference to `shm_unlink'

我还尝试链接到以下内容：

g++ -c SharedMemTest.cpp
g++ -L /usr/lib/x86_64-linux-gnu/librt.a SharedMemTest.o -o SharedMemTest

但是这些命令都不起作用。谁能告诉我怎样才能编译这个简单的例子？

Answer 1

-L的参数应该是一个目录，但是您在它后面放置了一个库文件名。你可能指的是-l rt。其他人已经建议使用-l pthread，您也可以使用-pthread链接到pthreads库。