Question

我尝试在ubuntu 11.04上编译以下代码：

#include <boost/interprocess/shared_memory_object.hpp> 
#include <iostream> 

int main() 
{ 
  boost::interprocess::shared_memory_object shdmem(boost::interprocess::open_or_create, "Highscore", boost::interprocess::read_write); 
  shdmem.truncate(1024); 
  std::cout << shdmem.get_name() << std::endl; 
  boost::interprocess::offset_t size; 
  if (shdmem.get_size(size)) 
    std::cout << size << std::endl; 
}

只是为了得到以下错误：

/tmp/cc786obC.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&)':
shared_memory.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'
shared_memory.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'
shared_memory.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'
shared_memory.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'
collect2: ld returned 1 exit status

我用来编译文件的命令：g ++ -o shared shared.cpp

我用来安装boost库的命令：sudo apt-get install libboost-dev libboost-doc

Answer 1

通过链接librt使shm_open可用。尝试将-lrt标志传递给链接器。

尝试： g ++ -c -Wall shared.cpp

g ++ -L / lib -lrt shared.o -o shared

Answer 2

同样的问题从@ anio的答案中解决了，但我需要做更多的工作。由于声誉低，我无法发表评论。所以我提出我的便士，可能有人觉得它很有帮助。我是宝贝踩着一切，所以＆＃34;抱歉＆＃34;如果我看起来很幼稚。

我在Debian上使用Eclipse来交叉编译arm-linux-gnueabihf-g ++。所以我首先找到＆＃34; librt＆＃34;

的位置

/$ find -iname "librt*"
./home/myuser/targetsysroot/usr/lib/arm-linux-gnueabihf/librt.a
./home/myuser/targetsysroot/usr/lib/arm-linux-gnueabihf/librt.so
./home/myuser/targetsysroot/usr/lib/arm-linux-gnueabihf/librtmp.so.0
./home/myuser/targetsysroot/lib/arm-linux-gnueabihf/librt-2.13.so
./home/myuser/targetsysroot/lib/arm-linux-gnueabihf/librt.so.1
./lib/arm-linux-gnueabihf/librt.so.1
./lib/arm-linux-gnueabihf/librt-2.19.so
./lib/i386-linux-gnu/librt.so.1
./lib/i386-linux-gnu/i686/cmov/librt.so.1
./lib/i386-linux-gnu/i686/cmov/librt-2.19.so
./lib/i386-linux-gnu/librt-2.19.so

由于我更喜欢与远程目标机器同步，因此我添加了＆＃34; sysroot路径＆＃34;我的库进入eclipse项目属性＆＃34;图书馆搜索路径（-L）＆＃34;

/home/myuser/targetsysroot/usr/lib/arm-linux-gnueabihf

还添加了＆＃34; rt＆＃34;到图书馆（-l），最终解决了我的问题。

如果您正在使用

进行编译

g++ -L $YOUR_PATH_TO_LIB$ shared.o -o shared -lrt

用你的替换$ YOUR_PATH_TO_LIB。

Answer 3

只需添加@ anio的回答：

链接时，可能需要在命令末尾添加-lrt标志。尝试：

g++ -L /lib shared.o -o shared -lrt

Answer 4

g ++ -L / lib shared.o -o shared -lrt -lpthread

C ++ boost库shared_memory_object对'shm_open'的未定义引用

4 个答案: