Thanks for the reply. I am sending the code and other details please view. O/S :: linux fedora filename : main.cpp #include <boost/interprocess/allocators/allocator.hpp> #include <boost/interprocess/detail/config_begin.hpp> #include <boost/interprocess/detail/workaround.hpp> #include <boost/interprocess/managed_shared_memory.hpp> int main() { boost::interprocess::fixed_managed_shared_memory segment ( boost::interprocess::open_or_create, "MySharedMemory", //segment name 1024 * 1024 ); return 0; } command # g++ -c main.cpp command # g++ g++ -o exec main.o -Wall -pedantic -g -pthread -DBOOST_DATE_TIME_NO_LIB -lstdc++ -lboost_thread /*linking without comman c++ */ command # ./exec command # cp /dev/shm/MySharedMemory shm_without_ccpp /* copy of shared memoty created */ command # rm /dev/shm/MySharedMemory /* remove created shared memoty using comman line */ command # g++ -o exec main.o -Wall -pedantic -g -pthread -DBOOST_DATE_TIME_NO_LIB -lstdc++ -lboost_thread -lxml2 -lccext2 -lccgnu2 -ldl /* linking with comman c ++ */ command # ./exec command # cp /dev/shm/MySharedMemory shm_with_ccpp /* copy of shared memory created */ command # diff shm_without_ccpp shm_with_ccpp Binary files shm_without_ccpp and shm_with_ccpp differ Here I am comparing the two shared memories created. It says these are different. I am not getting just adding a library in link time, how shared memory is changed. Can I get some clue now? On 3/9/07, Peter Dimov <pdimov@mmltd.net> wrote:
Shibu Bera wrote:
yes u r right. Linking another library is not important to use interprocess. But because there is requirment of the other part of the application I am including the link library of comman c++ while creating executable , If I woudn't link comman c++, still shared memory would have beed created.
But including comman c++ link library, the shared memory is created is different from the shared memory which is created without comman c++ link library. And in the shared memory I am finding offset of some bytes on the actual value stored in the shared memory.
Please post the two complete command lines.
You may first try to add -lrt to the program that doesn't use the "common C++ library".
Also, remove the -DBOOST_INTERPROCESS_POSIX_PROCESS_SHARED as Ion stated.
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