MKLDNN changes global linker flags with shared library.
Created by: reyoung
When WITH_MKLDNN is true, configure.cmake changes linker flags to link -liomp for all executors and shared libraries. But some of Paddle executors and libraries (especially executors and shared libraries when refactoring) do not need MKLDNN and do not depend on it.
So we should change the configure.cmake to make targets who use iomp to link it.
How to reproduce this issue.
In Linux system, add cmake flag WITH_MKLDNN=ON, and make any binary or shared library which does not depends on MKLDNN will trigger this error.
Like
cmake .. -DWITH_MKLDNN=ON
make paddle_pybind