[BYOC] how to link extern .so files

Development
#1

Hi, I followed the BYOC tutorial and inserted some op functions of my compute library. When my op can run without any extern .so files, I found it works well. But if a op function relays on an extern .so library, TVM reports this error:

python: symbol lookup error: /home/.../dense.so: undefined symbol: extern_func_symbol

I have tried to add compile flags in lib.export_library("./dense.so", options = "-std=c++11 -Lxxxxx") , but TVM reports g++: error: unrecognized command line option ‘-std=c++11 -Lxxxxx’

How can I fix it?

#2

You can take a look at how we integrate DNNL (aka oneDNN). I think you need to link your *.so file to libtvm.so or libtvm_runtime.so. cc @comaniac

#3

The way you use is for static link for the generated code why the error is for dynamic link. As @masahi pointed out, you should link your .so to TVM, which means you may need to add this library to the TVM building process.

#4

try add the following line to CMakeLists.txt:

target_link_libraries(tvm PRIVATE ${PATH_TO_YOUR_SHARED_LIBRARY})
target_link_libraries(tvm_runtime PRIVATE ${PATH_TO_YOUR_SHARED_LIBRARY})

and rebuild TVM.

#5

Thanks for your all, I solved this problem by linking my .so to TVM.

#6

你好，我的CMakeLists.txt文件中已经有关于TVM的target_link_libraries(tvm PRIVATE ${PATH_TO_YOUR_SHARED_LIBRARY}) target_link_libraries(tvm_runtime PRIVATE ${PATH_TO_YOUR_SHARED_LIBRARY})，添加进去自己的.so文件，会产生冲突嘛，如何解决这种冲突。