Failed to compile C++ LibTorch VAD example

[fred-rabelo]

I am not a very experienced programmer, so excuse me for any simple confusion.
(running on Windows 11-64x, forgot to say)

I am trying to compile the C++ Libtorch example but running on few errors:

When i run the standard compilation line from the the readme, corrected for the location of my libtorch:

g++ main.cc silero_torch.cc -I ../../../libtorch/include/ -I ../../../libtorch/include/torch/csrc/api/include -L ../../../libtorch/lib/ -ltorch -ltorch_cpu -lc10 -Wl,-rpath,../../../libtorch/lib/ -o silero -std=c++17 -D_GLIBCXX_USE_CXX11_ABI=0

i get the following error:

At line:1 char:166
 ... lude -L ../../../libtorch/lib/ -ltorch -ltorch_cpu -lc10 -Wl,-rpath,. ...
                                                                 ~
Missing argument in parameter list.

At line:1 char:173
 ...  ../../../libtorch/lib/ -ltorch -ltorch_cpu -lc10 -Wl,-rpath,../../.. ...
                                                                 ~
Missing argument in parameter list.
     CategoryInfo          : ParserError: (:) [], ParentContainsErrorRecordException
     FullyQualifiedErrorId : MissingArgument

I don´t understand what argument is missing there. Any insights?

removing the Option -Wl,-rapth, :

g++ main.cc silero_torch.cc -I ../../../libtorch/include/ -I ../../../libtorch/include/torch/csrc/api/include -L ../../../libtorch/lib/ -ltorch -ltorch_cpu -lc10 -o silero -std=c++14 -D_GLIBCXX_USE_CXX11_ABI=0

it executes but returns basically the following errors:

../../../libtorch/include/torch/csrc/jit/ir/ir.h: At global scope:
../../../libtorch/include/torch/csrc/jit/ir/ir.h:302:42: error: function 'std::shared_ptr<torch::jit::Wrap<torch::jit::Value> > torch::jit::Value::wrap()' definition is marked dllimport
  302 |   TORCH_API std::shared_ptr<Wrap<Value>> wrap() {
      |                                          ^~~~
../../../libtorch/include/torch/csrc/jit/ir/ir.h:1138:42: error: function 'std::shared_ptr<torch::jit::Wrap<torch::jit::Block> > torch::jit::Block::wrap()' definition is marked dllimport
 1138 |   TORCH_API std::shared_ptr<Wrap<Block>> wrap() {
      |                                          ^~~~

and:

../../../libtorch/include/c10/macros/Macros.h:432:5: error: '__assert_fail' was not declared in this scope; did you mean '__fastfail'?
  432 |     __assert_fail(                                                       \
      |     ^~~~~~~~~~~~~

[fred-rabelo]

A workaround i found for the last error "__assert_fail not declared" was adding "-DNDEBUG", supposedly turning off asserts, although i am still researching to better understand what are the implications of it.

[fred-rabelo]

Following the advice on this thread: https://discourse.cmake.org/t/how-to-avoid-error-definition-is-marked-dllimport/2726/13

MODULE_API’s definition was in some codepath that thought it wasn’t going to compile the definition in ModuleInterface.cpp. It is an error to have a declaration with “this comes from another library” (what dllimport means) and then provide a definition for it.

TORCH_API in this case

That solved that problem, but i am still unable to compile due to several "undefined reference to imp"

like this one:

C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/14.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Fred\AppData\Local\Temp\cc3lSCmS.o:silero_torch.c:(.text$_ZN5torch3jit6Object10run_methodIJEEEN3c106IValueERKSsDpOT_[_ZN5torch3jit6Object10run_methodIJEEEN3c106IValueERKSsDpOT_]+0x90): undefined reference to `__imp__ZNK5torch3jit6MethodclESt6vectorIN3c106IValueESaIS4_EERKSt13unordered_mapISsS4_St4hashISsESt8equal_toISsESaISt4pairIKSsS4_EEE'
collect2.exe: error: ld returned 1 exit status

using this command line:

g++ main.cc silero_torch.cc -I ../../../libtorch/include/ -I ../../../libtorch/include/torch/csrc/api/include -L ../../../libtorch/lib/ -ltorch -ltorch_cpu -lc10 -o silero -DNDEBUG -std=c++17 -D_GLIBCXX_USE_CXX11_ABI=0