set CXX standard for Windows in cmake list, set linker attribute for …

…Pd external (solves issue #53)

README.md

@@ -189,7 +189,7 @@ git clone https://github.com/acids-ircam/nn_tilde --recurse-submodules
 cd nn_tilde
 mkdir build
 cd build
-cmake ..\src -A x64 -DCMAKE_PREFIX_PATH="<unzipped libtorch directory>"
+cmake ..\src -A x64 -DCMAKE_PREFIX_PATH="<unzipped libtorch directory>" -DPUREDATA_INCLUDE_DIR="<path-to-pd/src>" -DPUREDATA_BIN_DIR="<path-to-pd/bin>"
 cmake --build . --config Release
 ```
 

src/frontend/maxmsp/nn_tilde/CMakeLists.txt

@@ -71,6 +71,7 @@ endif()
 endif()
 
 if (MSVC) # COPY TORCH DLL IN THE LOADER FOLDER
+set_property(TARGET ${PROJECT_NAME} PROPERTY CXX_STANDARD 20)
 add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
     COMMAND ${CMAKE_COMMAND} -E copy_directory "${TORCH_INSTALL_PREFIX}/lib/" ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/
 )

src/frontend/puredata/nn_tilde/nn_tilde.cpp

@@ -273,7 +273,11 @@ void startup_message() {
 }
 
 extern "C" {
+#ifdef _WIN32
+void __declspec(dllexport) nn_tilde_setup(void) {
+#else
 void nn_tilde_setup(void) {
+#endif
   startup_message();
   nn_tilde_class = class_new(gensym("nn~"), (t_newmethod)nn_tilde_new, 0,
                              sizeof(t_nn_tilde), CLASS_DEFAULT, A_GIMME, 0);
@@ -288,4 +292,4 @@ void nn_tilde_setup(void) {
                   A_GIMME, A_NULL);
   CLASS_MAINSIGNALIN(nn_tilde_class, t_nn_tilde, f);
 }
-}
+}