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how-to-integrate.md

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There are usually 4 ways to integrate ppl.nn into your applications.

1. Using Cmake find_package (recommended)

After building and installing ppl.nn, there is a directory(specified by CMAKE_INSTALL_PREFIX) containing header files, libraries and cmake configurations. The entry point for finding ppl.nn is ${CMAKE_INSTALL_PREFIX}/lib/cmake/ppl/pplnn-config.cmake. Here is a sample snippet of CMakeLists.txt:

set(pplnn_DIR "<pplnn_install_dir>/lib/cmake/ppl")
find_package(pplnn REQUIRED)

target_include_directories(<target> PUBLIC ${PPLNN_INCLUDE_DIRS})
target_link_libraries(<target> PUBLIC ${PPLNN_LIBRARIES})

Refer to ${CMAKE_INSTALL_PREFIX}/lib/cmake/ppl/pplnn-config.cmake for other cmake variables like versions and supported devices. In this form you can only use public APIs defined in ${CMAKE_INSTALL_PREFIX}/include/ppl.

A simple example integration shows how to use pplnn-config.cmake to integrate x86 engine into an application.

integration-cuda is a CUDA example.

2. Using ppl.nn as a Source Dependency

You can also import ppl.nn's source like this:

add_subdirectory(pplnn_source_dir)

if(PPLNN_ENABLE_ONNX_MODEL)
    target_link_libraries(<target> PUBLIC pplnn_onnx_static)
endif()
target_include_directories(<target> PUBLIC <pplnn_source_dir>/include <pplnn_source_dir>/src)

Both public and internal APIs are avaliable in this form. NOTE internal APIs are changed frequently and not guaranteed to keep compatibility.

3. Embedding Your Source Code into ppl.nn

ppl.nn provides the following variables:

  • PPLNN_SOURCE_EXTERNAL_SOURCES: source files built and packed into ppl.nn
  • PPLNN_SOURCE_EXTERNAL_INCLUDE_DIRECTORIES: extra include directories when building your code
  • PPLNN_SOURCE_EXTERNAL_LINK_DIRECTORIES: extra link directories when building your code
  • PPLNN_SOURCE_EXTERNAL_LINK_LIBRARIES: extra link libraries when building your code
  • PPLNN_SOURCE_EXTERNAL_COMPILE_DEFINITIONS: extra compile definitions when building your code

and the following for specific modules:

  • PPLNN_SOURCE_EXTERNAL_ONNX_MODEL_SOURCES: source files for onnx model
  • PPLNN_SOURCE_EXTERNAL_PMX_MODEL_SOURCES: source files for pmx model

In this form you don't need to write extra configurations and .os are packed into the ppl.nn libraries.

You may also set PPLNN_VERSION_STR(in the form of <major>.<minor>.<patch>) and PPLNN_COMMIT_STR(a string) to the internal version info to override the default values.

Example:

set(PPLNN_SOURCE_EXTERNAL_SOURCES foo.cc bar.cc)
set(PPLNN_SOURCE_EXTERNAL_INCLUDE_DIRECTORIES /path/to/include)

set(PPLNN_VERSION_STR '1.0.0')
set(PPLNN_COMMIT_STR '1e1065')

add_subdirectory(pplnn_source_dir)

4. Manually Specifying Everything

Good luck!