PMT Library

https://wiki.gnuradio.org/index.php/Polymorphic_Types_(PMTs)

PMT Objects represent a serializable container of data that can be passed across various interfaced. In GNU Radio, these are used to carry data on stream tags or through message passing, and could be used to pass data to external consumers of GNU Radio. This PMT library restructures the API beyond what has previously been included in the GNU Radio codebase to more closely align with the functionality and usability in the C++ Standard Template Library, and uses std::variant for the underlying data storage and serialization

Dependencies

• meson
• ninja
• C++20

Installation

PMTlib uses meson and ninja to manage the build process, which can be installed via pip and your package manager

pip install meson
cd pmt
meson setup build --buildtype=debugoptimized --prefix=[PREFIX] --libdir=lib
cd build
ninja
ninja install

Build with emscripten

The path to emsdk must be provided. It can be done in 2 different ways.

Option 1

Create file emscripten-toolchain.ini in the project root directory with the following content:

[constants]
toolchain = '/path/to/emsdk/upstream/emscripten/'

And then execute the following command:

meson setup build_wasm --cross-file emscripten-toolchain.ini --cross-file emscripten-build.ini -Denable_python=false -Denable_testing=true

Option 2

Set toolchain constant directly in emscripten-build.ini file in [constants] section:

[constants]  
...
toolchain = '/path/to/emsdk/upstream/emscripten/'

And then execute the following command:

meson setup build_wasm --cross-file emscripten-build.ini -Denable_python=false -Denable_testing=true

The next steps are:

cd build_wasm
ninja
ninja test

Potential problems

If error Dependency gtest found: NO occurred, do the following commands:

cd [pmt_project_root_dir]
meson wrap install gtest

It creates subprojects/gtest.wrap wrap file for gtest.