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Log message for linktime composition on Windows (backport #640) #744

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Merged
merged 2 commits into from
Oct 6, 2025
Merged

Log message for linktime composition on Windows (backport #640) #744

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41436e4
Log message for linktime composition on Windows (#640)
Yadunund Oct 3, 2025
2d68d77
fixed merge
ahcorde Oct 3, 2025
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2 changes: 1 addition & 1 deletion composition/README.md
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Expand Up @@ -41,7 +41,7 @@ The process will open each library and create one instance of each “rclcpp::No
ros2 run composition dlopen_composition `ros2 pkg prefix composition`/lib/libtalker_component.so `ros2 pkg prefix composition`/lib/liblistener_component.so
```

### Linktime Composition
### Linktime Composition (not supported on Windows)

Similar to previous, this runs `linktime_composition` which **links all classes from libraries** that are registered under the **library_path** with the **linker**.

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7 changes: 7 additions & 0 deletions composition/src/linktime_composition.cpp
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Expand Up @@ -36,6 +36,13 @@ int main(int argc, char * argv[])
std::vector<std::unique_ptr<class_loader::ClassLoader>> loaders;
std::vector<rclcpp_components::NodeInstanceWrapper> node_wrappers;

// Linktime composition is not supported on Windows.
#ifdef _WIN32
RCLCPP_ERROR(logger, "Linktime composition is not supported on Windows.");
rclcpp::shutdown();
return 0;
#endif // _WIN32

std::vector<std::string> libraries = {
// all classes from libraries linked by the linker (rather then dlopen)
// are registered under the library_path ""
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