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This article outlines a method to statically link PipeWire in Tuple's Linux pair programming tool without modifying PipeWire's source code. It details how to implement a fake dynamic linker to bypass the need for dlopen and related functions, allowing users to create a fully static executable.
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Mason Remaley outlines a solution for Tuple's challenge in creating a static build of PipeWire for their Linux-based pair programming tool. The primary hurdle arises from PipeWireβs reliance on dynamic linking via `dlopen`, which complicates the goal of a fully static executable. Remaley provides a build configuration using Zig that enables a static build without altering the upstream PipeWire code, streamlining future maintenance and updates.
The strategy involves creating replacements for the dynamic loading functions `dlopen`, `dlsym`, `dlclose`, and others. By defining a custom library structure in Zig, the article explains how to map symbol names to pointers, allowing the static build to interact with the required functionalities without relying on the system's dynamic linker. This is achieved through clever use of preprocessor flags to redirect calls to the custom implementations, effectively tricking the library into using these static versions.
Remaley emphasizes the importance of not modifying the upstream PipeWire source code, which would require ongoing maintenance of a fork. Instead, the approach maintains an easy-to-audit build process by fetching the necessary source directly during the build. The article walks through the implementation details, highlighting how the approach aligns with PipeWire's API requirements while circumventing the limitations of dynamic linking.
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