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+# musl Static Build Challenges
+
+This document explains why RustNet currently does not provide musl static builds and the technical challenges encountered during implementation attempts.
+
+## Background
+
+musl is a lightweight C standard library designed for static linking. It would allow RustNet to produce fully static binaries that work on any Linux distribution regardless of GLIBC version.
+
+## Why We Attempted musl Builds
+
+GitHub issue #40 reported that pre-built packages required GLIBC 2.38/2.39, which wasn't available on PopOS 22.04 (GLIBC 2.35). musl builds would theoretically solve this by creating fully static binaries.
+
+## Challenges Encountered
+
+### libpcap Linking Issues
+
+The primary challenge appears to be related to **libpcap** static linking with musl:
+
+- Installing `libpcap-dev` in Ubuntu-based cross-rs containers provides glibc-linked libraries
+- Attempting to statically link these with musl resulted in linker errors
+- Errors included undefined references to pthread, math (exp), and dynamic loading functions (dladdr)
+
+It's unclear whether this is due to:
+- Fundamental glibc/musl incompatibility when statically linking
+- Missing library specifications in the linker flags
+- Issues with how cross-rs musl images are configured
+- Something specific to our build configuration
+
+### eBPF Complications
+
+We initially attempted to include eBPF support, which required vendoring libelf and zlib. This was abandoned to simplify the problem, but even without eBPF the libpcap linking issues persisted.
+
+## Current Solution
+
+**We solved the original issue by pinning builds to ubuntu-22.04** (GLIBC 2.35), which ensures compatibility with PopOS 22.04 and similar distributions.
+
+For users on older distributions, the `cargo install` workaround is documented:
+```bash
+cargo install rustnet-monitor
+sudo setcap cap_net_raw,cap_net_admin=eip ~/.cargo/bin/rustnet
+```
+
+## Potential Future Approaches
+
+If someone wants to tackle musl builds in the future, areas to investigate:
+
+1. **Building libpcap from source** targeting musl in the pre-build step
+2. **Using Alpine Linux-based images** which have native musl packages
+3. **Custom linker flags** to properly link required libraries
+4. **Alternative pure-Rust packet capture** libraries (if they exist)
+
+We're uncertain which approach would work best, or if there are other issues we haven't discovered yet.
+
+## Why We're Not Pursuing This Now
+
+- The ubuntu-22.04 solution already addresses the reported issue
+- The complexity-to-benefit ratio seems high
+- `cargo install` provides a universal fallback for edge cases
+- More investigation would be needed to understand the root causes
+
+If you have experience with musl static linking and want to contribute, we'd welcome the help!
+
+---
+
+*Last updated: 2025-10-09*
+*Status: Not currently pursuing due to linking complexity*