The error occurs because the C development headers (specifically limits.h) are missing on your system. This is required by the txproto-sys crate's build script (which uses bindgen to generate Rust bindings from C headers).

Solution

Install the essential C development toolchain and headers:

sudo apt update
sudo apt install build-essential libc6-dev

Then retry the build from a clean state:

# Clean previous build artifacts
rm -rf kysdk/kymedia/target
rm -rf rootfs-x86_64-linux-gnu

# Re-run the build
./build-linux.sh

Why this works

• build-essential provides gcc, make, and other build tools
• libc6-dev provides the standard C library headers (including /usr/include/limits.h)
• The txproto-sys build script uses bindgen which requires these headers to generate Rust FFI bindings

If you still encounter issues, ensure your system is up-to-date (sudo apt full-upgrade) and consider installing additional development packages like libc-dev or linux-libc-dev.