n_os_tr/stack/build-common

Shared Alpine/musl static builder pattern

This directory defines the common static build base used by stack/* C99 binaries.

Why this exists

Per F30, every n-OS-tr C binary must be built in Alpine and statically linked against musl so ldd reports not a dynamic executable.

Files

• Dockerfile.alpine-musl: shared Alpine 3.19 base with common musl/static build dependencies.
• build_static.sh: generic wrapper that:
  • accepts <target-dir>
  • picks linux/amd64 or linux/arm64 using uname -m (or ARCH=arm64 override)
  • builds the shared base image and the target app image
  • extracts the built binary to <target-dir>/build/<basename>_static_<arch>

Invocation pattern from subtrees

Each stack component keeps its own Dockerfile.alpine-musl and a thin wrapper script:

./stack/<component>/build_static.sh

The component wrapper calls this shared script as:

../build-common/build_static.sh .

from inside that component directory.