el_runtime.c uses pow/sqrt/log/sin/cos/exp - needs -lm.
elc-bootstrap.c predates the text-processing primitives commit so it
has its own C definitions of is_digit/is_whitespace; -Wl,--allow-multiple-definition
lets the linker accept both (equivalent implementations).
- .gitea/workflows/sdk-release.yaml: build elc from bootstrap, run tests,
publish latest release, dispatch el-sdk-updated to downstream repos
- install.sh: one-command El SDK install from Gitea release