Image Overview: gcc-musl

stable cgr.dev/chainguard/gcc-musl

Minimal container image for building C applications (which do not require glibc).

Get It! #

The image is available on cgr.dev:

docker pull cgr.dev/chainguard/gcc-musl:latest

Usage #

To build the C application in examples/hello/main.c:

$ docker run --rm -v "${PWD}:/work" cgr.dev/chainguard/gcc-musl examples/hello/main.c -o hello

This will write a Linux binary to ./hello. If you’re on Linux and have the musl library, you should be able to run it directly. Otherwise you can run it in a container e.g:

$ docker run --rm -v "$PWD/hello:/hello" cgr.dev/chainguard/musl-dynamic /hello
Hello World!

We can also do this all in a multi-stage Dockerfile e.g:

FROM cgr.dev/chainguard/gcc-musl as build

COPY hello.c /work/hello.c
RUN cc hello.c -o hello

FROM cgr.dev/chainguard/musl-dynamic

COPY --from=build /work/hello /hello
CMD ["/hello"]

And we can also compile statically to be used in environments without musl:

FROM cgr.dev/chainguard/gcc-musl as build

COPY hello.c /work/hello.c
RUN cc --static hello.c -o hello

FROM cgr.dev/chainguard/static

COPY --from=build /work/hello /hello
CMD ["/hello"]