Image Overview: gcc-glibc

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Minimal container image for building C applications (which require glibc).

Get It!

The image is available on cgr.dev:

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

Usage

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

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

This will write a Linux binary to ./hello. If you’re on Linux and have the glibc 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" --platform linux/amd64 cgr.dev/chainguard/glibc-dynamic /hello
Hello World!

Note: only linux/amd64 is uspported at the moment.

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

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

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

FROM cgr.dev/chainguard/glibc-dynamic

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

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

FROM cgr.dev/chainguard/gcc-glibc 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"]