This repository has the Dockerfile for source build of gcc 15 with gfortran.
Also includes standard openmpi and lapack libraries, valgrind, and basic build tools.
The devel branch has the latest master build (at time of Docker build).
Corresponding auto-build docker available at https://registry.hub.docker.com/u/cmbant/docker-gcc-build/
To make an interactive shell ready for compiling you local code at /local/code/source do
docker run -v /local/code/source:/virtual/path -i -t cmbant/docker-gcc-build /bin/bash
Navigating into /virtual/path in the bash shell, you can then run make etc as normal, acting on your local files.