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AddingCustomCompilersOverview.md

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This is an overview of what building and adding a compiler to the site looks like, using GCC as an example, but note that the process is similar for all other types of compilers.

  • Build GCC versions with the relevant magic. We build all our own GCCs using Docker from this repo
  • For non-trunk builds we manually run the docker image. For trunk dailies we have a cron job that runs a script to build them.
  • Built tarballs are uploaded to S3, and installed by our custom tool from a YAML configuration file
  • The installation puts compilers on a shared NFS drive at /opt/compiler-explorer/gcc-some-version/
  • We then configure CE to look for the compiler here.
  • If we need to customise the way we execute the compiler and/or display the results, then we can change the "driver" for the compiler. Usually we can just override a few aspects of the driver, relying on the defaults from the base driver.
  • Any UI changes are a bit more work.

More info still in Adding a Compiler, and if you can bear listening to Matt, here's a talk about some behind the scenes stuff, with slides online.