3 lines
259 B
Markdown
3 lines
259 B
Markdown
# CERNLIB {#cernlib-hook}
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This hook sets the `CERN`, `CERN_LEVEL`, and `CERN_ROOT` environment variables. They are part of [CERNLIB's build system](https://cernlib.web.cern.ch/install/install.html), and are are needed for some programs to compile correctly.
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