- **labels**: --> Fixed_2_21_0
- **status**: Started --> Fixed
- **Patch**: push -->
---
** [issues:#5450] relocate.cc: Introduce new command `set?'.**
**Status:** Fixed
**Labels:** Fixed_2_21_0
**Created:** Fri Dec 21, 2018 04:55 PM UTC by Werner LEMBERG
**Last Updated:** Sun Dec 30, 2018 11:18 AM UTC
**Owner:** Werner LEMBERG
relocate.cc: Introduce new command `set?`.
Contrary to `set`, `set?` won't override environment variables that are
already set.
We need this for reproducable builds, in particular with gub: The standard
fontconfig setup includes font files like `~/.fonts` or `/usr/share`, which
obviously must not be used. Up to now, the `fontconfig.reloc` file in gub
uses the `set` relocation command, which doesn't allow gub to replace the
fontconfig configuration file with a temporary alternative while building
test files or documentation. Future changes in gub will use `set?` instead.
http://codereview.appspot.com/345160043
---
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