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** [issues:#2277] GUB should bail unless a special env var is set**
**Status:** Accepted
**Labels:** GUB
**Created:** Fri Feb 03, 2012 10:37 AM UTC by Anonymous
**Last Updated:** Fri Feb 03, 2012 10:37 AM UTC
**Owner:** nobody
*Originally created by:* *anonymous
*Originally created by:*
[[email protected]](http://code.google.com/u/107782479450604073806/)
GUB checks the host environment; if anything has changed, then it rebuilds all
packages, taking 2 or 3 times as long to build the binaries.
The CG has a helpful little script which sets up a new bash shell with exactly
the environment you want. Unfortunately, sometimes I forget to run that
script, so it starts rebuilding everything. I generally notice halfway
through, but then I'm concerned about leaving the cross-compile with some
packages rebuilt and some not rebuilt, so I just delete everything and start
from scratch.
It would be nice if the "make lilypond" target in GUB first checked if there
was a GUB\_OK\_TO\_BUILD environment variable \(or something like that\), and
if there wasn't, it just exited with a message.
If we'd had this simple check, the 2.15.28 release would have been at least six
hours earlier than it actually will be, as well as saving literally days of
compiling time in the past.
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