Avoiding multiple downloads of FGData on Linux: Difference between revisions

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(Big correction. You have to have run download_and_compile.sh before you can use this technique. Directions are still untested.)
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The instructions below tell how to do this for existing or new uses of download_and_compile.sh.  The tecnical details are not dependent on where you put your builds.  You can use the directory scheme I use or your own existing scheme.   
The instructions below tell how to do this for existing or new uses of download_and_compile.sh.  The tecnical details are not dependent on where you put your builds.  You can use the directory scheme I use or your own existing scheme.   


The concept as a whole works great.  I've been using it for months.  The instructions are a work in progress and have yet to be fully tested.  The initial use case may have a bug related to allowing fgdata to be created through a link.  I'm not sure that will work.  I may need to tweak the initial directions.
The concept as a whole works great.  I've been using it for months.  The instructions are a work in progress and have yet to be fully tested.   


====The main ideas====
====The main ideas====
* you may only need one copy of each version of fgdata you are working with  
* you may only need one copy of each version of fgdata you are working with
* fgdata normally lives as a sub-directory in install/fgfs/
* fgdata normally lives as a sub-directory in install/fgfs/
* once it exists, install/fgdata can moved and replaced by a symbolic link to fgdata's real directory location
* once it exists, install/fgdata can moved and replaced by a symbolic link to fgdata's real directory location
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