[Developers] CactusExternal/HDF5 is dangerous

Erik Schnetter schnetter at aei.mpg.de
Mon Apr 25 15:40:10 CDT 2005

I used CactusExternal/HDF5 to configure with HDF5, and I find that it 
runs the configuration script at compile time instead of at 
configuration time.  This is dangerous.  When a system administrator 
installs a new version of the HDF5 library, thorn HDF5 might pick it up 
and silently change which version of HDF5 the code is compiled against.  
This can lead to inconsistencies that are next to impossible to detect 
and which can lead to segmentation faults.

A configuration script needs to run at configuration time; the 
configuration settings must stay constant at compile time.


Erik Schnetter <schnetter at aei.mpg.de>   http://www.aei.mpg.de/~eschnett/

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