Re: ISIS and heasoft 6.6

On Dec 3, 2008, at 7:06 AM, John Houck wrote:

> The newest xspec release has introduced some changes that are
> incompatible with the xspec module in the currently released
> version of isis.  I discovered this particular problem
> yesterday and after getting past it with a simple workaround,
> I encountered another problem as well.

Keep in mind that essentially every 0.0.1 increment of HEASOFT, John  
has to twiddle the make files on ISIS because the XSPEC folks have  
changed something.  So, one usually has to wait a little bit (i.e., a  
week or two) between a recent release of HEASOFT and a compatible  
ISIS.  (Often the lag is my fault, since I do the HEASOFT builds, and  
given that this is the 8th one in 2 years, it's getting tiring to keep  
up.)  With Sherpa, for example, the answer is to build against a  
static snapshot of the XSPEC models, thus you get a version that's  
probably 6 months old, and doesn't have access to the XSPEC local  
models.

One interesting thing to note: they claim this is the last HEASOFT  
release with XSPEC V11, since they don't want to keep up with  
compilers for the old one.  (The recent gcc 3.4 -> gcc4.1, 4.2, or 4.3  
transition being a case in point.)  I am much more used to building  
local models against XSPEC v11, and ISIS has no problem incorporating  
those into a session.  Should be jolly good fun making sure that  
starting with XSPEC 6.6.1 (undoubtedly released in time for Xmas), we  
do that with XSPEC 12 only...

-Mike


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