Re: [bug-gnuastro] make gnuastro crashes

[Mohammad Akhlaghi]

Hi Christopher,

Thanks for reporting this crash.

`fffree' is CFITSIO's internal name for the `fits_free_memory' function:

http://heasarc.gsfc.nasa.gov/docs/software/fitsio/c/c_user/node38.html
(last line in the page.)

In Gnuastro, its used in two occasions to free the header keyword 
strings that CFITSIO allocated (as recommended by CFITSIO).

So for some reason, while building the programs, the linker is unable to 
link with CFITSIO. Arithmetic is the first Gnuastro program to be built 
(after the libraries are built), so this issue isn't unique to 
Arithmetic and will come up in all the programs that use FITS keywords 
(for example if you run `make -k').

I hadn't encountered this problem before, because the `./configure' 
scripts tries linking with CFITSIO which has passed on your system.

Just as a short test, could you try opening Gnuastro's `configure' 
script in a text editor and changing all instances of `ffopen' (the 
CFITSIO function that is tested at configure time) to `fffree' and 
re-running `./configure'?

The result of this test should be helpful in finding a solution.

Just as a side-note, CFITSIO has some configure time options that can 
you can greatly benefit from when using Gnuastro (for example file 
reentrancy to open a file simultaneously on multiple threads), They are 
described in the Gnuastro manual:

https://www.gnu.org/software/gnuastro/manual/html_node/CFITSIO.html

Cheers,
Mohammad