On a 64-bit architecture such as IRIX64, CFITSIO will have to be compiled in the same binary format as the HEALPix codes. This can be achieved by typing the following on the command line in the CFITSIO directory:
rm config.cache setenv CC 'cc -n32' ./configure make
Alternatively you can replace the -n32 with -64. You can then force compilation to the same binary format by entering either -n32 or -64 when asked for the optimisation options in the HEALPix configure script.
Eric Hivon 2003-02-07