Bug#742421: libhdf4: that fix won't quite work on Debian

[Rebecca Palmer]

(from debian/patches/hdfi.h at 
https://launchpad.net/ubuntu/+source/libhdf4/4.2r10-0ubuntu1 )
> --- a/HDF4/hdf/src/hconv.h
> +++ b/HDF4/hdf/src/hconv.h
> @@ -59,7 +59,7 @@
>  /* CONSTANT DEFINITIONS                                                      */
>  /*****************************************************************************/
>  /* Generally Big-Endian machines */
> -#if !defined(INTEL86) && !defined(MIPSEL) && !defined(DEC_ALPHA) && !defined(I860) && !defined(SUN386) && !(defined(__ia64) && !(defined(hpux) || defined(__hpux))) && !defined(__x86_64__)
> +#if !defined(INTEL86) && !defined(MIPSEL) && !defined(DEC_ALPHA) && !defined(I860) && !defined(SUN386) && !(defined(__ia64) && !(defined(hpux) || defined(__hpux))) && !defined(__x86_64__) && (defined(__powerpc__) && !defined(__LITTLE_ENDIAN__)) && !defined(__aarch64__) && !defined(__ARM_EABI__)

That treats anything that isn't powerpc as little-endian, which happens 
to be true in Ubuntu, but isn't in Debian.

If you want to keep this (weird, and fragile in that it silently treats 
anything it doesn't recognise as big-endian) form use

+#if !defined(INTEL86) && !defined(MIPSEL) && !defined(DEC_ALPHA) && 
!defined(I860) && !defined(SUN386) && !(defined(__ia64) && 
!(defined(hpux) || defined(__hpux))) && !defined(__x86_64__) && 
!(defined(__powerpc__) && defined(__LITTLE_ENDIAN__)) && 
!defined(__aarch64__) && !defined(__ARM_EABI__)

but if it were my package I'd probably do something similar to #761203 ( 
https://bugs.debian.org/cgi-bin/bugreport.cgi?msg=5;filename=naref_endianness.patch;att=1;bug=761203 
)