[MacPorts] #62341: macOS arm64 version of hdf4 produces wrong results

[MacPorts]

#62341: macOS arm64 version of hdf4 produces wrong results
-------------------------+--------------------
 Reporter:  svniemeijer  |      Owner:  (none)
     Type:  defect       |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:
-------------------------+--------------------
 When running the following program against any of the files from
 https://nsidc.org/data/NISE

 {{{
 #include <assert.h>
 #include <stdio.h>
 #include "hdf.h"
 #include "mfhdf.h"

 int main(int argc, char *argv[])
 {
     int32 sd_id, sds_id, rank, dimsizes[H4_MAX_VAR_DIMS], data_type,
 num_attributes, i;
     char sds_name[H4_MAX_NC_NAME + 1];
     int result;

     sd_id = SDstart("NISE_SSMISF18_20210111.HDFEOS", DFACC_READ);
     sds_id = SDselect(sd_id, 0);
     result = SDgetinfo(sds_id, sds_name, &rank, dimsizes, &data_type,
 &num_attributes);
     assert(result == 0);
     for (i = 0; i < rank; i++)
     {
         printf("%d\n", dimsizes[i]);
     }
     return 0;
 }
 }}}

 On x86_64 this gives 721 (twice). But on arm64 it gives -788398080
 (twice).

 The data is rank 2, 721 x 721. So the x86_64 output is correct.

 It looks like the arm64 build of HDF4 is incorrectly treating the platform
 as big endian.

-- 
Ticket URL: <https://trac.macports.org/ticket/62341>
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