diff -up hdf-4.2.15/hdf/src/hconv.h.ppc64le hdf-4.2.15/hdf/src/hconv.h

--- hdf-4.2.15/hdf/src/hconv.h.ppc64le	2020-04-30 21:25:25.183973672 -0600

+++ hdf-4.2.15/hdf/src/hconv.h	2020-04-30 21:25:25.191973677 -0600

@@ -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__) && !defined(__arm__) && !defined(__AARCH64EL__)

+#if !defined(INTEL86) && !defined(MIPSEL) && !defined(DEC_ALPHA) && !defined(I860) && !defined(SUN386) && !(defined(__ia64) && !(defined(hpux) || defined(__hpux))) && !defined(__x86_64__) && !defined(__arm__) && !defined(__AARCH64EL__) && !defined(__LITTLE_ENDIAN__)

 #       define UI8_IN     DFKnb1b   /* Unsigned Integer, 8 bits */

 #       define UI8_OUT    DFKnb1b

 #       define SI16_IN    DFKnb2b   /* S = Signed */

diff -up hdf-4.2.15/hdf/src/hdfi.h.ppc64le hdf-4.2.15/hdf/src/hdfi.h

--- hdf-4.2.15/hdf/src/hdfi.h.ppc64le	2020-04-30 21:25:25.183973672 -0600

+++ hdf-4.2.15/hdf/src/hdfi.h	2020-04-30 21:25:25.192973677 -0600

@@ -75,6 +75,7 @@

 #define     DFMT_IA64           0x4441

 #define     DFMT_LINUX64        0x4441

 #define     DFMT_POWERPC64      0x1111

+#define     DFMT_POWERPC64LE    0x4441

 #define     DFMT_LINUXPPC       0x1111

 #define     DFMT_LINUXSPARC     0x1111

 #define     DFMT_LINUX390       0x1111

@@ -926,18 +927,24 @@ typedef int               hdf_pint_t;

 /*-----------------------------------------------------*/

-/* Power PC 5 64 */

 #if defined __powerpc64__

-

+/* powerpc 64 bits */

 #ifdef GOT_MACHINE

 If you get an error on this line more than one machine type has been defined.

 Please check your Makefile.

 #endif

 #define GOT_MACHINE

+#ifdef __LITTLE_ENDIAN__

+/* Power PC 8 64 little endian */

+#define DF_MT             DFMT_POWERPC64LE

+#else

+/* Power PC 5 64 */

+#define DF_MT             DFMT_POWERPC64

+#endif

+

 #include <sys/file.h>               /* for unbuffered i/o stuff */

 #include <sys/stat.h>

-#define DF_MT             DFMT_POWERPC64

 typedef void              VOID;

 typedef void              *VOIDP;

 typedef char              *_fcd;

@@ -973,8 +980,9 @@ typedef long              hdf_pint_t;

 #define INCLUDES_ARE_ANSI

 #endif

+#endif /* powerpc 64 bits */

+

 /*-----------------------------------------------------*/

-#endif /*power PC 5 64 */

 /* Linux 64 */

 #if defined(__linux__) && defined __x86_64__  && !(defined  SUN)  /* i.e. 64-bit Linux  but not SunOS on Intel */

diff -up hdf-4.2.15/mfhdf/libsrc/xdrposix.c.ppc64le hdf-4.2.15/mfhdf/libsrc/xdrposix.c

--- hdf-4.2.15/mfhdf/libsrc/xdrposix.c.ppc64le	2020-04-30 21:25:25.186973674 -0600

+++ hdf-4.2.15/mfhdf/libsrc/xdrposix.c	2020-04-30 21:26:18.190001127 -0600

@@ -442,7 +442,7 @@ xdrposix_getlong(xdrs, lp)

     long *lp;

 {

     unsigned char *up = (unsigned char *)lp ;

-#if (defined AIX5L64 || defined __powerpc64__ || defined __s390x__ || (defined __hpux && __LP64__))

+#if (defined AIX5L64 || (defined __powerpc64__ && !defined __LITTLE_ENDIAN__) || defined __s390x__ || (defined __hpux && __LP64__))

     *lp = 0 ;

     up += (sizeof(long) - 4) ;

 #endif

@@ -465,7 +465,7 @@ xdrposix_putlong(xdrs, lp)

     netlong mycopy = htonl(*lp);

     up = (unsigned char *)&mycopy;

 #endif

-#if (defined AIX5L64  || defined __powerpc64__ || defined __s390x__ || (defined __hpux && __LP64__))

+#if (defined AIX5L64  || (defined __powerpc64__ && !defined __LITTLE_ENDIAN__) || defined __s390x__ || (defined __hpux && __LP64__))

     up += (sizeof(long) - 4) ;

 #endif