diff -up hdf-4.2.10/hdf/src/hconv.h.arm hdf-4.2.10/hdf/src/hconv.h
--- hdf-4.2.10/hdf/src/hconv.h.arm	2014-02-14 09:28:56.692514796 -0700
+++ hdf-4.2.10/hdf/src/hconv.h	2014-02-14 09:30:03.882212944 -0700
@@ -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(__arm__)
 #       define UI8_IN     DFKnb1b   /* Unsigned Integer, 8 bits */
 #       define UI8_OUT    DFKnb1b
 #       define SI16_IN    DFKnb2b   /* S = Signed */
diff -up hdf-4.2.10/hdf/src/hdfi.h.arm hdf-4.2.10/hdf/src/hdfi.h
--- hdf-4.2.10/hdf/src/hdfi.h.arm	2014-02-14 09:28:56.685514824 -0700
+++ hdf-4.2.10/hdf/src/hdfi.h	2014-02-14 09:28:56.693514792 -0700
@@ -78,6 +78,7 @@
 #define     DFMT_LINUXPPC       0x1111
 #define     DFMT_LINUXSPARC     0x1111
 #define     DFMT_LINUX390       0x1111
+#define     DFMT_LINUXARM       0x4441
 
 /* I/O library constants */
 #define UNIXUNBUFIO 1
@@ -1187,6 +1188,57 @@ typedef int               hdf_pint_t;
 
 #endif /* Linux s390/s390x */
 
+/* Linux ARM */
+#if defined __arm__
+
+#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
+
+#include <sys/file.h>               /* for unbuffered i/o stuff */
+#include <sys/stat.h>
+#define DF_MT             DFMT_LINUXARM
+typedef void              VOID;
+typedef void              *VOIDP;
+typedef char              *_fcd;
+typedef char              char8;
+typedef unsigned char     uchar8;
+typedef char              int8;
+typedef unsigned char     uint8;
+typedef short int         int16;
+typedef unsigned short int uint16;
+typedef long int          int32;
+typedef unsigned long int uint32;
+typedef int               intn;
+typedef unsigned int      uintn;
+typedef int               intf;     /* size of INTEGERs in Fortran compiler */
+typedef float             float32;
+typedef double            float64;
+typedef int               hdf_pint_t;   /* an integer the same size as a pointer */
+#define FNAME_POST_UNDERSCORE
+#define _fcdtocp(desc) (desc)
+#ifdef  HAVE_FMPOOL
+#define FILELIB PAGEBUFIO  /* enable page buffering */
+#else
+#define FILELIB UNIXBUFIO
+#endif
+
+/* JPEG #define's - Look in the JPEG docs before changing - (Q) */
+
+/* Determine the memory manager we are going to use. Valid values are: */
+/*  MEM_DOS, MEM_ANSI, MEM_NAME, MEM_NOBS.  See the JPEG docs for details on */
+/*  what each does */
+#define JMEMSYS         MEM_ANSI
+
+#ifdef __GNUC__
+#define HAVE_STDC
+#define INCLUDES_ARE_ANSI
+#endif
+
+#endif /* Linux ARM */
+
 /*-----------------------------------------------------*/
 /* 64-bit Free BSD */