diff -up hdf-4.2.4-snap8/hdf/src/hdfi.h.sparc hdf-4.2.4-snap8/hdf/src/hdfi.h
--- hdf-4.2.4-snap8/hdf/src/hdfi.h.sparc	2010-02-01 13:28:25.361387271 -0700
+++ hdf-4.2.4-snap8/hdf/src/hdfi.h	2010-02-01 13:31:46.343387138 -0700
@@ -77,6 +77,7 @@
 #define     DFMT_LINUX64        0x4441
 #define     DFMT_POWERPC64      0x1111
 #define     DFMT_LINUXPPC       0x1111
+#define     DFMT_LINUXSPARC     0x1111
 
 /* I/O library constants */
 #define UNIXUNBUFIO 1
@@ -1392,6 +1393,66 @@ typedef long              hdf_pint_t;   
 
 #endif /*Linux PPC */
 
+/* Linux Sparc32/64 */
+#if defined __sparc__ || defined __sparc64__
+
+#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_LINUXPPC
+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;
+#ifdef _LP64 /* 64-bit environment */
+typedef int               int32;
+typedef unsigned int      uint32;
+#else /* 32-bit environment */
+typedef long int          int32;
+typedef unsigned long int uint32;
+#endif
+typedef int               intn;
+typedef unsigned int      uintn;
+typedef int               intf;     /* size of INTEGERs in Fortran compiler */
+typedef float             float32;
+typedef double            float64;
+#ifdef _LP64 /* 64-bit environment */
+typedef long              hdf_pint_t;   /* an integer the same size as a pointer */
+#else /* 32-bit environment */
+typedef int               hdf_pint_t;   /* an integer the same size as a pointer */
+#endif
+#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 Sparc32/64 */
+
 /*-----------------------------------------------------*/
 /* 64-bit Free BSD */