--- HDF4.2r1/hdf/src/hdfi.h.orig	2005-01-24 20:36:44.000000000 -0700
+++ HDF4.2r1/hdf/src/hdfi.h	2006-02-02 21:54:59.347516688 -0700
@@ -72,6 +72,7 @@
 #define     DFMT_CRAYMPP        0x1171
 #define     DFMT_IA64           0x4441
 #define     DFMT_LINUX64        0x4441
+#define     DFMT_LINUXPPC       0x1111
 
 /* I/O library constants */
 #define UNIXUNBUFIO 1
@@ -1326,6 +1327,57 @@
 
 #endif /*Linux 64 */
 
+/* Linux PPC */
+#if defined __PPC__
+
+#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;
+typedef int               int32;
+typedef unsigned 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 long              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 PPC */
+
 /*#ifndef GOT_MACHINE
 No machine type has been defined.  Your Makefile needs to have someing like
 -DSUN or -DUNICOS in order for the HDF internal structures to be defined