cd $AMBERHOME
patch -p0 -N -r patch_rejects < ptraj_2010-07-08-fixEndian.patch 

Author: Daniel R. Roe
Date: 2010-07-08
Description:
Fixes reading of hex values on big endian machines which prevented
correct identification of files and/or reading incorrect number of
frames in gzipped trajectory files.
-----------------------------------------------------------------------------
--- AmberTools/src/ptraj/io.c	2010-07-08 11:23:02.546875000 -0400
+++ AmberTools/src/ptraj/io.c	2010-07-08 15:22:02.843750000 -0400
@@ -680,7 +680,8 @@
  */
 int gzipFileSize(char *filename) {
   FILE *infile;
-  int b1,b2,b3,b4,val;
+  uint8_t b1,b2,b3,b4;
+  int val;
 
   if (filename==NULL) return -1;
   if ( (infile = fopen(filename,"rb"))==NULL ) {
@@ -774,7 +775,7 @@
  *  -2: Internal error
  */
 int id_Filesig(char *filename, FILE *infile) {
-  int *h;
+  uint8_t *h;
   int i, type;
 
   /* Check that either filename or infile is specified, but not both */
@@ -797,7 +798,7 @@
     rewind(infile);
 
   /* Read first 3 bytes from file */
-  h=(int*) calloc(3,sizeof(int));
+  h=(uint8_t*) calloc(3,sizeof(uint8_t));
   fread(h,1,1,infile);
   fread(h+1,1,1,infile);
   fread(h+2,1,1,infile);