[svn-r12870] Add a new macro H5_HAVE_DIRECT_ALIGN in configure.in. Some systems like copper and sleipnir

doesn't require alignment for Direct I/O.  If this's true, write or read data just like sec2
does.

1 files changed, 83 insertions, 0 deletions

diff --git a/configure b/configure
index d4377b5..91c8792 100755
--- a/configure
+++ b/configure
@@ -51071,6 +51071,89 @@ else
 fi
 
 
+
+if test ${hdf5_direct_io} = "yes"; then
+    echo "$as_me:$LINENO: checking for Direct VFD alignment requirement" >&5
+echo $ECHO_N "checking for Direct VFD alignment requirement... $ECHO_C" >&6
+
+    if test "${hdf5_direct_align+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test "$cross_compiling" = yes; then
+  { { echo "$as_me:$LINENO: error: cannot run test program while cross compiling
+See \`config.log' for more details." >&5
+echo "$as_me: error: cannot run test program while cross compiling
+See \`config.log' for more details." >&2;}
+   { (exit 1); exit 1; }; }
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+            #include <stdlib.h>
+	    #include <sys/types.h>
+	    #include <sys/stat.h>
+	    #include <fcntl.h>
+            int main(void)
+            {
+                 int *buf;
+                 int fid;
+                 fid=open("tst_file", O_CREAT | O_TRUNC | O_DIRECT | O_RDWR, 0755);
+                 buf = (int*)malloc(sizeof(int));
+                 if(write(fid, (void*)buf, sizeof(int))<0) {
+                     close(fid);
+                     free(buf);
+                     remove("tst_file");
+		     exit(1);
+                 }
+                 close(fid);
+                 remove("tst_file");
+                 free(buf);
+                 exit (0);
+             }
+_ACEOF
+rm -f conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  hdf5_direct_align=no
+else
+  echo "$as_me: program exited with status $ac_status" >&5
+echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+( exit $ac_status )
+hdf5_direct_align=yes
+fi
+rm -f core *.core gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
+fi
+fi
+
+
+    if test ${hdf5_direct_align} = "yes"; then
+        echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_DIRECT_ALIGN 1
+_ACEOF
+
+    else
+        echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+    fi
+fi
+
 echo "$as_me:$LINENO: checking whether exception handling functions is checked during data conversions" >&5
 echo $ECHO_N "checking whether exception handling functions is checked during data conversions... $ECHO_C" >&6
 # Check whether --enable-dconv-exception or --disable-dconv-exception was given.