[svn-r13865] Purpose: Adding a new macro, H5_HAVE_OFFSETOF.

Description: When the compiler has the __offsetof__ extension, the
             H5_HAVE_OFFSETOF macro will be defined. When the compiler
             does not have the extension, the macro will remain undefined.

Tested: kagiso

1 files changed, 61 insertions, 2 deletions

diff --git a/configure b/configure
index f453c30..6665eca 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Id: configure.in 13846 2007-06-08 13:12:13Z mcgreevy .
+# From configure.in Id: configure.in 13850 2007-06-11 18:51:20Z koziol .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.61 for HDF5 1.8.0-beta1post1.
 #
@@ -1645,7 +1645,7 @@ Optional Packages:
   --with-pthread=DIR      Use the Pthreads library [default=no]
   --with-mpe=DIR          Use MPE instrumentation [default=no]
   --with-default-vfd=driver
-                          Specify default file driver [default=]
+                          Specify default file driver [default=sec2]
 
 Some influential environment variables:
   CC          C compiler command
@@ -47767,6 +47767,65 @@ fi
 
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 
+{ echo "$as_me:$LINENO: checking for __offsetof__ extension" >&5
+echo $ECHO_N "checking for __offsetof__ extension... $ECHO_C" >&6; }
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+#ifdef FC_DUMMY_MAIN
+#ifndef FC_DUMMY_MAIN_EQ_F77
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int FC_DUMMY_MAIN() { return 1; }
+#endif
+#endif
+int
+main ()
+{
+size_t __offsetof__(unused)
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_OFFSETOF 1
+_ACEOF
+
+               { echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6; }
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	{ echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6; }
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
 { echo "$as_me:$LINENO: checking how to print long long" >&5
 echo $ECHO_N "checking how to print long long... $ECHO_C" >&6; }
 if test "${hdf5_cv_printf_ll+set}" = set; then