[svn-r16306] Description:

	Bring r16305 back from revise_chunks branch:

	Add detection of C99 "designated initializers" to configure script and
use new H5_HAVE_C99_DESIGNATED_INITIALIZER macro to conditionally compile
default layout variables in src/H5Pdcpl.c

	Also, minor code cleanups, etc.

Tested on:
	FreeBSD/32 6.3 (duty) in debug mode
	(Other platforms tested on branch)

1 files changed, 67 insertions, 1 deletions

diff --git a/configure b/configure
index bb857f4..5c11006 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Id: configure.in 16194 2008-12-15 18:39:20Z mamcgree .
+# From configure.in Id: configure.in 16220 2008-12-28 11:28:04Z hdftest .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.61 for HDF5 1.9.27.
 #
@@ -46894,6 +46894,72 @@ echo "${ECHO_T}no" >&6; }
 fi
 
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ echo "$as_me:$LINENO: checking for C99 designated initialization support" >&5
+echo $ECHO_N "checking for C99 designated initialization support... $ECHO_C" >&6; }
+cat >conftest.$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 ()
+{
+
+                typedef struct {
+                    int x;
+                    union {
+                        int i;
+                        double d;
+                    } u;
+                } di_struct_t;
+                di_struct_t x = {0, { .d = 0.0}};
+  ;
+  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.$ac_objext; then
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_C99_DESIGNATED_INITIALIZER 1
+_ACEOF
+
+               { echo "$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; }