[svn-r13474] Purpose: Fixed bugs

Description:
    VMS revealed a problem in calling C++ test functions from C AddTest.

Solution:
    Per Quincey's suggestion, added
        #ifdef __cplusplus
        extern "C"
        #endif
    to the called C++ functions.

Platforms tested
    AIX 5.1 (copper)
    Linux 2.6 (kagiso)
    On pending: waiting for Elena to test on VMS when she comes back.

c++/test/h5cpputil.h

@@ -95,6 +95,9 @@ class InvalidActionException : public Exception {
 };
 
 /* Prototypes for the test routines */
+#ifdef __cplusplus
+extern "C" {
+#endif
 void test_attr(void);
 void test_compound(void);
 void test_file(void);
@@ -113,6 +116,11 @@ void cleanup_h5s(void);
 void cleanup_reference(void);
 void cleanup_types(void);
 void cleanup_vlstrings(void);
+
+#ifdef __cplusplus
+}
+#endif
+
 /* not yet
 void cleanup_select(void);
 void cleanup_time(void);

c++/test/tattr.cpp

@@ -1200,8 +1200,10 @@ test_string_attr(void)
 **  test_attr(): Main attribute testing routine.
 **
 ****************************************************************/
-void
-test_attr(void)
+#ifdef __cplusplus
+extern "C"
+#endif
+void test_attr(void)
 {
     // Output message about test being performed
     MESSAGE(5, ("Testing Attributes\n"));

c++/test/tcompound.cpp

@@ -596,7 +596,7 @@ static void test_compound_6(void)
 	buf = (unsigned char*)malloc(nelmts * MAX(sizeof(src_typ_t), sizeof(dst_typ_t)));
 	bkg = (unsigned char*)malloc(nelmts * sizeof(dst_typ_t));
 	orig = (unsigned char*)malloc(nelmts * sizeof(src_typ_t));
-	for (int i=0; i<nelmts; i++) {
+	for (i=0; i<nelmts; i++) {
 	    s_ptr = ((src_typ_t*)orig) + i;
 	    s_ptr->b    = (i*8+1) & 0x7fff;
 	    s_ptr->d    = (i*8+6) & 0x7fff;
@@ -731,6 +731,9 @@ static void test_compound_7(void)
  *
  *-------------------------------------------------------------------------
  */
+#ifdef __cplusplus
+extern "C"
+#endif
 void test_compound(void)
 {
     // Output message about test being performed

c++/test/tfile.cpp

@@ -492,8 +492,10 @@ test_file_name()
  *
  *-------------------------------------------------------------------------
  */
-void
-test_file(void)
+#ifdef __cplusplus
+extern "C"
+#endif
+void test_file(void)
 {
     // Output message about test being performed
     MESSAGE(5, ("Testing File I/O operations\n"));

c++/test/tfilter.cpp

@@ -248,6 +248,9 @@ void test_szip_filter(H5File& file1)
 **
 ****************************************************************/
 const H5std_string      FILE1("tfilters.h5");
+#ifdef __cplusplus
+extern "C"
+#endif
 void test_filters(void)
 {
     // Output message about test being performed

c++/test/th5s.cpp

@@ -591,8 +591,10 @@ test_h5s_compound_scalar_read(void)
  * Modifications:
  *-------------------------------------------------------------------------
  */
-void
-test_h5s(void)
+#ifdef __cplusplus
+extern "C"
+#endif
+void test_h5s(void)
 {
     // Output message about test being performed
     MESSAGE(5, ("Testing Dataspaces\n"));

c++/test/trefer.cpp

@@ -277,8 +277,10 @@ test_reference_obj(void)
 **  test_reference(): Main reference testing routine.
 **
 ****************************************************************/
-void
-test_reference(void)
+#ifdef __cplusplus
+extern "C"
+#endif
+void test_reference(void)
 {
     // Output message about test being performed
     MESSAGE(5, ("Testing References\n"));

c++/test/ttypes.cpp

@@ -774,6 +774,9 @@ cerr << "all the way here?" << endl;
 **  test_types(): Main data types testing routine.
 **
 ****************************************************************/
+#ifdef __cplusplus
+extern "C"
+#endif
 void test_types(void)
 {
     // Output message about test being performed

c++/test/tvlstr.cpp

@@ -758,6 +758,9 @@ static void test_vl_rewrite(void)
 **  test_vlstrings(): Main VL string testing routine.
 **
 ****************************************************************/
+#ifdef __cplusplus
+extern "C"
+#endif
 void test_vlstrings(void)
 {
     // Output message about test being performed