[svn-r27165] Merge 27133 & 27158 from trunk:

 - Add a new attribute function characterstic for format:
   * H5_ATTR_FORMAT(X,Y,Z)  __attribute__((format(X, Y, Z)))
 - Rename UNUSED attribute characterstic to H5_ATTR_UNUSED.
 - Rename NORETURN attribute characterstic to H5_ATTR_NORETURN

tested with h5committest.

28 files changed, 139 insertions, 139 deletions

diff --git a/test/app_ref.c b/test/app_ref.c
index 611d255..3052df7 100644
--- a/test/app_ref.c
+++ b/test/app_ref.c
@@ -80,7 +80,7 @@ void Abrt_Handler (int sig);
 
 /* Handler for SIGABRT - prints the reference count on each id */
 void
-Abrt_Handler (int UNUSED sig)
+Abrt_Handler (int H5_ATTR_UNUSED sig)
 {
     int i, n;
 
diff --git a/test/cache.c b/test/cache.c
index 26ef80f..df6d805 100644
--- a/test/cache.c
+++ b/test/cache.c
@@ -17994,14 +17994,14 @@ check_check_evictions_enabled_err(void)
 hbool_t rpt_fcn_called = FALSE;
 enum H5C_resize_status rpt_status;
 
-static void test_rpt_fcn(UNUSED H5C_t * cache_ptr,
-                  UNUSED int32_t version,
-                  UNUSED double hit_rate,
+static void test_rpt_fcn(H5_ATTR_UNUSED H5C_t * cache_ptr,
+                  H5_ATTR_UNUSED int32_t version,
+                  H5_ATTR_UNUSED double hit_rate,
                   enum H5C_resize_status status,
-                  UNUSED size_t old_max_cache_size,
-                  UNUSED size_t new_max_cache_size,
-                  UNUSED size_t old_min_clean_size,
-                  UNUSED size_t new_min_clean_size)
+                  H5_ATTR_UNUSED size_t old_max_cache_size,
+                  H5_ATTR_UNUSED size_t new_max_cache_size,
+                  H5_ATTR_UNUSED size_t old_min_clean_size,
+                  H5_ATTR_UNUSED size_t new_min_clean_size)
 {
     rpt_fcn_called = TRUE;
     rpt_status = status;
diff --git a/test/cache_common.c b/test/cache_common.c
index 4077d29..5fe68db 100644
--- a/test/cache_common.c
+++ b/test/cache_common.c
@@ -330,7 +330,7 @@ const H5C_class_t types[NUMBER_OF_ENTRY_TYPES] =
 static herr_t clear(H5F_t * f, void * thing, hbool_t dest);
 static herr_t destroy(H5F_t * f, void * thing);
 static herr_t flush(H5F_t *f, hid_t dxpl_id, hbool_t dest,
-                    haddr_t addr, void *thing, unsigned UNUSED * flags_ptr);
+                    haddr_t addr, void *thing, unsigned H5_ATTR_UNUSED * flags_ptr);
 static void * load(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *udata);
 static herr_t size(H5F_t * f, void * thing, size_t * size_ptr);
 static void execute_flush_op(H5F_t *file_ptr, struct test_entry_t *entry_ptr,
@@ -486,9 +486,9 @@ type_and_index_to_addr(int32_t type,
  */
 
 herr_t
-check_write_permitted(const H5F_t UNUSED * f,
-                      hid_t UNUSED dxpl_id,
-                      hbool_t * write_permitted_ptr)
+check_write_permitted(const H5F_t H5_ATTR_UNUSED *f,
+                      hid_t H5_ATTR_UNUSED dxpl_id,
+                      hbool_t *write_permitted_ptr)
 {
 
     HDassert( write_permitted_ptr );
@@ -639,7 +639,7 @@ variable_clear(H5F_t * f, void *  thing, hbool_t dest)
  */
 
 herr_t
-destroy(H5F_t UNUSED * f,
+destroy(H5F_t H5_ATTR_UNUSED * f,
         void *         thing)
 {
     int i;
@@ -796,11 +796,11 @@ variable_dest(H5F_t * f, void *  thing)
 
 herr_t
 flush(H5F_t *f,
-      hid_t UNUSED dxpl_id,
+      hid_t H5_ATTR_UNUSED dxpl_id,
       hbool_t dest,
       haddr_t
 #ifdef NDEBUG
-          UNUSED
+          H5_ATTR_UNUSED
 #endif /* NDEBUG */
           addr,
       void *thing,
@@ -966,10 +966,10 @@ variable_flush(H5F_t *f, hid_t dxpl_id, hbool_t dest, haddr_t addr,
  */
 
 void *
-load(H5F_t UNUSED *f,
-     hid_t UNUSED dxpl_id,
+load(H5F_t H5_ATTR_UNUSED *f,
+     hid_t H5_ATTR_UNUSED dxpl_id,
      haddr_t addr,
-     void UNUSED *udata)
+     void H5_ATTR_UNUSED *udata)
 {
     int32_t type;
     int32_t idx;
@@ -1090,7 +1090,7 @@ variable_load(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *udata)
  */
 
 herr_t
-size(H5F_t UNUSED *  f,
+size(H5F_t H5_ATTR_UNUSED *  f,
      void *   thing,
      size_t * size_ptr)
 {
diff --git a/test/dsets.c b/test/dsets.c
index cc1fa03..e523680 100644
--- a/test/dsets.c
+++ b/test/dsets.c
@@ -1229,7 +1229,7 @@ const H5Z_class2_t H5Z_BOGUS[1] = {{
  *-------------------------------------------------------------------------
  */
 static htri_t
-can_apply_bogus(hid_t UNUSED dcpl_id, hid_t type_id, hid_t UNUSED space_id)
+can_apply_bogus(hid_t H5_ATTR_UNUSED dcpl_id, hid_t type_id, hid_t H5_ATTR_UNUSED space_id)
 {
     if(H5Tequal(type_id,H5T_NATIVE_DOUBLE))
         return 0;
@@ -1255,9 +1255,9 @@ can_apply_bogus(hid_t UNUSED dcpl_id, hid_t type_id, hid_t UNUSED space_id)
  *-------------------------------------------------------------------------
  */
 static size_t
-filter_bogus(unsigned int UNUSED flags, size_t UNUSED cd_nelmts,
-      const unsigned int UNUSED *cd_values, size_t nbytes,
-      size_t UNUSED *buf_size, void UNUSED **buf)
+filter_bogus(unsigned int H5_ATTR_UNUSED flags, size_t H5_ATTR_UNUSED cd_nelmts,
+      const unsigned int H5_ATTR_UNUSED *cd_values, size_t nbytes,
+      size_t H5_ATTR_UNUSED *buf_size, void H5_ATTR_UNUSED **buf)
 {
     return nbytes;
 }
@@ -1279,7 +1279,7 @@ filter_bogus(unsigned int UNUSED flags, size_t UNUSED cd_nelmts,
  *-------------------------------------------------------------------------
  */
 static herr_t
-set_local_bogus2(hid_t dcpl_id, hid_t type_id, hid_t UNUSED space_id)
+set_local_bogus2(hid_t dcpl_id, hid_t type_id, hid_t H5_ATTR_UNUSED space_id)
 {
     unsigned add_on=0;      /* Value to add to data going through */
     unsigned flags;         /* Filter flags */
@@ -1386,9 +1386,9 @@ filter_bogus2(unsigned int flags, size_t cd_nelmts,
  *-------------------------------------------------------------------------
  */
 static size_t
-filter_bogus3(unsigned int UNUSED flags, size_t UNUSED cd_nelmts,
-      const unsigned int UNUSED *cd_values, size_t UNUSED nbytes,
-      size_t UNUSED *buf_size, void UNUSED **buf)
+filter_bogus3(unsigned int H5_ATTR_UNUSED flags, size_t H5_ATTR_UNUSED cd_nelmts,
+      const unsigned int H5_ATTR_UNUSED *cd_values, size_t H5_ATTR_UNUSED nbytes,
+      size_t H5_ATTR_UNUSED *buf_size, void H5_ATTR_UNUSED **buf)
 {
     return 0;
 }
@@ -1482,8 +1482,8 @@ error:
  *-------------------------------------------------------------------------
  */
 static H5Z_cb_return_t
-filter_cb_cont(H5Z_filter_t filter, void UNUSED *buf, size_t UNUSED buf_size,
-           void UNUSED *op_data)
+filter_cb_cont(H5Z_filter_t filter, void H5_ATTR_UNUSED *buf, size_t H5_ATTR_UNUSED buf_size,
+           void H5_ATTR_UNUSED *op_data)
 {
     if(H5Z_FILTER_FLETCHER32==filter)
        return H5Z_CB_CONT;
@@ -1505,8 +1505,8 @@ filter_cb_cont(H5Z_filter_t filter, void UNUSED *buf, size_t UNUSED buf_size,
  *-------------------------------------------------------------------------
  */
 static H5Z_cb_return_t
-filter_cb_fail(H5Z_filter_t filter, void UNUSED *buf, size_t UNUSED buf_size,
-           void UNUSED *op_data)
+filter_cb_fail(H5Z_filter_t filter, void H5_ATTR_UNUSED *buf, size_t H5_ATTR_UNUSED buf_size,
+           void H5_ATTR_UNUSED *op_data)
 {
     if(H5Z_FILTER_FLETCHER32==filter)
        return H5Z_CB_FAIL;
@@ -2074,7 +2074,7 @@ error:
 static herr_t
 test_filters(hid_t file, hid_t
 #ifndef H5_HAVE_FILTER_SZIP
-UNUSED
+H5_ATTR_UNUSED
 #endif /* H5_HAVE_FILTER_SZIP */
     fapl)
 {
@@ -5413,7 +5413,7 @@ error:
 static herr_t
 test_can_apply_szip(hid_t
 #ifndef H5_HAVE_FILTER_SZIP
-UNUSED
+H5_ATTR_UNUSED
 #endif /* H5_HAVE_FILTER_SZIP */
 file)
 {
@@ -6773,13 +6773,13 @@ error:
 #ifndef H5_NO_DEPRECATED_SYMBOLS
 /* Empty can_apply and set_local callbacks */
 static htri_t
-can_apply_deprec(hid_t UNUSED dcpl_id, hid_t UNUSED type_id, hid_t UNUSED space_id)
+can_apply_deprec(hid_t H5_ATTR_UNUSED dcpl_id, hid_t H5_ATTR_UNUSED type_id, hid_t H5_ATTR_UNUSED space_id)
 {
     return 1;
 }
 
 static herr_t
-set_local_deprec(hid_t UNUSED dcpl_id, hid_t UNUSED type_id, hid_t UNUSED space_id)
+set_local_deprec(hid_t H5_ATTR_UNUSED dcpl_id, hid_t H5_ATTR_UNUSED type_id, hid_t H5_ATTR_UNUSED space_id)
 {
     return(SUCCEED);
 }
@@ -7502,9 +7502,9 @@ static size_t filter_expand_factor_g = 0;
  *-------------------------------------------------------------------------
  */
 static size_t
-filter_expand(unsigned int flags, size_t UNUSED cd_nelmts,
-      const unsigned int UNUSED *cd_values, size_t nbytes,
-      size_t *buf_size, void UNUSED **buf)
+filter_expand(unsigned int flags, size_t H5_ATTR_UNUSED cd_nelmts,
+      const unsigned int H5_ATTR_UNUSED *cd_values, size_t nbytes,
+      size_t *buf_size, void H5_ATTR_UNUSED **buf)
 {
     size_t         ret_value = 0;
 
@@ -8960,8 +8960,8 @@ error:
  *-------------------------------------------------------------------------
  */
 static herr_t
-gather_error_cb_fail(const void UNUSED *dst_buf,
-    size_t UNUSED dst_buf_bytes_used, void UNUSED *op_data)
+gather_error_cb_fail(const void H5_ATTR_UNUSED *dst_buf,
+    size_t H5_ATTR_UNUSED dst_buf_bytes_used, void H5_ATTR_UNUSED *op_data)
 {
     return FAIL;
 }
diff --git a/test/dt_arith.c b/test/dt_arith.c
index 8823e24..75093b0 100644
--- a/test/dt_arith.c
+++ b/test/dt_arith.c
@@ -415,7 +415,7 @@ static int my_isinf(int endian, unsigned char *val, size_t size,
  *-------------------------------------------------------------------------
  */
 static void
-fpe_handler(int UNUSED signo)
+fpe_handler(int H5_ATTR_UNUSED signo)
 {
     SKIPPED();
     HDputs("    Test skipped due to SIGFPE.");
@@ -488,7 +488,7 @@ reset_hdf5(void)
  *-------------------------------------------------------------------------
  */
 static H5T_conv_ret_t
-except_func(H5T_conv_except_t except_type, hid_t UNUSED src_id, hid_t UNUSED dst_id, void UNUSED *src_buf,
+except_func(H5T_conv_except_t except_type, hid_t H5_ATTR_UNUSED src_id, hid_t H5_ATTR_UNUSED dst_id, void H5_ATTR_UNUSED *src_buf,
 		 void *dst_buf, void *user_data)
 {
     H5T_conv_ret_t      ret = H5T_CONV_HANDLED;
@@ -683,7 +683,7 @@ test_hard_query(void)
  *-------------------------------------------------------------------------
  */
 static H5T_conv_ret_t
-expt_handle(H5T_conv_except_t except_type, hid_t UNUSED src_id, hid_t UNUSED dst_id, void UNUSED *src_buf,
+expt_handle(H5T_conv_except_t except_type, hid_t H5_ATTR_UNUSED src_id, hid_t H5_ATTR_UNUSED dst_id, void H5_ATTR_UNUSED *src_buf,
 		 void *dst_buf, void *user_data)
 {
     signed char         fill_value1 = 7;
diff --git a/test/dtypes.c b/test/dtypes.c
index 9a78ca9..0e9edad 100644
--- a/test/dtypes.c
+++ b/test/dtypes.c
@@ -4814,10 +4814,10 @@ test_bitfield_funcs(void)
  *-------------------------------------------------------------------------
  */
 static herr_t
-convert_opaque(hid_t UNUSED st, hid_t UNUSED dt, H5T_cdata_t *cdata,
-	       size_t UNUSED nelmts, size_t UNUSED buf_stride,
-               size_t UNUSED bkg_stride, void UNUSED *_buf,
-	       void UNUSED *bkg, hid_t UNUSED dset_xfer_plid)
+convert_opaque(hid_t H5_ATTR_UNUSED st, hid_t H5_ATTR_UNUSED dt, H5T_cdata_t *cdata,
+	       size_t H5_ATTR_UNUSED nelmts, size_t H5_ATTR_UNUSED buf_stride,
+               size_t H5_ATTR_UNUSED bkg_stride, void H5_ATTR_UNUSED *_buf,
+	       void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dset_xfer_plid)
 {
     if (H5T_CONV_CONV==cdata->command) num_opaque_conversions_g++;
     return 0;
@@ -5872,8 +5872,8 @@ typedef struct {
 } except_info_t;
 
 static H5T_conv_ret_t
-conv_except(H5T_conv_except_t except_type, hid_t UNUSED src_id, hid_t UNUSED dst_id,
-    void UNUSED *src_buf, void UNUSED *dst_buf, void *_user_data)
+conv_except(H5T_conv_except_t except_type, hid_t H5_ATTR_UNUSED src_id, hid_t H5_ATTR_UNUSED dst_id,
+    void H5_ATTR_UNUSED *src_buf, void H5_ATTR_UNUSED *dst_buf, void *_user_data)
 {
     except_info_t *user_data = (except_info_t *)_user_data;
 
diff --git a/test/error_test.c b/test/error_test.c
index 0d945d2..e712d86 100644
--- a/test/error_test.c
+++ b/test/error_test.c
@@ -314,7 +314,7 @@ error:
  *-------------------------------------------------------------------------
  */
 static herr_t
-long_desc_cb(unsigned UNUSED n, const H5E_error2_t *err_desc, void *client_data)
+long_desc_cb(unsigned H5_ATTR_UNUSED n, const H5E_error2_t *err_desc, void *client_data)
 {
     char *real_desc  = (char *)client_data;
 
diff --git a/test/fheap.c b/test/fheap.c
index 1a2ac12..3b1f5b1 100644
--- a/test/fheap.c
+++ b/test/fheap.c
@@ -1813,7 +1813,7 @@ error:
  *-------------------------------------------------------------------------
  */
 static int
-test_create(hid_t fapl, H5HF_create_t *cparam, fheap_test_param_t UNUSED *tparam)
+test_create(hid_t fapl, H5HF_create_t *cparam, fheap_test_param_t H5_ATTR_UNUSED *tparam)
 {
     hid_t	file = -1;              /* File ID */
     char	filename[FHEAP_FILENAME_LEN];         /* Filename to use */
@@ -1927,7 +1927,7 @@ error:
  *-------------------------------------------------------------------------
  */
 static int
-test_reopen(hid_t fapl, H5HF_create_t *cparam, fheap_test_param_t UNUSED *tparam)
+test_reopen(hid_t fapl, H5HF_create_t *cparam, fheap_test_param_t H5_ATTR_UNUSED *tparam)
 {
     hid_t	file = -1;              /* File ID */
     char	filename[FHEAP_FILENAME_LEN];         /* Filename to use */
@@ -2023,7 +2023,7 @@ error:
  *-------------------------------------------------------------------------
  */
 static int
-test_open_twice(hid_t fapl, H5HF_create_t *cparam, fheap_test_param_t UNUSED *tparam)
+test_open_twice(hid_t fapl, H5HF_create_t *cparam, fheap_test_param_t H5_ATTR_UNUSED *tparam)
 {
     hid_t	file = -1;              /* File ID */
     hid_t	file2 = -1;             /* File ID */
@@ -2157,7 +2157,7 @@ error:
  *-------------------------------------------------------------------------
  */
 static int
-test_delete_open(hid_t fapl, H5HF_create_t *cparam, fheap_test_param_t UNUSED *tparam)
+test_delete_open(hid_t fapl, H5HF_create_t *cparam, fheap_test_param_t H5_ATTR_UNUSED *tparam)
 {
     hid_t	file = -1;              /* File ID */
     char	filename[FHEAP_FILENAME_LEN];         /* Filename to use */
@@ -15537,9 +15537,9 @@ error:
 /* Custom filter used to verify that the filters are actually called and do not
  * just silently fail */
 static hbool_t test_write_filter_called;
-static size_t test_write_filter(unsigned int UNUSED flags, size_t UNUSED cd_nelmts,
-    const unsigned int UNUSED cd_values[], size_t nbytes, size_t UNUSED *buf_size,
-    void UNUSED **buf)
+static size_t test_write_filter(unsigned int H5_ATTR_UNUSED flags, size_t H5_ATTR_UNUSED cd_nelmts,
+    const unsigned int H5_ATTR_UNUSED cd_values[], size_t nbytes, size_t H5_ATTR_UNUSED *buf_size,
+    void H5_ATTR_UNUSED **buf)
 {
     test_write_filter_called = TRUE;
 
diff --git a/test/fillval.c b/test/fillval.c
index aa8831e..1c90963 100644
--- a/test/fillval.c
+++ b/test/fillval.c
@@ -1301,7 +1301,7 @@ error:
  *-------------------------------------------------------------------------
  */
 static int
-test_extend_release_integer(void UNUSED *_elmt)
+test_extend_release_integer(void H5_ATTR_UNUSED *_elmt)
 {
     return 0;
 } /* end test_extend_release_integer() */
diff --git a/test/filter_fail.c b/test/filter_fail.c
index 3dbb564..0b92abb 100644
--- a/test/filter_fail.c
+++ b/test/filter_fail.c
@@ -65,8 +65,8 @@ const H5Z_class2_t H5Z_FAIL_TEST[1] = {{
  *-------------------------------------------------------------------------
  */
 static size_t
-filter_fail(unsigned int flags, size_t UNUSED cd_nelmts,
-      const unsigned int UNUSED *cd_values, size_t nbytes,
+filter_fail(unsigned int flags, size_t H5_ATTR_UNUSED cd_nelmts,
+      const unsigned int H5_ATTR_UNUSED *cd_values, size_t nbytes,
       size_t *buf_size, void **buf)
 {
     int   *dst = (int*)(*buf);
diff --git a/test/freespace.c b/test/freespace.c
index 9ab0d75..1338ae7 100644
--- a/test/freespace.c
+++ b/test/freespace.c
@@ -85,8 +85,8 @@ typedef struct TEST_free_section_t {
 
 static herr_t TEST_sect_init_cls(H5FS_section_class_t *, void *);
 static herr_t TEST_sect_free(H5FS_section_info_t *_sect);
-static herr_t TEST_sect_can_merge(const H5FS_section_info_t *, const H5FS_section_info_t *, void UNUSED *);
-static herr_t TEST_sect_merging(H5FS_section_info_t *, H5FS_section_info_t *, void UNUSED *);
+static herr_t TEST_sect_can_merge(const H5FS_section_info_t *, const H5FS_section_info_t *, void H5_ATTR_UNUSED *);
+static herr_t TEST_sect_merging(H5FS_section_info_t *, H5FS_section_info_t *, void H5_ATTR_UNUSED *);
 static herr_t TEST_sect_can_shrink(const H5FS_section_info_t *, void *);
 static herr_t TEST_sect_shrinking(H5FS_section_info_t **, void *);
 
@@ -223,7 +223,7 @@ TEST_sect_init_cls(H5FS_section_class_t *cls, void *_udata)
  */
 static herr_t
 TEST_sect_can_merge(const H5FS_section_info_t *_sect1,
-    const H5FS_section_info_t *_sect2, void UNUSED *_udata)
+    const H5FS_section_info_t *_sect2, void H5_ATTR_UNUSED *_udata)
 {
     const TEST_free_section_t *sect1 = (const TEST_free_section_t *)_sect1;
     const TEST_free_section_t *sect2 = (const TEST_free_section_t *)_sect2;
@@ -246,7 +246,7 @@ TEST_sect_can_merge(const H5FS_section_info_t *_sect1,
  */
 static herr_t
 TEST_sect_merging(H5FS_section_info_t *_sect1, H5FS_section_info_t *_sect2,
-    void UNUSED *_udata)
+    void H5_ATTR_UNUSED *_udata)
 {
     TEST_free_section_t *sect1 = (TEST_free_section_t *)_sect1;
     TEST_free_section_t *sect2 = (TEST_free_section_t *)_sect2;
diff --git a/test/gen_filters.c b/test/gen_filters.c
index b44339d..f506602 100644
--- a/test/gen_filters.c
+++ b/test/gen_filters.c
@@ -123,9 +123,9 @@ const H5Z_class2_t H5Z_BOGUS[1] = {{
  *-------------------------------------------------------------------------
  */
 static size_t
-filter_bogus(unsigned int UNUSED flags, size_t UNUSED cd_nelmts,
-      const unsigned int UNUSED *cd_values, size_t nbytes,
-      size_t UNUSED *buf_size, void UNUSED **buf)
+filter_bogus(unsigned int H5_ATTR_UNUSED flags, size_t H5_ATTR_UNUSED cd_nelmts,
+      const unsigned int H5_ATTR_UNUSED *cd_values, size_t nbytes,
+      size_t H5_ATTR_UNUSED *buf_size, void H5_ATTR_UNUSED **buf)
 {
     return nbytes;
 }
diff --git a/test/h5test.c b/test/h5test.c
index 21aacb5..1c8efeb 100644
--- a/test/h5test.c
+++ b/test/h5test.c
@@ -113,7 +113,7 @@ static char * h5_fixname_real(const char *base_name, hid_t fapl, const char *suf
  *-------------------------------------------------------------------------
  */
 static herr_t
-h5_errors(hid_t estack, void UNUSED *client_data)
+h5_errors(hid_t estack, void H5_ATTR_UNUSED *client_data)
 {
     H5_FAILED();
     H5Eprint2(estack, stdout);
@@ -1222,8 +1222,8 @@ h5_make_local_copy(const char *origfilename, const char *local_copy_name)
  *-------------------------------------------------------------------------
  */
 static herr_t
-h5_verify_cached_stabs_cb(hid_t oid, const char UNUSED *name,
-    const H5O_info_t *oinfo, void UNUSED *udata)
+h5_verify_cached_stabs_cb(hid_t oid, const char H5_ATTR_UNUSED *name,
+    const H5O_info_t *oinfo, void H5_ATTR_UNUSED *udata)
 {
     if(oinfo->type == H5O_TYPE_GROUP)
         return(H5G__verify_cached_stabs_test(oid));
diff --git a/test/links.c b/test/links.c
index d8495ba..177730f 100644
--- a/test/links.c
+++ b/test/links.c
@@ -7337,8 +7337,8 @@ error:
 /* Callback functions for UD hard links. */
 /* UD_hard_create increments the object's reference count */
 static herr_t
-UD_hard_create(const char UNUSED * link_name, hid_t loc_group, const void *udata,
-    size_t udata_size, hid_t UNUSED lcpl_id)
+UD_hard_create(const char H5_ATTR_UNUSED * link_name, hid_t loc_group, const void *udata,
+    size_t udata_size, hid_t H5_ATTR_UNUSED lcpl_id)
 {
     haddr_t addr;
     hid_t target_obj = -1;
@@ -7406,8 +7406,8 @@ done:
 
 /* Traverse a hard link by opening the object */
 static hid_t
-UD_hard_traverse(const char UNUSED *link_name, hid_t cur_group,
-    const void *udata, size_t udata_size, hid_t UNUSED lapl_id)
+UD_hard_traverse(const char H5_ATTR_UNUSED *link_name, hid_t cur_group,
+    const void *udata, size_t udata_size, hid_t H5_ATTR_UNUSED lapl_id)
 {
     haddr_t addr;
     hid_t ret_value = -1;
@@ -7424,7 +7424,7 @@ UD_hard_traverse(const char UNUSED *link_name, hid_t cur_group,
 
 /* UD_hard_delete decrements the object's reference count */
 static herr_t
-UD_hard_delete(const char UNUSED * link_name, hid_t file, const void *udata,
+UD_hard_delete(const char H5_ATTR_UNUSED * link_name, hid_t file, const void *udata,
     size_t udata_size)
 {
     haddr_t addr;
@@ -7642,8 +7642,8 @@ ud_hard_links(hid_t fapl)
  * in the current group named REREG_TARGET_NAME
  */
 static hid_t
-UD_rereg_traverse(const char UNUSED * link_name, hid_t cur_group,
-    const void UNUSED *udata, size_t UNUSED udata_size, hid_t lapl_id)
+UD_rereg_traverse(const char H5_ATTR_UNUSED * link_name, hid_t cur_group,
+    const void H5_ATTR_UNUSED *udata, size_t H5_ATTR_UNUSED udata_size, hid_t lapl_id)
 {
     hid_t ret_value;
 
@@ -8081,8 +8081,8 @@ error:
  *-------------------------------------------------------------------------
  */
 static hid_t
-UD_plist_traverse(const char UNUSED * link_name, hid_t cur_group,
-    const void UNUSED *udata, size_t udata_size, hid_t lapl_id)
+UD_plist_traverse(const char H5_ATTR_UNUSED * link_name, hid_t cur_group,
+    const void H5_ATTR_UNUSED *udata, size_t udata_size, hid_t lapl_id)
 {
     char target[NAME_BUF_SIZE];
     hid_t ret_value;
@@ -8220,8 +8220,8 @@ lapl_udata(hid_t fapl, hbool_t new_format)
  *-------------------------------------------------------------------------
  */
 static herr_t
-UD_cbsucc_create(const char UNUSED * link_name, hid_t UNUSED loc_group,
-    const void *udata, size_t udata_size, hid_t UNUSED lcpl_id)
+UD_cbsucc_create(const char H5_ATTR_UNUSED * link_name, hid_t H5_ATTR_UNUSED loc_group,
+    const void *udata, size_t udata_size, hid_t H5_ATTR_UNUSED lcpl_id)
 {
     /* Check to make sure that this "soft link" has a target */
     if(udata_size < 1 || !udata)
@@ -8231,8 +8231,8 @@ UD_cbsucc_create(const char UNUSED * link_name, hid_t UNUSED loc_group,
 } /* end UD_cbsucc_create() */
 
 static hid_t
-UD_cbsucc_traverse(const char UNUSED *link_name, hid_t cur_group,
-    const void *udata, size_t UNUSED udata_size, hid_t lapl_id)
+UD_cbsucc_traverse(const char H5_ATTR_UNUSED *link_name, hid_t cur_group,
+    const void *udata, size_t H5_ATTR_UNUSED udata_size, hid_t lapl_id)
 {
     const char *target = (const char *)udata;
     hid_t ret_value;
@@ -8249,8 +8249,8 @@ error:
 
 /* Failure callback for when the link is moved or renamed */
 static herr_t
-UD_cbfail_move(const char UNUSED *new_name, hid_t UNUSED new_loc,
-    const void UNUSED *udata, size_t UNUSED udata_size)
+UD_cbfail_move(const char H5_ATTR_UNUSED *new_name, hid_t H5_ATTR_UNUSED new_loc,
+    const void H5_ATTR_UNUSED *udata, size_t H5_ATTR_UNUSED udata_size)
 {
     /* This traversal function will always fail. */
     return -1;
@@ -8258,8 +8258,8 @@ UD_cbfail_move(const char UNUSED *new_name, hid_t UNUSED new_loc,
 
 /* SuccessCallback for when the link is moved or renamed */
 static herr_t
-UD_cbsucc_move(const char UNUSED *new_name, hid_t UNUSED new_loc,
-    const void UNUSED *udata, size_t UNUSED udata_size)
+UD_cbsucc_move(const char H5_ATTR_UNUSED *new_name, hid_t H5_ATTR_UNUSED new_loc,
+    const void H5_ATTR_UNUSED *udata, size_t H5_ATTR_UNUSED udata_size)
 {
     /* This traversal function will always succeed. */
     return 0;
@@ -8267,8 +8267,8 @@ UD_cbsucc_move(const char UNUSED *new_name, hid_t UNUSED new_loc,
 
 /* Callback for when the link is deleted.  Also called during move */
 static herr_t
-UD_cbsucc_delete(const char UNUSED *link_name, hid_t UNUSED file,
-    const void UNUSED *udata, size_t UNUSED udata_size)
+UD_cbsucc_delete(const char H5_ATTR_UNUSED *link_name, hid_t H5_ATTR_UNUSED file,
+    const void H5_ATTR_UNUSED *udata, size_t H5_ATTR_UNUSED udata_size)
 {
     /* This callback will always succeed */
     return 0;
@@ -8276,8 +8276,8 @@ UD_cbsucc_delete(const char UNUSED *link_name, hid_t UNUSED file,
 
 /* Callback for when the link is deleted.  Also called during move */
 static herr_t
-UD_cbfail_delete(const char UNUSED *link_name, hid_t UNUSED file,
-    const void UNUSED *udata, size_t UNUSED udata_size)
+UD_cbfail_delete(const char H5_ATTR_UNUSED *link_name, hid_t H5_ATTR_UNUSED file,
+    const void H5_ATTR_UNUSED *udata, size_t H5_ATTR_UNUSED udata_size)
 {
     /* This traversal function will always fail. */
     /* Note: un-deletable links are in general a very bad idea! */
@@ -8286,8 +8286,8 @@ UD_cbfail_delete(const char UNUSED *link_name, hid_t UNUSED file,
 
 /* Callback for when the link is queried */
 static ssize_t
-UD_cbfail_query(const char UNUSED *link_name, const void UNUSED *udata,
-    size_t UNUSED udata_size, void UNUSED *buf, size_t UNUSED buf_size)
+UD_cbfail_query(const char H5_ATTR_UNUSED *link_name, const void H5_ATTR_UNUSED *udata,
+    size_t H5_ATTR_UNUSED udata_size, void H5_ATTR_UNUSED *buf, size_t H5_ATTR_UNUSED buf_size)
 {
     /* This traversal function will always fail. */
     return -1;
@@ -8295,8 +8295,8 @@ UD_cbfail_query(const char UNUSED *link_name, const void UNUSED *udata,
 
 /* Callback for when the link is queried */
 static ssize_t
-UD_cbfail_on_write_query(const char UNUSED *link_name, const void UNUSED *udata,
-    size_t UNUSED udata_size, void *buf, size_t UNUSED buf_size)
+UD_cbfail_on_write_query(const char H5_ATTR_UNUSED *link_name, const void H5_ATTR_UNUSED *udata,
+    size_t H5_ATTR_UNUSED udata_size, void *buf, size_t H5_ATTR_UNUSED buf_size)
 {
     /* This traversal function will return a buffer size,
      * but will fail when a buffer is passed in ("writing to the buffer"
@@ -8311,8 +8311,8 @@ UD_cbfail_on_write_query(const char UNUSED *link_name, const void UNUSED *udata,
 
 /* Callback for when the link is queried */
 static ssize_t
-UD_cbsucc_query(const char UNUSED *link_name, const void UNUSED *udata,
-    size_t UNUSED udata_size, void *buf, size_t buf_size)
+UD_cbsucc_query(const char H5_ATTR_UNUSED *link_name, const void H5_ATTR_UNUSED *udata,
+    size_t H5_ATTR_UNUSED udata_size, void *buf, size_t buf_size)
 {
     /* This traversal function will return a buffer size,
      * but will fail when a buffer is passed in ("writing to the buffer"
@@ -9033,7 +9033,7 @@ error:
  *-------------------------------------------------------------------------
  */
 static int
-visit_link_cb(hid_t UNUSED group_id, const char *name, const H5L_info_t *linfo,
+visit_link_cb(hid_t H5_ATTR_UNUSED group_id, const char *name, const H5L_info_t *linfo,
     void *_op_data)
 {
     lvisit_ud_t *op_data = (lvisit_ud_t *)_op_data;
@@ -9211,7 +9211,7 @@ error:
  *-------------------------------------------------------------------------
  */
 static int
-visit_obj_cb(hid_t UNUSED group_id, const char *name, const H5O_info_t *oinfo,
+visit_obj_cb(hid_t H5_ATTR_UNUSED group_id, const char *name, const H5O_info_t *oinfo,
     void *_op_data)
 {
     ovisit_ud_t *op_data = (ovisit_ud_t *)_op_data;
@@ -9389,7 +9389,7 @@ error:
  *-------------------------------------------------------------------------
  */
 static int
-visit_obj_stop_cb(hid_t UNUSED group_id, const char UNUSED *name, const H5O_info_t UNUSED *oinfo,
+visit_obj_stop_cb(hid_t H5_ATTR_UNUSED group_id, const char H5_ATTR_UNUSED *name, const H5O_info_t H5_ATTR_UNUSED *oinfo,
     void *_op_data)
 {
     unsigned *op_data = (unsigned *)_op_data;
@@ -9515,8 +9515,8 @@ static herr_t link_filter_set_local(hid_t dcpl_id, hid_t type_id, hid_t space_id
 } /* end link_filter_set_local */
 
 static size_t link_filter_filter(unsigned int flags, size_t cd_nelmts,
-    const unsigned int cd_values[], size_t nbytes, size_t UNUSED *buf_size,
-    void UNUSED **buf)
+    const unsigned int cd_values[], size_t nbytes, size_t H5_ATTR_UNUSED *buf_size,
+    void H5_ATTR_UNUSED **buf)
 {
     if(flags & H5Z_FLAG_OPTIONAL || cd_nelmts != 1 || cd_values[0] != 2112)
         return 0;
@@ -12016,8 +12016,8 @@ group_iterate_cb(hid_t group_id, const char *link_name, void *_op_data)
  *-------------------------------------------------------------------------
  */
 static int
-link_iterate_fail_cb(hid_t UNUSED group_id, const char UNUSED *link_name,
-    const H5L_info_t UNUSED *info, void UNUSED *_op_data)
+link_iterate_fail_cb(hid_t H5_ATTR_UNUSED group_id, const char H5_ATTR_UNUSED *link_name,
+    const H5L_info_t H5_ATTR_UNUSED *info, void H5_ATTR_UNUSED *_op_data)
 {
     return(H5_ITER_ERROR);
 } /* end link_iterate_fail_cb() */
diff --git a/test/objcopy.c b/test/objcopy.c
index d95a05e..cd0ddce 100644
--- a/test/objcopy.c
+++ b/test/objcopy.c
@@ -11457,7 +11457,7 @@ error:
  */
 static herr_t
 test_copy_iterate_cb(hid_t loc_id, const char *name,
-    const H5L_info_t UNUSED *link_info, void *op_data)
+    const H5L_info_t H5_ATTR_UNUSED *link_info, void *op_data)
 {
     hid_t dst_loc_id = *((hid_t *)op_data);
 
diff --git a/test/tattr.c b/test/tattr.c
index d533ef6..f29551a 100644
--- a/test/tattr.c
+++ b/test/tattr.c
@@ -1388,7 +1388,7 @@ test_attr_mult_read(hid_t fapl)
 **
 ****************************************************************/
 static herr_t
-attr_op1(hid_t UNUSED loc_id, const char *name, const H5A_info_t UNUSED *ainfo,
+attr_op1(hid_t H5_ATTR_UNUSED loc_id, const char *name, const H5A_info_t H5_ATTR_UNUSED *ainfo,
     void *op_data)
 {
     int *count = (int *)op_data;
@@ -6504,8 +6504,8 @@ attr_iterate1_cb(hid_t loc_id, const char *attr_name, void *_op_data)
  *-------------------------------------------------------------------------
  */
 static int
-attr_iterate2_fail_cb(hid_t UNUSED group_id, const char UNUSED *attr_name,
-    const H5A_info_t UNUSED *info, void UNUSED *_op_data)
+attr_iterate2_fail_cb(hid_t H5_ATTR_UNUSED group_id, const char H5_ATTR_UNUSED *attr_name,
+    const H5A_info_t H5_ATTR_UNUSED *info, void H5_ATTR_UNUSED *_op_data)
 {
     return(H5_ITER_ERROR);
 } /* end attr_iterate2_fail_cb() */
diff --git a/test/tcheck_version.c b/test/tcheck_version.c
index 91d98ef..a75d642 100644
--- a/test/tcheck_version.c
+++ b/test/tcheck_version.c
@@ -36,7 +36,7 @@
 /* prototypes */
 void showhelp(void);
 void parse(int ac, char **av);
-void abort_intercept (int UNUSED sig);
+void abort_intercept (int H5_ATTR_UNUSED sig);
 
 /* global variables */
 unsigned	major = H5_VERS_MAJOR;
@@ -105,7 +105,7 @@ parse(int ac, char **av)
  * This tries to eliminate those side effects.
  */
 void
-abort_intercept (int UNUSED sig)
+abort_intercept (int H5_ATTR_UNUSED sig)
 {
     HDexit(6);
 }
diff --git a/test/tgenprop.c b/test/tgenprop.c
index d147099..9e97bec 100644
--- a/test/tgenprop.c
+++ b/test/tgenprop.c
@@ -385,7 +385,7 @@ test_genprop_cls_crt_cb1(hid_t list_id, void *create_data)
 }
 
 static herr_t
-test_genprop_cls_cpy_cb1(hid_t new_list_id, hid_t UNUSED old_list_id, void *copy_data)
+test_genprop_cls_cpy_cb1(hid_t new_list_id, hid_t H5_ATTR_UNUSED old_list_id, void *copy_data)
 {
     struct {                /* Struct for iterations */
         int count;
@@ -993,7 +993,7 @@ prop_cb_info prop3_cb_info;     /* Callback statistics for property #3 */
 **
 ****************************************************************/
 static herr_t
-test_genprop_cls_cpy_cb2(hid_t new_list_id, hid_t UNUSED old_list_id, void *create_data)
+test_genprop_cls_cpy_cb2(hid_t new_list_id, hid_t H5_ATTR_UNUSED old_list_id, void *create_data)
 {
     struct {                /* Struct for iterations */
         int count;
diff --git a/test/tid.c b/test/tid.c
index cd8e64a..0b1389e 100644
--- a/test/tid.c
+++ b/test/tid.c
@@ -239,7 +239,7 @@ out:
 
 
 	/* A dummy search function for the next test */
-static int test_search_func(void UNUSED * ptr1, void UNUSED * ptr2) { return 0; }
+static int test_search_func(void H5_ATTR_UNUSED * ptr1, void H5_ATTR_UNUSED * ptr2) { return 0; }
 
 	/* Ensure that public functions cannot access "predefined" ID types */
 static int id_predefined_test(void )
diff --git a/test/titerate.c b/test/titerate.c
index 049e258..fff13f1 100644
--- a/test/titerate.c
+++ b/test/titerate.c
@@ -83,7 +83,7 @@ int iter_strcmp(const void *s1, const void *s2)
 **
 ****************************************************************/
 static herr_t
-liter_cb(hid_t UNUSED group, const char *name, const H5L_info_t UNUSED *link_info,
+liter_cb(hid_t H5_ATTR_UNUSED group, const char *name, const H5L_info_t H5_ATTR_UNUSED *link_info,
     void *op_data)
 {
     iter_info *info = (iter_info *)op_data;
@@ -344,7 +344,7 @@ test_iter_group(hid_t fapl, hbool_t new_format)
 **
 ****************************************************************/
 herr_t
-aiter_cb(hid_t UNUSED group, const char *name, const H5A_info_t UNUSED *ainfo,
+aiter_cb(hid_t H5_ATTR_UNUSED group, const char *name, const H5A_info_t H5_ATTR_UNUSED *ainfo,
     void *op_data)
 {
     iter_info *info = (iter_info *)op_data;
@@ -538,7 +538,7 @@ int iter_strcmp2(const void *s1, const void *s2)
 **
 ****************************************************************/
 static herr_t
-liter_cb2(hid_t loc_id, const char *name, const H5L_info_t UNUSED *link_info,
+liter_cb2(hid_t loc_id, const char *name, const H5L_info_t H5_ATTR_UNUSED *link_info,
     void *opdata)
 {
     const iter_info *test_info = (const iter_info *)opdata;
diff --git a/test/tmisc.c b/test/tmisc.c
index d606438..5b4bdb3 100644
--- a/test/tmisc.c
+++ b/test/tmisc.c
@@ -5181,8 +5181,8 @@ test_misc29(void)
 
 
 static int
-test_misc30_get_info_cb(hid_t loc_id, const char *name, const H5L_info_t UNUSED *info,
-    void UNUSED *op_data)
+test_misc30_get_info_cb(hid_t loc_id, const char *name, const H5L_info_t H5_ATTR_UNUSED *info,
+    void H5_ATTR_UNUSED *op_data)
 {
     H5O_info_t object_info;
 
diff --git a/test/trefer.c b/test/trefer.c
index 6223029..c99d7ee 100644
--- a/test/trefer.c
+++ b/test/trefer.c
@@ -1193,7 +1193,7 @@ test_reference_obj_deleted(void)
 **
 ****************************************************************/
 static herr_t
-test_deref_iter_op(hid_t UNUSED group, const char *name, const H5L_info_t UNUSED *info,
+test_deref_iter_op(hid_t H5_ATTR_UNUSED group, const char *name, const H5L_info_t H5_ATTR_UNUSED *info,
     void *op_data)
 {
     int *count = (int *)op_data;        /* Pointer to name counter */
diff --git a/test/tselect.c b/test/tselect.c
index 4f15694..704a2d3 100644
--- a/test/tselect.c
+++ b/test/tselect.c
@@ -180,7 +180,7 @@ static herr_t test_select_hyper_iter3(void *elem,hid_t type_id, unsigned ndim, c
 **
 ****************************************************************/
 static herr_t
-test_select_hyper_iter1(void *_elem, hid_t UNUSED type_id, unsigned UNUSED ndim, const hsize_t UNUSED *point, void *_operator_data)
+test_select_hyper_iter1(void *_elem, hid_t H5_ATTR_UNUSED type_id, unsigned H5_ATTR_UNUSED ndim, const hsize_t H5_ATTR_UNUSED *point, void *_operator_data)
 {
     uint8_t *tbuf=(uint8_t *)_elem,     /* temporary buffer pointer */
             **tbuf2=(uint8_t **)_operator_data; /* temporary buffer handle */
@@ -379,7 +379,7 @@ struct pnt_iter {
 **
 ****************************************************************/
 static herr_t
-test_select_point_iter1(void *_elem, hid_t UNUSED type_id, unsigned UNUSED ndim, const hsize_t UNUSED *point, void *_operator_data)
+test_select_point_iter1(void *_elem, hid_t H5_ATTR_UNUSED type_id, unsigned H5_ATTR_UNUSED ndim, const hsize_t H5_ATTR_UNUSED *point, void *_operator_data)
 {
     uint8_t *elem=(uint8_t *)_elem;  /* Pointer to the element to examine */
     uint8_t *tmp;                       /* temporary ptr to element in operator data */
@@ -656,7 +656,7 @@ test_select_point(hid_t xfer_plist)
 **
 ****************************************************************/
 static herr_t
-test_select_all_iter1(void *_elem, hid_t UNUSED type_id, unsigned UNUSED ndim, const hsize_t UNUSED *point, void *_operator_data)
+test_select_all_iter1(void *_elem, hid_t H5_ATTR_UNUSED type_id, unsigned H5_ATTR_UNUSED ndim, const hsize_t H5_ATTR_UNUSED *point, void *_operator_data)
 {
     uint8_t *tbuf=(uint8_t *)_elem,     /* temporary buffer pointer */
             **tbuf2=(uint8_t **)_operator_data; /* temporary buffer handle */
@@ -676,7 +676,7 @@ test_select_all_iter1(void *_elem, hid_t UNUSED type_id, unsigned UNUSED ndim, c
 **
 ****************************************************************/
 static herr_t
-test_select_none_iter1(void UNUSED *_elem, hid_t UNUSED type_id, unsigned UNUSED ndim, const hsize_t UNUSED *point, void UNUSED *_operator_data)
+test_select_none_iter1(void H5_ATTR_UNUSED *_elem, hid_t H5_ATTR_UNUSED type_id, unsigned H5_ATTR_UNUSED ndim, const hsize_t H5_ATTR_UNUSED *point, void H5_ATTR_UNUSED *_operator_data)
 {
     return(-1);
 }   /* end test_select_none_iter1() */
@@ -5810,7 +5810,7 @@ test_select_hyper_nota_2d(void)
 **
 ****************************************************************/
 static herr_t
-test_select_hyper_iter2(void *_elem, hid_t UNUSED type_id, unsigned ndim, const hsize_t *point, void *_operator_data)
+test_select_hyper_iter2(void *_elem, hid_t H5_ATTR_UNUSED type_id, unsigned ndim, const hsize_t *point, void *_operator_data)
 {
     int *tbuf=(int *)_elem,     /* temporary buffer pointer */
         **tbuf2=(int **)_operator_data; /* temporary buffer handle */
@@ -7002,7 +7002,7 @@ typedef struct {
 **
 ****************************************************************/
 static herr_t
-test_select_hyper_iter3(void *_elem, hid_t UNUSED type_id, unsigned ndim, const hsize_t *point, void *_operator_data)
+test_select_hyper_iter3(void *_elem, hid_t H5_ATTR_UNUSED type_id, unsigned ndim, const hsize_t *point, void *_operator_data)
 {
     unsigned *tbuf = (unsigned *)_elem;     /* temporary buffer pointer */
     fill_iter_info *iter_info = (fill_iter_info *)_operator_data; /* Get the pointer to the iterator information */
diff --git a/test/tskiplist.c b/test/tskiplist.c
index 8966e39..07e63fd 100644
--- a/test/tskiplist.c
+++ b/test/tskiplist.c
@@ -592,7 +592,7 @@ test_skiplist_string(void)
 } /* end test_skiplist_string() */
 
 static herr_t
-test_skiplist_iter(void *item, void UNUSED *key, void *op_data)
+test_skiplist_iter(void *item, void H5_ATTR_UNUSED *key, void *op_data)
 {
     size_t *up=(size_t *)op_data;
 
@@ -1070,7 +1070,7 @@ test_skiplist_add(void)
 } /* end test_skiplist_add() */
 
 static herr_t
-test_skiplist_destroy_free(void *item, void UNUSED *key, void *op_data)
+test_skiplist_destroy_free(void *item, void H5_ATTR_UNUSED *key, void *op_data)
 {
     unsigned *free_count=(unsigned *)op_data;
 
diff --git a/test/ttsafe_cancel.c b/test/ttsafe_cancel.c
index d8ed462..9bbec34 100644
--- a/test/ttsafe_cancel.c
+++ b/test/ttsafe_cancel.c
@@ -120,7 +120,7 @@ void tts_cancel(void)
     assert(ret==0);
 }
 
-void *tts_cancel_thread(void UNUSED *arg)
+void *tts_cancel_thread(void H5_ATTR_UNUSED *arg)
 {
     int datavalue;
     int buffer;
@@ -182,8 +182,8 @@ void *tts_cancel_thread(void UNUSED *arg)
     return NULL;
 }
 
-herr_t tts_cancel_callback(void *elem, hid_t UNUSED type_id, unsigned UNUSED ndim,
-			   const hsize_t UNUSED *point, void *operator_data)
+herr_t tts_cancel_callback(void *elem, hid_t H5_ATTR_UNUSED type_id, unsigned H5_ATTR_UNUSED ndim,
+			   const hsize_t H5_ATTR_UNUSED *point, void *operator_data)
 {
     int value = *(int *)elem;
     hid_t dataset = *(hid_t *)operator_data;
diff --git a/test/ttsafe_error.c b/test/ttsafe_error.c
index b81a7ad..e143263 100644
--- a/test/ttsafe_error.c
+++ b/test/ttsafe_error.c
@@ -154,7 +154,7 @@ void tts_error(void)
 }
 
 static
-void *tts_error_thread(void UNUSED *arg)
+void *tts_error_thread(void H5_ATTR_UNUSED *arg)
 {
     hid_t dataspace, datatype, dataset;
     hsize_t dimsf[1]; /* dataset dimensions */
@@ -199,7 +199,7 @@ void *tts_error_thread(void UNUSED *arg)
 }
 
 static
-herr_t error_callback(hid_t UNUSED estack_id, void *client_data)
+herr_t error_callback(hid_t H5_ATTR_UNUSED estack_id, void *client_data)
 {
     H5TS_mutex_lock_simple(&error_mutex);
     error_count++;
@@ -208,7 +208,7 @@ herr_t error_callback(hid_t UNUSED estack_id, void *client_data)
 }
 
 static
-herr_t walk_error_callback(unsigned n, const H5E_error2_t *err_desc, void UNUSED *client_data)
+herr_t walk_error_callback(unsigned n, const H5E_error2_t *err_desc, void H5_ATTR_UNUSED *client_data)
 {
     hid_t maj_num, min_num;
 
diff --git a/test/tunicode.c b/test/tunicode.c
index 2804fe6..6781fe8 100644
--- a/test/tunicode.c
+++ b/test/tunicode.c
@@ -119,7 +119,7 @@ void test_fl_string(hid_t fid, const char *string)
  * Borrows heavily from dtypes.c, but is more complicated because
  * the string is randomly generated.
  */
-void test_strpad(hid_t UNUSED fid, const char *string)
+void test_strpad(hid_t H5_ATTR_UNUSED fid, const char *string)
 {
     /* buf is used to hold the data that H5Tconvert operates on. */
     char     buf[LONG_BUF_SIZE];
@@ -650,7 +650,7 @@ void test_compound(hid_t fid, const char * string)
  * test_enum
  * Test that enumerated datatypes can have UTF-8 member names.
  */
-void test_enum(hid_t UNUSED fid, const char * string)
+void test_enum(hid_t H5_ATTR_UNUSED fid, const char * string)
 {
   /* Define an enumerated type */
   typedef enum {
@@ -699,7 +699,7 @@ void test_enum(hid_t UNUSED fid, const char * string)
  * test_opaque
  * Test comments on opaque datatypes
  */
-void test_opaque(hid_t UNUSED fid, const char * string)
+void test_opaque(hid_t H5_ATTR_UNUSED fid, const char * string)
 {
   hid_t type_id;
   char * read_buf;
diff --git a/test/unregister.c b/test/unregister.c
index 383958d..be40383 100644
--- a/test/unregister.c
+++ b/test/unregister.c
@@ -68,9 +68,9 @@ const H5Z_class2_t H5Z_DUMMY[1] = {{
  *-------------------------------------------------------------------------
  */
 static size_t
-filter_dummy(unsigned int UNUSED flags, size_t UNUSED cd_nelmts,
-      const unsigned int UNUSED *cd_values, size_t nbytes,
-      size_t UNUSED *buf_size, void UNUSED **buf)
+filter_dummy(unsigned int H5_ATTR_UNUSED flags, size_t H5_ATTR_UNUSED cd_nelmts,
+      const unsigned int H5_ATTR_UNUSED *cd_values, size_t nbytes,
+      size_t H5_ATTR_UNUSED *buf_size, void H5_ATTR_UNUSED **buf)
 {
     return nbytes;
 }