--- a/test/cache_common.h
+++ b/test/cache_common.h
@@ -702,5 +702,8 @@ void validate_mdc_config(hid_t file_id,
                          hbool_t compare_init,
                          int test_num);
 
+hbool_t resize_configs_are_equal(const H5C_auto_size_ctl_t *a,
+                                 const H5C_auto_size_ctl_t *b,
+                                 hbool_t compare_init);
 #endif /* _CACHE_COMMON_H */
 
--- a/testpar/t_span_tree.c
+++ b/testpar/t_span_tree.c
@@ -37,6 +37,9 @@
 #include "hdf5.h"
 #include "H5private.h"
 #include "testphdf5.h"
+#define H5S_PACKAGE
+#define H5S_TESTING
+#include "H5Spkg.h"
 
 
 static void coll_write_test(int chunk_factor);
--- a/configure.ac
+++ b/configure.ac
@@ -1504,6 +1504,9 @@ case "$host_cpu-$host_vendor-$host_os" in
     ## however, we do not do this since it breaks the big test on some 
     ## older platforms.
     AM_CPPFLAGS="-D_BSD_SOURCE $AM_CPPFLAGS"
+    
+    ## _GNU_SOURCE is needed for vasprintf
+    AM_CPPFLAGS="-D_GNU_SOURCE $AM_CPPFLAGS"
     ;;
 esac