Fix the build on OpenBSD (#488)

* cast pthread_t for printf
* don't use RTLD_NOLOAD
* tokudb fails without F_NOCACHE and O_DIRECT - ditto

sql/wsrep_mysqld.cc

@@ -1976,7 +1976,7 @@ static bool abort_replicated(THD *thd)
   bool ret_code= false;
   if (thd->wsrep_query_state== QUERY_COMMITTING)
   {
-    WSREP_DEBUG("aborting replicated trx: %lu", thd->real_id);
+    WSREP_DEBUG("aborting replicated trx: %llu", (ulonglong)(thd->real_id));
 
     (void)wsrep_abort_thd(thd, thd, TRUE);
     ret_code= true;

storage/connect/reldef.cpp

@@ -547,14 +547,12 @@ PTABDEF OEMDEF::GetXdef(PGLOBAL g)
   } // endif dladdr
 #endif // 0
 
-  // Is the library already loaded?
-  if (!Hdll && !(Hdll = dlopen(soname, RTLD_NOLOAD)))
-    // Load the desired shared library
-    if (!(Hdll = dlopen(soname, RTLD_LAZY))) {
-      error = dlerror();
-      sprintf(g->Message, MSG(SHARED_LIB_ERR), soname, SVP(error));
-      return NULL;
-      } // endif Hdll
+  // Load the desired shared library
+  if (!Hdll && !(Hdll = dlopen(soname, RTLD_LAZY))) {
+    error = dlerror();
+    sprintf(g->Message, MSG(SHARED_LIB_ERR), soname, SVP(error));
+    return NULL;
+    } // endif Hdll
 
   // The exported name is always in uppercase
   for (int i = 0; ; i++) {

storage/tokudb/CMakeLists.txt

@@ -4,11 +4,13 @@ IF(CMAKE_VERSION VERSION_LESS "2.8.9")
   MESSAGE(STATUS "CMake 2.8.9 or higher is required by TokuDB")
 ELSEIF(CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64" OR
        CMAKE_SYSTEM_PROCESSOR STREQUAL "amd64")
+# tokudb requires F_NOCACHE, O_DIRECT, and designated initializers
 CHECK_CXX_SOURCE_COMPILES(
 "
+#include <fcntl.h>
 struct a {int b; int c; };
 struct a d = { .b=1, .c=2 };
-int main() { return 0; }
+int main() { return F_NOCACHE + O_DIRECT; }
 " TOKUDB_OK)
 ENDIF()