Moved pthread spinlock check in with the rest of the pthread tests.

configure.in

@@ -277,25 +277,6 @@ if test x$enable_gcc_atomics = xyes; then
     fi
 fi
 
-# Check for pthread implementation
-AC_MSG_CHECKING(for pthread spinlock)
-have_pthread_spinlock=no
-
-AC_TRY_LINK([
-#include <pthread.h>
-],[
-pthread_spinlock_t a;
-pthread_spin_trylock(&a);
-pthread_spin_unlock(&a);
-],[
-have_pthread_spinlock=yes
-])
-AC_MSG_RESULT($have_pthread_spinlock)
-if test x$have_pthread_spinlock = xyes; then
-    AC_DEFINE(HAVE_PTHREAD_SPINLOCK, 1, [ ])
-fi
-
-
 # Standard C sources
 SOURCES="$SOURCES $srcdir/src/*.c"
 SOURCES="$SOURCES $srcdir/src/atomic/*.c"
@@ -1652,6 +1633,15 @@ AC_HELP_STRING([--enable-pthread-sem], [use pthread semaphores [[default=yes]]])
                 AC_MSG_RESULT($have_pthread_sem)
             fi
 
+            AC_MSG_CHECKING(for pthread_spin_trylock)
+            AC_TRY_LINK_FUNC(pthread_spin_trylock, [
+              has_pthread_spin_trylock=yes
+              AC_DEFINE(HAVE_PTHREAD_SPINLOCK, 1, [ ])
+            ],[
+              has_pthread_spin_trylock=no
+            ])
+            AC_MSG_RESULT($has_pthread_spin_trylock)
+
             # Restore the compiler flags and libraries
             CFLAGS="$ac_save_cflags"; LIBS="$ac_save_libs"