add ac_define for pthreads.

configure.in

@@ -16,7 +16,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 # init the project
-AC_INIT(src/sched.c)
+AC_INIT(src/qsched.c)
 VERSION="0.1.0"
 AC_SUBST(VERSION)
 AM_INIT_AUTOMAKE(QUICKSCHED,VERSION)
@@ -48,7 +48,8 @@ AC_HEADER_STDC
 
 # Check for pthreads
 ACX_PTHREAD([LIBS="$PTHREAD_LIBS $LIBS" CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
-    CC="$PTHREAD_CC" LDFLAGS="$PTHREAD_LIBS $LIBS"],
+    CC="$PTHREAD_CC" LDFLAGS="$PTHREAD_LIBS $LIBS"
+    AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.])],
     AC_MSG_ERROR([Could not find a working version of
     the pthread library. Make sure you have the library and header files installed
     or use CPPFLAGS and LDFLAGS if the library is installed in a