configure.in: Add AIX multithread support fragment.

	* configure.in: Add AIX multithread support fragment.
	* config/aix.mt: Define _PTHREADS in MT_CFLAGS if -pthread
	commandline option present.

From-SVN: r36543

libstdc++/ChangeLog

+2000-09-19  David Edelsohn  <edelsohn@gnu.org>
+
+	* configure.in: Add AIX multithread support fragment.
+	* config/aix.mt: Define _PTHREADS in MT_CFLAGS if -pthread
+	commandline option present.
+
 2000-08-14  Zack Weinberg  <zack@wolery.cumb.org>
 
 	* configure.in: Accept *-*-linux* not just *-*-linux-gnu*.
@@ -67,7 +73,7 @@
 
 	* Makefile.in: Change "pic" to depend on $(PICFLAG), not
 	on $(enable_shared).
-	* aix.ml: Build AIX-style shared library.
+	* config/aix.ml: Build AIX-style shared library.
 
 2000-05-10  Jakub Jelinek  <jakub@redhat.com>
 

libstdc++/config/aix.mt

+MT_CFLAGS = `case "$(CXXFLAGS)" in *-pthread* ) echo -D_PTHREADS ;; esac`

libstdc++/configure.in

@@ -89,6 +89,8 @@ fi
 
 # Make sure the right flags are defined for multi-threading.
 case "${target}" in
+  *-*-aix*)	
+	frags="${frags} aix.mt" ;;
   *-*-linux*)
 	case "x${enable_threads}" in
 		xyes|xposix)	frags="${frags} linux.mt" ;;