2004-08-26 Roland McGrath <roland@redhat.com>

	* configure.in: New file.  If nptl add-on is also selected, barf if
	explicit and elide ourselves if implicit.
	* configure: Now generated.

linuxthreads/configure

@@ -1,6 +1,17 @@
-# This is only to keep the GNU C library configure mechanism happy.
+# This file is generated from configure.in by Autoconf.  DO NOT EDIT!
+
+# LinuxThreads fragment for GNU C library configure mechanism.
 # This is a shell script fragment sourced by the main configure script.
-# We have nothing we need to add here.
-#
-# Perhaps some day we will need a real configuration script for different
-# kernel versions or so.
+
+for other in $add_ons; do
+  test $other = nptl || continue
+  if test $add_ons_automatic = yes; then
+    echo "$as_me:$LINENO: result: $libc_add_on disabled because $other add-on is also in use" >&5
+echo "${ECHO_T}$libc_add_on disabled because $other add-on is also in use" >&6
+    libc_add_on=
+  else
+    { { echo "$as_me:$LINENO: error: cannot use both $libc_add_on and $other add-ons in one build" >&5
+echo "$as_me: error: cannot use both $libc_add_on and $other add-ons in one build" >&2;}
+   { (exit 1); exit 1; }; }
+  fi
+done

linuxthreads/configure.in

@@ -0,0 +1,14 @@
+GLIBC_PROVIDES dnl See top-level configure.in.
+
+# LinuxThreads fragment for GNU C library configure mechanism.
+# This is a shell script fragment sourced by the main configure script.
+
+for other in $add_ons; do
+  test $other = nptl || continue
+  if test $add_ons_automatic = yes; then
+    AC_MSG_RESULT($libc_add_on disabled because $other add-on is also in use)
+    libc_add_on=
+  else
+    AC_MSG_ERROR(cannot use both $libc_add_on and $other add-ons in one build)
+  fi
+done