--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+2009-02-27  Bruno Haible  <bruno@clisp.org>
+
+	Avoid spurious "(cached)" in configure output.
+	* m4/gnulib-common.m4 (gl_CACHE_VAL_SILENT): New macro.
+	* m4/ceil.m4 (gl_FUNC_CEIL_LIBS): Use it instead of AC_CACHE_VAL.
+	* m4/ceilf.m4 (gl_FUNC_CEILF_LIBS): Likewise.
+	* m4/ceill.m4 (gl_FUNC_CEILL_LIBS): Likewise.
+	* m4/floor.m4 (gl_FUNC_FLOOR_LIBS): Likewise.
+	* m4/floorf.m4 (gl_FUNC_FLOORF_LIBS): Likewise.
+	* m4/floorl.m4 (gl_FUNC_FLOORL_LIBS): Likewise.
+	* m4/stdarg.m4 (gl_STDARG_H): Likewise.
+	Reported by Eric Blake.
+
 2009-02-27  Eric Blake  <ebb9@byu.net>
 
 	printf: fix regression in previous patch
@@ -10,7 +23,6 @@
 	* lib/stdint.in.h: Likewise.
 	Suggested by Eric Blake. Reported by Peter Bray <pdb_ml@yahoo.com.au>.
 
-
 2009-02-27  Eric Blake  <ebb9@byu.net>
 
 	doc: mention more functions added in cygwin 1.7.0

--- a/m4/ceil.m4
+++ b/m4/ceil.m4
@@ -1,5 +1,5 @@
-# ceil.m4 serial 2
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# ceil.m4 serial 3
+dnl Copyright (C) 2007, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -18,7 +18,7 @@
 # Sets CEIL_LIBM.
 AC_DEFUN([gl_FUNC_CEIL_LIBS],
 [
-  AC_CACHE_VAL([gl_cv_func_ceil_libm], [
+  gl_CACHE_VAL_SILENT([gl_cv_func_ceil_libm], [
     gl_cv_func_ceil_libm=?
     AC_TRY_LINK([
        #ifndef __NO_MATH_INLINES

--- a/m4/ceilf.m4
+++ b/m4/ceilf.m4
@@ -1,5 +1,5 @@
-# ceilf.m4 serial 3
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# ceilf.m4 serial 4
+dnl Copyright (C) 2007, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -34,7 +34,7 @@
 # Sets CEILF_LIBM.
 AC_DEFUN([gl_FUNC_CEILF_LIBS],
 [
-  AC_CACHE_VAL([gl_cv_func_ceilf_libm], [
+  gl_CACHE_VAL_SILENT([gl_cv_func_ceilf_libm], [
     gl_cv_func_ceilf_libm=?
     AC_TRY_LINK([
        #ifndef __NO_MATH_INLINES

--- a/m4/ceill.m4
+++ b/m4/ceill.m4
@@ -1,5 +1,5 @@
-# ceill.m4 serial 3
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# ceill.m4 serial 4
+dnl Copyright (C) 2007, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -34,7 +34,7 @@
 # Sets CEILL_LIBM.
 AC_DEFUN([gl_FUNC_CEILL_LIBS],
 [
-  AC_CACHE_VAL([gl_cv_func_ceill_libm], [
+  gl_CACHE_VAL_SILENT([gl_cv_func_ceill_libm], [
     gl_cv_func_ceill_libm=?
     AC_TRY_LINK([
        #ifndef __NO_MATH_INLINES

--- a/m4/floor.m4
+++ b/m4/floor.m4
@@ -1,5 +1,5 @@
-# floor.m4 serial 2
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# floor.m4 serial 3
+dnl Copyright (C) 2007, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -18,7 +18,7 @@
 # Sets FLOOR_LIBM.
 AC_DEFUN([gl_FUNC_FLOOR_LIBS],
 [
-  AC_CACHE_VAL([gl_cv_func_floor_libm], [
+  gl_CACHE_VAL_SILENT([gl_cv_func_floor_libm], [
     gl_cv_func_floor_libm=?
     AC_TRY_LINK([
        #ifndef __NO_MATH_INLINES

--- a/m4/floorf.m4
+++ b/m4/floorf.m4
@@ -1,5 +1,5 @@
-# floorf.m4 serial 3
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# floorf.m4 serial 4
+dnl Copyright (C) 2007, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -34,7 +34,7 @@
 # Sets FLOORF_LIBM.
 AC_DEFUN([gl_FUNC_FLOORF_LIBS],
 [
-  AC_CACHE_VAL([gl_cv_func_floorf_libm], [
+  gl_CACHE_VAL_SILENT([gl_cv_func_floorf_libm], [
     gl_cv_func_floorf_libm=?
     AC_TRY_LINK([
        #ifndef __NO_MATH_INLINES

--- a/m4/floorl.m4
+++ b/m4/floorl.m4
@@ -1,5 +1,5 @@
-# floorl.m4 serial 3
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# floorl.m4 serial 4
+dnl Copyright (C) 2007, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -34,7 +34,7 @@
 # Sets FLOORL_LIBM.
 AC_DEFUN([gl_FUNC_FLOORL_LIBS],
 [
-  AC_CACHE_VAL([gl_cv_func_floorl_libm], [
+  gl_CACHE_VAL_SILENT([gl_cv_func_floorl_libm], [
     gl_cv_func_floorl_libm=?
     AC_TRY_LINK([
        #ifndef __NO_MATH_INLINES

--- a/m4/gnulib-common.m4
+++ b/m4/gnulib-common.m4
@@ -1,4 +1,4 @@
-# gnulib-common.m4 serial 10
+# gnulib-common.m4 serial 11
 dnl Copyright (C) 2007-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -109,3 +109,16 @@
 [
   AC_C_BIGENDIAN
 ])
+
+# gl_CACHE_VAL_SILENT(cache-id, command-to-set-it)
+# is like AC_CACHE_VAL(cache-id, command-to-set-it), except that it does not
+# output a spurious "(cached)" mark in the midst of other configure output.
+# This macro should be used instead of AC_CACHE_VAL when it is not surrounded
+# by an AC_MSG_CHECKING/AC_MSG_RESULT pair.
+AC_DEFUN([gl_CACHE_VAL_SILENT],
+[
+  saved_as_echo_n="$as_echo_n"
+  as_echo_n=':'
+  AC_CACHE_VAL([$1], [$2])
+  as_echo_n="$saved_as_echo_n"
+])

--- a/m4/stdarg.m4
+++ b/m4/stdarg.m4
@@ -1,5 +1,5 @@
-# stdarg.m4 serial 2
-dnl Copyright (C) 2006, 2008 Free Software Foundation, Inc.
+# stdarg.m4 serial 3
+dnl Copyright (C) 2006, 2008-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -46,7 +46,7 @@
     else
       dnl Provide a substitute in <config.h>, either __va_copy or as a simple
       dnl assignment.
-      AC_CACHE_VAL([gl_cv_func___va_copy], [
+      gl_CACHE_VAL_SILENT([gl_cv_func___va_copy], [
         AC_TRY_COMPILE([#include <stdarg.h>], [
 #ifndef __va_copy
 error, bail out