Re: extra error messages on Mac OS X

Thanks, I pushed the following slightly-different patch
(I found a couple more instances of the problem):

From e14f3fe48c2b206d3ec4e0afaa4c7b2c99349b4a Mon Sep 17 00:00:00 2001
From: Paul Eggert <[email protected]>
Date: Fri, 8 Mar 2013 08:56:18 -0800
Subject: [PATCH] AC_PROG_CC etc: avoid warnings when removing conftest* on OS
 X

Reported by Nobuyoshi Nakada in:
http://lists.gnu.org/archive/html/autoconf-patches/2013-03/msg00003.html
* lib/autoconf/c.m4 (AC_PROG_CC, AC_PROG_CC_C_O, AC_PROG_CXX_C_O):
* lib/autoconf/fortran.m4 (_AC_PROG_FC_C_O):
* lib/autoconf/functions.m4 (AC_FUNC_SELECT_ARGTYPES):
Use rm -rf, not just rm -f, when removing conftest*.
---
 lib/autoconf/c.m4         | 6 +++---
 lib/autoconf/fortran.m4   | 2 +-
 lib/autoconf/functions.m4 | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/lib/autoconf/c.m4 b/lib/autoconf/c.m4
index 6fe00fb..a810a09 100644
--- a/lib/autoconf/c.m4
+++ b/lib/autoconf/c.m4
@@ -513,7 +513,7 @@ else
   AC_MSG_RESULT([no])
   eval ac_cv_prog_cc_${ac_cc}_c_o=no
 fi
-rm -f core conftest*
+rm -rf core conftest*
 ])])dnl
 AC_LANG_POP(C)dnl
 ])# AC_PROG_CC
@@ -626,7 +626,7 @@ then
 else
   eval ac_cv_prog_cc_${ac_cc}_c_o=no
 fi
-rm -f core conftest*
+rm -rf core conftest*
 ])dnl
 if eval test \$ac_cv_prog_cc_${ac_cc}_c_o = yes; then
   AC_MSG_RESULT([yes])
@@ -823,7 +823,7 @@ if _AC_DO_VAR(ac_try) &&
 else
   ac_cv_prog_cxx_c_o=no
 fi
-rm -f conftest*])
+rm -rf conftest*])
 if test $ac_cv_prog_cxx_c_o = no; then
   AC_DEFINE(CXX_NO_MINUS_C_MINUS_O, 1,
 	    [Define to 1 if your C++ compiler doesn't accept
diff --git a/lib/autoconf/fortran.m4 b/lib/autoconf/fortran.m4
index 3293657..f20b029 100644
--- a/lib/autoconf/fortran.m4
+++ b/lib/autoconf/fortran.m4
@@ -451,7 +451,7 @@ if _AC_DO_VAR(ac_try) &&
 else
   ac_cv_prog_[]_AC_LANG_ABBREV[]_c_o=no
 fi
-rm -f conftest*])
+rm -rf conftest*])
 if test $ac_cv_prog_[]_AC_LANG_ABBREV[]_c_o = no; then
   AC_DEFINE([]_AC_FC[]_NO_MINUS_C_MINUS_O, 1,
 	    [Define to 1 if your Fortran compiler doesn't accept
diff --git a/lib/autoconf/functions.m4 b/lib/autoconf/functions.m4
index 1b56641..f994a4a 100644
--- a/lib/autoconf/functions.m4
+++ b/lib/autoconf/functions.m4
@@ -1510,7 +1510,7 @@ AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG234, ($[2]),
 		   [Define to the type of args 2, 3 and 4 for `select'.])
 AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG5, ($[3]),
 		   [Define to the type of arg 5 for `select'.])
-rm -f conftest*
+rm -rf conftest*
 ])# AC_FUNC_SELECT_ARGTYPES
 
 
-- 
1.7.11.7