3-gary-new-AC_PROG_SED.patch

[Gary V. Vaughan]

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Its been over 2 years since this message :-o
http://mail.gnu.org/archive/html/autoconf-patches/2002-01/msg00008.html

Resubmitting with docs and NEWS.

Okay to commit?

Cheers,
        Gary.
- --
Gary V. Vaughan      ())_.  address@hidden,gnu.org}
Research Scientist   ( '/   http://www.oranda.demon.co.uk
GNU Hacker           / )=   http://www.gnu.org/software/libtool
Technical Author   `(_~)_   http://sources.redhat.com/autobook
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Index: ChangeLog
from  Gary V. Vaugan  <address@hidden>

        * lib/autoconf/programs.m4 (AC_PROG_SED):  New macro to test for a
        non-truncating sed or gsed program in PATH.
        * tests/acprograms.at: Add it.
        * doc/autoconf.texi (Particular Programs): Document it.
        * NEWS: Updated.

Index: NEWS
===================================================================
RCS file: /cvsroot/autoconf/autoconf/NEWS,v
retrieving revision 1.323
diff -u -p -u -r1.323 NEWS
--- NEWS 12 Nov 2003 15:21:02 -0000 1.323
+++ NEWS 22 Jan 2004 13:24:09 -0000
@@ -1,5 +1,9 @@
 * Major changes in Autoconf 2.59a
 
+** AC_PROG_SED
+  New macro that tests for a sed program that truncates as few characters
+  as possible.
+
 * Major changes in Autoconf 2.59
 
   Released 2003-11-04, by Akim Demaille
Index: doc/autoconf.texi
===================================================================
RCS file: /cvsroot/autoconf/autoconf/doc/autoconf.texi,v
retrieving revision 1.794
diff -u -p -u -r1.794 autoconf.texi
--- doc/autoconf.texi 14 Jan 2004 20:27:31 -0000 1.794
+++ doc/autoconf.texi 22 Jan 2004 13:24:15 -0000
@@ -3366,6 +3366,14 @@ Set output variable @code{RANLIB} to @sa
 is found, and otherwise to @samp{:} (do nothing).
 @end defmac
 
address@hidden AC_PROG_SED
address@hidden {PROG_SED}
address@hidden SED
+Set output variable @code{SED} to a @code{sed} on @samp{PATH} that
+truncates as few characters as possible.  If @sc{GNU} Sed is found,
+use that instead.
address@hidden defmac
+
 @defmac AC_PROG_YACC
 @acindex{PROG_YACC}
 @ovindex YACC
Index: lib/autoconf/programs.m4
===================================================================
RCS file: /cvsroot/autoconf/autoconf/lib/autoconf/programs.m4,v
retrieving revision 1.17
diff -u -p -u -r1.17 programs.m4
--- lib/autoconf/programs.m4 22 May 2003 13:24:05 -0000 1.17
+++ lib/autoconf/programs.m4 22 Jan 2004 13:24:15 -0000
@@ -1,6 +1,6 @@
 # This file is part of Autoconf.                       -*- Autoconf -*-
 # Checking for programs.
-# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002
+# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 
2004
 # Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
@@ -499,6 +499,63 @@ AC_DEFUN([AC_PROG_RANLIB],
 AU_DEFUN([AC_RSH],
 [AC_DIAGNOSE([obsolete], [$0: is no longer supported.
 Remove this warning when you adjust the code.])])
+
+
+# AC_PROG_SED
+# -----------
+# Check for a fully functional sed program that truncates
+# as few characters as possible.  Prefer GNU sed if found.
+AC_DEFUN([AC_PROG_SED],
+[AC_MSG_CHECKING([for a sed that does not truncate output])
+if test -z "$SED"; then
+AC_CACHE_VAL(ac_cv_path_sed,
+[# Loop through the user's path and test for sed and gsed.
+# Then use that list of sed's as ones to test for truncation.
+_AS_PATH_WALK([$PATH],
+[for ac_prog in sed gsed; do
+  for ac_exec_ext in '' $ac_executable_extensions; do
+    if AS_EXECUTABLE_P(["$as_dir/$ac_prog$ac_exec_ext"]); then
+      _sed_list="$_sed_list $as_dir/$ac_prog$ac_exec_ext"
+    fi
+  done
+done])
+AS_TMPDIR([sed])
+_max=0
+# Add /usr/xpg4/bin/sed as it is typically found on Solaris
+# along with /bin/sed that truncates output.
+for _sed in $_sed_list /usr/xpg4/bin/sed; do
+  test ! -f $_sed && break
+  cat /dev/null > conftest.in
+  _count=0
+  echo $ECHO_N "0123456789$ECHO_C" >conftest.in
+  # Check for GNU sed and select it if it is found.
+  if "$_sed" --version 2>&1 < /dev/null | grep 'GNU' > /dev/null; then
+    ac_cv_path_sed=$_sed
+    break
+  fi
+  while true; do
+    cat conftest.in conftest.in >conftest.tmp
+    mv conftest.tmp conftest.in
+    cp conftest.in conftest.nl
+    echo >>conftest.nl
+    $_sed -e 's/a$//' < conftest.nl >conftest.out || break
+    cmp -s conftest.out conftest.nl || break
+    # 10000 chars as input seems more than enough
+    test $_count -gt 10 && break
+    _count=`expr $_count + 1`
+    if test $_count -gt $_max; then
+      _max=$_count
+      ac_cv_path_sed=$_sed
+    fi
+  done
+done
+rm -rf "$tmp"
+])
+fi
+SED=$ac_cv_path_sed
+AC_SUBST([SED])
+AC_MSG_RESULT([$SED])
+])
 
 
 # AC_PROG_YACC
Index: tests/acprograms.at
===================================================================
RCS file: /cvsroot/autoconf/autoconf/tests/acprograms.at,v
retrieving revision 1.4
diff -u -p -u -r1.4 acprograms.at
--- tests/acprograms.at 10 Sep 2003 16:54:12 -0000 1.4
+++ tests/acprograms.at 22 Jan 2004 13:24:15 -0000
@@ -4,7 +4,7 @@
 ## Do not edit by hand.  ##
 ## --------------------- ##
 
-# Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc.
+# Copyright (C) 2000, 2001, 2003, 2004 Free Software Foundation, Inc.
 
 AT_BANNER([Testing autoconf/programs macros.])
 
@@ -16,6 +16,7 @@ AT_CHECK_MACRO([AC_PROG_LEX])
 AT_CHECK_MACRO([AC_PROG_LN_S])
 AT_CHECK_MACRO([AC_PROG_MAKE_SET])
 AT_CHECK_MACRO([AC_PROG_RANLIB])
+AT_CHECK_MACRO([AC_PROG_SED])
 AT_CHECK_MACRO([AC_PROG_YACC])
 
 # Obsolete macros.