AC_PROG_SED is included in autoconf 2.60, but apparently it is not included

in 2.59.  So, to maintain compatability with 2.59 since it is a small change,
copy this macro into acinclude.m4 and rename it to AST_PROG_SED.
(issue #8345)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@47527 65c4cc65-6c06-0410-ace0-fbb531ad65f3

acinclude.m4

@@ -499,7 +499,7 @@ AC_DEFUN([AST_PROG_LD],
 	[assume the C compiler uses GNU ld @<:@default=no@:>@])],
     [test "$withval" = no || with_gnu_ld=yes],
     [with_gnu_ld=no])
-AC_REQUIRE([AC_PROG_SED])dnl
+AC_REQUIRE([AST_PROG_SED])dnl
 AC_REQUIRE([AC_PROG_CC])dnl
 AC_REQUIRE([AC_CANONICAL_HOST])dnl
 AC_REQUIRE([AC_CANONICAL_BUILD])dnl
@@ -604,4 +604,25 @@ m4_ifndef([AST_PROG_EGREP], [AC_DEFUN([AST_PROG_EGREP],
  AC_SUBST([EGREP])
 ])]) # AST_PROG_EGREP
 
+# AST_PROG_SED
+# -----------
+# Check for a fully functional sed program that truncates
+# as few characters as possible.  Prefer GNU sed if found.
+AC_DEFUN([AST_PROG_SED],
+[AC_CACHE_CHECK([for a sed that does not truncate output], ac_cv_path_SED,
+    [dnl ac_script should not contain more than 99 commands (for HP-UX sed),
+     dnl but more than about 7000 bytes, to catch a limit in Solaris 8 /usr/ucb/sed.
+     ac_script=s/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/
+     for ac_i in 1 2 3 4 5 6 7; do
+       ac_script="$ac_script$as_nl$ac_script"
+     done
+     echo "$ac_script" | sed 99q >conftest.sed
+     $as_unset ac_script || ac_script=
+     _AC_PATH_PROG_FEATURE_CHECK(SED, [sed gsed],
+	[_AC_FEATURE_CHECK_LENGTH([ac_path_SED], [ac_cv_path_SED],
+		["$ac_path_SED" -f conftest.sed])])])
+ SED="$ac_cv_path_SED"
+ AC_SUBST([SED])dnl
+ rm -f conftest.sed
+])# AST_PROG_SED