break up acinclude.m4 into individual files, which will make it easier to maintain, easier to add new macros (less patching) and will ease maintenance of these macros across Asterisk branches

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@151240 65c4cc65-6c06-0410-ace0-fbb531ad65f3

autoconf/ast_prog_sed.m4

@@ -0,0 +1,21 @@
+# 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