From: Paolo Bonzini <bonzini@gnu.org>
Date: Sat, 18 Oct 2008 12:37:11 +0000 (+0200)
Subject: Add AC_REQUIRE_SHELL_FN and the SHELL_FN diversion.
X-Git-Tag: v2.63b~228
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=98c907d8de4b550e056d292510588c4852967bc1;p=thirdparty%2Fautoconf.git

Add AC_REQUIRE_SHELL_FN and the SHELL_FN diversion.

* lib/autoconf/general.m4 (AC_REQUIRE_SHELL_FN): New.
(m4_divert(SHELL_FN)): New.
---

diff --git a/ChangeLog b/ChangeLog
index 81a1f5af..b9d42bf2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2008-10-20  Paolo Bonzini  <bonzini@gnu.org>
+
+	Add AC_REQUIRE_SHELL_FN and the SHELL_FN diversion.
+	* lib/autoconf/general.m4 (AC_REQUIRE_SHELL_FN): New.
+	(m4_divert(SHELL_FN)): New.
+
 2008-10-20  Eric Blake  <ebb9@byu.net>
 
 	Avoid unportable use of echo in testsuite.
diff --git a/lib/autoconf/general.m4 b/lib/autoconf/general.m4
index 83294c7e..0566dd1c 100644
--- a/lib/autoconf/general.m4
+++ b/lib/autoconf/general.m4
@@ -104,6 +104,9 @@
 # - VERSION_END
 #   Tail of the handling of --version.
 #
+# - SHELL_FN
+#   Shell functions.
+#
 # - INIT_PREPARE
 #   Tail of initialization code.
 #
@@ -146,6 +149,8 @@ m4_define([_m4_divert(VERSION_FSF)],    201)
 m4_define([_m4_divert(VERSION_USER)],   202)
 m4_define([_m4_divert(VERSION_END)],    203)
 
+m4_define([_m4_divert(SHELL_FN)],       250)
+
 m4_define([_m4_divert(INIT_PREPARE)],   300)
 
 
@@ -185,6 +190,20 @@ m4_define([AC_OBSOLETE],
 
 
 
+## ----------------------------- ##
+## Implementing shell functions. ##
+## ----------------------------- ##
+
+
+# AC_REQUIRE_SHELL_FN(NAME-TO-CHECK, COMMENT, BODY, [DIVERSION = SHELL_FN]
+# ------------------------------------------------------------------------
+# Same as AS_REQUIRE_SHELL_FN except that the default diversion comes
+# later in the script (speeding up configure --help and --version).
+AC_DEFUN([AC_REQUIRE_SHELL_FN],
+[AS_REQUIRE_SHELL_FN([$1], [$2], [$3], m4_default_quoted([$4], [SHELL_FN]))])
+
+
+
 ## ----------------------------- ##
 ## Implementing Autoconf loops.  ##
 ## ----------------------------- ##