[SCM] GNU Autoconf source repository branch, master, updated. v2.63-71-g98c907d

[Paolo Bonzini]

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- Log -----------------------------------------------------------------
commit 98c907d8de4b550e056d292510588c4852967bc1
Author: Paolo Bonzini <address@hidden>
Date:   Sat Oct 18 14:37:11 2008 +0200

    Add AC_REQUIRE_SHELL_FN and the SHELL_FN diversion.
    
    * lib/autoconf/general.m4 (AC_REQUIRE_SHELL_FN): New.
    (m4_divert(SHELL_FN)): New.

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog               |    6 ++++++
 lib/autoconf/general.m4 |   19 +++++++++++++++++++
 2 files changed, 25 insertions(+), 0 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 81a1f5a..b9d42bf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2008-10-20  Paolo Bonzini  <address@hidden>
+
+       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  <address@hidden>
 
        Avoid unportable use of echo in testsuite.
diff --git a/lib/autoconf/general.m4 b/lib/autoconf/general.m4
index 83294c7..0566dd1 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)
 
 
@@ -186,6 +191,20 @@ 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.  ##
 ## ----------------------------- ##
 


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