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Re: Last configure args

From: Ralf Wildenhues
Subject: Re: Last configure args
Date: Mon, 3 Jan 2005 14:56:24 +0100
User-agent: Mutt/1.4.1i

* Bob Friesenhahn wrote on Sun, Jan 02, 2005 at 11:17:37PM CET:
> Use
>  ./config.status --version
> to see the options used.  At one time in the life of config.status it 
> was possible to simply paste the complete line output by config.status 
> --version but then someone decided to make the output fancy and it is 
> no longer usable as one line anymore.  Now it is necessary to 
> cut-and-paste two parts.

I did not know about --version, thanks!

Might be nice to have the information reusable as well
(--config comes to mind).  See below.

> Unfortunately, using
>  ./config.status --recheck
> to reconfigure is not the complete solution to re-configuring since 
> there are files it will not update (e.g. config.status).

  ./config.status --recheck && ./config.status

should do what you intend.

Below is a patch which implements reusable configure information with
  ./config.status --config
I'm not sure whether I want $ac_cs_configure there as well -- is it
possible for it to contain more than one word?


        * lib/autoconf/status.m4 (_AC_OUTPUT_CONFIG_STATUS): New option
        `--config' for config.status, to output parseable configuration
        * doc/autoconf.texi (config.status Invocation): Document it.

Index: doc/autoconf.texi
RCS file: /cvsroot/autoconf/autoconf/doc/autoconf.texi,v
retrieving revision 1.860
diff -u -r1.860 autoconf.texi
--- doc/autoconf.texi   3 Jan 2005 08:31:44 -0000       1.860
+++ doc/autoconf.texi   3 Jan 2005 10:19:01 -0000
@@ -13505,6 +13505,9 @@
 @itemx -V
 Print the version number of Autoconf and exit.
address@hidden --config
+Print the command to recreate the current configuration.
 @item --silent
 @itemx --quiet
 @itemx -q
Index: lib/autoconf/status.m4
RCS file: /cvsroot/autoconf/autoconf/lib/autoconf/status.m4,v
retrieving revision 1.48
diff -u -r1.48 status.m4
--- lib/autoconf/status.m4      21 Dec 2004 14:24:01 -0000      1.48
+++ lib/autoconf/status.m4      3 Jan 2005 13:37:07 -0000
@@ -1348,6 +1348,7 @@
   -h, --help       print this help, then exit
   -V, --version    print version number, then exit
+      --config     print configuration
   -q, --quiet      do not print progress messages
   -d, --debug      don't remove temporary files
       --recheck    update $as_me by reconfiguring in the same conditions
@@ -1384,11 +1385,13 @@
+ac_cs_config="`echo "$ac_configure_args" | sed 's/[[\\""\`\$]]/\\\\&/g'`"
 m4_ifset([AC_PACKAGE_NAME], [AC_PACKAGE_NAME ])config.status[]dnl
-configured by $[0], generated by m4_PACKAGE_STRING,
-  with options \\"`echo "$ac_configure_args" | sed 's/[[\\""\`\$]]/\\\\&/g'`\\"
+configured by \$ac_cs_configure, generated by m4_PACKAGE_STRING,
+  with options \\"\$ac_cs_config\\"
 Copyright (C) 2004 Free Software Foundation, Inc.
 This config.status script is free software; the Free Software Foundation
@@ -1432,6 +1435,8 @@
     ac_cs_recheck=: ;;
   --version | --vers* | -V )
     echo "$ac_cs_version"; exit 0 ;;
+  --config | --conf* )
+    echo "$ac_cs_configure $ac_cs_config"; exit 0 ;;
   --he | --h)
     # Conflict between --help and --header
     AC_MSG_ERROR([ambiguous option: $[1]

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