[SCM] GNU Autoconf source repository branch, master, updated. v2.64-58-g81f4709

[Ralf Wildenhues]

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- Log -----------------------------------------------------------------
commit 81f4709a56efced253cddf80f333e85fe136a974
Author: Bruno Haible <address@hidden>
Date:   Fri Oct 9 05:36:45 2009 +0200

    Recommend `sh -n' debugging, and public result variables for macros.
    
    * doc/autoconf.texi (Debugging): Recommend to use "bash -n
    configure".  Recommend the use of result variables as an
    alternative to run-if-true/run-if-false parameters.
    
    Signed-off-by: Ralf Wildenhues <address@hidden>

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

Summary of changes:
 ChangeLog         |    8 ++++++++
 doc/autoconf.texi |   10 +++++++++-
 2 files changed, 17 insertions(+), 1 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 21a5a6e..82d131c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2009-10-09  Bruno Haible  <address@hidden>
+           Ralf Wildenhues <address@hidden>
+
+       Recommend `sh -n' debugging, and public result variables for macros.
+       * doc/autoconf.texi (Debugging): Recommend to use "bash -n
+       configure".  Recommend the use of result variables as an
+       alternative to run-if-true/run-if-false parameters.
+
 2009-10-05  Bruno Haible  <address@hidden>
 
        * doc/autoconf.texi (Particular Functions): Swap sections about
diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index 6a31a21..fd76150 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -24280,6 +24280,13 @@ or listing some macro names and watch @command{m4} 
expand its input
 verbosely (@pxref{Debugging via autom4te}).
 
 @item
+Sometimes @command{autoconf} succeeds but the generated
address@hidden script has invalid shell syntax.  You can detect this
+case by running @samp{bash -n configure} or @samp{sh -n configure}.
+If this command fails, the same tips apply, as if @command{autoconf} had
+failed.
+
address@hidden
 Debugging @command{configure} script execution may be done by sprinkling
 pairs of @code{set -x} and @code{set +x} into the shell script before
 and after the region that contains a bug.  Running the whole script with
@@ -24339,7 +24346,8 @@ tests,
 @item
 by not requiring users of your macro to use the cache variables.
 Instead, expose the result of the test via @var{run-if-true} and
address@hidden parameters.
address@hidden parameters.  If the result is not a boolean,
+then provide it through documented shell variables.
 @end itemize
 
 


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