[SCM] GNU Autoconf source repository branch, master, updated. v2.65-9-gd4fdf04

[Ralf Wildenhues]

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- Log -----------------------------------------------------------------
commit d4fdf04459e9d11b51e971f9af3451fa56fd44a9
Author: Stefano Lattarini <address@hidden>
Date:   Sat Dec 5 12:56:30 2009 +0100

    Document Solaris/Heirloom sh set -e issue with command substitutions.
    
    * doc/autoconf.texi (Limitations of Builtins): Fix typos `set -d'
    in previous example.  Document failure to honor && lists with set -e
    and a command substitution in the failing command.
    Report and initial patch by Stefano Lattarini against Automake.
    
    Signed-off-by: Ralf Wildenhues <address@hidden>

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

Summary of changes:
 ChangeLog         |    9 +++++++++
 doc/autoconf.texi |   15 +++++++++++++--
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index e03604d..1c0c612 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2009-12-05  Stefano Lattarini  <address@hidden>
+           Ralf Wildenhues  <address@hidden>
+
+       Document Solaris/Heirloom sh set -e issue with command substitutions.
+       * doc/autoconf.texi (Limitations of Builtins): Fix typos `set -d'
+       in previous example.  Document failure to honor && lists with set -e
+       and a command substitution in the failing command.
+       Report and initial patch by Stefano Lattarini against Automake.
+
 2009-12-04  Eric Blake  <address@hidden>
 
        Warn if using unnamed diversion.
diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index 7d2c72e..3144610 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -16794,12 +16794,23 @@ When @samp{set -e} is in effect, a failed command 
substitution in
 Solaris @command{/bin/sh} cannot be ignored, even with @samp{||}.
 
 @example
-$ @kbd{/bin/sh -c 'set -d; foo=`false` || echo foo; echo bar'}
-$ @kbd{bash -c 'set -d; foo=`false` || echo foo; echo bar'}
+$ @kbd{/bin/sh -c 'set -e; foo=`false` || echo foo; echo bar'}
+$ @kbd{bash -c 'set -e; foo=`false` || echo foo; echo bar'}
 foo
 bar
 @end example
 
address@hidden
+Moreover, a command substitution, successful or not, causes this shell to
+exit from a failing outer command even in presence of an @samp{&&} list:
+
address@hidden
+$ @kbd{bash -c 'set -e; false `true` && echo notreached; echo ok'}
+ok
+$ @kbd{sh -c 'set -e; false `true` && echo notreached; echo ok'}
+$
address@hidden example
+
 Portable scripts should not use @samp{set -e} if @command{trap} is used
 to install an exit handler.  This is because Tru64/OSF 5.1 @command{sh}
 sometimes enters the trap handler with the exit status of the command


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