[SCM] GNU Autoconf source repository branch, master, updated. v2.65-91-gf08d6f4

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- Log -----------------------------------------------------------------
commit f08d6f4f9f35c08cf7c0dee2f90b1bb2c0fb809e
Author: Bruno Haible <[email protected]>
Date:   Fri Jun 18 09:05:29 2010 -0600

    Document sed -e limitation.
    
    * doc/autoconf.texi (Limitations of Usual Tools): Mention portability
    problem of sed -e option with script fragments.
    
    Signed-off-by: Eric Blake <[email protected]>

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

Summary of changes:
 ChangeLog         |    6 ++++++
 doc/autoconf.texi |   16 ++++++++++++++++
 2 files changed, 22 insertions(+), 0 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 6e37499..52a7bb1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2010-06-18  Bruno Haible  <[email protected]>
+
+	Document sed -e limitation.
+	* doc/autoconf.texi (Limitations of Usual Tools): Mention portability
+	problem of sed -e option with script fragments.
+
 2010-06-17  Ralf Wildenhues  <[email protected]>
 
 	Document, test, and fix AT_ARG_OPTION, AT_ARG_OPTION_ARG.
diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index f6eb362..eba61f4 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -18237,6 +18237,22 @@ but Posix says that this use of a semicolon has undefined effect if
 should use semicolon only with simple scripts that do not use these
 verbs.
 
+The argument of the @option{-e} option must be a syntactically complete
+script.  GNU @command{sed} allows to pass multiple script fragments,
+each as argument of a separate @option{-e} option, that are then combined,
+with newlines between the fragments.  A future Posix revision may allow
+this as well.  But in Posix:2008, this is not allowed, and the
+@command{sed} programs on Solaris 10, HP-UX 11, and AIX don't allow it
+either:
+
+@example
+$ @kbd{echo a | sed -n -e 'i\}
+@kbd{0'}
+0
+$ @kbd{echo a | sed -n -e 'i\' -e 0}
+Unrecognized command: 0
+@end example
+
 Commands inside @{ @} brackets are further restricted.  Posix says that
 they cannot be preceded by addresses, @samp{!}, or @samp{;}, and that
 each command must be followed immediately by a newline, without any


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