[SCM] GNU Autoconf source repository branch, master, updated. v2.69-69-gc3d301e

[Gary V. Vaughan]

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- Log -----------------------------------------------------------------
commit c3d301efd6ffe1d908f5eb4f2b9df5380b8b2c3e
Author: Gary V. Vaughan <***@gnu.org>
Date: Tue Jan 29 19:17:04 2013 +0700

m4sugar: fix AS_VAR_GET regression.

AS_VAR_GET expands AS_ECHO inside en evaled single quoted string,
which causes the single quotes in "printf '%s\n'" to expose the
%s\n to the shell which expands "\n" to simply "n" before passing
it to printf.
* lib/m4sugar/m4sh.m4 (AS_ECHO): Use double quotes around the
format string.
* doc/autoconf.texi (Limitations of Shell Builtins): Show double
quotes to match AS_ECHO expansion.
* NEWS: Likewise.

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

Summary of changes:
NEWS | 2 +-
doc/autoconf.texi | 2 +-
lib/m4sugar/m4sh.m4 | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/NEWS b/NEWS
index 35e7b88..16de922 100644
--- a/NEWS
+++ b/NEWS
@@ -10,7 +10,7 @@ GNU Autoconf NEWS - User visible changes.

** Use of printf is now recommended instead of working around bugs in
echo. Macros AS_ECHO and AS_ECHO_N now expand unconditionally to
- "printf '%s\n'" and "printf %s".
+ 'printf "%s\n"' and 'printf %s'.

** Macros

diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index c95d871..8f58d4a 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -17523,7 +17523,7 @@ only if you know that @var{foo}'s value cannot contain backslashes and
cannot start with @samp{-}.

Normally, @command{printf} is safer and easier to use than @command{echo}
-and @command{echo -n}. Thus, you should use @command{printf '%s\n'}
+and @command{echo -n}. Thus, you should use @command{printf "%s\n"}
instead of @command{echo}, and similarly use @command{printf %s} instead
of @command{echo -n}.

diff --git a/lib/m4sugar/m4sh.m4 b/lib/m4sugar/m4sh.m4
index 479c2d9..53fdf8d 100644
--- a/lib/m4sugar/m4sh.m4
+++ b/lib/m4sugar/m4sh.m4
@@ -1026,7 +1026,7 @@ fi
# (typically a quoted string). The bytes of WORD are output as-is, even
# if it starts with "-" or contains "\".
m4_defun([AS_ECHO],
-[printf '%s\n' $1])
+[printf "%s\n" $1])


# AS_ECHO_N(WORD)


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