[SCM] GNU Autoconf source repository branch, master, updated. v2.63-276-ge8e30e2

[Eric Blake]

This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "GNU Autoconf source repository".

http://git.sv.gnu.org/gitweb/?p=autoconf.git;a=commitdiff;h=e8e30e268da0fbf2f53fcc366d3cef59bc47119c

The branch, master has been updated
       via  e8e30e268da0fbf2f53fcc366d3cef59bc47119c (commit)
      from  cfb18d385bedc181f903a560c5ae84517c702940 (commit)

Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.

- Log -----------------------------------------------------------------
commit e8e30e268da0fbf2f53fcc366d3cef59bc47119c
Author: Eric Blake <address@hidden>
Date:   Thu Feb 5 06:12:24 2009 -0700

    Mention new AC_DEFUN_ONCE clients.
    
    * NEWS: Mention recent semantic changes.
    Reported by Ralf Wildenhues.
    
    Signed-off-by: Eric Blake <address@hidden>

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

Summary of changes:
 ChangeLog |    6 ++++++
 NEWS      |   10 ++++++++++
 2 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 67b207c..c72253a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2009-02-05  Eric Blake  <address@hidden>
+
+       Mention new AC_DEFUN_ONCE clients.
+       * NEWS: Mention recent semantic changes.
+       Reported by Ralf Wildenhues.
+
 2009-02-03  Eric Blake  <address@hidden>
 
        Use AC_DEFUN_ONCE for some one-shot AC_PROG macros.
diff --git a/NEWS b/NEWS
index ba006cd..94b310e 100644
--- a/NEWS
+++ b/NEWS
@@ -20,6 +20,16 @@ GNU Autoconf NEWS - User visible changes.
    and subsequent invocations are a silent no-op.  This makes
    AC_DEFUN_ONCE an ideal macro for silencing AC_REQUIRE warnings.
 
+** The following macros are now defined with AC_DEFUN_ONCE.  This means
+   a subtle change in semantics; previously, an AC_DEFUN macro could
+   expand one of these macros multiple times or surround the macro
+   inside shell conditional text to bypass the effects of these
+   macros, but now the macro will expand exactly once, and prior to
+   the start of any enclosing AC_DEFUN macro:
+   AC_CANONICAL_BUILD  AC_CANONICAL_HOST  AC_CANONICAL_TARGET
+   AC_HEADER_ASSERT  AC_PROG_INSTALL  AC_PROG_MKDIR_P
+   AC_USE_SYSTEM_EXTENSIONS
+
 ** AC_LANG_ERLANG works once again (regression introduced in 2.61a).
 
 ** AC_HEADER_ASSERT is fixed so that './configure --enable-assert' no


hooks/post-receive
--
GNU Autoconf source repository