Merge branch 'objc++' into maint

* objc++:
  objc, objc++: test support for compilation flags
  objc, objc++: add stress test
  objc, objc++: test automatic dependency tracking
  objc: reorganize basic tests
  objc++, objc: add first semantic tests
  objc++: add first basic test
  news: announce initial support for Objective C++
  objc++: test support for '.mm' suffix in _SOURCES entries
  objc++: add documentation
  objc++: initial support for Objective C++

Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>

diff --cc NEWS
index 6db2592,7d0abcd..dcfd8c1
--- 1/NEWS
--- 2/NEWS
+++ b/NEWS
@@@ -49,43 -65,6 +49,48 @@@ New in 1.12.1
      search path are looked up is probably going to be changed in the
      next Automake release (1.13).
  
++* New supported languages:
++
++  - Support for Objective C++ has been added; it should work similarly to
++    the support for Objective C.
++
 +* Deprecated obsolescent features:
 +
 +  - Support for the "Cygnus-style" trees (enabled by the 'cygnus' option) is
 +    now deprecated (its use triggers a warning in the 'obsolete' category).
 +    It will be removed in the next major Automake release (1.13).
 +
 +  - The long-obsolete (since 1.10) automake-provided $(mkdir_p) make
 +    variable, @mkdir_p@ configure-time substitution and AM_PROG_MKDIR
 +    m4 macro are deprecated, eliciting a warning in the 'obsolete'
 +    category.  They will be removed in the next major version (1.13).
 +
 +Bugs fixed in 1.12.1:
 +
 +* Bugs introduced by 1.12:
 +
 +  - Several weaknesses in Automake's own build system and test suite
 +    have been fixed.
 +
 +* Bugs introduced by 1.11.3:
 +
 +  - When given non-option arguments, aclocal rejects them, instead of
 +    silently ignoring them.
 +
 +* Long-standing bugs:
 +
 +  - When the 'color-tests' option is in use, forcing of colored testsuite
 +    output through "AM_COLOR_TESTS=always" works even if the terminal is
 +    a non-ANSI one, i.e., if the TERM environment variable has a value of
 +    "dumb".
 +
 +  - Several inefficiencies and poor performances in the implementation
 +    of the parallel-tests 'check' and 'recheck' targets have been fixed.
 +
 +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 +
 +New in 1.12:
 +
  * Obsolete features removed:
  
    - The never documented nor truly used script 'acinstall' has been

diff --cc automake.in
Simple merge

diff --cc doc/automake.texi
Simple merge

diff --cc t/list-of-tests.mk
Simple merge