Merge branch 'maint'

* maint:
  news: document deprecation of configure.in
  news: put planned backward compatibilities early
  sync: update files from upstream with "make fetch"
  maint: deprecate 'configure.in' as autoconf input
  maint: post-release minor version bump
  release: stable release 1.12.1
  copyright: update copyright years in a couple of files
  tests: avoid spurious failures with Solaris 9 cscope program
  maintcheck: fix a spurious failure
  perf: beginning of a performance testsuite
  aclocal: declare function prototypes, do not use '&' in function calls
  news: support for configure.in will be dropped in future automake versions
  tests: fix botched heading comments in 'lex-clean-cxx.sh'
  [ng] maintcheck: some tweaks and fixlets
  help: fix a typo in the list of warning categories
  maint: version bump after beta release
  release: beta release 1.12.0b (will become 1.12.1)
  release: remove overly picky check

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

diff --cc Makefile.am
Simple merge

diff --cc NEWS
index 6d83ac5,cf45836..282fde2
--- 1/NEWS
--- 2/NEWS
+++ b/NEWS
@@@ -36,43 -37,8 +36,47 @@@ New in 1.13
                            of the now-removed automatic de-ANSI-fication
                            support of Automake)
  
 -  - All the "old alias" macros in 'm4/obsolete.m4' will be removed in
 -    the next major Automake version (1.13).
 +  - All the "old alias" macros in 'm4/obsolete.m4' have been removed.
 +
 +* Changes to Automake-generated testsuite harnesses:
 +
 +  - The parallel testsuite harness (previously only enabled by the
 +    'parallel-tests' option) is the default one; the older serial
 +    testsuite harness will still be available through the use of the
 +    'serial-tests' option (introduced in Automake 1.12).
 +
 +* Silent rules support:
 +
 +  - Support for silent rules is now always active in Automake-generated
 +    Makefiles.  So, although the verbose output is still the default,
 +    the user can now always use "./configure --enable-silent-rules" or
 +    "make V=0" to enable quieter output in the package he's building.
 +
 +  - The 'silent-rules' option has now become a no-op, preserved for
 +    backward-compatibility only.  In particular, its use does not disable
 +    the warnings in the 'portability-recursive' category anymore.
 +
 +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 +
- New in 1.12.1:
++New in 1.12.2:
 +
 +* WARNING: Future backward-incompatibilities!
 +
++  - Future versions of Automake will likely drop support for the
++    long-deprecated 'configure.in' name for the Autoconf input file.
++    You are advised to use the recommended name 'configure.ac' instead.
++
 +  - Starting from the next major Automake version (1.13), the rules to
 +    build pdf, ps and dvi output from Texinfo input will use the '--tidy'
 +    option by default.  Since such an option was introduced in Texinfo
 +    4.9, this means that Makefiles generated by future Automake versions
 +    will require at least that version of Texinfo.
 +
 +  - Starting from the next major Automake version (1.13), the parallel
 +    testsuite harness (previously only enabled by the 'parallel-tests'
 +    option) will become the default one; the older serial testsuite
 +    harness will still be available through the use of the 'serial-tests'
 +    option.
  
    - Support for the two- and three-arguments invocation forms of the
      AM_INIT_AUTOMAKE macro will be deprecated in the next minor version

diff --cc aclocal.in
Simple merge

diff --cc defs
Simple merge

diff --cc syntax-checks.mk
Simple merge

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