autoconf-archive-2016.03.20 released [stable]

[Peter Simons]

Autoconf Archive version 2016.03.20 is available for download.

Here are the compressed sources and a GPG detached signature[*]:
  http://ftpmirror.gnu.org/autoconf-archive/autoconf-archive-2016.03.20.tar.xz
  
http://ftpmirror.gnu.org/autoconf-archive/autoconf-archive-2016.03.20.tar.xz.sig

Use a mirror for higher download bandwidth:
  http://www.gnu.org/order/ftp.html

[*] Use a .sig file to verify that the corresponding file (without the
.sig suffix) is intact.  First, be sure to download both the .sig file
and the corresponding tarball.  Then, run a command like this:

  gpg --verify autoconf-archive-2016.03.20.tar.xz.sig

If that command fails because you don't have the required public key,
then run this command to import it:

  gpg --keyserver keys.gnupg.net --recv-keys 99089D72

and rerun the 'gpg --verify' command.

This release was bootstrapped with the following tools:
  Autoconf 2.69
  Automake 1.15
  Gnulib v0.1-729-gd78ae11

NEWS

* Noteworthy changes in release 2016.03.20 (2016-03-20) [stable]

  The following new macros have been added: AX_CHECK_GIRS_GJS,
  AX_CHECK_GIR_SYMBOLS_GJS, AX_CXX_COMPILE_STDCXX, AX_CXX_COMPILE_STDCXX_14,
  AX_CZMQ, AX_FC_CHECK_DEFINE, AX_LIB_NETCDF4, AX_PROG_GJS,
  AX_RESTORE_FLAGS_WITH_PREFIX, AX_SAVE_FLAGS_WITH_PREFIX, AX_VAR_POP,
  AX_VAR_PUSH, and AX_ZMQ.

  Various improvements to the opengl macros. Main features added:
    - Support action-if-found and not-found hook
    - Export HAVE_GL, HAVE_GLU, and HAVE_GLUT preprocessor symbol
    - Add necessary flags to CFLAGS/LIBS by default, but can be disabled by
      overwritting action-if-found hook.
    - Fail the configure script if lib not found. This feature can be disabled
      by overwritting action-if-not-found hook
    - Fix problems on Mac OSX. Been tested on Linux (Ubuntu) and OSX
    - Use --with-xquartz-gl instead of --with-gl=x for using X11 on OSX

  Many new features were added to AX_CODE_COVERAGE and AX_PROG_DOXYGEN.

  AX_CXX_COMPILE_STDCXX now modifies $(CXX) rather than $(CXXFLAGS).

  AX_PTHREAD has been updated significantly. See
  https://savannah.gnu.org/patch/?8186 for further details.

  AX_PYTHON_DEVEL now provides PYTHON_LIBS instead of PYTHON_FLAGS.

  The macros related to C++11 and C++14 were extensively re-factored.

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