Issue #18235: Fix the sysconfig variables LDSHARED and BLDSHARED under AIX.

Patch by David Edelsohn.

diff --cc Lib/sysconfig.py
Simple merge

diff --cc Misc/NEWS
index be4635bf55ecd33ecdac1520113edf6b6c2320eb,efe7cb83d3334a431fbb3453db6bd4b21a56ad8f..5d4ac7504aac5da53853226fa8a86c48e0f43bf3
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -10,92 -12,76 +10,95 @@@ Projected release date: 2013-10-2
  Core and Builtins
  -----------------
  
 +- Issue #19301: Give classes and functions that are explicitly marked global a
 +  global qualname.
 +
  - Issue #19279: UTF-7 decoder no more produces illegal strings.
  
 -- Fix macro expansion of _PyErr_OCCURRED(), and make sure to use it in at
 -  least one place so as to avoid regressions.
 +- Issue #16612: Add "Argument Clinic", a compile-time preprocessor for
 +  C files to generate argument parsing code.  (See PEP 436.)
  
 -- Issue #19014: memoryview.cast() is now allowed on zero-length views.
 +- Issue #18810: Shift stat calls in importlib.machinery.FileFinder such that
 +  the code is optimistic that if something exists in a directory named exactly
 +  like the possible package being searched for that it's in actuality a
 +  directory.
  
 -- Issue #19098: Prevent overflow in the compiler when the recursion limit is set
 -  absurdly high.
 +- Issue #18416: importlib.machinery.PathFinder now treats '' as the cwd and
 +  importlib.machinery.FileFinder no longer special-cases '' to '.'. This leads
 +  to modules imported from cwd to now possess an absolute file path for
 +  __file__ (this does not affect modules specified by path on the CLI but it
 +  does affect -m/runpy). It also allows FileFinder to be more consistent by not
 +  having an edge case.
  
 -- Issue #18942: sys._debugmallocstats() output was damaged on Windows.
 +- Issue #4555: All exported C symbols are now prefixed with either
 +  "Py" or "_Py".
  
 -- Issue #18667: Add missing "HAVE_FCHOWNAT" symbol to posix._have_functions.
 +- Issue #19219: Speed up marshal.loads(), and make pyc files slightly
 +  (5% to 10%) smaller.
  
 -- Issue #18368: PyOS_StdioReadline() no longer leaks memory when realloc()
 -  fails.
 +- Issue #19221: Upgrade Unicode database to version 6.3.0.
  
 -- Issue #16741: Fix an error reporting in int().
 +- Issue #16742: The result of the C callback PyOS_ReadlineFunctionPointer must
 +  now be a string allocated by PyMem_RawMalloc() or PyMem_RawRealloc() (or NULL
 +  if an error occurred), instead of a string allocated by PyMem_Malloc() or
 +  PyMem_Realloc().
  
 -- Issue #17899: Fix rare file descriptor leak in os.listdir().
 +- Issue #19199: Remove ``PyThreadState.tick_counter`` field
  
 -- Issue #18552: Check return value of PyArena_AddPyObject() in
 -  obj2ast_object().
 +- Fix macro expansion of _PyErr_OCCURRED(), and make sure to use it in at
 +  least one place so as to avoid regressions.
  
 -- Issue #18560: Fix potential NULL pointer dereference in sum().
 +- Issue #19087: Improve bytearray allocation in order to allow cheap popping
 +  of data at the front (slice deletion).
  
 -- Issue #15905: Fix theoretical buffer overflow in handling of sys.argv[0],
 -  prefix and exec_prefix if the operation system does not obey MAXPATHLEN.
 +- Issue #19014: memoryview.cast() is now allowed on zero-length views.
  
 -- Issue #18344: Fix potential ref-leaks in _bufferedreader_read_all().
 +- Issue #18690: memoryview is now automatically registered with
 +  collections.abc.Sequence
  
 -- Issue #17872: Fix a segfault in marshal.load() when input stream returns
 -  more bytes than requested.
 +- Issue #19078: memoryview now correctly supports the reversed builtin
 +  (Patch by Claudiu Popa)
  
 -- Issue #18426: Fix NULL pointer dereference in C extension import when
 -  PyModule_GetDef() returns an error.
 +Library
 +-------
  
 -- Issue #18328: Reorder ops in PyThreadState_Delete*() functions. Now the
 -  tstate is first removed from TLS and then deallocated.
++- Issue #18235: Fix the sysconfig variables LDSHARED and BLDSHARED under AIX.
++  Patch by David Edelsohn.
+ 
 -- Issue #18184: PyUnicode_FromFormat() and PyUnicode_FromFormatV() now raise
 -  OverflowError when an argument of %c format is out of range.
 +- Issue #18606: Add the new "statistics" module (PEP 450).  Contributed
 +  by Steven D'Aprano.
  
 -- Issue #18137: Detect integer overflow on precision in float.__format__()
 -  and complex.__format__().
 +- Issue #12866: The audioop module now supports 24-bit samples.
  
 -- Issue #18183: Fix various unicode operations on strings with large unicode
 -  codepoints.
 +- Issue #19254: Provide an optimized Python implementation of pbkdf2_hmac.
  
 -- Issue #18180: Fix ref leak in _PyImport_GetDynLoadWindows().
 +- Issues #19201, #19222, #19223: Add "x" mode (exclusive creation) in opening
 +  file to bz2, gzip and lzma modules. Patches by Tim Heaney and Vajrasky Kok.
  
 -- Issue #18038: SyntaxError raised during compilation sources with illegal
 -  encoding now always contains an encoding name.
 +- Fix a reference count leak in _sre.
  
 -- Issue #17644: Fix a crash in str.format when curly braces are used in square
 -  brackets.
 +- Issue #19262: Initial check in of the 'asyncio' package (a.k.a. Tulip,
 +  a.k.a. PEP 3156).  There are no docs yet, and the PEP is slightly
 +  out of date with the code.  This module will have *provisional* status
 +  in Python 3.4.
  
 -- Issue #17983: Raise a SyntaxError for a ``global __class__`` statement in a
 -  class body.
 +- Issue #19276: Fixed the wave module on 64-bit big-endian platforms.
  
 -- Issue #17927: Frame objects kept arguments alive if they had been copied into
 -  a cell, even if the cell was cleared.
 +- Issue #19266: Rename the new-in-3.4 ``contextlib.ignore`` context manager
 +  to ``contextlib.suppress`` in order to be more consistent with existing
 +  descriptions of that operation elsewhere in the language and standard
 +  library documentation (Patch by Zero Piraeus).
  
 -Library
 --------
 +- Issue #18891: Completed the new email package (provisional) API additions
 +  by adding new classes EmailMessage, MIMEPart, and ContentManager.
  
 -- Issue #18235: Fix the sysconfig variables LDSHARED and BLDSHARED under AIX.
 -  Patch by David Edelsohn.
 +- Issue #18281: Unused stat constants removed from `tarfile`.
  
 -- Issue #19276: Fixed the wave module on 64-bit big-endian platforms.
 +- Issue #18468: The re.split, re.findall, and re.sub functions and the group()
 +  and groups() methods of match object now always return a string or a bytes
 +  object.
 +
 +- Issue #18725: The textwrap module now supports truncating multiline text.
  
  - Issue #18776: atexit callbacks now display their full traceback when they
    raise an exception.