Issue #23445: pydebug builds now use "gcc -Og" where possible, to make the resulting executable faster.

availability of the function is checked during the compilation. Patch written
by Bernard Spil.

instead of reading /dev/urandom, to get pseudo-random bytes.

python --generate-posix-vars in pybuilddir.txt build target by ensuring
that pybuilddir.txt is always regenerated when configure is run and
that the newly built skeleton python does not inadvertently import
modules from previously installed instances.

Patch from Stefan Krah.

  in a ncursesw directory.

for mbrtowc().

upgrade pip by default, using the bundled pip provided by the new ensurepip
module.  A new configure option, --with-ensurepip[=upgrade|install|no], is
available to override the default ensurepip "--upgrade" option.  The option
can also be set with "make [alt]install ENSUREPIP=[upgrade|install\no]".

in bin directories for all configurations: non-framework vs framework,
and single arch vs universal builds.  pythonx.y-32 is now always
installed for 64-bit/32-bit universal builds.  The obsolete and
undocumented pythonw* symlinks are no longer installed anywhere.

Python now uses SipHash24 on all major platforms.

Now './configure --silent && make -s' doesn't print any message to stdout or stderr.

when building _tkinter.  configure has two new options; if used, both must
be specified:

  ./configure \
      --with-tcltk-includes="-I/opt/local/include" \
      --with-tcltk-libs="-L/opt/local/lib -ltcl8.5 -ltk8.5"

In addition, the options can be overridden with make:

   make \
       TCLTK_INCLUDES="-I/opt/local/include" \
       TCLTK_LIBS="-L/opt/local/lib -ltcl8.6 -ltk8.6"

prlimit() is a Linux specific command that combines setrlimit, getrlimit and can set the limit
of other processes.

    1. ppc arch detection for extension module builds broke with Xcode 5
    2. ppc arch detection in configure did not work on OS X 10.4
    3. -sysroot and -arch flags were unnecessarily duplicated
    4. there was no obvious way to configure an intel-32 only build.

when building _tkinter.  configure has two new options; if used, both must
be specified:

  ./configure \
      --with-tcltk-includes="-I/opt/local/include" \
      --with-tcltk-libs="-L/opt/local/lib -ltcl8.5 -ltk8.5"

In addition, the options can be overridden with make:

   make \
       TCLTK_INCLUDES="-I/opt/local/include" \
       TCLTK_LIBS="-L/opt/local/lib -ltcl8.6 -ltk8.6"

are now created non-inheritable; add functions os.get/set_inheritable(),
os.get/set_handle_inheritable() and socket.socket.get/set_inheritable().

Do we need a fallback implementation of getcwd() from 1991 that claims to
support "really old Unix systems"? I don't think so.

A pthread_atfork() child handler is used to seeded the PRNG with pid, time
and some stack data.

Patch by Ronald Oussoren

wmemcmp() is twice faster than a dummy loop (342 usec vs 744 usec) on Fedora
18/x86_64, GCC 4.7.2.

  two makefile macros SHLIB_SUFFIX and EXT_SUFFIX. SO now has the value of
  SHLIB_SUFFIX again (as in 2.x and 3.1). The SO macro is removed in 3.4.

Thorne.

  the package.