We know from past benchmarks that most of the time is in compile.

Don't continue on `if $CC == tcc` -> instead put actions that are not
appropriate for `tcc -O2` under `if $CC != tcc`. We will add other
actions to that loop - that's the reason.

In preparation to add pystone_pyx.pyx

Cython is currently slow:

	name                time/op
	pycompile+pyimport  13.0ms ± 0%
	pyimport            12.0ms ± 0%
	cython/py            983ms ± 1%

We mesure time, not operations per second.

In preparation to add pystone_pyx.pyx

In preparation that in addition to pystone.pt there will be also
pystone_pyx.pyx with type annotations.

pystone can say, e.g. "this machine benchmarks at 1.85343e+06 pystones"

It is close to gcc.

Previously it was failing with master:

(neo) (z-dev) (g.env) kirr@deco:~/src/tools/py/cython/t/compilebench$ ./doit.sh
/home/kirr/src/tools/py/cython/Cython/Compiler/Main.py:344: FutureWarning: Cython directive 'language_level' not set, using '3str' for now (Py3). This has changed from earlier releases! File: /home/kirr/src/tools/py/cython/t/compilebench/pystone_pyxtest.py
  tree = Parsing.p_module(s, pxd, full_module_name)

Error compiling Cython file:
------------------------------------------------------------
...
TRUE = 1
FALSE = 0

def main(loops=LOOPS):
    benchtime, stones = pystones(loops)
    print "Pystone(%s) time for %d passes = %g" % \
         ^
------------------------------------------------------------

pystone_pyxtest.py:62:10: Syntax error in simple statement list

* master: (280 commits)
  Fix compilation in PyPy.
  Update changelog.
  Revert "Disable "c_api_binop_methods" directive in 0.29.x and provide it only as an enabled forward option."
  Disable "c_api_binop_methods" directive in 0.29.x and provide it only as an enabled forward option.
  Update changelog.
  Use Py_SET_SIZE() and Py_SET_REFCNT() on Python 3.9.0a4 and newer (GH-3639)
  Update changelog.
  Use Py_SET_SIZE() and Py_SET_REFCNT() on Python 3.9.0a4 and newer (GH-3639)
  Limited API updates and cleanup for #2056. GH-3635)
  Update changelog.
  Update changelog.
  Emit an error when typeid() is used outside of C++ mode (GH-3637)
  Fix overflow handling for abs() calls on signed integer types (GH-3634)
  Update changelog.
  Fix overflow handling for abs() calls on signed integer types (GH-3634)
  Fix handling of "no-cpp" test tag for error tests, where "cpp" is already removed from the list of test backends.
  Update changelog.
  Avoid "uninitialised" warnings for sizeof and typeid (GH-3631)
  Emit an error when typeid() is used outside of C++ mode (GH-3637)
  Fix handling of "no-cpp" test tag for error tests, where "cpp" is already removed from the list of test backends.
  ...

Revert "Disable "c_api_binop_methods" directive in 0.29.x and provide it only as an enabled forward option."

This reverts commit 4ac64ddf.

* Add __Pyx_SET_SIZE() function: use Py_SET_SIZE() on Python 3.9.0a4
and newer, or use Py_SIZE() as an l-value on older Python versions.

Py_SIZE() must not be used as an l-value anymore in Python 3.9:
Py_SET_SIZE() must be used instead:

* https://bugs.python.org/issue39573
* https://docs.python.org/dev/c-api/structures.html#c.Py_SET_SIZE

* Add __Pyx_SET_REFCNT() function: use Py_SET_REFCNT() on Python 3.9.0a4
and newer, or use Py_REFCNT() as an l-value on older Python versions.

Py_REFCNT() must not be used as an l-value anymore in Python 3.9:
Py_SET_REFCNT() must be used instead:

* https://bugs.python.org/issue39573
* https://docs.python.org/dev/c-api/structures.html#c.Py_SET_REFCNT

Use it in ModuleNode.generate_usr_dealloc_call():

* Replace ++Py_REFCNT(o) with __Pyx_SET_REFCNT(o, Py_REFCNT(o) + 1)
* Replace --Py_REFCNT(o) with __Pyx_SET_REFCNT(o, Py_REFCNT(o) - 1)

* Add __Pyx_SET_SIZE() function: use Py_SET_SIZE() on Python 3.9.0a4
and newer, or use Py_SIZE() as an l-value on older Python versions.

Py_SIZE() must not be used as an l-value anymore in Python 3.9:
Py_SET_SIZE() must be used instead:

* https://bugs.python.org/issue39573
* https://docs.python.org/dev/c-api/structures.html#c.Py_SET_SIZE

* Add __Pyx_SET_REFCNT() function: use Py_SET_REFCNT() on Python 3.9.0a4
and newer, or use Py_REFCNT() as an l-value on older Python versions.

Py_REFCNT() must not be used as an l-value anymore in Python 3.9:
Py_SET_REFCNT() must be used instead:

* https://bugs.python.org/issue39573
* https://docs.python.org/dev/c-api/structures.html#c.Py_SET_REFCNT

Use it in ModuleNode.generate_usr_dealloc_call():

* Replace ++Py_REFCNT(o) with __Pyx_SET_REFCNT(o, Py_REFCNT(o) + 1)
* Replace --Py_REFCNT(o) with __Pyx_SET_REFCNT(o, Py_REFCNT(o) - 1)

Fixes #1911

Fixes #1911

Fix handling of "no-cpp" test tag for error tests, where "cpp" is already removed from the list of test backends.

Closes #3575

Fix handling of "no-cpp" test tag for error tests, where "cpp" is already removed from the list of test backends.

Closes #3575

Closes https://github.com/cython/cython/issues/3632