Adding cython v0.20.2 in third-party.

third_party/cython/src/Cython/Build/BuildExecutable.py

Index: third_party/cython/src/Cython/Build/BuildExecutable.py
diff --git a/third_party/cython/src/Cython/Build/BuildExecutable.py b/third_party/cython/src/Cython/Build/BuildExecutable.py
new file mode 100644
index 0000000000000000000000000000000000000000..6df3135ec1f00de436a4ab12aea69b94a0af3019
--- /dev/null
+++ b/third_party/cython/src/Cython/Build/BuildExecutable.py
@@ -0,0 +1,139 @@
+"""
+Compile a Python script into an executable that embeds CPython and run it.
+Requires CPython to be built as a shared library ('libpythonX.Y').
+
+Basic usage:
+
+    python cythonrun somefile.py [ARGS]
+"""
+
+DEBUG = True
+
+import sys
+import os
+from distutils import sysconfig
+
+def get_config_var(name, default=''):
+    return sysconfig.get_config_var(name) or default
+
+INCDIR = sysconfig.get_python_inc()
+LIBDIR1 = get_config_var('LIBDIR')
+LIBDIR2 = get_config_var('LIBPL')
+PYLIB = get_config_var('LIBRARY')
+PYLIB_DYN = get_config_var('LDLIBRARY')
+if PYLIB_DYN == PYLIB:
+    # no shared library
+    PYLIB_DYN = ''
+else:
+    PYLIB_DYN = os.path.splitext(PYLIB_DYN[3:])[0] # 'lib(XYZ).so' -> XYZ
+
+CC = get_config_var('CC', os.environ.get('CC', ''))
+CFLAGS = get_config_var('CFLAGS') + ' ' + os.environ.get('CFLAGS', '')
+LINKCC = get_config_var('LINKCC', os.environ.get('LINKCC', CC))
+LINKFORSHARED = get_config_var('LINKFORSHARED')
+LIBS = get_config_var('LIBS')
+SYSLIBS = get_config_var('SYSLIBS')
+EXE_EXT = sysconfig.get_config_var('EXE')
+
+def _debug(msg, *args):
+    if DEBUG:
+        if args:
+            msg = msg % args
+        sys.stderr.write(msg + '\n')
+
+def dump_config():
+    _debug('INCDIR: %s', INCDIR)
+    _debug('LIBDIR1: %s', LIBDIR1)
+    _debug('LIBDIR2: %s', LIBDIR2)
+    _debug('PYLIB: %s', PYLIB)
+    _debug('PYLIB_DYN: %s', PYLIB_DYN)
+    _debug('CC: %s', CC)
+    _debug('CFLAGS: %s', CFLAGS)
+    _debug('LINKCC: %s', LINKCC)
+    _debug('LINKFORSHARED: %s', LINKFORSHARED)
+    _debug('LIBS: %s', LIBS)
+    _debug('SYSLIBS: %s', SYSLIBS)
+    _debug('EXE_EXT: %s', EXE_EXT)
+
+def runcmd(cmd, shell=True):
+    if shell:
+        cmd = ' '.join(cmd)
+        _debug(cmd)
+    else:
+        _debug(' '.join(cmd))
+
+    try:
+        import subprocess
+    except ImportError: # Python 2.3 ...
+        returncode = os.system(cmd)
+    else:
+        returncode = subprocess.call(cmd, shell=shell)
+    
+    if returncode:
+        sys.exit(returncode)
+
+def clink(basename):
+    runcmd([LINKCC, '-o', basename + EXE_EXT, basename+'.o', '-L'+LIBDIR1, '-L'+LIBDIR2]
+           + [PYLIB_DYN and ('-l'+PYLIB_DYN) or os.path.join(LIBDIR1, PYLIB)]
+           + LIBS.split() + SYSLIBS.split() + LINKFORSHARED.split())
+
+def ccompile(basename):
+    runcmd([CC, '-c', '-o', basename+'.o', basename+'.c', '-I' + INCDIR] + CFLAGS.split())
+
+def cycompile(input_file, options=()):
+    from Cython.Compiler import Version, CmdLine, Main
+    options, sources = CmdLine.parse_command_line(list(options or ()) + ['--embed', input_file])
+    _debug('Using Cython %s to compile %s', Version.version, input_file)
+    result = Main.compile(sources, options)
+    if result.num_errors > 0:
+        sys.exit(1)
+
+def exec_file(program_name, args=()):
+    runcmd([os.path.abspath(program_name)] + list(args), shell=False)
+
+def build(input_file, compiler_args=(), force=False):
+    """
+    Build an executable program from a Cython module.
+
+    Returns the name of the executable file.
+    """
+    basename = os.path.splitext(input_file)[0]
+    exe_file = basename + EXE_EXT
+    if not force and os.path.abspath(exe_file) == os.path.abspath(input_file):
+        raise ValueError("Input and output file names are the same, refusing to overwrite")
+    if (not force and os.path.exists(exe_file) and os.path.exists(input_file)
+        and os.path.getmtime(input_file) <= os.path.getmtime(exe_file)):
+        _debug("File is up to date, not regenerating %s", exe_file)
+        return exe_file
+    cycompile(input_file, compiler_args)
+    ccompile(basename)
+    clink(basename)
+    return exe_file
+
+def build_and_run(args):
+    """
+    Build an executable program from a Cython module and runs it.
+
+    Arguments after the module name will be passed verbatimely to the
+    program.
+    """
+    cy_args = []
+    last_arg = None
+    for i, arg in enumerate(args):
+        if arg.startswith('-'):
+            cy_args.append(arg)
+        elif last_arg in ('-X', '--directive'):
+            cy_args.append(arg)
+        else:
+            input_file = arg
+            args = args[i+1:]
+            break
+        last_arg = arg
+    else:
+        raise ValueError('no input file provided')
+
+    program_name = build(input_file, cy_args)
+    exec_file(program_name, args)
+
+if __name__ == '__main__':
+    build_and_run(sys.argv[1:])