from os import getenvfrom subprocess import Popen, PIPEfrom re import sub def clang_has_option(option):    return [o for o in Popen(['clang', option], stderr=PIPE).stderr.readlines() if b"unknown argument" in o] == [ ] cc = getenv("CC")if cc == "clang":    from distutils.sysconfig import get_config_vars    vars = get_config_vars()    for var in ('CFLAGS', 'OPT'):        vars[var] = sub("-specs=[^ ]+", "", vars[var])        if not clang_has_option("-mcet"):            vars[var] = sub("-mcet", "", vars[var])        if not clang_has_option("-fcf-protection"):            vars[var] = sub("-fcf-protection", "", vars[var])        if not clang_has_option("-fstack-clash-protection"):            vars[var] = sub("-fstack-clash-protection", "", vars[var]) from distutils.core import setup, Extension from distutils.command.build_ext   import build_ext   as _build_extfrom distutils.command.install_lib import install_lib as _install_lib class build_ext(_build_ext):    def finalize_options(self):        _build_ext.finalize_options(self)        self.build_lib  = build_lib        self.build_temp = build_tmp class install_lib(_install_lib):    def finalize_options(self):        _install_lib.finalize_options(self)        self.build_dir = build_lib  cflags = getenv('CFLAGS', '').split()# switch off several checks (need to be at the end of cflags list)cflags += ['-fno-strict-aliasing', '-Wno-write-strings', '-Wno-unused-parameter', '-Wno-redundant-decls' ]if cc != "clang":    cflags += ['-Wno-cast-function-type' ] src_perf  = getenv('srctree') + '/tools/perf'build_lib = getenv('PYTHON_EXTBUILD_LIB')build_tmp = getenv('PYTHON_EXTBUILD_TMP')libtraceevent = getenv('LIBTRACEEVENT')libapikfs = getenv('LIBAPI') ext_sources = [f.strip() for f in open('util/python-ext-sources')				if len(f.strip()) > 0 and f[0] != '#'] # use full paths with source filesext_sources = list(map(lambda x: '%s/%s' % (src_perf, x) , ext_sources)) extra_libraries = []if '-DHAVE_LIBNUMA_SUPPORT' in cflags:    extra_libraries = [ 'numa' ] perf = Extension('perf',		  sources = ext_sources,		  include_dirs = ['util/include'],		  libraries = extra_libraries,		  extra_compile_args = cflags,		  extra_objects = [libtraceevent, libapikfs],                 ) setup(name='perf',      version='0.1',      description='Interface with the Linux profiling infrastructure',      author='Arnaldo Carvalho de Melo',      author_email='acme@redhat.com',      license='GPLv2',      url='http://perf.wiki.kernel.org',      ext_modules=[perf],      cmdclass={'build_ext': build_ext, 'install_lib': install_lib})