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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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00dc514612
The -Wcast-function-type-mismatch option was introduced in clang 19 and its enabled by default, since we use -Werror, and python bindings do casts that are valid but trips this warning, disable it if present. Closes: https://lore.kernel.org/all/CA+icZUXoJ6BS3GMhJHV3aZWyb5Cz2haFneX0C5pUMUUhG-UVKQ@mail.gmail.com Reported-by: Sedat Dilek <sedat.dilek@gmail.com> Tested-by: Sedat Dilek <sedat.dilek@gmail.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: stable@vger.kernel.org # To allow building with the upcoming clang 19 Link: https://lore.kernel.org/lkml/CA+icZUVtHn8X1Tb_Y__c-WswsO0K8U9uy3r2MzKXwTA5THtL7w@mail.gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
93 lines
3.7 KiB
Python
93 lines
3.7 KiB
Python
from os import getenv, path
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from subprocess import Popen, PIPE
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from re import sub
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cc = getenv("CC")
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# Check if CC has options, as is the case in yocto, where it uses CC="cc --sysroot..."
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cc_tokens = cc.split()
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if len(cc_tokens) > 1:
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cc = cc_tokens[0]
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cc_options = " ".join([str(e) for e in cc_tokens[1:]]) + " "
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else:
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cc_options = ""
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cc_is_clang = b"clang version" in Popen([cc, "-v"], stderr=PIPE).stderr.readline()
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src_feature_tests = getenv('srctree') + '/tools/build/feature'
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def clang_has_option(option):
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cc_output = Popen([cc, cc_options + option, path.join(src_feature_tests, "test-hello.c") ], stderr=PIPE).stderr.readlines()
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return [o for o in cc_output if ((b"unknown argument" in o) or (b"is not supported" in o) or (b"unknown warning option" in o))] == [ ]
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if cc_is_clang:
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from sysconfig import get_config_vars
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vars = get_config_vars()
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for var in ('CFLAGS', 'OPT'):
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vars[var] = sub("-specs=[^ ]+", "", vars[var])
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if not clang_has_option("-mcet"):
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vars[var] = sub("-mcet", "", vars[var])
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if not clang_has_option("-fcf-protection"):
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vars[var] = sub("-fcf-protection", "", vars[var])
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if not clang_has_option("-fstack-clash-protection"):
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vars[var] = sub("-fstack-clash-protection", "", vars[var])
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if not clang_has_option("-fstack-protector-strong"):
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vars[var] = sub("-fstack-protector-strong", "", vars[var])
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if not clang_has_option("-fno-semantic-interposition"):
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vars[var] = sub("-fno-semantic-interposition", "", vars[var])
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if not clang_has_option("-ffat-lto-objects"):
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vars[var] = sub("-ffat-lto-objects", "", vars[var])
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if not clang_has_option("-ftree-loop-distribute-patterns"):
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vars[var] = sub("-ftree-loop-distribute-patterns", "", vars[var])
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if not clang_has_option("-gno-variable-location-views"):
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vars[var] = sub("-gno-variable-location-views", "", vars[var])
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from setuptools import setup, Extension
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from setuptools.command.build_ext import build_ext as _build_ext
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from setuptools.command.install_lib import install_lib as _install_lib
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class build_ext(_build_ext):
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def finalize_options(self):
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_build_ext.finalize_options(self)
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self.build_lib = build_lib
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self.build_temp = build_tmp
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class install_lib(_install_lib):
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def finalize_options(self):
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_install_lib.finalize_options(self)
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self.build_dir = build_lib
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cflags = getenv('CFLAGS', '').split()
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# switch off several checks (need to be at the end of cflags list)
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cflags += ['-fno-strict-aliasing', '-Wno-write-strings', '-Wno-unused-parameter', '-Wno-redundant-decls' ]
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if cc_is_clang:
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cflags += ["-Wno-unused-command-line-argument" ]
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if clang_has_option("-Wno-cast-function-type-mismatch"):
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cflags += ["-Wno-cast-function-type-mismatch" ]
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else:
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cflags += ['-Wno-cast-function-type' ]
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# The python headers have mixed code with declarations (decls after asserts, for instance)
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cflags += [ "-Wno-declaration-after-statement" ]
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src_perf = getenv('srctree') + '/tools/perf'
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build_lib = getenv('PYTHON_EXTBUILD_LIB')
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build_tmp = getenv('PYTHON_EXTBUILD_TMP')
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perf = Extension('perf',
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sources = [ src_perf + '/util/python.c' ],
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include_dirs = ['util/include'],
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extra_compile_args = cflags,
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)
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setup(name='perf',
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version='0.1',
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description='Interface with the Linux profiling infrastructure',
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author='Arnaldo Carvalho de Melo',
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author_email='acme@redhat.com',
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license='GPLv2',
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url='http://perf.wiki.kernel.org',
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ext_modules=[perf],
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cmdclass={'build_ext': build_ext, 'install_lib': install_lib})
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