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setuptools already uses CFLAGS. Passing CFLAGS with additional flags as extra compile arguments causes CFLAGS to effectively get passed twice: $ make -C tools/perf V=1 JOBS=1 ... building 'perf' extension gcc [CFLAGS] -fPIC -Iutil/include -I/usr/include/python3.14 \ -c /root/linux/tools/perf/util/python.c \ -o python_ext_build/tmp/root/linux/tools/perf/util/python.o \ [CFLAGS] \ -fno-strict-aliasing -Wno-write-strings -Wno-unused-parameter \ -Wno-redundant-decls -Wno-cast-function-type \ -Wno-declaration-after-statement Reviewed-by: James Clark <james.clark@linaro.org> Signed-off-by: Jens Remus <jremus@linux.ibm.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Hendrik Brueckner <brueckner@linux.ibm.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jan Polensky <japo@linux.ibm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
108 lines
4.1 KiB
Python
108 lines
4.1 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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import shlex
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cc = getenv("CC")
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assert cc, "Environment variable CC not set"
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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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# ignore optional stderr could be None as it is set to PIPE to avoid that.
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# mypy: disable-error-code="union-attr"
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cc_is_clang = b"clang version" in Popen([cc, "-v"], stderr=PIPE).stderr.readline()
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srctree = getenv('srctree')
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assert srctree, "Environment variable srctree, for the Linux sources, not set"
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src_feature_tests = f'{srctree}/tools/build/feature'
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def clang_has_option(option):
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error_substrings = (
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b"unknown argument",
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b"is not supported",
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b"unknown warning option"
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)
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cmd = shlex.split(f"{cc} {cc_options} {option}") + [
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"-o", "/dev/null",
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path.join(src_feature_tests, "test-hello.c")
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]
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cc_output = Popen(cmd, stderr=PIPE).stderr.readlines()
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return not any(any(error in line for error in error_substrings) for line in cc_output)
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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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# switch off several checks (need to be at the end of cflags list)
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extra_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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extra_cflags += ["-Wno-unused-command-line-argument" ]
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if clang_has_option("-Wno-cast-function-type-mismatch"):
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extra_cflags += ["-Wno-cast-function-type-mismatch" ]
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else:
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extra_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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extra_cflags += [ "-Wno-declaration-after-statement" ]
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src_perf = f'{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 = extra_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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