clang:错误:未知参数:'-mno-fused-madd' [-Wunused-command-line-argument-hard-error-in-future] [英] clang: error: unknown argument: '-mno-fused-madd' [-Wunused-command-line-argument-hard-error-in-future]
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问题描述
我在尝试在 Mavericks 操作系统中安装 Scrapy 时遇到以下错误.
我安装了命令行工具和 X11 我真的不知道发生了什么，我在浏览 Web 时也没有发现同样的错误.我认为这可能与 Xcode 5.1 的一些变化有关
感谢您的回答！
这是命令输出的一部分:
$pip 安装scrapy
<小时><预><代码>....下载/解包密码学>=0.2.1(来自pyOpenSSL->scrapy)下载 cryptography-0.3.tar.gz (208kB): 下载了 208kB为包加密运行 setup.py egg_infoOS/X:'cc' 与 'gcc' 之间的混淆(见 issue 123)不会在 C 代码中使用__thread"clang:错误:未知参数:'-mno-fused-madd' [-Wunused-command-line-argument-hard-error-in-future]clang:注意:这将是一个硬错误(不能降级为警告)在未来回溯(最近一次调用最后一次):文件<string>"，第 16 行，在 <module> 中<小时>
解决方案
这是由于 Xcode 5.1 中的 clang 默认值发生了变化而 Apple 没有注意到它会中断扩展模块使用系统 Python 构建.一种解决方法是先定义以下环境变量:
export CFLAGS=-Qunused-arguments出口 CPPFLAGS=-Qunused-arguments更新 [2014-05-16]:正如预期的那样，Apple 已经通过 OS X 10.9.3 中更新的系统 Python(2.7、2.6 和 2.5)修复了这个问题，因此解决方法是没有使用最新的 Mavericks 和 Xcode 5.1+ 时不再需要.但是，截至目前，如果您在那里使用 Xcode 5.1+，OS X 10.8.x(Mountain Lion，目前为 10.8.5)仍然需要解决方法.
I get the following error trying to install Scrapy in a Mavericks OS.
I have command line tools and X11 installed I don't really know whats going on and I haven`t found the same error browsing through the Web. I think it might be related to some change in Xcode 5.1
Thanks for the answers!
this is part of the command output:
$pip install scrapy
.
.
.
.
Downloading/unpacking cryptography>=0.2.1 (from pyOpenSSL->scrapy)
Downloading cryptography-0.3.tar.gz (208kB): 208kB downloaded
Running setup.py egg_info for package cryptography
OS/X: confusion between 'cc' versus 'gcc' (see issue 123)
will not use '__thread' in the C code
clang: error: unknown argument: '-mno-fused-madd' [-Wunused-command-line-argument-hard-error-in-future]
clang: note: this will be a hard error (cannot be downgraded to a warning) in the future
Traceback (most recent call last):
File "<string>", line 16, in <module>
File "/Users/agonzamart/.virtualenvs/Parser/build/cryptography/setup.py", line 156, in <module>
"test": PyTest,
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/core.py", line 112, in setup
_setup_distribution = dist = klass(attrs)
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/setuptools/dist.py", line 265, in __init__
self.fetch_build_eggs(attrs.pop('setup_requires'))
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/setuptools/dist.py", line 289, in fetch_build_eggs
parse_requirements(requires), installer=self.fetch_build_egg
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/pkg_resources.py", line 618, in resolve
dist = best[req.key] = env.best_match(req, self, installer)
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/pkg_resources.py", line 862, in best_match
return self.obtain(req, installer) # try and download/install
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/pkg_resources.py", line 874, in obtain
return installer(requirement)
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/setuptools/dist.py", line 339, in fetch_build_egg
return cmd.easy_install(req)
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 623, in easy_install
return self.install_item(spec, dist.location, tmpdir, deps)
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 653, in install_item
dists = self.install_eggs(spec, download, tmpdir)
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 849, in install_eggs
return self.build_and_install(setup_script, setup_base)
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 1130, in build_and_install
self.run_setup(setup_script, setup_base, args)
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 1118, in run_setup
raise DistutilsError("Setup script exited with %s" % (v.args[0],))
distutils.errors.DistutilsError: Setup script exited with error: command 'cc' failed with exit status 1
Complete output from command python setup.py egg_info:
OS/X: confusion between 'cc' versus 'gcc' (see issue 123)
will not use '__thread' in the C code
clang: error: unknown argument: '-mno-fused-madd' [-Wunused-command-line-argument-hard-error-in-future]
clang: note: this will be a hard error (cannot be downgraded to a warning) in the future
Traceback (most recent call last):
File "<string>", line 16, in <module>
File "/Users/agonzamart/.virtualenvs/Parser/build/cryptography/setup.py", line 156, in <module>
"test": PyTest,
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/core.py", line 112, in setup
_setup_distribution = dist = klass(attrs)
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/setuptools/dist.py", line 265, in __init__
self.fetch_build_eggs(attrs.pop('setup_requires'))
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/setuptools/dist.py", line 289, in fetch_build_eggs
parse_requirements(requires), installer=self.fetch_build_egg
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/pkg_resources.py", line 618, in resolve
dist = best[req.key] = env.best_match(req, self, installer)
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/pkg_resources.py", line 862, in best_match
return self.obtain(req, installer) # try and download/install
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/pkg_resources.py", line 874, in obtain
return installer(requirement)
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/setuptools/dist.py", line 339, in fetch_build_egg
return cmd.easy_install(req)
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 623, in easy_install
return self.install_item(spec, dist.location, tmpdir, deps)
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 653, in install_item
dists = self.install_eggs(spec, download, tmpdir)
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 849, in install_eggs
return self.build_and_install(setup_script, setup_base)
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 1130, in build_and_install
self.run_setup(setup_script, setup_base, args)
File "/Users/agonzamart/.virtualenvs/Parser/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 1118, in run_setup
raise DistutilsError("Setup script exited with %s" % (v.args[0],))
distutils.errors.DistutilsError: Setup script exited with error: command 'cc' failed with exit status 1
----------------------------------------
Cleaning up...
Command python setup.py egg_info failed with error code 1 in /Users/agonzamart/.virtualenvs/Parser/build/cryptography
解决方案
It is due to a change in clang defaults in Xcode 5.1 and Apple not noticing that it would break extension module builds using the system Python. One workaround is to define the following environment variables first:
export CFLAGS=-Qunused-arguments
export CPPFLAGS=-Qunused-arguments
UPDATE [2014-05-16]: As expected, Apple has fixed this problem with updated system Pythons (2.7, 2.6, and 2.5) in OS X 10.9.3 so the workaround is no longer necessary when using the latest Mavericks and Xcode 5.1+. However, as of now, the workaround is still required for OS X 10.8.x (Mountain Lion, currently 10.8.5) if you are using Xcode 5.1+ there.
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