如何告诉distutils使用gcc？ [英] How to tell distutils to use gcc?

问题描述

我想用Cython包装一个包含C ++和OpenMP代码的测试项目，并通过 setup.py 文件用distutils构建它。我的文件内容如下：

 从distutils.core导入安装
从distutils.extension import Extension 
来自Cython.Build import cythonize 
来自Cython.Distutils import build_ext 
 
 
 modules = [Extension（Interface，
 [Interface.pyx ，Parallel.cpp]，
 language =c ++，
 extra_compile_args = [ -  fopenmp]，
 extra_link_args = [ -  fopenmp]）] 
 b $ b for e in modules：
 e.cython_directives = {embedsignature：True} 
 
 setup（name =Interface，
 cmdclass = {build_ext： build_ext}，
 ext_modules = modules）
  

-fopenmp 标志与gcc一起使用来编译和链接到OpenMP。但是，如果我只是调用

  cls〜/ workspace / CythonOpenMP / src $ python3 setup.py build 
  

此标记无法识别，因为编译器是clang：

 运行build 
运行build_ext 
跳过'Interface.cpp'Cython扩展（最新）
构建'接口'扩展
 -Wno-unused-result -fno-common -dynamic -DNDEBUG -g -O3 -Wall -Wstrict-prototypes -I / usr / local / include -I / usr / local / opt / sqlite / include -I / usr / local /Cellar/python3/3.3.0/Frameworks/Python.framework/Versions/3.3/include/python3.3m -c Interface.cpp -o build / temp.macosx-10.8-x86_64-3.3 / Interface.o -fopenmp 
 clang：warning：编译期间未使用的参数：'-fopenmp'
 cc -Wno-unused-result -fno-common -dynamic -DNDEBUG -g -O3 -Wall -Wstrict-prototypes -I / usr / local / include -I / usr / local / opt / sqlite / include -I / usr / local / Cellar / python3 / 3.3.0 / Frameworks / Python.framework / Versions / 3.3 / include / python3.3m -c Parallel.cpp  - o build / temp.macosx-10.8-x86_64-3.3 / Parallel.o -fopenmp 
 clang：warning：参数在编译期间未使用：'-fopenmp'
 Parallel.cpp：24：10：warning：unknown pragma ignored [-Wunknown-pragmas] 
 #pragma omp parallel for 
 ^ 
 1生成警告。 
 c ++ -bundle -undefined dynamic_lookup -L / usr / local / lib -L ​​/ usr / local / opt / sqlite / lib build / temp.macosx-10.8-x86_64-3.3 / Interface.o build / temp.macosx -10.8-x86_64-3.3 / Parallel.o -o build / lib.macosx-10.8-x86_64-3.3 / Interface.so -fopenmp 
 ld：没有为-lgomp 
找到库clang：error：linker命令失败，退出代码1（使用-v查看调用）
错误：命令'c ++'失败退出状态1 
  

我已经失败地尝试指定gcc：

  cls〜/ workspace / CythonOpenMP / src $ python3 setup.py build --compiler = g ++  -  4.7 
运行build 
运行build_ext 
错误：不知道如何在平台'posix'上编译C / C ++代码'g ++  - 4.7'编译器
  

如何告诉distutils使用gcc？

$

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I want to wrap a test project containing C++ and OpenMP code with Cython, and build it with distutils via a setup.py file. The content of my file looks like this:

from distutils.core import setup
from distutils.extension import Extension
from Cython.Build import cythonize
from Cython.Distutils import build_ext


modules = [Extension("Interface",
                     ["Interface.pyx", "Parallel.cpp"],
                     language = "c++",
                     extra_compile_args=["-fopenmp"],
                     extra_link_args=["-fopenmp"])]

for e in modules:
    e.cython_directives = {"embedsignature" : True}

setup(name="Interface",
     cmdclass={"build_ext": build_ext},
     ext_modules=modules)

The -fopenmp flag is used with gcc to compile and link against OpenMP. However, if I just invoke

cls ~/workspace/CythonOpenMP/src $ python3 setup.py build

this flag is not recognized, because the compiler is clang:

running build
running build_ext
skipping 'Interface.cpp' Cython extension (up-to-date)
building 'Interface' extension
cc -Wno-unused-result -fno-common -dynamic -DNDEBUG -g -O3 -Wall -Wstrict-prototypes -I/usr/local/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python3/3.3.0/Frameworks/Python.framework/Versions/3.3/include/python3.3m -c Interface.cpp -o build/temp.macosx-10.8-x86_64-3.3/Interface.o -fopenmp
clang: warning: argument unused during compilation: '-fopenmp'
cc -Wno-unused-result -fno-common -dynamic -DNDEBUG -g -O3 -Wall -Wstrict-prototypes -I/usr/local/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python3/3.3.0/Frameworks/Python.framework/Versions/3.3/include/python3.3m -c Parallel.cpp -o build/temp.macosx-10.8-x86_64-3.3/Parallel.o -fopenmp
clang: warning: argument unused during compilation: '-fopenmp'
Parallel.cpp:24:10: warning: unknown pragma ignored [-Wunknown-pragmas]
        #pragma omp parallel for
                ^
1 warning generated.
c++ -bundle -undefined dynamic_lookup -L/usr/local/lib -L/usr/local/opt/sqlite/lib build/temp.macosx-10.8-x86_64-3.3/Interface.o build/temp.macosx-10.8-x86_64-3.3/Parallel.o -o build/lib.macosx-10.8-x86_64-3.3/Interface.so -fopenmp
ld: library not found for -lgomp
clang: error: linker command failed with exit code 1 (use -v to see invocation)
error: command 'c++' failed with exit status 1

I've unsucessfully tried to specify gcc:

cls ~/workspace/CythonOpenMP/src $ python3 setup.py build --compiler=g++-4.7
running build
running build_ext
error: don't know how to compile C/C++ code on platform 'posix' with 'g++-4.7' compiler

How can I tell distutils to use gcc?

解决方案

Try setting the "CC" environment variable from inside the setup.py with os.environ.

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