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编译错误:` error\u category`未使用g++6.3.0命名类型'

cython c++11 c++

paugier · 技术社区 · 6 年前

我尝试编译这个C++/Python库 https://bitbucket.org/fluiddyn/fluidfft

如果安装了mpi4py,则工作正常。

如果未安装mpi4py,则无法编译不使用MPI的代码。

编译Cython文件时出错。错误很长,从以下开始:

In file included from /usr/include/c++/6/bits/ios_base.h:46:0,
                 from /usr/include/c++/6/ios:42,
                 from /usr/include/c++/6/ostream:38,
                 from /usr/include/c++/6/iostream:39,
                 from src_cpp/base/base_fft.h:10,
                 from fluidfft/fft2d/fft2d_with_fftw1d.cpp:543:
/usr/include/c++/6/system_error:143:31: error: âerror_categoryâ does not name a type
     error_code(int __v, const error_category& __cat) noexcept
                               ^~~~~~~~~~~~~~
/usr/include/c++/6/system_error:152:27: error: âerror_categoryâ does not name a type
     assign(int __v, const error_category& __cat) noexcept
                           ^~~~~~~~~~~~~~
/usr/include/c++/6/system_error:172:11: error: âerror_categoryâ does not name a type
     const error_category&
           ^~~~~~~~~~~~~~
/usr/include/c++/6/system_error:191:11: error: âerror_categoryâ does not name a type
     const error_category*  _M_cat;

[...]

我想这可能是C++11的问题( http://en.cppreference.com/w/cpp/error/error_category )但我不知道如何解决这个问题。

编译命令为

g++ -pthread -fwrapv -O3 -Wall -Wno-unused-result -Wsign-compare -Wno-unused-result -Wsign-compare -fwrapv -O3 -Wall -fPIC -I/home/users/me/opt/miniconda3/include/python3.6m -I/home/users/me/opt/miniconda3/include -Isrc_cy -Ifluidfft/fft2d -Ifluidfft/fft3d -Isrc_cpp/base -Isrc_cpp/3d -Isrc_cpp/2d -Iinclude -I/home/users/me/opt/miniconda3/lib/python3.6/site-packages/numpy/core/include -c fluidfft/fft2d/fft2d_with_fftw1d.cpp -o build/temp.linux-x86_64-3.6/fluidfft/fft2d/fft2d_with_fftw1d.o

编辑最小、完整且可验证的示例

感谢Ashwin Vishnu(参见 https://bitbucket.org/fluiddyn/fluidfft/issues/7/fluidfft-installation-fails-without-mpi4py ),我可以发布一个简单的示例

/* test.cpp */
#include <Python.h>
#include <string.h>
#include <stdio.h>

#include <cpu.h>

#include <sys/time.h>
#include <complex>
#include <iostream>


int main() {
  std::cout<<"Hello world";
  return 0;
}

从fluidfft目录编译如下:

g++ $(python-config --include) -Iinclude/ test.cpp

如果我们注释掉cpu。h包括,没有错误。

文件cpu。h取自pyfftw代码: https://github.com/pyFFTW/pyFFTW/blob/master/include/cpu.h

1 回复 | 直到 6 年前

jadelord 6 年前

发生这种情况的原因是fluidfft包的Cython源文件依赖于 a C++ header file cpu.h 其中,以下预处理器线路导致问题:

#if __STDC_VERSION__ >= 199901L
  /* "inline" is a keyword */
#else
# define inline
#endif

我的猜测是,较新的g++编译器对重新定义保留关键字很严格。以下提示来自 essay on inline functions ,此代码块替换为:

#if __STDC_VERSION__ >= 199901L
  /* "inline" is a keyword */
#else
# define INLINE
#endif

#ifndef INLINE
# if __GNUC__ && !__GNUC_STDC_INLINE__
#  define INLINE static inline
# else
#  define INLINE inline
# endif
#endif