Python and c++11 for swig : 如何启用 c++11

Question

我正在尝试使用 swig 与 python 一起使用共享库。我对 C++ 的实验不是很深入，但我已经用一个简单的对象（在 C++ 中）进行了第一次测试，而且效果很好。

现在我试着让它与一个更大的项目一起工作，该项目已经在 Linux（和 Windows）下编译。但是我做不到。

这是我的尝试：

我的 CMakeLists for Swig :

project(elecswig)

include_directories(${COREALPI_DIR}/include)
include_directories(/usr/include/c++/4.9)

find_package(SWIG REQUIRED)
include(${SWIG_USE_FILE})
if (NOT MSVC)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
endif()

find_package(PythonLibs)
include_directories(${PYTHON_INCLUDE_PATH})

set_source_files_properties(src/elec.i PROPERTIES CPLUSPLUS ON)
set_source_files_properties(src/elec.i PROPERTIES SWIG_FLAGS "-includeall")

link_directories(${COREALPI_LIBRARY})

swig_add_module(elecswig python src/elec.i)

swig_link_libraries(elecswig
    ${PYTHON_LIBRARIES}
    elec
)

还有我的 elec.i Swig，他用命名空间调用 .h：

#define __linux__ 1
#define __GNUC__ 4

%module elecswig
%{
    #include "ca/elec/model/modelvoltagedrop.h"
%}

%include "ca/elec/model/modelvoltagedrop.h"

当我尝试编译以获取我的 Python Lybrary 时，出现以下错误：

/usr/include/c++/4.9/bits/c++0x_warning.h:32: Error: CPP #error "This file requires compiler and library support for the \
ISO C++ 2011 standard. This support is currently experimental, and must be \
enabled with the -std=c++11 or -std=gnu++11 compiler options.". Use the -cpperraswarn option to continue swig processing.
/usr/include/c++/4.9/cstring:41: Error: Unable to find 'bits/c++config.h'
/usr/include/c++/4.9/string:38: Error: Unable to find 'bits/c++config.h'
/usr/include/c++/4.9/bits/stringfwd.h:39: Error: Unable to find 'bits/c++config.h'
/usr/include/c++/4.9/bits/memoryfwd.h:48: Error: Unable to find 'bits/c++config.h'
/usr/include/c++/4.9/bits/stl_algobase.h:59: Error: Unable to find 'bits/c++config.h'
/usr/include/c++/4.9/bits/functexcept.h:39: Error: Unable to find 'bits/c++config.h'
/usr/include/c++/4.9/bits/cpp_type_traits.h:37: Error: Unable to find 'bits/c++config.h'
/usr/include/c++/4.9/ext/type_traits.h:34: Error: Unable to find 'bits/c++config.h'
/usr/include/c++/4.9/bits/move.h:33: Error: Unable to find 'bits/c++config.h'
/usr/include/c++/4.9/bits/concept_check.h:35: Error: Unable to find 'bits/c++config.h'
/usr/include/c++/4.9/bits/stl_iterator_base_types.h:64: Error: Unable to find 'bits/c++config.h'
/usr/include/c++/4.9/cwchar:41: Error: Unable to find 'bits/c++config.h'
/usr/include/c++/4.9/bits/allocator.h:46: Error: Unable to find 'bits/c++allocator.h'
/usr/include/c++/4.9/bits/localefwd.h:39: Error: Unable to find 'bits/c++config.h'
/usr/include/c++/4.9/bits/localefwd.h:40: Error: Unable to find 'bits/c++locale.h'
/usr/include/c++/4.9/iosfwd:38: Error: Unable to find 'bits/c++config.h'
/usr/include/c++/4.9/cctype:41: Error: Unable to find 'bits/c++config.h'
[...]
/usr/include/c++/4.9/cstdlib:41: Error: Unable to find 'bits/c++config.h'
/usr/include/c++/4.9/utility:68: Error: Unable to find 'bits/c++config.h'
/usr/include/c++/4.9/ctime:41: Error: Unable to find 'bits/c++config.h'
/usr/include/c++/4.9/ctime:42: Error: Unable to find 'time.h'
/usr/include/c++/4.9/iomanip:38: Error: Unable to find 'bits/c++config.h'
/usr/include/c++/4.9/numeric:60: Error: Unable to find 'bits/c++config.h'
elecswig/CMakeFiles/_elecswig.dir/build.make:53: recipe for target 'elecswig/elecPYTHON_wrap.cxx' failed
make[2]: *** [elecswig/elecPYTHON_wrap.cxx] Error 1
CMakeFiles/Makefile2:75: recipe for target 'elecswig/CMakeFiles/_elecswig.dir/all' failed
make[1]: *** [elecswig/CMakeFiles/_elecswig.dir/all] Error 2
Makefile:75: recipe for target 'all' failed
make: *** [all] Error 2

貌似他找的不多files.h不过我大部分都是c++11的错误

我试图在 CMake 中设置标志，但似乎没有任何改变。

如果你能帮助我，好吗？

如果需要，我可以提供更多信息。

谢谢

Answer 1

经过几个小时的测试，我找到了它不工作的原因。在 CMakeLists 中：

set_source_files_properties(src/elec.i PROPERTIES SWIG_FLAGS "-includeall")

包括所有库和依赖项，无论如何编译器使用。如果你有 2 个版本的 libstdc++ 和 gcc/g++，他似乎找不到好的库来 link / 使用。

如果我删除它，CMake 会完成这项工作。我没有更多 unable to find 或 c++11 问题。

我必须使用 g++-5 来让它工作（4.9 似乎缺少 c++11 的一些功能）并添加好的命名空间和包含。

现在我可以访问 Python 中的共享库了。

Answer 2

备案，回答post标题中提出的问题（与原作者实际遇到的问题不同）：

使用此声明而不是设置 CMAKE_CXX_FLAGS:

set_property(TARGET ${SWIG_MODULE_elecswig_REAL_NAME} PROPERTY CXX_STANDARD_REQUIRED 11)

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