在Cygwin上編譯Boost，標題在32/64位上不一致

Question

我正在嘗試編譯有關Cygwin的最新消息，並且收到大量這樣的警告：

...failed gcc.compile.c++ bin.v2/libs/python/build/gcc-4.9.2/release/link-static/threading-multi/object_protocol.o...
gcc.compile.c++ bin.v2/libs/python/build/gcc-4.9.2/release/link-static/threading-multi/object_operators.o
In file included from ./boost/python/detail/prefix.hpp:13:0,
                 from ./boost/python/object_operators.hpp:8,
                 from libs\python\src\object_operators.cpp:6:
./boost/python/detail/wrap_python.hpp:88:0: warning: "SIZEOF_LONG" redefined
 #  define SIZEOF_LONG 4
 ^
In file included from ./boost/python/detail/wrap_python.hpp:50:0,
                 from ./boost/python/detail/prefix.hpp:13,
                 from ./boost/python/object_operators.hpp:8,
                 from libs\python\src\object_operators.cpp:6:
/usr/include/python2.7/pyconfig.h:1013:0: note: this is the location of the previous definition
 #define SIZEOF_LONG 8

我使用的是64位系統。 pyconfig.h正確，long的大小應為8。boost中的wrap_python.hpp有錯誤。

我查看了wrap_python.hpp並發現了這一點：

//
// Some things we need in order to get Python.h to work with compilers other
// than MSVC on Win32
//
#if defined(_WIN32) || defined(__CYGWIN__)
# if defined(__GNUC__) && defined(__CYGWIN__)

#  define SIZEOF_LONG 4

...然后導致此錯誤：

In file included from /usr/include/python2.7/Python.h:58:0,
                 from ./boost/python/detail/wrap_python.hpp:142,
                 from ./boost/python/detail/prefix.hpp:13,
                 from ./boost/python/converter/registrations.hpp:8,
                 from libs\python\src\object\function_doc_signature.cpp:9:
/usr/include/python2.7/pyport.h:886:2: error: #error "LONG_BIT definition appears wrong for platform (bad gcc/glibc config?)."
 #error "LONG_BIT definition appears wrong for platform (bad gcc/glibc config?)."
  ^

如何使所有內容都為64位？

Answer 1

要正確編譯，您要做的就是更改

#if defined(_WIN32) || defined(__CYGWIN__)
# if defined(__GNUC__) && defined(__CYGWIN__)
#  define SIZEOF_LONG 4

至

#if defined(_WIN32) || defined(__CYGWIN__)
# if defined(__GNUC__) && defined(__CYGWIN__)
#  define SIZEOF_LONG 8

在/boost/python/detail/wrap_python.hpp文件中。 在Cygwin-64和GCC-4.9.3下測試。 另請參閱此處 。 也許您已經找到了自己的解決方案，但是我希望這個答案可以對其他人有所幫助。