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config: allow user to override BOOST_ASIO_DECL #462

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config: allow user to override BOOST_ASIO_DECL #462

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34 changes: 18 additions & 16 deletions include/boost/asio/detail/config.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -41,27 +41,29 @@
# endif // !defined(BOOST_ASIO_SEPARATE_COMPILATION)
#endif // !defined(BOOST_ASIO_HEADER_ONLY)

#if defined(BOOST_ASIO_HEADER_ONLY)
# define BOOST_ASIO_DECL inline
#else // defined(BOOST_ASIO_HEADER_ONLY)
# if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__CODEGEARC__)
#if !defined(BOOST_ASIO_DECL)
# if defined(BOOST_ASIO_HEADER_ONLY)
# define BOOST_ASIO_DECL inline
# else // defined(BOOST_ASIO_HEADER_ONLY)
# if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__CODEGEARC__)
// We need to import/export our code only if the user has specifically asked
// for it by defining BOOST_ASIO_DYN_LINK.
# if defined(BOOST_ASIO_DYN_LINK)
# if defined(BOOST_ASIO_DYN_LINK)
// Export if this is our own source, otherwise import.
# if defined(BOOST_ASIO_SOURCE)
# define BOOST_ASIO_DECL __declspec(dllexport)
# else // defined(BOOST_ASIO_SOURCE)
# define BOOST_ASIO_DECL __declspec(dllimport)
# endif // defined(BOOST_ASIO_SOURCE)
# endif // defined(BOOST_ASIO_DYN_LINK)
# endif // defined(_MSC_VER) || defined(__BORLANDC__) || defined(__CODEGEARC__)
#endif // defined(BOOST_ASIO_HEADER_ONLY)
# if defined(BOOST_ASIO_SOURCE)
# define BOOST_ASIO_DECL __declspec(dllexport)
# else // defined(BOOST_ASIO_SOURCE)
# define BOOST_ASIO_DECL __declspec(dllimport)
# endif // defined(BOOST_ASIO_SOURCE)
# endif // defined(BOOST_ASIO_DYN_LINK)
# endif // defined(_MSC_VER) || defined(__BORLANDC__) || defined(__CODEGEARC__)
# endif // defined(BOOST_ASIO_HEADER_ONLY)

// If BOOST_ASIO_DECL isn't defined yet define it now.
#if !defined(BOOST_ASIO_DECL)
# define BOOST_ASIO_DECL
#endif // !defined(BOOST_ASIO_DECL)
# if !defined(BOOST_ASIO_DECL)
# define BOOST_ASIO_DECL
# endif // !defined(BOOST_ASIO_DECL)
#endif

// Helper macro for documentation.
#define BOOST_ASIO_UNSPECIFIED(e) e
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