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- // boost/system/api_config.hpp -------------------------------------------------------//
- // Copyright Beman Dawes 2003, 2006, 2010
- // Distributed under the Boost Software License, Version 1.0.
- // See http://www.boost.org/LICENSE_1_0.txt
- // See http://www.boost.org/libs/system for documentation.
- //--------------------------------------------------------------------------------------//
- // Boost.System calls operating system API functions to implement system error category
- // functions. Usually there is no question as to which API is to be used.
- //
- // In the case of MinGW or Cygwin/MinGW, however, both POSIX and Windows API's are
- // available. Chaos ensues if other code thinks one is in use when Boost.System was
- // actually built with the other. This header centralizes the API choice and prevents
- // user definition of API macros, thus elminating the possibility of mismatches and the
- // need to test configurations with little or no practical value.
- //
- //--------------------------------------------------------------------------------------//
- #ifndef BOOST_SYSTEM_API_CONFIG_HPP
- #define BOOST_SYSTEM_API_CONFIG_HPP
- # if defined(BOOST_POSIX_API) || defined(BOOST_WINDOWS_API)
- # error user defined BOOST_POSIX_API or BOOST_WINDOWS_API not supported
- # endif
- // BOOST_POSIX_API or BOOST_WINDOWS_API specify which API to use
- // Cygwin/MinGW does not predefine _WIN32.
- // Standalone MinGW and all other known Windows compilers do predefine _WIN32
- // Compilers that predefine _WIN32 or __MINGW32__ do so for Windows 64-bit builds too.
- # if defined(_WIN32) || defined(__CYGWIN__) // Windows default, including MinGW and Cygwin
- # define BOOST_WINDOWS_API
- # else
- # define BOOST_POSIX_API
- # endif
-
- #endif // BOOST_SYSTEM_API_CONFIG_HPP
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