boost/system/api_config.hpp
// 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