visibility.hpp

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/** Defines an MCAP_PUBLIC visibility attribute macro, which is used on all public interfaces.
 *  This can be defined before including `mcap.hpp` to directly control symbol visibility.
 *  If not defined externally, this library attempts to export symbols from the translation unit
 *  where MCAP_IMPLEMENTATION is defined, and import them anywhere else.
 */
#ifndef MCAP_PUBLIC
#if defined _WIN32 || defined __CYGWIN__
#  ifdef MCAP_IMPLEMENTATION
#    ifdef __GNUC__
#      define MCAP_PUBLIC __attribute__((dllexport))
#    else
#      define MCAP_PUBLIC __declspec(dllexport)
#    endif
#  else
#    ifdef __GNUC__
#      define MCAP_PUBLIC __attribute__((dllimport))
#    else
#      define MCAP_PUBLIC __declspec(dllimport)
#    endif
#  endif
#else
#  if __GNUC__ >= 4
#    define MCAP_PUBLIC __attribute__((visibility("default")))
#  else
#    define MCAP_PUBLIC
#  endif
#endif
#endif