aws-encryption-sdk-cpp/include/aws/cryptosdk/cpp/exports.h

#ifndef AWS_CRYPTOSDK_CPP_EXPORTS_H
#define AWS_CRYPTOSDK_CPP_EXPORTS_H
/*
 * Copyright 2010-2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file is distributed
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */
#if defined(WIN32)
#    ifdef AWS_ENCRYPTION_SDK_CPP_SHARED
#        ifdef AWS_ENCRYPTION_SDK_CPP_EXPORTS
#            define AWS_CRYPTOSDK_CPP_API __declspec(dllexport)
#        else
#            define AWS_CRYPTOSDK_CPP_API __declspec(dllimport)
#        endif /* AWS_CRYPTOSDK_CPP_API */
#    else
#        define AWS_CRYPTOSDK_CPP_API
#    endif /* AWS_ENCRYPTION_SDK_CPP_SHARED */

#else /* defined (WIN32) */

/*
 * We don't use -fvisibility=hidden for the C++ side due to problems
 * where std::basic_string statics are template-expanded multiple times.
 */
#    define AWS_CRYPTOSDK_CPP_API

#endif /* defined (WIN32) */

#endif /* AWS_CRYPTOSDK_CPP_EXPORTS_H */