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The C and C++ Include Header Files

/usr/include/openssl/ossl_typ.h


$ cat -n /usr/include/openssl/ossl_typ.h

     1	/*
     2	 * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
     3	 *
     4	 * Licensed under the Apache License 2.0 (the "License").  You may not use
     5	 * this file except in compliance with the License.  You can obtain a copy
     6	 * in the file LICENSE in the source distribution or at
     7	 * https://www.openssl.org/source/license.html
     8	 */
     9	
    10	/*
    11	 * The original <openssl/ossl_typ.h> was renamed to <openssl/types.h>
    12	 *
    13	 * This header file only exists for compatibility reasons with older
    14	 * applications which #include <openssl/ossl_typ.h>.
    15	 */
    16	# include <openssl/types.h>