openssl_user_macros, OPENSSL_API_COMPAT, OPENSSL_NO_DEPRECATED - User defined
User defined macros allow the programmer to control certain aspects of what is
exposed by the OpenSSL headers.
NOTE: to be effective, a user defined macro must be
defined before including any header file that depends on it,
either in the compilation command ("cc
-DMACRO=value") or by defining the macro in source before
including any headers.
Other manual pages may refer to this page when declarations depend
on user defined macros.
- The value is a version number, given in one of the following two
- This is the form supported for all versions up to 1.1.x, where
"M" represents the major number,
"NN" represents the minor number, and
"FF" represents the fix number, as a
hexadecimal number. For version 1.1.0, that's
Any version number may be given, but these numbers are the
current known major deprecation points, making them the most
- "0x00908000L" (version 0.9.8)
- "0x10000000L" (version 1.0.0)
- "0x10100000L" (version 1.1.0)
For convenience, higher numbers are accepted as well, as long as
feasible. For example, "0x60000000L" will
work as expected. However, it is recommended to start using the second form
- This form is a simple decimal number calculated with this formula:
major * 10000 + minor * 100 + patch
where major, minor and patch are the
desired major, minor and patch components of the version number. For
- 30000 corresponds to version 3.0.0
- 10002 corresponds to version 1.0.2
- 420101 corresponds to version 42.1.1
If OPENSSL_API_COMPAT is undefined, this default value is
used in its place: 30000
Copyright 2018-2021 The OpenSSL Project Authors. All Rights Reserved.
- If this macro is defined, all deprecated public symbols in all OpenSSL
versions up to and including the version given by
OPENSSL_API_COMPAT (or the default value given above, when
OPENSSL_API_COMPAT isn't defined) will be hidden.
Licensed under the Apache License 2.0 (the "License").
You may not use this file except in compliance with the License. You can
obtain a copy in the file LICENSE in the source distribution or at