openssl_user_macros, OPENSSL_API_COMPAT, OPENSSL_NO_DEPRECATED - User defined macros
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 forms:
This is the form supported for all versions up to 1.1.x, where
Mrepresents the major number,
NNrepresents the minor number, and
FFrepresents 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 meaningful:
For convenience, higher numbers are accepted as well, as long as feasible. For example,
0x60000000Lwill work as expected. However, it is recommended to start using the second form instead:
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 example:
- 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:
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.
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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 https://www.openssl.org/source/license.html.