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Transition guide: removed one of the version check methods

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Maksim Shabunin 2015-05-25 18:05:20 +03:00
parent 44d1738d47
commit 55d1f0b7d6
1 changed files with 3 additions and 15 deletions
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doc/tutorials/introduction/transition_guide/transition_guide.markdown
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@ -264,28 +264,16 @@ In some cases it is possible to support both versions of OpenCV.
### Source code
To check library major version one of the following methods can be used:
- if __CV_VERSION_EPOCH__ is defined - you are using 2.4 branch, otherwise - 3.x
- __CV_MAJOR_VERSION__ is defined as `2` or `3` for corresponding version
One of `opencv2/core/version.hpp` or `opencv2/core/core.hpp` files should be included to use these definitions.
Examples:
@code{.cpp}
#ifdef CV_VERSION_EPOCH
// do opencv 2 code
#else
// do opencv 3 code
#endif
@endcode
or
To check library major version in your application source code, the following method should be used:
@code{.cpp}
#include "opencv2/core/version.hpp"
#if CV_MAJOR_VERSION == 2
// do opencv 2 code
#elif CV_MAJOR_VERSION == 3
// do opencv 3 code
#endif
@endcode
@note Do not use __CV_VERSION_MAJOR__, it has different meaning for 2.4 and 3.x branches!
### Build system