I added several different versions of Eigen to default including directory of Visual C++. But I got collapse problem when using LDLT (Cholesky decomposition) for some of the testing numerical examples.
So I want to determine which version is actually active when debugging the code.
Is there any function which can indicate the current active Eigen version number?
This answer is only a summary from the comments above:
At compile-time you have EIGEN_WORLD_VERSION, EIGEN_MAJOR_VERSION and EIGEN_MINOR_VERSION, you can easily embed this information in your application.
3.1.91 sounds like a beta version of 3.2.
The version number macros are defined in Macros.h located at \Eigen\src\Core\util\.
cat /usr/include/eigen3/Eigen/src/Core/util/Macros.h | grep VERSION will show you the version.In order to check the version number of Eigen C++ template library, just type
dpkg -p libeigen3-dev in the terminal. Or just type
pkg-config --modversion eigen3 you will get the Eigen version.
Although it is not the goal of the OP, people finding this question may be interested in checking if the version is equal to are newer than a specific release for compatibility reasons with different versions of Eigen. This can be done more easily using the EIGEN_VERSION_AT_LEAST(x, y, z) macro as follows:
#if EIGEN_VERSION_AT_LEAST(3,3,0) // Implementation for Eigen 3.3.0 and newer #else // Implementation for older Eigen versions #endif This macro is also defined in Eigen/src/Core/util/Macros.h and uses EIGEN_WORLD_VERSION, EIGEN_MAJOR_VERSION and EIGEN_MINOR_VERSION internally.
On Linux:
grep "#define EIGEN_[^_]*_VERSION" /usr/local/include/eigen3/Eigen/src/Core/util/Macros.h You'll get something like:
#define EIGEN_WORLD_VERSION 3 #define EIGEN_MAJOR_VERSION 3 #define EIGEN_MINOR_VERSION 7 It means version 3.3.7
EIGEN_WORLD_VERSION,EIGEN_MAJOR_VERSIONandEIGEN_MINOR_VERSION, you can easily embed this information in your application.3,1and91respectively, does this mean the most latest3.20since there is no3.191release?Macros.hlocated at\Eigen\src\Core\util\. thank you.