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Error compiling BLAM: GTSAM built on different Eigen #48

Closed BMannell closed 5 years ago

BMannell commented 5 years ago

I'm getting a strange error when running ./update.

In file included from /home/ben/Documents/blam/internal/src/laser_loop_closure/include/laser_loop_closure/LaserLoopClosure.h:45:0,
                 from /home/ben/Documents/blam/internal/src/laser_loop_closure/src/LaserLoopClosure.cc:37:
/usr/local/include/gtsam/base/Vector.h:72:1: error: static assertion failed: Error: GTSAM was built against a different version of Eigen
 static_assert(
 ^

It seems similar to #6.

Is there a way to enforce either GTSAM or BLAM to use a specific version of Eigen? GTSAM seems to come packaged with a version of Eigen, is there some way to get it to use the previously installed version? How can I tell which version is being used in order to align the versions of the other package?

Ubuntu 16.04 LTS Latest versions of each library from github repos.

BMannell commented 5 years ago

Solution: Set GTSAM_USE_SYSTEM_EIGEN=ON in the GTSAM CMakeCache.txt file.

Conjuror1279 commented 4 years ago

Hey @BMannell, I am an amateur opencv enthusiast facing the same error as you were earlier, and I also tried setting the GTSAM_USE_SYSTEM_EIGEN=ON in the CMakeCache.txt file, but somehow it did not resolve my error. Could you tell what possibly could be the reason for that and how can I resolve it. Thanks :)

BMannell commented 4 years ago

@Conjuror1279 Sorry, I'm afraid I won't be able to help much. I've probably re-installed Ubuntu 3 or 4 times since getting this error and I don't really remember what steps I took during this setup.

Conjuror1279 commented 4 years ago

@BMannell Thank you for your reply, I will see if I can find anything on the internet about the issue.Thanks anyways :).

hilbertletanger commented 3 years ago

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Note that your "set(GTSAM_USE_SYSTEM_EIGEN ON)" command needs to be placed after "include(cmake/HandleEigen.cmake)". Because in HandleEigen.cmake, GTSAM_USE_SYSTEM_EIGEN will be initialized to off by default.