cant find_package(Ceres REQUIRED) on macos !!! about ceres-solver HOT 8 OPEN

@sandwichmaker could you tell me why above problem occured ?

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The error stems from your Homebrew version of SuiteSparse not from Ceres:

/opt/homebrew/lib/cmake/SuiteSparse_config/SuiteSparse_configConfig.cmake:68 (find_dependency)

For some reason, the OpenMP C component is not usable. You could check the CMake configure log to identify the issue.

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@sergiud if not ceres proplem, why can i replace ceres version solve the problem ?

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@sergiud ceres 2.1.0 is ok, but ceres 2.2.0 not ok

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Three people around me have all experienced this problem，we just run "brew update" and the problem occurred, my home brew version: Homebrew 4.0.23-12-ge986264

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While Ceres 2.1.0 supported OpenMP as one of the threading backends, Ceres 2.2.0 removed OpenMP support in 06bfe6f. This is likely the reason why the issue no longer occurs in Ceres 2.2.0. However, even in 2.1.0 Ceres did nothing special here:

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@sergiud how can i remove OpenMP support in ceres 2.1.0 ?

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You could try explicitly setting the CERES_THREADING_MODEL CMake variable, e.g., to CXX_THREADS to avoid Ceres invoking the above find_package call. Alternatively, you can unconditionally set the threading backend to CXX_THREADS here:

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