error: ‘integer_sequence’ is not a member of ‘std’

本人在编译CAMODOCAL工程时遇到了该错误：

/usr/local/include/ceres/internal/integer_sequence_algorithm.h:64:21: error: ‘integer_sequence’ is not a member of ‘std’struct SumImpl<std::integer_sequence<T, N, Ns...>> {^~~~~~~~~~~~~~~~
/usr/local/include/ceres/internal/integer_sequence_algorithm.h:64:21: error: ‘integer_sequence’ is not a member of ‘std’
/usr/local/include/ceres/internal/integer_sequence_algorithm.h:64:46: error: wrong number of template arguments (3, should be 1)struct SumImpl<std::integer_sequence<T, N, Ns...>> {^~~
/usr/local/include/ceres/internal/integer_sequence_algorithm.h:60:8: note: provided for ‘template<class Seq> struct ceres::internal::SumImpl’struct SumImpl;^~~~~~~
/usr/local/include/ceres/internal/integer_sequence_algorithm.h:64:49: error: expected unqualified-id before ‘>’ tokenstruct SumImpl<std::integer_sequence<T, N, Ns...>> {^~
/usr/local/include/ceres/internal/integer_sequence_algorithm.h:71:21: error: ‘integer_sequence’ is not a member of ‘std’struct SumImpl<std::integer_sequence<T, N1, N2, Ns...>> {^~~~~~~~~~~~~~~~
/usr/local/include/ceres/internal/integer_sequence_algorithm.h:71:21: error: ‘integer_sequence’ is not a member of ‘std’
/usr/local/include/ceres/internal/integer_sequence_algorithm.h:71:51: error: wrong number of template arguments (4, should be 1)struct SumImpl<std::integer_sequence<T, N1, N2, Ns...>> {^~~
/usr/local/include/ceres/internal/integer_sequence_algorithm.h:60:8: note: provided for ‘template<class Seq> struct ceres::internal::SumImpl’struct SumImpl;^~~~~~~
/usr/local/include/ceres/internal/integer_sequence_algorithm.h:71:54: error: expected unqualified-id before ‘>’ tokenstruct SumImpl<std::integer_sequence<T, N1, N2, Ns...>> {^~
/usr/local/include/ceres/internal/integer_sequence_algorithm.h:78:21: error: ‘integer_sequence’ is not a member of ‘std’struct SumImpl<std::integer_sequence<T, N1, N2, N3, N4, Ns...>> {^~~~~~~~~~~~~~~~
/usr/local/include/ceres/internal/integer_sequence_algorithm.h:78:21: error: ‘integer_sequence’ is not a member of ‘std’

归根结底是ceres的版本问题，网上有很多解决办法，对于别的工程可能管用：

修改cmakelists文件中：

set(CMAKE_CXX_FLAGS "-std=c++11")

为：

set(CMAKE_CXX_STANDARD 11)

或者：

set(CMAKE_CXX_STANDARD 14)

详细可见ceres的源代码说明：

https://github.com/ceres-solver/ceres-solver/issues/604

但如果还是不行，比如本人编译CamOdoCal这种老项目，可以将ceres版本退回到1.1.4，感谢网友，详细操作可以见此链接：

https://blog.csdn.net/qq_41586768/article/details/107541917?spm=1001.2101.3001.6661.1&utm_medium=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7ECTRLIST%7Edefault-1.nonecase&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7ECTRLIST%7Edefault-1.nonecasehttps://blog.csdn.net/qq_41586768/article/details/107541917?spm=1001.2101.3001.6661.1&utm_medium=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7ECTRLIST%7Edefault-1.nonecase&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7ECTRLIST%7Edefault-1.nonecase

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