Make Error 20.04

[pauldeee]

Hi all,

cmake info:

-- The CXX compiler identification is GNU 9.4.0
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Search Dependency: Eigen3
-- Found Eigen3: /usr/include/eigen3 (Required is at least version "2.91.0") 
-- Search Dependency: Sophus
-- Search Dependency: Cholmod
-- Found CHOLMOD: /usr/include/suitesparse  
-- Search Dependency: SPQR
-- Found SPQR: /usr/include/suitesparse  
-- Build module: core
-- Build module: linear
-- Build module: nonlinear
-- Build module: utils
-- Build module: geometry
-- Build module: slam
-- Build module: linear/cholmod
-- Build module: linear/spqr
-- Library: build shared library
-- Install 3rd-party module: eigen3
-- Add all unit tests, exclude:  ;testCUDASolver
-- Add all C++ examples, exclude:  
-- git submodule update: pybind11
-- Found PythonInterp: /usr/bin/python3.8 (found version "3.8.10") 
-- Found PythonLibs: /usr/lib/x86_64-linux-gnu/libpython3.8.so
-- Performing Test HAS_CPP14_FLAG
-- Performing Test HAS_CPP14_FLAG - Success
-- pybind11 v2.3.dev1
-- ===============================================================
--                 Configurations for miniSAM                     
--  
--   Library type                Shared
--   Install path                /usr/local
--  
--   Compiler type               GNU
--   Compiler version            9.4.0
--   Built type                  Release
--   C++ compilation flags        -std=c++11 -Wall -Werror -Wextra -O3 -DNDEBUG
--  
--   Multi-threading             No
--   Internal profiling          No
--  
--   Eigen                       3.3.7 (/usr/include/eigen3)
--   Sophus                      Yes (/usr/local/share/sophus/cmake)
--   Cholmod                     Yes (/usr/include/suitesparse)
--   SPQR                        Yes (/usr/include/suitesparse)
--   CUDA cuSOLVER               No
--  
--   Python package              Yes
--   Python version              3.8
--   Python executable           /usr/bin/python3.8
--  
-- Configuring done
-- Generating done

Attempting to build this on Ubuntu 20.04 I end up with this error:

[  1%] Building CXX object minisam/CMakeFiles/minisam.dir/nonlinear/DoglegOptimizer.cpp.o
/home/paul/libs/minisam/minisam/nonlinear/DoglegOptimizer.cpp: In member function ‘minisam::NonlinearOptimizationStatus minisam::DoglegOptimizer::tryRadius_(const minisam::FactorGraph&, minisam::Variables&, const VectorXd&, const VectorXd&, double, double)’:
/home/paul/libs/minisam/minisam/nonlinear/DoglegOptimizer.cpp:140:75: error: implicitly-declared ‘minisam::Variables& minisam::Variables::operator=(const minisam::Variables&)’ is deprecated [-Werror=deprecated-copy]
  140 |       values_update = values.retract(dx_dl, h_sparsity_cache_.var_ordering);
      |                                                                           ^
In file included from /home/paul/libs/minisam/minisam/nonlinear/DoglegOptimizer.cpp:11:
/home/paul/libs/minisam/minisam/core/Variables.h:33:3: note: because ‘minisam::Variables’ has user-provided ‘minisam::Variables::Variables(const minisam::Variables&)’
   33 |   Variables(const Variables& variables);
      |   ^~~~~~~~~
/home/paul/libs/minisam/minisam/nonlinear/DoglegOptimizer.cpp:142:75: error: implicitly-declared ‘minisam::Variables& minisam::Variables::operator=(const minisam::Variables&)’ is deprecated [-Werror=deprecated-copy]
  142 |       values_update = values.retract(dx_dl, j_sparsity_cache_.var_ordering);
      |                                                                           ^
In file included from /home/paul/libs/minisam/minisam/nonlinear/DoglegOptimizer.cpp:11:
/home/paul/libs/minisam/minisam/core/Variables.h:33:3: note: because ‘minisam::Variables’ has user-provided ‘minisam::Variables::Variables(const minisam::Variables&)’
   33 |   Variables(const Variables& variables);
      |   ^~~~~~~~~
/home/paul/libs/minisam/minisam/nonlinear/DoglegOptimizer.cpp:208:16: error: implicitly-declared ‘minisam::Variables& minisam::Variables::operator=(const minisam::Variables&)’ is deprecated [-Werror=deprecated-copy]
  208 |       values = values_update;
      |                ^~~~~~~~~~~~~
In file included from /home/paul/libs/minisam/minisam/nonlinear/DoglegOptimizer.cpp:11:
/home/paul/libs/minisam/minisam/core/Variables.h:33:3: note: because ‘minisam::Variables’ has user-provided ‘minisam::Variables::Variables(const minisam::Variables&)’
   33 |   Variables(const Variables& variables);
      |   ^~~~~~~~~
cc1plus: all warnings being treated as errors
make[2]: *** [minisam/CMakeFiles/minisam.dir/build.make:232: minisam/CMakeFiles/minisam.dir/nonlinear/DoglegOptimizer.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:234: minisam/CMakeFiles/minisam.dir/all] Error 2
make: *** [Makefile:141: all] Error 2

Any ideas for how to resolve this?

[oysteikh]

Try removing the -Werror flag from line 63 in CMakeLists.txt. Had the same issue and this resolved it for me.