I am following this short tutorial
and trying to compile Webots application (written in C) using GHC (Glasgow Haskell Compiler, Version 7.10.1) with following command:
ghc --make -no-hs-main -optc-O
-I"/Applications/Webots/include/controller/c/"
-L"/Applications/Webots/lib/"
-outputdir build/release/
advanced_genetic_algorithm_supervisor.c
Safe
-o advanced_genetic_algorithm_supervisor
and getting the following error during the linking phase:
Linking advanced_genetic_algorithm_supervisor ...
Undefined symbols for architecture x86_64:
"_wb_display_draw_text", referenced from:
_main in advanced_genetic_algorithm_supervisor.o
"_wb_display_get_height", referenced from:
_main in advanced_genetic_algorithm_supervisor.o
"_wb_display_get_width", referenced from:
_main in advanced_genetic_algorithm_supervisor.o
"_wb_emitter_send", referenced from:
_evaluate_genotype in advanced_genetic_algorithm_supervisor.o
"_wb_receiver_enable", referenced from:
_main in advanced_genetic_algorithm_supervisor.o
"_wb_receiver_get_data", referenced from:
_check_for_slaves_data in advanced_genetic_algorithm_supervisor.o
"_wb_receiver_get_queue_length", referenced from:
_check_for_slaves_data in advanced_genetic_algorithm_supervisor.o
"_wb_receiver_next_packet", referenced from:
_check_for_slaves_data in advanced_genetic_algorithm_supervisor.o
"_wb_robot_cleanup", referenced from:
_run_optimization in advanced_genetic_algorithm_supervisor.o
"_wb_robot_get_basic_time_step", referenced from:
_main in advanced_genetic_algorithm_supervisor.o
"_wb_robot_get_device", referenced from:
_main in advanced_genetic_algorithm_supervisor.o
"_wb_robot_init", referenced from:
_main in advanced_genetic_algorithm_supervisor.o
"_wb_robot_step", referenced from:
_run_seconds in advanced_genetic_algorithm_supervisor.o
_evaluate_genotype in advanced_genetic_algorithm_supervisor.o
"_wb_supervisor_field_get_sf_rotation", referenced from:
_main in advanced_genetic_algorithm_supervisor.o
"_wb_supervisor_field_get_sf_vec3f", referenced from:
_main in advanced_genetic_algorithm_supervisor.o
"_wb_supervisor_field_set_sf_rotation", referenced from:
_evaluate_genotype in advanced_genetic_algorithm_supervisor.o
"_wb_supervisor_field_set_sf_vec3f", referenced from:
_evaluate_genotype in advanced_genetic_algorithm_supervisor.o
"_wb_supervisor_node_get_field", referenced from:
_main in advanced_genetic_algorithm_supervisor.o
"_wb_supervisor_node_get_from_def", referenced from:
_main in advanced_genetic_algorithm_supervisor.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I believe that it means that the compiler cannot find functions ('symbols'), although it managed to pass through compilation process parsing all includes specified in the program using -I path
