Finished, 0 targets (0 cached) in 00:00:00.
File "_tags", line 18, characters 13-25:
Warning: the tag "pkg_ocamlsdl" is not used in any flag declaration, so it will have no effect; it may be a typo. Otherwise use `mark_tag_used` in your myocamlbuild.ml to disable this warning.
File "_tags", line 19, characters 14-26:
Warning: the tag "pkg_ocamlsdl" is not used in any flag declaration, so it will have no effect; it may be a typo. Otherwise use `mark_tag_used` in your myocamlbuild.ml to disable this warning.
+ /home/dev_ss/.opam/4.02.1/bin/ocamlfind ocamlc -c -g -annot -bin-annot -o main.cmo main.ml
File "main.ml", line 7, characters 2-10:
Error: Unbound module Sdl
Command exited with code 2.
Compilation unsuccessful after building 4 targets (3 cached) in 00:00:00.
E: Failure("Command ''/home/dev_ss/.opam/4.02.1/bin/ocamlbuild' ./main.byte -tag debug' terminated with error code 10")
[1]    26545 exit 1     ocaml setup.ml -build