diff options
Diffstat (limited to 'ocamlbuild/ocaml_compiler.ml')
| -rw-r--r-- | ocamlbuild/ocaml_compiler.ml | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/ocamlbuild/ocaml_compiler.ml b/ocamlbuild/ocaml_compiler.ml index e21618ee0..c270a7f63 100644 --- a/ocamlbuild/ocaml_compiler.ml +++ b/ocamlbuild/ocaml_compiler.ml @@ -116,10 +116,30 @@ let prepare_compile build ml = match mandatory, res with | _, Good _ -> () | `mandatory, Bad exn -> - if !Options.ignore_auto then - dprintf 3 "Warning: Failed to build the module \ - %s requested by ocamldep" name - else raise exn + if not !Options.ignore_auto then raise exn; + dprintf 3 + "Warning: Failed to build the module %s requested by ocamldep." + name; + if not (!Options.recursive || Options.ocamlbuild_project_heuristic ()) + then Log.at_failure ~name:"a module failed to build, + while recursive traversal was disabled by fragile heuristic; + hint that having a _tags or myocamlbuild.ml would maybe solve + the build error" + (fun `Error -> + eprintf "Hint:@ Recursive@ traversal@ of@ subdirectories@ \ + was@ not@ enabled@ for@ this@ build,@ as@ the@ working@ \ + directory does@ not@ look@ like@ an@ ocamlbuild@ project@ \ + (no@ '_tags'@ or@ 'myocamlbuild.ml'@ file).@ \ + If@ you@ have@ modules@ in@ subdirectories,@ you@ should@ add@ \ + the@ option@ \"-r\"@ or@ create@ an@ empty@ '_tags'@ file.@\n\ + @\n\ + To@ enable@ recursive@ traversal@ for@ some@ subdirectories@ \ + only,@ you@ can@ use@ the@ following@ '_tags'@ file:@\n\ + @[<v 4>@,\ + true: -traverse@,\ + <dir1> or <dir2>: traverse@,\ + @]" + ); | `just_try, Bad _ -> () end modules results |