Path with dot results in confusing build error

[ygrek]

StR:

• apply the following patch to extunix :

diff --git a/_oasis b/_oasis
index 704023e..c854ef9 100644
--- a/_oasis
+++ b/_oasis
@@ -41,7 +41,7 @@ Flag strict
   Default: true
 
 Library extunix
-  Path: src/
+  Path: ./src/
   Modules: ExtUnix, ExtUnixAll, ExtUnixSpecific, ExtUnixConfig
   if flag(strict) && ccomp_type(cc)
     CCOpt: -pedantic -Wno-long-long -Wextra

• oasis setup
• make
• observe build failing with :

Finished, 0 targets (0 cached) in 00:00:00.
Solver failed:
  Ocamlbuild knows of no rules that apply to a target named src/extunix.mly. This can happen if you ask Ocamlbuild to build a target with the wrong extension (e.g. .opt instead of .native) or if the source files live in directories that have not been specified as include directories.
Compilation unsuccessful after building 77 targets (77 cached) in 00:00:00.

reproduces on other projects with C stubs, without C stubs it works ok

[gildor478]

Can you send me the generated setup.ml and myocamlbuild.ml and the file _build/_log?

[ygrek]

strange_dot.zip

I suspect the reason is that file path normalization is not applied universally somewhere (inside ocamlbuild?), see:

$ grep libextunix_stubs _log
# Target: src/extunix_stubs, tags: { annot, bin_annot, c, debug, extension:a, file:src/libextunix_stubs.a, my_warnings, ocamlmklib, quiet, safe_string, traverse }
              - Building ./src/libextunix_stubs.a:
                      - Building ./src/libextunix_stubs.cmx:
                              - Building ./src/libextunix_stubs.ml:
                                      - Building ./src/libextunix_stubs.mly
                                      - Building ./src/libextunix_stubs.mll
                              - Building ./src/libextunix_stubs.mlpack
                      - Building ./src/libextunix_stubs.mllib
                      - Building ./src/libextunix_stubs.clib:

ftr start command of ocamlbuild is :

E: Failure("Command ''/home/ygrek/.opam/4.05.0/bin/ocamlbuild' ./src/libextunix_stubs.a ./src/dllextunix_stubs.so ./src/extunix.cma ./src/extunix.cmxa ./src/extunix.a ./src/extunix.cmxs -tag debug' terminated with error code 6")

btw dot can be just forbidden if anything