Build fails: Exception Sys_error("main.mli.depends: No such file or directory").

[yurivict]

make[4]: Entering directory '/usr/ports/lang/lem/work/lem-2020-01-30/src'
ocamlbuild -use-ocamlfind -cflags -g main.native
Exception Sys_error("main.mli.depends: No such file or directory").
Compilation unsuccessful after building 2 targets (0 cached) in 00:00:00.
make[2]: *** [Makefile:2: all] Error 100

Despite this error, the build continues and later fails again:

make[2]: Entering directory '/usr/ports/lang/lem/work/lem-2020-01-30'
make[2]: warning: jobserver unavailable: using -j1.  Add '+' to parent make rule.
make -C ocaml-lib all
make[3]: Entering directory '/usr/ports/lang/lem/work/lem-2020-01-30/ocaml-lib'
ocamlbuild.mk:40: *** multiple target patterns.  Stop.
make[3]: Leaving directory '/usr/ports/lang/lem/work/lem-2020-01-30/ocaml-lib'
make[2]: *** [Makefile:73: ocaml-libs] Error 2
make[2]: Leaving directory '/usr/ports/lang/lem/work/lem-2020-01-30'
gmake[1]: *** [Makefile:53: libs_phase_1] Error 2
gmake[1]: Leaving directory '/usr/ports/lang/lem/work/lem-2020-01-30'

FreeBSD 12

[bauereiss]

Which versions of OCaml, ocamlbuild, and ocamlfind are you using?

[yurivict]

ocaml-4.05.0_1, ocaml-ocamlbuild-0.14.0, ocaml-findlib-1.7.1

[bauereiss]

I've tried it with a FreeBSD VM, and can reproduce the error. It seems the problem is the initialisation of the INSTALLDIR variable in ocamlbuild.mk; it uses the shell command ocamlfind printconf destdir, which in the default FreeBSD installation of ocamlfind returns not one, but two directories, separated by a colon, and that confuses make. I'm not sure what to do about that in general. As a workaround you could try manually overriding INSTALLDIR when invoking make.

[yurivict]

When I added INSTALLDIR=${LOCALBASE}/lib/ocaml/site-lib it now fails in another way:

mkdir: /usr/ports/lang/lem/work/lem-2020-01-30/src/_build: File exists
Command exited with code 1.

[bauereiss]

Hm, I don't see a command in the Lem Makefiles that creates that directory, other than ocamlbuild. Maybe something went wrong during an earlier run of the latter? Does this error occur in a clean checkout of Lem?

[yurivict]

It occurs in a clean build.

[bauereiss]

What's the context of this error, i.e. what is happening before?

[yurivict]

It looks like the previous error was intermittent. Now it fails in this way:

===>  Building for lem-language-2020.01.30
gmake[1]: Entering directory '/usr/ports/lang/lem/work/lem-2020-01-30'
echo "(* Generated file -- do not edit. *)" > src/version.ml
echo "(* Generated file -- do not edit. *)" > src/share_directory.ml
make -C library
echo 'let v="2018-04-23"' >> src/version.ml
echo let d=\"/usr/ports/lang/lem/work/lem-2020-01-30/share/lem\" >> src/share_directory.ml
make[2]: Entering directory '/usr/ports/lang/lem/work/lem-2020-01-30'
make[2]: warning: jobserver unavailable: using -j1.  Add '+' to parent make rule.
make -C src all
make[2]: Entering directory '/usr/ports/lang/lem/work/lem-2020-01-30'
make[2]: warning: jobserver unavailable: using -j1.  Add '+' to parent make rule.
make -C .. build-lem
ocamlbuild -use-ocamlfind -cflags -g main.native
make[3]: Entering directory '/usr/ports/lang/lem/work/lem-2020-01-30'
echo "(* Generated file -- do not edit. *)" > src/version.ml
echo 'let v="2018-04-23"' >> src/version.ml
echo "(* Generated file -- do not edit. *)" > src/share_directory.ml
echo let d=\"/usr/ports/lang/lem/work/lem-2020-01-30/share/lem\" >> src/share_directory.ml
make -C src all
make[4]: Entering directory '/usr/ports/lang/lem/work/lem-2020-01-30/src'
ocamlbuild -use-ocamlfind -cflags -g main.native
Exception Sys_error("main.mli.depends: No such file or directory").
Compilation unsuccessful after building 2 targets (0 cached) in 00:00:00.
make[2]: *** [Makefile:2: all] Error 100
make[2]: Leaving directory '/usr/ports/lang/lem/work/lem-2020-01-30/src'
gmake[1]: *** [Makefile:180: build-lem] Error 2
gmake[1]: *** Waiting for unfinished jobs....
+ ocamlfind ocamlopt -c -g -annot -package zarith -I ulib -o ulib/batUTF8.cmx ulib/batUTF8.ml
File "ulib/batUTF8.ml", line 209, characters 2-13:
Warning 3: deprecated: String.copy
+ ocamlfind ocamlopt -c -g -annot -package zarith -I ulib -o reporting_basic.cmx reporting_basic.ml
File "reporting_basic.ml", line 80, characters 12-25:
Warning 3: deprecated: String.create

[bauereiss]

Are you trying to build with multiple concurrent jobs? This looks like two instances of the same ocamlbuild job end up running concurrently, which might explain the error.

[yurivict]

That was it, parallel jobs were conflicting. Thanks!

Now it fails at a later point:

lem_wordAuxiliary.ml
\n\n\n
***************************************************
* Testing lem_basic_classes
***************************************************\n
Fatal error: cannot load shared library dllzarith
Reason: Shared object "dllzarith.so" not found, required by "ocamlrun"

[bauereiss]

I've seen this too, and pushed a commit that fixes it for me.