regression with 1.2.*: rule conflict #1306
Description
I have the following dune file with a self built stubs archive:
(rule
(targets libbatsat_stubs.a dllbatsat_stubs.so) ;libbatsat_c.so)
(deps ./lib.rs ../Cargo.toml (source_tree ../batsat))
(mode fallback)
(action
(progn
(chdir ..
(progn
(run cp -r ../../../../src/batsat ..)
(chdir src (run cargo build --release))))
; TODO: strip the libs first
(run cp ../target/release/libbatsat_stubs.a .)
(run cp ../target/release/libbatsat_stubs.so dllbatsat_stubs.so)
)))
(library
(name batsat)
(public_name batsat)
(libraries threads)
(wrapped false)
(modules batsat)
(flags :standard -safe-string -w @8)
(c_library_flags :standard -ldl -lpthread) ; -lbatsat_c) ; -static)
;(modes native)
(self_build_stubs_archive (libbatsat_stubs)) ; custom!
(c_names batsat_stubs)
(c_flags -fPIC -std=c99)
)
On 1.1, it builds perfectly well. On 1.2 (and 1.2.1):
Multiple rules generated for _build/default/src/batsat-ocaml/src/libbatsat_stubs.a:
- <internal location>
- src/batsat-ocaml/src/dune:2
make: *** [Makefile:22: build-ocaml] Error 1
(to experiment, look at https://github.com/c-cube/batsat/tree/master/src/batsat-ocaml)