[sledge] Add `make check` using `dune build @check`

Summary:
This triggers dune to build the minimum necessary to type-check and
populate files merlin uses for cross-module information.

Reviewed By: mbouaziz

Differential Revision: D10389480

fbshipit-source-id: 1ac7e0584

sledge/Makefile

@@ -3,8 +3,13 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# Expected workflow is to launch `make watch` in a terminal to
+# continuously rebuild when files change, and to use `make check` in
+# the editor to quickly type-check and populate files used by merlin
+# for cross-module information.
+
 .PHONY: default
-default: dev
+default: exes
 
 DUNEINS=$(shell find src -name dune.in)
 DUNES=$(patsubst %.in,%,$(DUNEINS))
@@ -18,6 +23,10 @@ dunes: $(DUNES)
 .PHONY: setup
 setup: dunes
 
+.PHONY: check
+check: setup
+	dune build @check
+
 .PHONY: exes
 exes: setup
 	dune build _build/dev/src/sledge.exe _build/release/src/sledge.exe _build/dev/sledge.install _build/release/sledge.install
@@ -26,18 +35,6 @@ exes: setup
 watch: setup
 	dune build --watch _build/dev/src/sledge.exe _build/release/src/sledge.exe
 
-.PHONY: bc
-bc: setup
-	dune build _build/dev/src/sledge.bc
-
-.PHONY: dev
-dev: setup
-	dune build _build/dev/src/sledge.exe
-
-.PHONY: release
-release: setup
-	dune build _build/release/src/sledge.exe
-
 .PHONY: test
 test:
 	dune build @_build/dev/runtest --auto-promote

sledge/sledge.opam

@@ -12,7 +12,7 @@ depends: [
   "core_kernel" {>= "v0.11.0"}
   "ctypes"
   "ctypes-foreign"
-  "dune" {build >= "1.4.0"}
+  "dune" {build > "1.4.0"}
   "llvm" {build & = "7.0.0"}
   "ppx_compare" {>= "v0.11.0"}
   "ppx_hash" {>= "v0.11.0"}