Added building of compile_commands.json

Author: mmottl

Makefile

@@ -1,10 +1,11 @@
 .PHONY: all clean doc
 
 all:
-	dune build @install
+	@dune build @install
+	@make -C lib compile_commands.json
 
 clean:
-	dune clean
+	@dune clean
 
 doc:
-	dune build @doc
+	@dune build @doc

lib/Makefile

@@ -2,8 +2,12 @@ TARGETS = postgresql.cma libpostgresql_stubs.a
 
 .PHONY: all clean
 
-all:
+all: compile_commands.json
 	@dune build $(TARGETS)
 
 clean:
 	@dune clean
+	@rm -f compile_commands.json
+
+compile_commands.json: config/dune config/discover.ml postgresql_stubs.c
+	@dune rules | dune-compiledb