flambda-backend: Config.flambda2 (#58)

Author: mshinwell

utils/config.mli

@@ -195,7 +195,10 @@ val target : string
 (** Whether the compiler is a cross-compiler *)
 
 val flambda : bool
-(** Whether the compiler was configured for flambda *)
+(** Whether the compiler was configured for Flambda 1 *)
+
+val flambda2 : bool
+(** Whether the compiler was configured for Flambda 2 *)
 
 val with_flambda_invariants : bool
 (** Whether the invariants checks for flambda are enabled *)

utils/config.mlp

@@ -74,6 +74,7 @@ let mkdll, mkexe, mkmaindll =
     "%%MKDLL%%", "%%MKEXE%%", "%%MKMAINDLL%%"
 
 let flambda = %%FLAMBDA%%
+let flambda2 = false
 let with_flambda_invariants = %%WITH_FLAMBDA_INVARIANTS%%
 let safe_string = %%FORCE_SAFE_STRING%%
 let default_safe_string = %%DEFAULT_SAFE_STRING%%