reintroduce the compiler API

src/compiler/api/GF/Infra/BuildInfo.hs

@@ -0,0 +1,16 @@
+{-# LANGUAGE CPP #-}
+module GF.Infra.BuildInfo where
+import System.Info
+import Data.Version(showVersion)
+
+{-# NOINLINE buildInfo #-}
+buildInfo =
+    "Built on "++os++"/"++arch
+    ++" with "++compilerName++"-"++showVersion compilerVersion
+    ++", flags:"
+#ifdef USE_INTERRUPT
+    ++" interrupt"
+#endif
+#ifdef SERVER_MODE
+    ++" server"
+#endif