diff --git a/shake-ext.cabal b/shake-ext.cabal
--- a/shake-ext.cabal
+++ b/shake-ext.cabal
@@ -1,6 +1,6 @@
 cabal-version: 1.18
 name: shake-ext
-version: 2.11.0.3
+version: 2.11.0.4
 license: BSD3
 license-file: LICENSE
 copyright: Copyright: (c) 2018 Vanessa McHale
diff --git a/src/Development/Shake/C.hs b/src/Development/Shake/C.hs
--- a/src/Development/Shake/C.hs
+++ b/src/Development/Shake/C.hs
@@ -30,11 +30,13 @@
                            , examineCfg
                            -- * Reëxports from "Language.C.Dependency"
                            , getCDepends
+                           , getAll
                            -- * Helper functions
                            , cconfigToArgs
                            , ccToString
                            , ccFromString
                            , host
+                           , isCross
                            ) where
 
 import           Control.Monad
@@ -91,6 +93,11 @@
 arToString (GCC pre)   = mkQualified pre Nothing "ar"
 arToString (GHC pre _) = mkQualified pre Nothing "ar"
 arToString _           = "ar"
+
+isCross :: CCompiler -> Bool
+isCross (GCC Just{})   = True
+isCross (GHC Just{} _) = True
+isCross _              = False
 
 -- | Attempt to parse a string as a 'CCompiler', defaulting to @cc@ if parsing
 -- fails.