Parse llvm-strip version

Cabal/src/Distribution/Simple/Program/Internal.hs

@@ -17,21 +17,28 @@ import Prelude ()
 
 -- | Extract the version number from the output of 'strip --version'.
 --
--- Invoking "strip --version" gives very inconsistent results. We ignore
--- everything in parentheses (see #2497), look for the first word that starts
--- with a number, and try parsing out the first two components of it. Non-GNU
--- 'strip' doesn't appear to have a version flag.
+-- Invoking "strip --version" gives very inconsistent results. We
+-- ignore everything in parentheses (see #2497), look for the first
+-- word that starts with a number, and try parsing out the first two
+-- components of it. Non-GNU, non-LLVM 'strip' doesn't appear to have
+-- a version flag.
 stripExtractVersion :: String -> String
 stripExtractVersion str =
   let numeric "" = False
       numeric (x : _) = isDigit x
 
+      closingParentheses = [
+          ")"
+          -- LLVM strip outputs "llvm-strip, compatible with GNU strip\nLLVM (http://llvm.org/):\n..."
+        , "):"
+        ]
+
       -- Filter out everything in parentheses.
       filterPar' :: Int -> [String] -> [String]
       filterPar' _ [] = []
       filterPar' n (x : xs)
         | n >= 0 && "(" `isPrefixOf` x = filterPar' (n + 1) ((safeTail x) : xs)
-        | n > 0 && ")" `isSuffixOf` x = filterPar' (n - 1) xs
+        | n > 0 && any (`isSuffixOf` x) closingParentheses = filterPar' (n - 1) xs
         | n > 0 = filterPar' n xs
         | otherwise = x : filterPar' n xs