Workaround for GHC-8.4.x

* Adds missing Semigroup instances
* Adds `semigroups` to the deps of `hmatrix`
* Hides conflicting names from import list with base >= 4.11
    * `(Prelude.<>)` and `GHC.TypeNats.Mod`

2 files changed, 8 insertions, 0 deletions

diff --git a/packages/base/src/Numeric/LinearAlgebra/HMatrix.hs b/packages/base/src/Numeric/LinearAlgebra/HMatrix.hs
index 5ce529c..3a84645 100644
--- a/packages/base/src/Numeric/LinearAlgebra/HMatrix.hs
+++ b/packages/base/src/Numeric/LinearAlgebra/HMatrix.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 --------------------------------------------------------------------------------
 {- |
 Module      :  Numeric.LinearAlgebra.HMatrix
@@ -19,6 +20,9 @@ module Numeric.LinearAlgebra.HMatrix (
 import Numeric.LinearAlgebra
 import Internal.Util
 import Internal.Algorithms(cholSH, mbCholSH, eigSH', eigenvaluesSH', geigSH')
+#if MIN_VERSION_base(4,11,0)
+import Prelude hiding ((<>))
+#endif
 
 infixr 8 <·>
 (<·>) :: Numeric t => Vector t -> Vector t -> t
diff --git a/packages/base/src/Numeric/LinearAlgebra/Static.hs b/packages/base/src/Numeric/LinearAlgebra/Static.hs
index 3000dcb..e328904 100644
--- a/packages/base/src/Numeric/LinearAlgebra/Static.hs
+++ b/packages/base/src/Numeric/LinearAlgebra/Static.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 {-# LANGUAGE DataKinds #-}
 {-# LANGUAGE KindSignatures #-}
 {-# LANGUAGE GeneralizedNewtypeDeriving #-}
@@ -80,6 +81,9 @@ import Control.Arrow((***))
 import Text.Printf
 import Data.Type.Equality ((:~:)(Refl))
 import qualified Data.Bifunctor as BF (first)
+#if MIN_VERSION_base(4,11,0)
+import Prelude hiding ((<>))
+#endif
 
 ud1 :: R n -> Vector ℝ
 ud1 (R (Dim v)) = v