Prevent attempted building on GHC 7.8 (it doesn't work) and fix the b…

…uild on 7.10 with a conditional semigroups dependency
PaulJohnson · Jun 21, 2018 · f89cca4 · f89cca4
1 parent 4442dc4
commit f89cca4
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/geodetics.cabal b/geodetics.cabal
@@ -30,9 +30,11 @@ source-repository head
 library
   hs-source-dirs:  src
   build-depends:   
-                   base >= 4.6 && < 5,
+                   base >= 4.7 && < 5,
                    dimensional >= 1.0,
                    array >= 0.4
+  if !impl(ghc>=8.0)
+    build-depends: semigroups >= 0.9 && < 0.19
   ghc-options:     -Wall
   exposed-modules: 
                    Geodetics.Altitude,