Add ghc-api-version.h from ghcide

Author: pepeiborra

Diff for: haskell-language-server.cabal

@@ -15,6 +15,7 @@ build-type:     Simple
 extra-source-files:
     README.md
     ChangeLog.md
+    include/ghc-api-version.h
 
 flag agpl
   Description: Enable AGPL dependencies
@@ -93,6 +94,8 @@ library
     , time
     , transformers
     , unordered-containers
+  include-dirs:
+        include
   if os(windows)
     build-depends:     Win32
   else

Diff for: include/ghc-api-version.h

@@ -0,0 +1,10 @@
+#ifndef GHC_API_VERSION_H
+#define GHC_API_VERSION_H
+
+#ifdef GHC_LIB
+#define MIN_GHC_API_VERSION(x,y,z) MIN_VERSION_ghc_lib(x,y,z)
+#else
+#define MIN_GHC_API_VERSION(x,y,z) MIN_VERSION_ghc(x,y,z)
+#endif
+
+#endif