Don't insert rts options stanza imports for library

Author: Kleidukos

cabal-install/src/Distribution/Client/Init/FileCreators.hs

@@ -75,14 +75,15 @@ writeProject (ProjectSettings opts pkgDesc libTarget exeTarget testTarget)
           commonStanza = mkCommonStanza opts
           extensionsStanza = mkExtensionsStanza opts
           ghcOptionsStanza = mkGhcOptionsStanza opts
+          rtsOptionsStanza = mkRtsOptionsStanza opts
 
       libStanza <- prepareLibTarget opts libTarget
       exeStanza <- prepareExeTarget opts exeTarget
       testStanza <- prepareTestTarget opts testTarget
 
       (reusedCabal, cabalContents) <-
         writeCabalFile opts $
-          pkgFields ++ [extensionsStanza, ghcOptionsStanza, commonStanza, libStanza, exeStanza, testStanza]
+          pkgFields ++ [extensionsStanza, ghcOptionsStanza, rtsOptionsStanza, commonStanza, libStanza, exeStanza, testStanza]
 
       when (null $ _pkgSynopsis pkgDesc) $
         message opts T.Warning "No synopsis given. You should edit the .cabal file and add one."

cabal-install/src/Distribution/Client/Init/Format.hs

@@ -189,15 +189,21 @@ insertCommonStanzas opts =
           ["Common compiler warnings and optimisations"]
           False
           opts
-      , field
+      ]
+
+insertRtsOptionsStanza :: WriteOpts -> [PrettyField FieldAnnotation]
+insertRtsOptionsStanza opts =
+  case specHasCommonStanzas $ _optCabalSpec opts of
+    NoCommonStanzas -> [PrettyEmpty]
+    _ ->
+      [ field
           "import"
           (hsep . map text)
           ["rts-options"]
           ["Common RTS options"]
           False
           opts
       ]
-
 mkLibStanza :: WriteOpts -> LibTarget -> PrettyField FieldAnnotation
 mkLibStanza opts (LibTarget srcDirs lang expMods otherMods exts deps tools) =
   PrettySection
@@ -264,6 +270,7 @@ mkExeStanza opts (ExeTarget exeMain appDirs lang otherMods exts deps tools) =
     (toUTF8BS "executable")
     [exeName]
     ( insertCommonStanzas opts
+        ++ insertRtsOptionsStanza opts
         ++ [ field
               "main-is"
               unsafeFromHs
@@ -325,6 +332,7 @@ mkTestStanza opts (TestTarget testMain dirs lang otherMods exts deps tools) =
     (toUTF8BS "test-suite")
     [suiteName]
     ( insertCommonStanzas opts
+        ++ insertRtsOptionsStanza opts
         ++ [ case specHasCommonStanzas $ _optCabalSpec opts of
               NoCommonStanzas -> PrettyEmpty
               _ ->