Pass 'ghc-shared-options' to GHC during the linking phase.

See discussion in #3158.

Cabal/Distribution/Simple/GHC.hs

@@ -708,6 +708,8 @@ buildOrReplLib forRepl verbosity numJobs pkg_descr lbi lib clbi = do
                 ghcOptDynLinkMode        = toFlag GhcDynamicOnly,
                 ghcOptInputFiles         = toNubListR dynamicObjectFiles,
                 ghcOptOutputFile         = toFlag sharedLibFilePath,
+                ghcOptExtra              = toNubListR $
+                                           hcSharedOptions GHC libBi,
                 -- For dynamic libs, Mac OS/X needs to know the install location
                 -- at build time. This only applies to GHC < 7.8 - see the
                 -- discussion in #1660.

Cabal/Distribution/Simple/GHCJS.hs

@@ -464,6 +464,8 @@ buildOrReplLib forRepl verbosity numJobs _pkg_descr lbi lib clbi = do
                 ghcOptDynLinkMode        = toFlag GhcDynamicOnly,
                 ghcOptInputFiles         = toNubListR dynamicObjectFiles,
                 ghcOptOutputFile         = toFlag sharedLibFilePath,
+                ghcOptExtra              = toNubListR $
+                                           ghcjsSharedOptions libBi,
                 ghcOptNoAutoLinkPackages = toFlag True,
                 ghcOptPackageDBs         = withPackageDB lbi,
                 ghcOptPackages           = toNubListR $