Add extraLibDirs to runtime lib search paths of library

Cabal/src/Distribution/Simple/GHC/BuildGeneric.hs

@@ -518,7 +518,7 @@ gbuild verbosity numJobs pkg_descr lbi bm clbi = do
           }
       dynLinkerOpts =
         mempty
-          { ghcOptRPaths = rpaths
+          { ghcOptRPaths = rpaths <> toNubListR (extraLibDirs bnfo)
           , ghcOptInputFiles =
               toNubListR
                 [tmpDir </> x | x <- cLikeObjs ++ cxxObjs ++ cmmObjs ++ asmObjs]

Cabal/src/Distribution/Simple/GHC/BuildOrRepl.hs

@@ -474,7 +474,7 @@ buildOrReplLib mReplFlags verbosity numJobs pkg_descr lbi lib clbi = do
               , ghcOptLinkFrameworks = toNubListR $ PD.frameworks libBi
               , ghcOptLinkFrameworkDirs =
                   toNubListR $ PD.extraFrameworkDirs libBi
-              , ghcOptRPaths = rpaths
+              , ghcOptRPaths = rpaths <> toNubListR (extraLibDirs libBi)
               }
           ghcStaticLinkArgs =
             mempty

Cabal/src/Distribution/Simple/Program/GHC.hs

@@ -778,10 +778,7 @@ renderGhcOptions comp _platform@(Platform _arch os) opts
             else []
         , ["-no-hs-main" | flagBool ghcOptLinkNoHsMain]
         , ["-dynload deploy" | not (null (flags ghcOptRPaths))]
-        , concat
-            [ ["-optl-Wl,-rpath," ++ dir]
-            | dir <- flags ghcOptRPaths
-            ]
+        , ["-optl-Wl,-rpath," ++ dir | dir <- flags ghcOptRPaths]
         , flags ghcOptLinkModDefFiles
         , -------------
           -- Packages

cabal-testsuite/PackageTests/LinkerOptions/T7339/T19350.script

@@ -0,0 +1,3 @@
+import Hello
+hello
+:q

cabal-testsuite/PackageTests/LinkerOptions/T7339/clib/lib.c

@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+void hello_world(void) {
+  printf("hello world!");
+}
+

cabal-testsuite/PackageTests/LinkerOptions/T7339/lib/Hello.hs

@@ -0,0 +1,3 @@
+module Hello (hello) where
+
+foreign import ccall "hello_world" hello :: IO ()

cabal-testsuite/PackageTests/LinkerOptions/T7339/lib/Setup.hs

@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain

cabal-testsuite/PackageTests/LinkerOptions/T7339/lib/T7339.cabal

@@ -0,0 +1,11 @@
+cabal-version: >=1.10
+name: T7339
+version: 1.0
+build-type: Simple
+
+library
+  build-depends: base
+  exposed-modules: Hello
+  default-language: Haskell2010
+  extra-libraries: hello
+

cabal-testsuite/PackageTests/LinkerOptions/T7339/setup.out

@@ -0,0 +1,6 @@
+# Setup configure
+# Setup build
+Preprocessing library for T7339-1.0...
+Building library for T7339-1.0...
+# Setup register
+Registering library for T7339-1.0...

cabal-testsuite/PackageTests/LinkerOptions/T7339/setup.test.hs

@@ -0,0 +1,67 @@
+-- Test for #19350, #7339 originally by @bgamari
+-- =============================================
+--
+-- The plan
+-- ---------
+-- We build a C shared library (`libhello`, contained in ./clib) and then build
+-- a Haskell library (`T19350-lib`, in ./lib) which depends upon it via `foreign
+-- import`. We make sure that the libhello shared object can only be found via
+-- the extra-lib-dirs from the package database registration (which we do by
+-- moving libhello.so from its original place).
+--
+-- Finally, we enter GHCi, load the Haskell library, and try to use it to call
+-- into libhello.
+
+import System.Directory
+import Distribution.System
+import Test.Cabal.Prelude
+
+
+main = setupTest $ do
+
+  skipIfWindows
+  skipUnlessGhcVersion ">= 8.4"
+
+  withPackageDb $ do
+    cwd  <- takeDirectory . testCurrentDir <$> getTestEnv
+    plat <- testPlatform <$> getTestEnv
+    let libExt = case plat of
+          Platform _ OSX     -> "dylib"
+          Platform _ Windows -> "dll"
+          Platform _ _other  -> "so"
+
+
+    -- Link a C program against the library
+    _ <- runProgramM ghcProgram
+        [ "-fPIC", "-c", "clib/lib.c"
+        , "-o", "clib/lib.o" ]
+        Nothing
+    _ <- runProgramM ghcProgram
+        [ "-shared", "-no-hs-main", "clib/lib.o"
+        , "-o", "clib/libhello" <.> libExt ]
+        Nothing
+
+    withDirectory "lib" $ do
+      setup "configure" ["-v0"
+                        , "--extra-lib-dirs=" ++ (cwd </> "clib")
+                        , "--extra-lib-dirs=" ++ (cwd </> "clib-install")
+                        , "--disable-library-vanilla"
+                        , "--enable-shared"]
+      setup "build" []
+      setup "register" ["--inplace"]
+
+    -- Move libhello from its original place to ensure it isn't found via RPATH
+    liftIO $ do
+      createDirectoryIfMissing False (cwd </> "clib-install")
+      copyFile (cwd </> "clib/libhello" <.> libExt) ( cwd </> "clib-install/libhello" <.> libExt)
+      removeFile (cwd </> "clib/libhello" <.> libExt)
+
+    pkgDb <- testPackageDbDir <$> getTestEnv
+    ghciScript <- liftIO $ readFile (cwd </> "T19350.script")
+    _ <- runProgramM ghcProgram
+         [ "--interactive"
+         , "-package", "T7339"
+         , "-package-db", pkgDb
+         ] (Just ghciScript)
+
+    return ()