phonon: set paths for multiple outputs

phonon was not set up for multiple outputs; in fact, some of the single-output
paths were incorrect, such as the path to install Qt 5 plugins.

pkgs/development/libraries/phonon/default.nix

@@ -7,6 +7,9 @@ with lib;
 
 let
   v = "4.9.1";
+
+  soname = if withQt5 then "phonon4qt5" else "phonon";
+  buildsystemdir = "share/cmake/${soname}";
 in
 
 assert withQt5 -> qtbase != null;
@@ -36,17 +39,41 @@ stdenv.mkDerivation rec {
     [ cmake pkgconfig ]
     ++ optional withQt5 extra-cmake-modules;
 
+  outputs = [ "out" "dev" ];
+
   NIX_CFLAGS_COMPILE = "-fPIC";
 
   cmakeFlags =
     [ "-DCMAKE_BUILD_TYPE=${if debug then "Debug" else "Release"}" ]
     ++ optional withQt5 "-DPHONON_BUILD_PHONON4QT5=ON";
 
+  preConfigure = ''
+    cmakeFlags+=" -DPHONON_QT_MKSPECS_INSTALL_DIR=''${!outputDev}/mkspecs"
+    cmakeFlags+=" -DPHONON_QT_IMPORTS_INSTALL_DIR=''${!outputBin}/$qtQmlPrefix"
+    cmakeFlags+=" -DPHONON_QT_PLUGIN_INSTALL_DIR=''${!outputBin}/$qtPluginPrefix/designer"
+  '';
+
   postPatch = ''
     sed -i PhononConfig.cmake.in \
         -e "/get_filename_component(rootDir/ s/^.*$//" \
-        -e "/^set(PHONON_INCLUDE_DIR/ s,\''${rootDir},''${!outputDev}," \
-        -e "/^set(PHONON_LIBRARY_DIR/ s,\''${rootDir}/,," \
-        -e "/^set(PHONON_BUILDSYSTEM_DIR/ s,\''${rootDir},''${!outputDev},"
+        -e "/^set(PHONON_INCLUDE_DIR/ s|\''${rootDir}/||" \
+        -e "/^set(PHONON_LIBRARY_DIR/ s|\''${rootDir}/||" \
+        -e "/^set(PHONON_BUILDSYSTEM_DIR/ s|\''${rootDir}|''${!outputDev}|"
+
+    sed -i cmake/FindPhononInternal.cmake \
+        -e "/set(INCLUDE_INSTALL_DIR/ c set(INCLUDE_INSTALL_DIR \"''${!outputDev}/include\")"
+
+    ${optionalString withQt5 ''
+    sed -i cmake/FindPhononInternal.cmake \
+        -e "/set(PLUGIN_INSTALL_DIR/ c set(PLUGIN_INSTALL_DIR \"$qtPluginPrefix/..\")"
+    ''}
+
+    sed -i CMakeLists.txt \
+        -e "/set(BUILDSYSTEM_INSTALL_DIR/ c set(BUILDSYSTEM_INSTALL_DIR \"''${!outputDev}/${buildsystemdir}\")"
+  '';
+
+  postFixup = ''
+    sed -i "''${!outputDev}/lib/pkgconfig/${soname}.pc" \
+        -e "/^exec_prefix=/ c exec_prefix=''${!outputBin}/bin"
   '';
 }