Use LLVM C++ standard library

packages.nix

@@ -23,7 +23,7 @@ in rec {
   genode-base-nova = genode.base-nova;
   genode-os = genode.os;
   libc = callPackage ./pkgs/libc { inherit depot; };
-  stdcxx = callPackage ./pkgs/stdcxx { inherit depot; };
+  stdcxx = callPackage ./pkgs/stdcxx { };
 
   dhallGenode = dhallPackages.genode;
   dhallPrelude = dhallPackages.prelude;

pkgs/stdcxx/default.nix

@@ -18,8 +18,8 @@ in stdenv.mkDerivation rec {
   dontBuild = true;
 
   installPhase = ''
-    cflags=$NIX_CXXSTDLIB_COMPILE \
-      substituteAll ${./stdcxx.pc} ${pname}.pc
+    cflags=$NIX_CXXSTDLIB_COMPILE libs=$NIX_CXXSTDLIB_LINK \
+    	substituteAll ${./stdcxx.pc} ${pname}.pc
     mkdir -p $out/lib/pkgconfig
     install -Dm444 *.pc $out/lib/pkgconfig
   '';

pkgs/stdcxx/stdcxx.pc

@@ -3,3 +3,4 @@ Description: Genode Standard C++ library
 Version: @version@
 Requires: libc libm
 Cflags:  @cflags@
+Libs: @libs@