librttopo,libspatialite: fix cross compilation (#447241)

pkgs/by-name/li/librttopo/package.nix

@@ -27,11 +27,14 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [
     autoreconfHook
     validatePkgConfig
-    geos # for geos-config
   ];
 
   buildInputs = [ geos ];
 
+  configureFlags = [
+    "--with-geosconfig=${lib.getExe' (lib.getDev geos) "geos-config"}"
+  ];
+
   enableParallelBuilding = true;
 
   meta = with lib; {

pkgs/by-name/li/libspatialite/package.nix

@@ -45,7 +45,6 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [
     pkg-config
     validatePkgConfig
-    geos # for geos-config
   ];
 
   buildInputs = [
@@ -62,6 +61,10 @@ stdenv.mkDerivation (finalAttrs: {
     libiconv
   ];
 
+  configureFlags = [
+    "--with-geosconfig=${lib.getExe' (lib.getDev geos) "geos-config"}"
+  ];
+
   enableParallelBuilding = true;
 
   postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''