stdenv: Move some logic from cross adapter to stdenv proper

Eventually the adapter will be removed.  Moved is

 - Name suffix from hostPlatform

 - configurePlatforms

   To not cause more breakage, the default is currently [], but
   eventually it will be [ "build" "host" ], as the cross adapter makes
   it today.

pkgs/stdenv/adapters.nix

@@ -73,15 +73,8 @@ rec {
     };
   in stdenv // {
     mkDerivation =
-      { name ? "", buildInputs ? [], nativeBuildInputs ? []
+      { buildInputs ? [], nativeBuildInputs ? []
       , propagatedBuildInputs ? [], propagatedNativeBuildInputs ? []
-      , # Disabling the tests by default when cross compiling, as usually the
-        # tests rely on being able to run produced binaries.
-        doCheck ? false
-      , configureFlags ? []
-      , # Target is not included by default because most programs don't care.
-        # Including it then would cause needless massive rebuilds.
-        configurePlatforms   ? args.crossAttrs.configurePlatforms   or [ "build" "host" ]
       , selfNativeBuildInput ? args.crossAttrs.selfNativeBuildInput or false
       , ...
       } @ args:
@@ -106,7 +99,6 @@ rec {
         nativeInputsFromBuildInputs = stdenv.lib.filter hostAsNativeDrv buildInputsNotNull;
       in
         stdenv.mkDerivation (args // {
-          name = name + "-" + hostPlatform.config;
           nativeBuildInputs = nativeBuildInputs
             ++ nativeInputsFromBuildInputs
             ++ stdenv.lib.optional selfNativeBuildInput nativeDrv
@@ -116,15 +108,6 @@ rec {
             ++ stdenv.lib.optional (hostPlatform.config == "aarch64-linux-gnu") pkgs.updateAutotoolsGnuConfigScriptsHook
             ;
 
-          inherit doCheck;
-
-          # This parameter is sometimes a string and sometimes a list, yuck
-          configureFlags = let inherit (stdenv.lib) optional elem; in
-            (if stdenv.lib.isString configureFlags then [configureFlags] else configureFlags)
-            ++ optional (elem "build"  configurePlatforms) "--build=${buildPlatform.config}"
-            ++ optional (elem "host"   configurePlatforms) "--host=${hostPlatform.config}"
-            ++ optional (elem "target" configurePlatforms) "--target=${targetPlatform.config}";
-
           # Cross-linking dynamic libraries, every buildInput should
           # be propagated because ld needs the -rpath-link to find
           # any library needed to link the program dynamically at

pkgs/stdenv/generic/make-derivation.nix

@@ -12,12 +12,22 @@ rec {
   # * https://nixos.org/nix/manual/#ssec-derivation
   #   Explanation about derivations in general
   mkDerivation =
-    { nativeBuildInputs ? []
+    { name ? ""
+
+    , nativeBuildInputs ? []
     , buildInputs ? []
 
     , propagatedNativeBuildInputs ? []
     , propagatedBuildInputs ? []
 
+    , configureFlags ? []
+    , # Target is not included by default because most programs don't care.
+      # Including it then would cause needless mass rebuilds.
+      #
+      # TODO(@Ericson2314): Make [ "build" "host" ] always the default.
+      configurePlatforms ? lib.optionals
+        (stdenv.hostPlatform != stdenv.buildPlatform)
+        [ "build" "host" ]
     , crossConfig ? null
     , meta ? {}
     , passthru ? {}
@@ -72,6 +82,9 @@ rec {
             lib.unique (lib.concatMap (input: input.__propagatedImpureHostDeps or []) (lib.concatLists propagatedDependencies'));
         in
         {
+          name = name + lib.optionalString
+            (stdenv.hostPlatform != stdenv.buildPlatform)
+            stdenv.hostPlatform.config;
           builder = attrs.realBuilder or stdenv.shell;
           args = attrs.args or ["-e" (attrs.builder or ./default-builder.sh)];
           inherit stdenv;
@@ -84,6 +97,14 @@ rec {
 
           propagatedNativeBuildInputs = lib.elemAt propagatedDependencies' 0;
           propagatedBuildInputs = lib.elemAt propagatedDependencies' 1;
+
+          # This parameter is sometimes a string and sometimes a list, yuck
+          configureFlags = let inherit (lib) optional elem; in
+            (if lib.isString configureFlags then [configureFlags] else configureFlags)
+            ++ optional (elem "build"  configurePlatforms) "--build=${stdenv.buildPlatform.config}"
+            ++ optional (elem "host"   configurePlatforms) "--host=${stdenv.hostPlatform.config}"
+            ++ optional (elem "target" configurePlatforms) "--target=${stdenv.targetPlatform.config}";
+
         } // lib.optionalAttrs (stdenv.buildPlatform.isDarwin) {
           # TODO: remove lib.unique once nix has a list canonicalization primitive
           __sandboxProfile =