stdenv: Add updateAutoconfGnuConfigScriptsHook for aarch64

This is required for Aarch64 since a lot of source tarballs ship with
outdated configure scripts that don't recognize aarch64. Simply
replacing the config.guess and config.sub with new versions from
upstream makes them build again.

This same approach is used by at least Buildroot and Fedora. In
principle this could be enabled for all architectures but
conditionalizing this on aarch64 avoids a mass rebuild on x86.

pkgs/build-support/setup-hooks/update-autotools-gnu-config-scripts.sh

@@ -0,0 +1,12 @@
+preConfigurePhases+=" updateAutotoolsGnuConfigScriptsPhase"
+
+updateAutotoolsGnuConfigScriptsPhase() {
+    if [ -n "$dontUpdateAutotoolsGnuConfigScripts" ]; then return; fi
+
+    for script in config.sub config.guess; do
+        for f in $(find . -name "$script"); do
+            echo "Updating Autotools / GNU config script to a newer upstream version: $f"
+            cp -f "@gnu_config@/$script" "$f"
+        done
+    done
+}

pkgs/stdenv/adapters.nix

@@ -92,6 +92,7 @@ rec {
               # without proper `file` command, libtool sometimes fails
               # to recognize 64-bit DLLs
             ++ stdenv.lib.optional (cross.config  == "x86_64-w64-mingw32") pkgs.file
+            ++ stdenv.lib.optional (cross.config  == "aarch64-linux-gnu") pkgs.updateAutotoolsGnuConfigScriptsHook
             ;
 
           # Cross-linking dynamic libraries, every buildInput should

pkgs/stdenv/linux/default.nix

@@ -214,7 +214,9 @@ in
         isl = isl_0_14;
       };
     };
-    extraBuildInputs = [ prevStage.patchelf prevStage.paxctl ];
+    extraBuildInputs = [ prevStage.patchelf prevStage.paxctl ] ++
+      # Many tarballs come with obsolete config.sub/config.guess that don't recognize aarch64.
+      lib.optional (system == "aarch64-linux") prevStage.updateAutotoolsGnuConfigScriptsHook;
   })
 
 
@@ -241,7 +243,9 @@ in
         shell = self.bash + "/bin/bash";
       };
     };
-    extraBuildInputs = [ prevStage.patchelf prevStage.xz ];
+    extraBuildInputs = [ prevStage.patchelf prevStage.xz ] ++
+      # Many tarballs come with obsolete config.sub/config.guess that don't recognize aarch64.
+      lib.optional (system == "aarch64-linux") prevStage.updateAutotoolsGnuConfigScriptsHook;
   })
 
   # Construct the final stdenv.  It uses the Glibc and GCC, and adds
@@ -269,7 +273,9 @@ in
       initialPath =
         ((import ../common-path.nix) {pkgs = prevStage;});
 
-      extraBuildInputs = [ prevStage.patchelf prevStage.paxctl ];
+      extraBuildInputs = [ prevStage.patchelf prevStage.paxctl ] ++
+        # Many tarballs come with obsolete config.sub/config.guess that don't recognize aarch64.
+        lib.optional (system == "aarch64-linux") prevStage.updateAutotoolsGnuConfigScriptsHook;
 
       cc = prevStage.gcc;
 
@@ -288,7 +294,7 @@ in
         [ gzip bzip2 xz bash binutils coreutils diffutils findutils gawk
           glibc gnumake gnused gnutar gnugrep gnupatch patchelf attr acl
           paxctl zlib pcre linuxHeaders ed gcc gcc.cc libsigsegv
-        ];
+        ] ++ lib.optional (system == "aarch64-linux") prevStage.updateAutotoolsGnuConfigScriptsHook;
         */
 
       overrides = self: super: {

pkgs/top-level/all-packages.nix

@@ -79,6 +79,10 @@ with pkgs;
       }
     '');
 
+  updateAutotoolsGnuConfigScriptsHook = makeSetupHook
+    { substitutions = { gnu_config = gnu-config;}; }
+    ../build-support/setup-hooks/update-autotools-gnu-config-scripts.sh;
+
   buildEnv = callPackage ../build-support/buildenv { }; # not actually a package
 
   buildFHSUserEnv = callPackage ../build-support/build-fhs-userenv { };