Initial attempt to restore Android NDK cross building

pkgs/development/androidndk-pkgs/androidndk-pkgs.nix

@@ -38,14 +38,16 @@ let
 
   hostInfo = ndkInfoFun stdenv.hostPlatform;
   targetInfo = ndkInfoFun stdenv.targetPlatform;
-
 in
 
 rec {
   # Misc tools
   binaries = let
       ndkBinDir =
-        "${androidndk}/libexec/${androidndk.name}/toolchains/${targetInfo.triple}-${targetInfo.gccVer}/prebuilt/${hostInfo.double}/bin";
+        "${androidndk}/libexec/android-sdk/ndk-bundle/toolchains/${targetInfo.triple}-${targetInfo.gccVer}/prebuilt/${hostInfo.double}/bin";
+      ndkGCCLibDir =
+        "${androidndk}/libexec/android-sdk/ndk-bundle/toolchains/${targetInfo.triple}-${targetInfo.gccVer}/prebuilt/${hostInfo.double}/lib/gcc/${targetInfo.triple}/4.9.x";
+
     in runCommand "ndk-gcc-binutils" {
       isGNU = true; # for cc-wrapper
       nativeBuildInputs = [ makeWrapper ];
@@ -54,8 +56,15 @@ rec {
       mkdir -p $out/bin
       for prog in ${ndkBinDir}/${targetInfo.triple}-*; do
         prog_suffix=$(basename $prog | sed 's/${targetInfo.triple}-//')
-        ln -s $prog $out/bin/${stdenv.targetPlatform.config}-$prog_suffix
+        cat > $out/bin/${stdenv.targetPlatform.config}-$prog_suffix <<EOF
+      #! ${stdenv.shell} -e
+      $prog "\$@"
+      EOF
+        chmod +x $out/bin/${stdenv.targetPlatform.config}-$prog_suffix
       done
+
+      ln -s $out/bin/${stdenv.targetPlatform.config}-ld $out/bin/ld
+      ln -s ${ndkGCCLibDir} $out/lib
     '';
 
   binutils = wrapBintoolsWith {
@@ -109,18 +118,16 @@ rec {
   # anyways.
   libraries =
     let
-      includePath = if buildAndroidndk.version == "10e" then
-          "${buildAndroidndk}/libexec/${buildAndroidndk.name}/platforms/android-${stdenv.hostPlatform.sdkVer}/arch-${hostInfo.arch}/usr/include/"
-        else
-          "${buildAndroidndk}/libexec/${buildAndroidndk.name}/sysroot/usr/include";
-      libPath = "${buildAndroidndk}/libexec/${buildAndroidndk.name}/platforms/android-${stdenv.hostPlatform.sdkVer}/arch-${hostInfo.arch}/usr/lib/";
+      includePath = "${buildAndroidndk}/libexec/android-sdk/ndk-bundle/sysroot/usr/include";
+      asmIncludePath = "${buildAndroidndk}/libexec/android-sdk/ndk-bundle/sysroot/usr/include/${targetInfo.triple}";
+      libPath = "${buildAndroidndk}/libexec/android-sdk/ndk-bundle/platforms/android-${stdenv.hostPlatform.sdkVer}/arch-${hostInfo.arch}/usr/lib/";
     in
     runCommand "bionic-prebuilt" {} ''
       mkdir -p $out
       cp -r ${includePath} $out/include
+      chmod u+w $out/include
+      cp -r ${asmIncludePath}/* $out/include
       chmod +w $out/include
-      ${lib.optionalString (lib.versionOlder "10e" buildAndroidndk.version)
-        "ln -s $out/include/${hostInfo.triple}/asm $out/include/asm"}
       ln -s ${libPath} $out/lib
     '';
 }

pkgs/development/androidndk-pkgs/default.nix

@@ -3,34 +3,32 @@
 }:
 
 rec {
+  "18b" =
+    let
+      ndkVersion = "18.1.5063045";
 
-  "17c" = import ./androidndk-pkgs.nix {
-    inherit (buildPackages)
-      makeWrapper;
-    inherit (pkgs)
-      lib stdenv
-      runCommand wrapBintoolsWith wrapCCWith;
-    # buildPackages.foo rather than buildPackages.buildPackages.foo would work,
-    # but for splicing messing up on infinite recursion for the variants we
-    # *dont't* use. Using this workaround, but also making a test to ensure
-    # these two really are the same.
-    buildAndroidndk = buildPackages.buildPackages.androidenv.androidndk_17c;
-    androidndk = androidenv.androidndk_17c;
-    targetAndroidndkPkgs = targetPackages.androidndkPkgs_17c;
-  };
+      buildAndroidComposition = buildPackages.buildPackages.androidenv.composeAndroidPackages {
+        includeNDK = true;
+        inherit ndkVersion;
+      };
 
-  "10e" = import ./androidndk-pkgs.nix {
-    inherit (buildPackages)
-      makeWrapper;
-    inherit (pkgs)
-      lib stdenv
-      runCommand wrapBintoolsWith wrapCCWith;
-    # buildPackages.foo rather than buildPackages.buildPackages.foo would work,
-    # but for splicing messing up on infinite recursion for the variants we
-    # *dont't* use. Using this workaround, but also making a test to ensure
-    # these two really are the same.
-    buildAndroidndk = buildPackages.buildPackages.androidenv.androidndk_10e;
-    androidndk = androidenv.androidndk_10e;
-    targetAndroidndkPkgs = targetPackages.androidndkPkgs_10e;
-  };
+      androidComposition = androidenv.composeAndroidPackages {
+        includeNDK = true;
+        inherit ndkVersion;
+      };
+    in
+    import ./androidndk-pkgs.nix {
+      inherit (buildPackages)
+        makeWrapper;
+      inherit (pkgs)
+        lib stdenv
+        runCommand wrapBintoolsWith wrapCCWith;
+      # buildPackages.foo rather than buildPackages.buildPackages.foo would work,
+      # but for splicing messing up on infinite recursion for the variants we
+      # *dont't* use. Using this workaround, but also making a test to ensure
+      # these two really are the same.
+      buildAndroidndk = buildAndroidComposition.ndk-bundle;
+      androidndk = androidComposition.ndk-bundle;
+      targetAndroidndkPkgs = targetPackages.androidndkPkgs_18b;
+    };
 }