androidndk: fixup mess

New android ndk (18) now uses clang. We were going through the wrapper
that are provided. This lead to surprising errors when building.
Ideally we could use the llvm linker as well, but this leads to errors
as many packages don’t support the llvm linker.

lib/systems/examples.nix

@@ -44,14 +44,6 @@ rec {
     platform = platforms.aarch64-multiplatform;
   };
 
-  armv5te-android-prebuilt = rec {
-    config = "armv5tel-unknown-linux-androideabi";
-    sdkVer = "21";
-    ndkVer = "18b";
-    platform = platforms.armv5te-android;
-    useAndroidPrebuilt = true;
-  };
-
   armv7a-android-prebuilt = rec {
     config = "armv7a-unknown-linux-androideabi";
     sdkVer = "24";

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

@@ -18,19 +18,28 @@ let
     "x86_64-unknown-linux-gnu" = {
       double = "linux-x86_64";
     };
-    "armv5tel-unknown-linux-androideabi" = {
-      arch = "arm";
-      triple = "arm-linux-androideabi";
-      gccVer = "4.8";
+    "i686-unknown-linux-android" = {
+      triple = "i686-linux-android";
+      arch = "x86";
+      toolchain = "x86";
+      gccVer = "4.9";
+    };
+    "x86_64-unknown-linux-android" = {
+      triple = "x86_64-linux-android";
+      arch = "x86_64";
+      toolchain = "x86";
+      gccVer = "4.9";
     };
     "armv7a-unknown-linux-androideabi" = {
       arch = "arm";
       triple = "arm-linux-androideabi";
+      toolchain = "arm-linux-androideabi";
       gccVer = "4.9";
     };
     "aarch64-unknown-linux-android" = {
       arch = "arm64";
       triple = "aarch64-linux-android";
+      toolchain = "aarch64-linux-android";
       gccVer = "4.9";
     };
   }.${config} or
@@ -38,49 +47,49 @@ let
 
   hostInfo = ndkInfoFun stdenv.hostPlatform;
   targetInfo = ndkInfoFun stdenv.targetPlatform;
+
+  prefix = stdenv.lib.optionalString (stdenv.targetPlatform != stdenv.hostPlatform) (stdenv.targetPlatform.config + "-");
 in
 
 rec {
   # Misc tools
-  binaries = let
-      ndkBinDir =
-        "${androidndk}/libexec/android-sdk/ndk-bundle/toolchains/${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
+  binaries = runCommand "ndk-gcc-binutils" {
+    isClang = true; # clang based cc, but bintools ld
     nativeBuildInputs = [ makeWrapper ];
     propgatedBuildInputs = [ androidndk ];
   } ''
     mkdir -p $out/bin
-      for prog in ${ndkBinDir}/${targetInfo.triple}-*; do
-        prog_suffix=$(basename $prog | sed 's/${targetInfo.triple}-//')
-        cat > $out/bin/${stdenv.targetPlatform.config}-$prog_suffix <<EOF
-      #! ${stdenv.shell} -e
-      $prog "\$@"
-      EOF
-        chmod +x $out/bin/${stdenv.targetPlatform.config}-$prog_suffix
+
+    # llvm toolchain
+    for prog in ${androidndk}/libexec/android-sdk/ndk-bundle/toolchains/llvm/prebuilt/${hostInfo.double}/bin/*; do
+      ln -s $prog $out/bin/$(basename $prog)
+      ln -s $prog $out/bin/${prefix}$(basename $prog)
     done
 
-      ln -s $out/bin/${stdenv.targetPlatform.config}-ld $out/bin/ld
-      ln -s ${ndkGCCLibDir} $out/lib
+    # bintools toolchain
+    for prog in ${androidndk}/libexec/android-sdk/ndk-bundle/toolchains/${targetInfo.toolchain}-${targetInfo.gccVer}/prebuilt/${hostInfo.double}/bin/*; do
+      prog_suffix=$(basename $prog | sed 's/${targetInfo.triple}-//')
+      ln -s $prog $out/bin/${stdenv.targetPlatform.config}-$prog_suffix
+    done
+
+    # shitty googly wrappers
+    rm -f $out/bin/${stdenv.targetPlatform.config}-gcc $out/bin/${stdenv.targetPlatform.config}-g++
   '';
 
   binutils = wrapBintoolsWith {
     bintools = binaries;
     libc = targetAndroidndkPkgs.libraries;
-    extraBuildCommands = ''
-      echo "--build-id" >> $out/nix-support/libc-ldflags
-    '';
   };
 
-  gcc = wrapCCWith {
+  clang = wrapCCWith {
     cc = binaries;
     bintools = binutils;
     libc = targetAndroidndkPkgs.libraries;
     extraBuildCommands = ''
       echo "-D__ANDROID_API__=${stdenv.targetPlatform.sdkVer}" >> $out/nix-support/cc-cflags
+      echo "-target ${stdenv.targetPlatform.config}" >> $out/nix-support/cc-cflags
+      echo "-resource-dir=$(echo ${androidndk}/libexec/android-sdk/ndk-bundle/toolchains/llvm/prebuilt/${hostInfo.double}/lib*/clang/*)" >> $out/nix-support/cc-cflags
+      echo "--gcc-toolchain=${androidndk}/libexec/android-sdk/ndk-bundle/toolchains/${targetInfo.toolchain}-${targetInfo.gccVer}/prebuilt/${hostInfo.double}" >> $out/nix-support/cc-cflags
     ''
     + lib.optionalString stdenv.targetPlatform.isAarch32 (let
         p =  stdenv.targetPlatform.platform.gcc or {}
@@ -98,16 +107,10 @@ rec {
         sed -E -i \
           $out/bin/${stdenv.targetPlatform.config}-cc \
           $out/bin/${stdenv.targetPlatform.config}-c++ \
-          $out/bin/${stdenv.targetPlatform.config}-gcc \
-          $out/bin/${stdenv.targetPlatform.config}-g++ \
+          $out/bin/${stdenv.targetPlatform.config}-clang \
+          $out/bin/${stdenv.targetPlatform.config}-clang++ \
           -e 's|^(extraBefore=)\((.*)\)$|\1(\2 -Wl,--fix-cortex-a8 ${builtins.toString flags})|'
-      '')
-      # GCC 4.9 is the first relase with "-fstack-protector"
-      + lib.optionalString (lib.versionOlder targetInfo.gccVer "4.9") ''
-        sed -E \
-        -i $out/nix-support/add-hardening.sh \
-        -e 's|(-fstack-protector)-strong|\1|g'
-      '';
+      '');
   };
 
   # Bionic lib C and other libraries.
@@ -115,17 +118,11 @@ rec {
   # We use androidndk from the previous stage, else we waste time or get cycles
   # cross-compiling packages to wrap incorrectly wrap binaries we don't include
   # anyways.
-  libraries =
-    let
-      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" {} ''
+  libraries = runCommand "bionic-prebuilt" {} ''
     mkdir -p $out
-      cp -r ${includePath} $out/include
+    cp -r ${buildAndroidndk}/libexec/android-sdk/ndk-bundle/sysroot/usr/include $out/include
     chmod +w $out/include
-      cp -r ${asmIncludePath}/* $out/include
-      ln -s ${libPath} $out/lib
+    cp -r ${buildAndroidndk}/libexec/android-sdk/ndk-bundle/sysroot/usr/include/${targetInfo.triple}/* $out/include
+    ln -s ${buildAndroidndk}/libexec/android-sdk/ndk-bundle/platforms/android-${stdenv.hostPlatform.sdkVer}/arch-${hostInfo.arch}/usr/lib $out/lib
   '';
 }

pkgs/stdenv/cross/default.nix

@@ -53,7 +53,7 @@ in lib.init bootStages ++ [
       cc = if crossSystem.useiOSPrebuilt or false
              then buildPackages.darwin.iosSdkPkgs.clang
            else if crossSystem.useAndroidPrebuilt or false
-             then buildPackages."androidndkPkgs_${crossSystem.ndkVer}".gcc
+             then buildPackages."androidndkPkgs_${crossSystem.ndkVer}".clang
            else if crossSystem.useLLVM or false
              then buildPackages.llvmPackages_7.lldClang
            else buildPackages.gcc;