about summary refs log tree commit diff
path: root/pkgs/development/androidndk-pkgs/androidndk-pkgs.nix
blob: a8b172f4eb5d2e8c6651aaa89fb75a75b0d2dee1 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
{ lib, stdenv, makeWrapper
, runCommand, wrapBintoolsWith, wrapCCWith, autoPatchelfHook
, buildAndroidndk, androidndk, targetAndroidndkPkgs
}:

let
  # Mapping from a platform to information needed to unpack NDK stuff for that
  # platform.
  #
  # N.B. The Android NDK uses slightly different LLVM-style platform triples
  # than we do. We don't just use theirs because ours are less ambiguous and
  # some builds need that clarity.
  #
  ndkBuildInfoFun = { config, ... }: {
    x86_64-apple-darwin = {
      double = "darwin-x86_64";
    };
    x86_64-unknown-linux-gnu = {
      double = "linux-x86_64";
    };
  }.${config} or
    (throw "Android NDK doesn't support building on ${config}, as far as we know");

  ndkTargetInfoFun = { config, ... }: {
    i686-unknown-linux-android = {
      triple = "i686-linux-android";
      arch = "x86";
    };
    x86_64-unknown-linux-android = {
      triple = "x86_64-linux-android";
      arch = "x86_64";
    };
    armv7a-unknown-linux-androideabi = {
      arch = "arm";
      triple = "arm-linux-androideabi";
    };
    aarch64-unknown-linux-android = {
      arch = "arm64";
      triple = "aarch64-linux-android";
    };
  }.${config} or
    (throw "Android NDK doesn't support targetting ${config}, as far as we know");

  buildInfo = ndkBuildInfoFun stdenv.buildPlatform;
  targetInfo = ndkTargetInfoFun stdenv.targetPlatform;

  inherit (stdenv.targetPlatform) sdkVer;
  suffixSalt = lib.replaceStrings ["-" "."] ["_" "_"] stdenv.targetPlatform.config;

  # targetInfo.triple is what Google thinks the toolchain should be, this is a little
  # different from what we use. We make it four parts to conform with the existing
  # standard more properly.
  targetPrefix = lib.optionalString (stdenv.targetPlatform != stdenv.hostPlatform) (stdenv.targetPlatform.config + "-");
in

rec {
  # Misc tools
  binaries = stdenv.mkDerivation {
    pname = "${targetPrefix}ndk-toolchain";
    inherit (androidndk) version;
    nativeBuildInputs = [ makeWrapper autoPatchelfHook ];
    propagatedBuildInputs = [ androidndk ];
    passthru = {
      inherit targetPrefix;
      isClang = true; # clang based cc, but bintools ld
    };
    dontUnpack = true;
    dontBuild = true;
    dontStrip = true;
    dontConfigure = true;
    dontPatch = true;
    autoPatchelfIgnoreMissingDeps = true;
    installPhase = ''
      # https://developer.android.com/ndk/guides/other_build_systems
      mkdir -p $out
      cp -r ${androidndk}/libexec/android-sdk/ndk-bundle/toolchains/llvm/prebuilt/${buildInfo.double} $out/toolchain
      find $out/toolchain -type d -exec chmod 777 {} \;

      if [ ! -d $out/toolchain/sysroot/usr/lib/${targetInfo.triple}/${sdkVer} ]; then
        echo "NDK does not contain libraries for SDK version ${sdkVer}";
        exit 1
      fi

      ln -vfs $out/toolchain/sysroot/usr/lib $out/lib
      ln -s $out/toolchain/sysroot/usr/lib/${targetInfo.triple}/*.so $out/lib/
      ln -s $out/toolchain/sysroot/usr/lib/${targetInfo.triple}/*.a $out/lib/
      chmod +w $out/lib/*
      ln -s $out/toolchain/sysroot/usr/lib/${targetInfo.triple}/${sdkVer}/*.so $out/lib/
      ln -s $out/toolchain/sysroot/usr/lib/${targetInfo.triple}/${sdkVer}/*.o $out/lib/

      echo "INPUT(-lc++_static)" > $out/lib/libc++.a

      ln -s $out/toolchain/bin $out/bin
      ln -s $out/toolchain/${targetInfo.triple}/bin/* $out/bin/
      for f in $out/bin/${targetInfo.triple}-*; do
        ln -s $f ''${f/${targetInfo.triple}-/${targetPrefix}}
      done
      for f in $(find $out/toolchain -type d -name ${targetInfo.triple}); do
        ln -s $f ''${f/${targetInfo.triple}/${targetPrefix}}
      done

      rm -f $out/bin/${targetPrefix}ld
      ln -s $out/bin/lld $out/bin/${targetPrefix}ld

      (cd $out/bin;
        for tool in llvm-*; do
          ln -sf $tool ${targetPrefix}$(echo $tool | sed 's/llvm-//')
          ln -sf $tool $(echo $tool | sed 's/llvm-//')
        done)

      # handle last, as llvm-as is for llvm bytecode
      ln -sf $out/bin/${targetInfo.triple}-as $out/bin/${targetPrefix}as
      ln -sf $out/bin/${targetInfo.triple}-as $out/bin/as

      patchShebangs $out/bin
    '';
  };

  binutils = wrapBintoolsWith {
    bintools = binaries;
    libc = targetAndroidndkPkgs.libraries;
  };

  clang = wrapCCWith {
    cc = binaries // {
      # for packages expecting libcompiler-rt, etc. to come from here (stdenv.cc.cc.lib)
      lib = targetAndroidndkPkgs.libraries;
    };
    bintools = binutils;
    libc = targetAndroidndkPkgs.libraries;
    extraBuildCommands = ''
      echo "-D__ANDROID_API__=${stdenv.targetPlatform.sdkVer}" >> $out/nix-support/cc-cflags
      # Android needs executables linked with -pie since version 5.0
      # Use -fPIC for compilation, and link with -pie if no -shared flag used in ldflags
      echo "-target ${targetInfo.triple} -fPIC" >> $out/nix-support/cc-cflags
      echo "-z,noexecstack -z,relro -z,now -z,muldefs" >> $out/nix-support/cc-ldflags
      echo 'expandResponseParams "$@"' >> $out/nix-support/add-flags.sh
      echo 'if [[ ! (" ''${params[@]} " =~ " -shared ") && ! (" ''${params[@]} " =~ " -no-pie ") ]]; then NIX_LDFLAGS_${suffixSalt}+=" -pie"; fi' >> $out/nix-support/add-flags.sh
      echo "-Xclang -mnoexecstack" >> $out/nix-support/cc-cxxflags
      if [ ${targetInfo.triple} == arm-linux-androideabi ]; then
        # https://android.googlesource.com/platform/external/android-cmake/+/refs/heads/cmake-master-dev/android.toolchain.cmake
        echo "--fix-cortex-a8" >> $out/nix-support/cc-ldflags
      fi
    '';
  };

  # Bionic lib C and other libraries.
  #
  # 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 = runCommand "bionic-prebuilt" {} ''
    lpath=${buildAndroidndk}/libexec/android-sdk/ndk-bundle/toolchains/llvm/prebuilt/${buildInfo.double}/sysroot/usr/lib/${targetInfo.triple}/${sdkVer}
    if [ ! -d $lpath ]; then
      echo "NDK does not contain libraries for SDK version ${sdkVer} <$lpath>"
      exit 1
    fi
    mkdir -p $out/lib
    cp $lpath/*.so $lpath/*.a $out/lib
    chmod +w $out/lib/*
    cp $lpath/* $out/lib
  '';
}