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
'';
}
|
