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|
{ 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.
#
# FIXME:
# There's some dragons here. Build host and target concepts are being mixed up.
ndkInfoFun = { config, ... }: {
x86_64-apple-darwin = {
double = "darwin-x86_64";
};
x86_64-unknown-linux-gnu = {
double = "linux-x86_64";
};
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 ${config}, as far as we know");
buildInfo = ndkInfoFun stdenv.buildPlatform;
hostInfo = ndkInfoFun stdenv.hostPlatform;
targetInfo = ndkInfoFun stdenv.targetPlatform;
inherit (stdenv.targetPlatform) sdkVer;
suffixSalt = lib.replaceStrings ["-" "."] ["_" "_"] stdenv.targetPlatform.config;
# targetInfo.triple is what Google thinks the toolchain should be, this is a little
# different from what we use. We make it four parts to conform with the existing
# standard more properly.
targetPrefix = lib.optionalString (stdenv.targetPlatform != stdenv.hostPlatform) (stdenv.targetPlatform.config + "-");
in
rec {
# Misc tools
binaries = stdenv.mkDerivation {
pname = "${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
'';
}
|