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|
{
config,
lib,
stdenv,
makeWrapper,
runCommand,
wrapBintoolsWith,
wrapCCWith,
autoPatchelfHook,
llvmPackages,
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 =
fallback:
{
x86_64-apple-darwin = {
double = "darwin-x86_64";
};
x86_64-unknown-linux-gnu = {
double = "linux-x86_64";
};
arm64-apple-darwin = {
# the difference in `arm64` attribute vs `x86_64` double is purposeful.
# the Android NDK contains a single Universal 2 Darwin binary
# which supports arm64 and x86. The NDK was never updated to differentiate
# or unify architecture with its folder structure, so the binary supporting both architectures
# is stored under a single directory indicating `x86_64` despite also supporting darwin arm64.
double = "darwin-x86_64";
};
}
.${stdenv.buildPlatform.config} or fallback;
ndkTargetInfoFun =
fallback:
{
i686-unknown-linux-android = {
triple = "i686-linux-android";
arch = "x86";
};
x86_64-unknown-linux-android = {
triple = "x86_64-linux-android";
arch = "x86_64";
};
armv7a-unknown-linux-androideabi = {
arch = "arm";
triple = "arm-linux-androideabi";
};
aarch64-unknown-linux-android = {
arch = "arm64";
triple = "aarch64-linux-android";
};
}
.${stdenv.targetPlatform.config} or fallback;
buildInfo = ndkBuildInfoFun (
throw "Android NDK doesn't support building on ${stdenv.buildPlatform.config}, as far as we know"
);
targetInfo = ndkTargetInfoFun (
throw "Android NDK doesn't support targetting ${stdenv.targetPlatform.config}, as far as we know"
);
androidSdkVersion =
if
(stdenv.targetPlatform ? androidSdkVersion && stdenv.targetPlatform.androidSdkVersion != null)
then
stdenv.targetPlatform.androidSdkVersion
else
(throw "`androidSdkVersion` is not set during the importing of nixpkgs");
suffixSalt = lib.replaceStrings [ "-" "." ] [ "_" "_" ] stdenv.targetPlatform.config;
# targetInfo.triple is what Google thinks the toolchain should be, this is a little
# different from what we use. We make it four parts to conform with the existing
# standard more properly.
targetPrefix = lib.optionalString (stdenv.targetPlatform != stdenv.hostPlatform) (
stdenv.targetPlatform.config + "-"
);
in
if !config.allowAliases && (ndkBuildInfoFun null == null || ndkTargetInfoFun null == null) then
# Don't throw without aliases to not break CI.
null
else
lib.recurseIntoAttrs rec {
# Misc tools
binaries = stdenv.mkDerivation {
pname = "${targetPrefix}ndk-toolchain";
inherit (androidndk) version;
nativeBuildInputs = [
makeWrapper
]
++ lib.optionals stdenv.buildPlatform.isLinux [ autoPatchelfHook ];
propagatedBuildInputs = [ androidndk ];
passthru = {
inherit targetPrefix;
isClang = true; # clang based cc, but bintools ld
inherit (llvmPackages.clang.cc) hardeningUnsupportedFlagsByTargetPlatform;
};
dontUnpack = true;
dontBuild = true;
dontStrip = true;
dontConfigure = true;
dontPatch = true;
autoPatchelfIgnoreMissingDeps = stdenv.buildPlatform.isLinux;
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}/${androidSdkVersion} ]; then
echo "NDK does not contain libraries for SDK version ${androidSdkVersion}";
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}/${androidSdkVersion}/*.so $out/lib/
ln -s $out/toolchain/sysroot/usr/lib/${targetInfo.triple}/${androidSdkVersion}/*.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)
ln -sf $out/bin/yasm $out/bin/${targetPrefix}as
ln -sf $out/bin/yasm $out/bin/as
patchShebangs $out/bin
'';
meta = {
description = "Android NDK toolchain, tuned for other platforms";
license = with lib.licenses; [ unfree ];
teams = [ lib.teams.android ];
};
};
binutils = wrapBintoolsWith {
bintools = binaries;
libc = targetAndroidndkPkgs.libraries;
};
clang = wrapCCWith {
cc = binaries // {
# for packages expecting libcompiler-rt, etc. to come from here (stdenv.cc.cc.lib)
lib = targetAndroidndkPkgs.libraries;
};
bintools = binutils;
libc = targetAndroidndkPkgs.libraries;
extraBuildCommands = ''
echo "-D__ANDROID_API__=${stdenv.targetPlatform.androidSdkVersion}" >> $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}/${androidSdkVersion}
if [ ! -d $lpath ]; then
echo "NDK does not contain libraries for SDK version ${androidSdkVersion} <$lpath>"
exit 1
fi
mkdir -p $out/lib
cp $lpath/*.so $lpath/*.a $out/lib
chmod +w $out/lib/*
cp $lpath/* $out/lib
'';
}
|
