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|
{ lib, hostPlatform, targetPlatform
, makeWrapper
, runCommand, wrapBintoolsWith, wrapCCWith
, 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.
ndkInfoFun = { config, ... }: {
"x86_64-unknown-linux-gnu" = {
double = "linux-x86_64";
};
"arm-unknown-linux-androideabi" = {
arch = "arm";
triple = "arm-linux-androideabi";
gccVer = "4.8";
};
"aarch64-unknown-linux-android" = {
arch = "arm64";
triple = "aarch64-linux-android";
gccVer = "4.9";
};
}.${config} or
(throw "Android NDK doesn't support ${config}, as far as we know");
hostInfo = ndkInfoFun hostPlatform;
targetInfo = ndkInfoFun targetPlatform;
in
rec {
# Misc tools
binaries = let
ndkBinDir =
"${androidndk}/libexec/${androidndk.name}/toolchains/${targetInfo.triple}-${targetInfo.gccVer}/prebuilt/${hostInfo.double}/bin";
in runCommand "ndk-gcc-binutils" {
isGNU = true; # for cc-wrapper
nativeBuildInputs = [ makeWrapper ];
propgatedBuildInputs = [ androidndk ];
} ''
mkdir -p $out/bin
for prog in ${ndkBinDir}/${targetInfo.triple}-*; do
prog_suffix=$(basename $prog | sed 's/${targetInfo.triple}-//')
ln -s $prog $out/bin/${targetPlatform.config}-$prog_suffix
done
'';
binutils = wrapBintoolsWith {
bintools = binaries;
libc = targetAndroidndkPkgs.libraries;
};
gcc = wrapCCWith {
cc = binaries;
bintools = binutils;
libc = targetAndroidndkPkgs.libraries;
extraBuildCommands =
# GCC 4.9 is the first relase with "-fstack-protector"
lib.optionalString (lib.versionOlder targetInfo.gccVer "4.9") ''
sed -E \
-i $out/nix-support/add-hardening.sh \
-e 's|(-fstack-protector)-strong|\1|g'
'';
};
# Bionic lib C and other libraries.
#
# We use androidndk from the previous stage, else we waste time or get cycles
# cross-compiling packages to wrap incorrectly wrap binaries we don't include
# anyways.
libraries = {
name = "bionic-prebuilt";
type = "derivation";
outPath = "${buildAndroidndk}/libexec/${buildAndroidndk.name}/platforms/android-21/arch-${hostInfo.arch}/usr/";
drvPath = throw "fake derivation, build ${buildAndroidndk} to use";
};
}
|