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