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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";
};
"armv5tel-unknown-linux-androideabi" = {
arch = "arm";
triple = "arm-linux-androideabi";
gccVer = "4.8";
};
"armv7a-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}-$prog_suffix
done
'';
binutils = wrapBintoolsWith {
bintools = binaries;
libc = targetAndroidndkPkgs.libraries;
};
gcc = wrapCCWith {
cc = binaries;
bintools = binutils;
libc = targetAndroidndkPkgs.libraries;
extraBuildCommands = lib.optionalString targetPlatform.isAarch32 (let
p = targetPlatform.platform.gcc or {};
float = p.float or (targetPlatform.parsed.abi.float or null);
flags = lib.concatLists [
(lib.optional (p ? arch) "-march=${p.arch}")
(lib.optional (p ? cpu) "-mcpu=${p.cpu}")
(lib.optional (p ? abi) "-mabi=${p.abi}")
(lib.optional (p ? fpu) "-mfpu=${p.fpu}")
(lib.optional (float != null) "-mfloat=${float}")
(lib.optional (p ? float-abi) "-mfloat-abi=${p.float-abi}")
(lib.optional (p ? mode) "-mmode=${p.mode}")
];
in ''
sed -E -i \
$out/bin/${targetPlatform.config}-cc \
$out/bin/${targetPlatform.config}-c++ \
$out/bin/${targetPlatform.config}-gcc \
$out/bin/${targetPlatform.config}-g++ \
-e '130i extraBefore+=(-Wl,--fix-cortex-a8)' \
-e 's|^(extraBefore=)\(\)$|\1(${builtins.toString flags})|'
'')
# 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/${buildAndroidndk.name}/platforms/android-${hostPlatform.sdkVer}/arch-${hostInfo.arch}/usr/";
drvPath = throw "fake derivation, build ${buildAndroidndk} to use";
};
}
|