This is Google's standard NDK, which only supports running on android devices with aarch64 architecture
the source code from AOSP llvm-toolchain master branch, because llvm is cross-platform, so we can recompile it to Android
At first, we don‘t need to rebuild the whole NDK, since google already built most of it. we only need to build llvm toolchain, then replace the llvm in the NDK. of course you can build the whole NDK, use checkbuild.py, but the source code is too huge.
For more details information, please refer to toolchain readme docs
Termux needs to install aarch64 version of Linux, I recommend using TermuxArch ArchLinux only downloads source code, we are not using it to compile
In order to save storage , there are some pre-compiled tools that do not need to be downloaded. comment out them in the llvm-toolchain/.repo/manifests/default.xml file, click here for example.
# I assume that you have installed the ArchLinux
# install repo
pacman -S repo
cd /data/data/com.termux/files/home
mkdir llvm-toolchain && cd llvm-toolchain
# download the source code
repo init -u https://android.googlesource.com/platform/manifest -b llvm-toolchain
# for china
repo init -u https://aosp.tuna.tsinghua.edu.cn/platform/manifest -b llvm-toolchain
repo sync -c -j4
# sync finish, exit ArchLinux
exit
Termux needs to install some build-essential packages, then copy or soft link it to llvm-toolchain/prebuilts
# remove clang-bootstrap
rm -vrf llvm-toolchain/prebuilts/clang/host/linux-x86/clang-bootstrap
# extract android-ndk-r22b.tar.xz to /path/to/clang-bootstrap
tar -xJvf android-ndk-r22b.tar.xz -C llvm-toolchain/prebuilts/clang/host/linux-x86/clang-bootstrap
# soft link cmake to llvm-toolchain/prebuilts
ln -sf /data/data/com.termux/files/usr/bin/cmake llvm-toolchain/prebuilts/cmake/linux-x86/bin/cmake
# soft link make to llvm-toolchain/prebuilts
ln -sf /data/data/com.termux/files/usr/bin/make llvm-toolchain/prebuilts/build-tools/linux-x86/bin/make
# soft link ninja to llvm-toolchain/prebuilts
ln -sf /data/data/com.termux/files/usr/bin/ninja llvm-toolchain/prebuilts/build-tools/linux-x86/bin/ninja
# remove prebuilt python
rm -vrf llvm-toolchain/prebuilts/python/linux-x86/*
# apt download python3
# extract python_3.9.x_aarch64.deb to llvm-toolchain/prebuilts/python/linux-x86
# building golang
apt install golang
cd llvm-toolchain/prebuilts/go/linux-x86/src
./make.bash
# copy patches/crypt.h to llvm-toolchain/prebuilts/clang/host/linux-x86/clang-bootstrap/sysroot/usr/include
# copy patches/sFile.h to llvm-toolchain/toolchain/llvm-project/lldb/include/lldb/Utility
# vim llvm-toolchain/toolchain/llvm-project/lldb/include/lldb/Utility/ReproducerInstrumentation.h
# add #include "lldb/Utility/sFile.h"
# no build for windows
# If it is not the first time to build, you can add options --skip-source-setup to save time
python toolchain/llvm_android/build.py --enable-assertions --no-build windowsllvm-toolchain stage1 and stage2 compilation will take a long time.
or you can compile it on your computer, the operation process is the same.
there may be some errors during the compilation process, please solve it yourself!
# test the ndk clang
# Note: aarch64-linux-android$API-clang++ is recommended, instead of clang alone
# armv7a-linux-android$API-clang
# i686-linux-android$API-clang
# x86_64-linux-android$API-clang
NDK_TOOLCHAIN=/path/to/android-ndk-r22b/toolchains/llvm/prebuilt/linux-aarch64
$NDK_TOOLCHAIN/bin/aarch64-linux-android30-clang++ test.cpp -o test
# if you want to use clang alone, you need to specify --sysroot=/path/to/sysroot
# for example --sysroot=/data/data/com.termux/files (termux default sysroot)
# if you don't specify a target, the default is --target=aarch64-unknown-linux-android
$NDK_TOOLCHAIN/bin/clang --sysroot=/path/to/sysroot hello.c -o hello
# c++ needs link flags -lc++_shared -static-libstdc++
$NDK_TOOLCHAIN/bin/clang++ --sysroot=/path/to/sysroot -lc++_shared -static-libstdc++ hello.cpp -o hello# simpleperf no need to compile
cd android-ndk-r22b/simpleperf/bin/linux/aarch64
ln -sf ../../android/arm64/simpleperf ./simpleperf
cd /data/data/com.termux/files/home
git clone https://github.com/google/shaderc
cd shaderc/third_party
git clone https://github.com/KhronosGroup/SPIRV-Tools.git spirv-tools
git clone https://github.com/KhronosGroup/SPIRV-Headers.git spirv-tools/external/spirv-headers
git clone https://github.com/google/googletest.git
git clone https://github.com/google/effcee.git
git clone https://github.com/google/re2.git
git clone https://github.com/KhronosGroup/glslang.git
# start building shaderc...
cd ~/shaderc && mkdir build && cd build
# setting android ndk toolchain
TOOLCHAIN=/path/to/android-ndk-r22b/toolchains/llvm/prebuilt/linux-aarch64
cmake -G "Unix Makefiles" \
-DCMAKE_C_COMPILER=$TOOLCHAIN/bin/aarch64-linux-android30-clang \
-DCMAKE_CXX_COMPILER=$TOOLCHAIN/bin/aarch64-linux-android30-clang++ \
-DCMAKE_SYSROOT=$TOOLCHAIN/sysroot \
-DCMAKE_BUILD_TYPE=Release \
-DCMAKE_INSTALL_PREFIX=/path/to/shader-tools \
..
make -j16# llvm-rs-cc and bcc_compat
# slang source code
# git clone https://android.googlesource.com/platform/frameworks/compile/slang
# libbcc source code
# git clone https://android.googlesource.com/platform/frameworks/compile/libbcc
# rs souce code
# git clone https://android.googlesource.com/platform/frameworks/rs
# llvm and clang source code
# git clone https://android.googlesource.com/platform/external/llvm
# git clone https://android.googlesource.com/platform/external/clang
cd termux-ndk/renderscript
./build.sh
building android app with termux-ndk, please refer to build-app
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each NDK version has a lot of changes, direct compilation will fail, the build script are not generic, so please solve the error yourself.
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llvm-rs-cc may have bugs, I rewrote the rs_cc_options.cpp file.
-
because RSCCOptions.inc compilation error, I can't solve it yet.
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RSCCOptions.inc is generated by llvm-tblgen, but which has errors
-
llvm-tblgen -I=../llvm/include RSCCOptions.tb -o RSCCOptions.inc
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if anyone konws, please submit to issue
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