Update Android and RPi instructions
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Milan Nikolic
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5 changed files with 20 additions and 202 deletions
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@ -2,28 +2,26 @@
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To compile example to shared library you will need [Android NDK](https://developer.android.com/ndk/downloads/index.html).
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To build Android apk you will need [Android SDK](http://developer.android.com/sdk/index.html#Other).
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Download and unpack archives somewhere.
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Go must be cross compiled for android. There is a bootstrap.sh script that you can use to compile Go for android/arm and android/arm64.
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Export path to Android NDK, point to location where you have unpacked archive:
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export ANDROID_NDK_HOME=/opt/android-ndk
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Compile Go and android_native_app_glue, /usr/local is prefix where Go and Android toolchains will be installed:
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Add toolchain bin directory to PATH:
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./bootstrap.sh /usr/local
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export PATH=${ANDROID_NDK_HOME}/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin:${PATH}
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After build is complete point GOROOT to new Go installation in /usr/local, and add toolchain bin directory to PATH:
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export GOROOT=/usr/local/go
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export PATH=/usr/local/android-arm7/bin:${PATH}
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Export sysroot path:
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export ANDROID_SYSROOT=${ANDROID_NDK_HOME}/platforms/android-16/arch-arm
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And compile shared library:
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CGO_CFLAGS="-I/usr/local/android-arm7/include" CGO_LDFLAGS="-L/usr/local/android-arm7/lib" \
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CC=arm-linux-androideabi-gcc CGO_ENABLED=1 GOOS=android GOARCH=arm \
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${GOROOT}/bin/go build -v -x -buildmode=c-shared -ldflags="-s -w -extldflags=-Wl,-soname,libexample.so" \
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CC=arm-linux-androideabi-gcc \
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CGO_CFLAGS="-I${ANDROID_SYSROOT}/usr/include --sysroot=${ANDROID_SYSROOT}" \
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CGO_LDFLAGS="-L${ANDROID_SYSROOT}/usr/lib --sysroot=${ANDROID_SYSROOT}" \
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CGO_ENABLED=1 GOOS=android GOARCH=arm \
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go build -buildmode=c-shared -ldflags="-s -w -extldflags=-Wl,-soname,libexample.so" \
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-o=android/libs/armeabi-v7a/libexample.so
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To build apk export path to Android SDK, point to location where you unpacked archive:
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@ -1,137 +0,0 @@
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#!/bin/bash
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##### Bootstrap Go android/arm and android/arm64 with Android standalone toolchains.
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if [[ -z "$1" ]]; then
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echo "Usage: bootstrap.sh <install prefix>"
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exit 1
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fi
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if [[ "$OSTYPE" == "msys" || "$OSTYPE" == "cygwin" ]]; then
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OS="windows"
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elif [[ "$OSTYPE" == "darwin"* ]]; then
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OS="darwin"
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elif [[ "$OSTYPE" == "linux-gnu" ]]; then
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OS="linux"
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fi
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MYCC=clang
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MYCXX=clang++
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###################################################
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echo "##### Check requirements"
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for x in "python" "tar" "unzip" "curl" "cmake" "grep" "sed" "awk"; do
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which ${x} || MISSING=true
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done
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if [[ "$MISSING" = true ]]; then
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exit 1
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fi
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API_VERSION_ARM=15
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API_VERSION_ARM64=21
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BUILD_TOOLS_VERSION=26.0.2
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if [[ -z "$GO_VERSION" ]]; then
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# go1.9.2
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GO_VERSION=`curl -s https://golang.org/dl/ | grep 'id="go' | head -n1 | awk -F'"' '{print $4}'`
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fi
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if [[ -z "$NDK_VERSION" ]]; then
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# r15c
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NDK_VERSION=`curl -s https://developer.android.com/ndk/downloads/index.html | grep 'id="stable-downloads"' | awk -F'(' '{print $2}' | awk -F')' '{print $1}'`
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fi
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if [[ -z "$TOOLS_VERSION" ]]; then
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# 3859397
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TOOLS_VERSION=`curl -s https://developer.android.com/studio/index.html | grep sdk-tools-linux | grep -o '[0-9]*' | head -n1`
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fi
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INSTALL_PREFIX="$1"
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export PATH=${INSTALL_PREFIX}/android-arm/bin:${INSTALL_PREFIX}/android-arm64/bin:${PATH}
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BUILD_DIR=`mktemp -d`
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mkdir -p ${BUILD_DIR}/bootstrap || exit 1
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function finish {
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echo; echo "##### Remove build directory"
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rm -rf ${BUILD_DIR}
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}
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trap finish EXIT
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###################################################
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if [[ -z "$ANDROID_NDK_HOME" ]]; then
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echo; echo "##### Download NDK ${NDK_VERSION}"
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cd ${BUILD_DIR} && curl -L -O --progress-bar https://dl.google.com/android/repository/android-ndk-${NDK_VERSION}-${OS}-x86_64.zip; tar -xzf android-ndk-${NDK_VERSION}-${OS}-x86_64.zip >/dev/null 2>&1 || unzip -q android-ndk-${NDK_VERSION}-${OS}-x86_64.zip || exit -1
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ANDROID_NDK_HOME=${BUILD_DIR}/android-ndk-${NDK_VERSION}
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fi
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if [[ "$OS" == "windows" && "$OSTYPE" == "msys" ]]; then
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# Fix for python in MSYS2 shell
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grep -q 'MSYS' ${ANDROID_NDK_HOME}/build/tools/make_standalone_toolchain.py || sed -i "s/platform\.system() == 'Windows'/platform.system() == 'Windows' or platform.system().startswith('MSYS')/" ${ANDROID_NDK_HOME}/build/tools/make_standalone_toolchain.py
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# Export path to mingw64
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export PATH=/mingw64/bin:${PATH}
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fi
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echo; echo "##### Make standalone Android toolchains"
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${ANDROID_NDK_HOME}/build/tools/make_standalone_toolchain.py --api=${API_VERSION_ARM} --arch=arm --install-dir=${INSTALL_PREFIX}/android-arm -v || exit 1
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${ANDROID_NDK_HOME}/build/tools/make_standalone_toolchain.py --api=${API_VERSION_ARM64} --arch=arm64 --install-dir=${INSTALL_PREFIX}/android-arm64 -v || exit 1
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###################################################
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echo; echo "##### Download Go ${GO_VERSION} binaries"
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if [[ "$OS" == "windows" ]]; then
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cd ${BUILD_DIR}/bootstrap && curl -L -O --progress-bar http://storage.googleapis.com/golang/${GO_VERSION}.${OS}-amd64.zip; tar -xzf ${GO_VERSION}.${OS}-amd64.zip >/dev/null 2>&1 || unzip -q ${GO_VERSION}.${OS}-amd64.zip || exit 1
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else
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cd ${BUILD_DIR}/bootstrap && curl -L --progress-bar http://storage.googleapis.com/golang/${GO_VERSION}.${OS}-amd64.tar.gz | tar -xz || exit 1
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fi
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echo; echo "##### Download Go ${GO_VERSION} source"
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cd ${BUILD_DIR} && curl -L --progress-bar http://storage.googleapis.com/golang/${GO_VERSION}.src.tar.gz | tar -xz && cd ${BUILD_DIR}/go/src || exit 1
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if [[ "$OS" == "windows" && "$OSTYPE" == "msys" ]]; then
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# Fix/Hack for MSYS2 shell
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sed -i '/^eval/c\export $(./cmd/dist/dist env -p | grep -v PATH | xargs)' ${BUILD_DIR}/go/src/make.bash
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# Fix/Hack for MSYS2 shell
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sed -i 's/old_bin_files go gofmt/old_bin_files go.exe gofmt.exe/' ${BUILD_DIR}/go/src/make.bash
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fi
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echo; echo "##### Compile Go ${GO_VERSION} for host"
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GOROOT_BOOTSTRAP=${BUILD_DIR}/bootstrap/go ./make.bash || exit 1
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echo; echo "##### Compile Go ${GO_VERSION} for arm-linux-androideabi"
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GOROOT_BOOTSTRAP=${BUILD_DIR}/bootstrap/go CC_FOR_TARGET=arm-linux-androideabi-${MYCC} GOOS=android GOARCH=arm CGO_ENABLED=1 ./make.bash --no-clean || exit 1
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echo; echo "##### Compile Go ${GO_VERSION} for aarch64-linux-android"
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GOROOT_BOOTSTRAP=${BUILD_DIR}/bootstrap/go CC_FOR_TARGET=aarch64-linux-android-${MYCC} GOOS=android GOARCH=arm64 CGO_ENABLED=1 ./make.bash --no-clean || exit 1
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cp -r -f ${BUILD_DIR}/go ${INSTALL_PREFIX}
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###################################################
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echo; echo "##### Compile android_native_app_glue"
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mkdir -p ${BUILD_DIR}/native_app_glue/jni
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cp -r ${ANDROID_NDK_HOME}/sources/android/native_app_glue/* ${BUILD_DIR}/native_app_glue/jni/
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echo "APP_ABI := armeabi-v7a arm64-v8a" > ${BUILD_DIR}/native_app_glue/jni/Application.mk
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cd ${BUILD_DIR}/native_app_glue && ${ANDROID_NDK_HOME}/ndk-build V=1 || exit 1
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cp ${BUILD_DIR}/native_app_glue/obj/local/armeabi-v7a/libandroid_native_app_glue.a ${INSTALL_PREFIX}/android-arm/lib/
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cp ${BUILD_DIR}/native_app_glue/obj/local/arm64-v8a/libandroid_native_app_glue.a ${INSTALL_PREFIX}/android-arm64/lib/
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cp ${ANDROID_NDK_HOME}/sources/android/native_app_glue/android_native_app_glue.h ${INSTALL_PREFIX}/android-arm/include/
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cp ${ANDROID_NDK_HOME}/sources/android/native_app_glue/android_native_app_glue.h ${INSTALL_PREFIX}/android-arm64/include/
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###################################################
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echo; echo "##### Download sdk tools"
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cd ${BUILD_DIR} && curl -L -O --progress-bar https://dl.google.com/android/repository/sdk-tools-${OS}-${TOOLS_VERSION}.zip; tar -xzf sdk-tools-${OS}-${TOOLS_VERSION}.zip >/dev/null 2>&1 || unzip -q sdk-tools-${OS}-${TOOLS_VERSION}.zip || exit -1
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mkdir -p ${INSTALL_PREFIX}/android-tools
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cp -r -f ${BUILD_DIR}/tools/* ${INSTALL_PREFIX}/android-tools/
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echo; echo "##### Install build tools and platforms"
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yes | ${INSTALL_PREFIX}/android-tools/bin/sdkmanager --licenses
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${INSTALL_PREFIX}/android-tools/bin/sdkmanager "build-tools;${BUILD_TOOLS_VERSION}"
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${INSTALL_PREFIX}/android-tools/bin/sdkmanager "platforms;android-${API_VERSION_ARM}"
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${INSTALL_PREFIX}/android-tools/bin/sdkmanager "platforms;android-${API_VERSION_ARM64}"
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@ -1,20 +1,18 @@
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### Raspberry Pi example
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To compile example for Raspberry Pi you will need RPi toolchain and userspace libraries, and Go must be cross compiled for linux/arm with that toolchain.
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To cross compile example for Raspberry Pi you will need [RPi toolchain](https://github.com/raspberrypi/tools/tree/master/arm-bcm2708) and [userspace libraries](https://github.com/raspberrypi/firmware) (opt/vc).
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There is a bootstrap.sh script that you can use to cross compile Go and OpenAL.
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Export path to RPi toolchain:
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Compile Go and OpenAL, /usr/local is prefix where Go and RPi toolchain and libraries will be installed:
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export RPI_HOME=/opt/tools/arm-bcm2708/arm-linux-gnueabihf
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./bootstrap.sh /usr/local
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Add toolchain bin directory to PATH:
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After build is complete point GOROOT to new Go installation in /usr/local, and add toolchain bin directory to PATH:
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export GOROOT=/usr/local/go
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export PATH=/usr/local/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin:${PATH}
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export PATH=${RPI_HOME}/bin:${PATH}
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And compile example:
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CGO_CFLAGS="-I/usr/local/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/include -I/usr/local/vc/include -I/usr/local/vc/include/interface/vcos -I/usr/local/vc/include/interface/vmcs_host/linux -I/usr/local/vc/include/interface/vcos/pthreads" \
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CGO_LDFLAGS="-L/usr/local/vc/lib -L/usr/local/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/lib -ldl" \
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CC=arm-linux-gnueabihf-gcc CGO_ENABLED=1 GOOS=linux GOARCH=arm GOARM=6 ${GOROOT}/bin/go build -v -x
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CC=arm-linux-gnueabihf-gcc \
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CGO_CFLAGS="-I/opt/vc/include -I/opt/vc/include/interface/vcos -I/opt/vc/include/interface/vmcs_host/linux -I/opt/vc/include/interface/vcos/pthreads --sysroot=${RPI_HOME}/arm-linux-gnueabihf/sysroot" \
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CGO_LDFLAGS="-L/opt/vc/lib -L/opt/vc/lib64 --sysroot=${RPI_HOME}/arm-linux-gnueabihf/sysroot" \
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CGO_ENABLED=1 GOOS=linux GOARCH=arm go build
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@ -1,41 +0,0 @@
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#!/bin/sh
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if [ -z "$1" ]; then
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echo "Usage: bootstrap.sh <install prefix>"
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exit 1
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fi
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GO_OS="linux"
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GO_ARCH="amd64"
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GO_VERSION=`curl -s https://golang.org/dl/ | grep 'id="go' | head -n1 | awk -F'"' '{print $4}'`
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INSTALL_PREFIX="$1"
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export PATH=${INSTALL_PREFIX}/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin:${PATH}
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BUILD_DIR=`mktemp -d`
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mkdir -p ${BUILD_DIR}/bootstrap
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echo "##### Download toolchain"
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cd ${BUILD_DIR} && git clone --depth=1 --branch=master https://github.com/raspberrypi/tools.git
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cp -r -f ${BUILD_DIR}/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64 ${INSTALL_PREFIX}
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echo "##### Download userspace libraries"
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cd ${BUILD_DIR} && git clone --depth=1 --branch=master https://github.com/raspberrypi/firmware.git
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cp -r -f ${BUILD_DIR}/firmware/hardfp/opt/vc ${INSTALL_PREFIX}
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echo "##### Download Go binaries"
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cd ${BUILD_DIR}/bootstrap && curl -s -L http://storage.googleapis.com/golang/${GO_VERSION}.${GO_OS}-${GO_ARCH}.tar.gz | tar xz
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echo "##### Download Go source"
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cd ${BUILD_DIR} && curl -s -L http://storage.googleapis.com/golang/${GO_VERSION}.src.tar.gz | tar xz && cd ${BUILD_DIR}/go/src
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echo "##### Compile Go for host"
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GOROOT_BOOTSTRAP=${BUILD_DIR}/bootstrap/go ./make.bash || exit 1
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echo "##### Compile Go for arm-linux-gnueabihf"
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GOROOT_BOOTSTRAP=${BUILD_DIR}/bootstrap/go CC_FOR_TARGET=arm-linux-gnueabihf-gcc GOOS=linux GOARCH=arm GOARM=6 CGO_ENABLED=1 ./make.bash --no-clean || exit 1
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cp -r -f ${BUILD_DIR}/go ${INSTALL_PREFIX}
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echo "##### Remove build directory"
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rm -rf ${BUILD_DIR}
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