ubuntu移植libcurl到Android平台

简书排版
http://www.jianshu.com/p/332011ebd6e5

最近移植了很多C++平台的库，很多都是后台开发的库，因为NDK开发，以后很可能会使用，提前预研一下。
libcurl这个库很有名，用的人比较多，下载源码，直接就可以编译使用，以前在Windows平台下开发网络模块的时候，用到过这个库，很强大
最近在跟后台的人聊天过程中了解了很多C++开发的相关库，这是其中一个，Android中网络操作的库有很多种，从基本的Httpurlconnection到httpclient，volley，okhttp等等，很多选择，使用起来也非常方便，当然了，如果在jni层下使用网络库，libcurl是个很不错的选择，所以笔者决定记录一下移植的过程，之前有移植的经验，这个也比较简单。

新建脚本build_curl.sh

#!/usr/bin/env bash# ====================================================================# Sets the cross compile environment for Android# Based upon OpenSSL's setenv-android.sh (by TH, JW, and SM).## Crypto++ Library is copyrighted as a compilation and (as of version 5.6.2)# licensed under the Boost Software License 1.0, while the individual files# in the compilation are all public domain.## See http://www.cryptopp.com/wiki/Android_(Command_Line) for more details# ====================================================================unset IS_CROSS_COMPILEunset IS_IOSunset IS_ANDROIDunset IS_ARM_EMBEDDEDunset AOSP_FLAGSunset AOSP_SYSROOTunset AOSP_STL_INCunset AOSP_STL_LIBunset AOSP_BITS_INC# Set AOSP_TOOLCHAIN_SUFFIX to your preference of tools and STL library.#   Note: 4.9 is required for the latest architectures, like ARM64/AARCH64.# AOSP_TOOLCHAIN_SUFFIX=4.8# AOSP_TOOLCHAIN_SUFFIX=4.9if [ -z "$AOSP_TOOLCHAIN_SUFFIX" ]; then    AOSP_TOOLCHAIN_SUFFIX=4.9fi# Set AOSP_API to the API you want to use. 'armeabi' and 'armeabi-v7a' need#   API 3 (or above), 'mips' and 'x86' need API 9 (or above), etc.# AOSP_API="android-3"     # Android 1.5 and above# AOSP_API="android-4"     # Android 1.6 and above# AOSP_API="android-5"     # Android 2.0 and above# AOSP_API="android-8"     # Android 2.2 and above# AOSP_API="android-9"     # Android 2.3 and above# AOSP_API="android-14"    # Android 4.0 and above# AOSP_API="android-18"    # Android 4.3 and above# AOSP_API="android-19"    # Android 4.4 and above# AOSP_API="android-21"    # Android 5.0 and above# AOSP_API="android-23"    # Android 6.0 and aboveif [ -z "$AOSP_API" ]; then    AOSP_API="android-21"fi###################################################################### ANDROID_NDK_ROOT should always be set by the user (even when not running this script)#   http://groups.google.com/group/android-ndk/browse_thread/thread/a998e139aca71d77.# If the user did not specify the NDK location, try and pick it up. We expect something#   like ANDROID_NDK_ROOT=/opt/android-ndk-r10e or ANDROID_NDK_ROOT=/usr/local/android-ndk-r10e.export ANDROID_NDK_ROOT=/workspace/android-ndk-r10eif [ -z "$ANDROID_NDK_ROOT" ]; then    ANDROID_NDK_ROOT=$(find /opt -maxdepth 1 -type d -name android-ndk-r10* 2>/dev/null | tail -1)    if [ -z "$ANDROID_NDK_ROOT" ]; then        ANDROID_NDK_ROOT=$(find /usr/local -maxdepth 1 -type d -name android-ndk-r10* 2>/dev/null | tail -1)    fi    if [ -z "$ANDROID_NDK_ROOT" ]; then        ANDROID_NDK_ROOT=$(find $HOME -maxdepth 1 -type d -name android-ndk-r10* 2>/dev/null | tail -1)    fifi# Error checkingif [ ! -d "$ANDROID_NDK_ROOT/toolchains" ]; then    echo "ERROR: ANDROID_NDK_ROOT is not a valid path. Please set it."    [ "$0" = "$BASH_SOURCE" ] && exit 1 || return 1fi#####################################################################if [ "$#" -lt 1 ]; then    THE_ARCH=armv7else    THE_ARCH=$(tr [A-Z] [a-z] <<< "$1")fi# https://developer.android.com/ndk/guides/abis.htmlcase "$THE_ARCH" in  arm|armv5|armv6|armv7|armeabi)    TOOLCHAIN_BASE="arm-linux-androideabi"    TOOLNAME_BASE="arm-linux-androideabi"    AOSP_ABI="armeabi"    AOSP_ARCH="arch-arm"    AOSP_FLAGS="-march=armv5te -mtune=xscale -mthumb -msoft-float -funwind-tables -fexceptions -frtti"    ;;  armv7a|armeabi-v7a)    TOOLCHAIN_BASE="arm-linux-androideabi"    TOOLNAME_BASE="arm-linux-androideabi"    AOSP_ABI="armeabi-v7a"    AOSP_ARCH="arch-arm"    AOSP_FLAGS="-march=armv7-a -mthumb -mfpu=vfpv3-d16 -mfloat-abi=softfp -Wl,--fix-cortex-a8 -funwind-tables -fexceptions -frtti"    ;;  hard|armv7a-hard|armeabi-v7a-hard)    TOOLCHAIN_BASE="arm-linux-androideabi"    TOOLNAME_BASE="arm-linux-androideabi"    AOSP_ABI="armeabi-v7a"    AOSP_ARCH="arch-arm"    AOSP_FLAGS="-mhard-float -D_NDK_MATH_NO_SOFTFP=1 -march=armv7-a -mfpu=vfpv3-d16 -mfloat-abi=softfp -Wl,--fix-cortex-a8 -funwind-tables -fexceptions -frtti -Wl,--no-warn-mismatch -Wl,-lm_hard"    ;;  neon|armv7a-neon)    TOOLCHAIN_BASE="arm-linux-androideabi"    TOOLNAME_BASE="arm-linux-androideabi"    AOSP_ABI="armeabi-v7a"    AOSP_ARCH="arch-arm"    AOSP_FLAGS="-march=armv7-a -mfpu=vfpv3-d16 -mfloat-abi=softfp -Wl,--fix-cortex-a8 -funwind-tables -fexceptions -frtti"    ;;  armv8|armv8a|aarch64|arm64|arm64-v8a)    TOOLCHAIN_BASE="aarch64-linux-android"    TOOLNAME_BASE="aarch64-linux-android"    AOSP_ABI="arm64-v8a"    AOSP_ARCH="arch-arm64"    AOSP_FLAGS="-funwind-tables -fexceptions -frtti"    ;;  mips|mipsel)    TOOLCHAIN_BASE="mipsel-linux-android"    TOOLNAME_BASE="mipsel-linux-android"    AOSP_ABI="mips"    AOSP_ARCH="arch-mips"    AOSP_FLAGS="-funwind-tables -fexceptions -frtti"    ;;  mips64|mipsel64|mips64el)    TOOLCHAIN_BASE="mips64el-linux-android"    TOOLNAME_BASE="mips64el-linux-android"    AOSP_ABI="mips64"    AOSP_ARCH="arch-mips64"    AOSP_FLAGS="-funwind-tables -fexceptions -frtti"    ;;  x86)    TOOLCHAIN_BASE="x86"    TOOLNAME_BASE="i686-linux-android"    AOSP_ABI="x86"    AOSP_ARCH="arch-x86"    AOSP_FLAGS="-march=i686 -mtune=intel -mssse3 -mfpmath=sse -funwind-tables -fexceptions -frtti"    ;;  x86_64|x64)    TOOLCHAIN_BASE="x86_64"    TOOLNAME_BASE="x86_64-linux-android"    AOSP_ABI="x86_64"    AOSP_ARCH="arch-x86_64"    AOSP_FLAGS="-march=x86-64 -msse4.2 -mpopcnt -mtune=intel -funwind-tables -fexceptions -frtti"    ;;  *)    echo "ERROR: Unknown architecture $1"    [ "$0" = "$BASH_SOURCE" ] && exit 1 || return 1    ;;esac# Based on ANDROID_NDK_ROOT, try and pick up the path for the tools. We expect something# like /opt/android-ndk-r10e/toolchains/arm-linux-androideabi-4.7/prebuilt/linux-x86_64/bin# Once we locate the tools, we add it to the PATH.AOSP_TOOLCHAIN_PATH=""for host in "linux-x86_64" "darwin-x86_64" "linux-x86" "darwin-x86"do    if [ -d "$ANDROID_NDK_ROOT/toolchains/$TOOLCHAIN_BASE-$AOSP_TOOLCHAIN_SUFFIX/prebuilt/$host/bin" ]; then        AOSP_TOOLCHAIN_PATH="$ANDROID_NDK_ROOT/toolchains/$TOOLCHAIN_BASE-$AOSP_TOOLCHAIN_SUFFIX/prebuilt/$host/bin"        break    fidone###################################################################### Error checkingif [ ! -d "$ANDROID_NDK_ROOT/platforms/$AOSP_API" ]; then    echo "ERROR: AOSP_API is not valid. Does the NDK support the API? Please edit this script."    [ "$0" = "$BASH_SOURCE" ] && exit 1 || return 1elif [ ! -d "$ANDROID_NDK_ROOT/platforms/$AOSP_API/$AOSP_ARCH" ]; then    echo "ERROR: AOSP_ARCH is not valid. Does the NDK support the architecture? Please edit this script."    [ "$0" = "$BASH_SOURCE" ] && exit 1 || return 1fi# Android SYSROOT. It will be used on the command line with --sysroot#   http://android.googlesource.com/platform/ndk/+/ics-mr0/docs/STANDALONE-TOOLCHAIN.htmlexport AOSP_SYSROOT="$ANDROID_NDK_ROOT/platforms/$AOSP_API/$AOSP_ARCH"# TODO: export for the previous GNUmakefile-cross. These can go away eventually.export ANDROID_SYSROOT=$AOSP_SYSROOT#####################################################################export CPP="$AOSP_TOOLCHAIN_PATH/$TOOLNAME_BASE-cpp --sysroot=$AOSP_SYSROOT"export CC="$AOSP_TOOLCHAIN_PATH/$TOOLNAME_BASE-gcc --sysroot=$AOSP_SYSROOT"export CXX="$AOSP_TOOLCHAIN_PATH/$TOOLNAME_BASE-g++ --sysroot=$AOSP_SYSROOT"export CFLAGS="-pie -fPIE"export LDFLAGS="-pie -fPIE"#####################################################################export PREFIX=/usr/local/curl/$AOSP_ABIexport CC="$AOSP_TOOLCHAIN_PATH/$TOOLNAME_BASE-gcc --sysroot=$AOSP_SYSROOT"VERBOSE=1if [ ! -z "$VERBOSE" ] && [ "$VERBOSE" != "0" ]; then  echo "ANDROID_NDK_ROOT: $ANDROID_NDK_ROOT"  echo "AOSP_TOOLCHAIN_PATH: $AOSP_TOOLCHAIN_PATH"  echo "AOSP_ABI: $AOSP_ABI"    echo "AOSP_API: $AOSP_API"  echo "CC: $CC"  echo "AOSP_SYSROOT: $AOSP_SYSROOT"fi./configure \    --prefix=$PREFIX \    --enable-static \    --enable-shared \    --host=$TOOLNAME_BASE[ "$0" = "$BASH_SOURCE" ] && exit 0 || return 0

build_all.sh

#!/bin/bashfor arch in armeabi armeabi-v7a armeabi-v7a-hard arm64-v8a mips mips64 x86 x86_64do    bash build_curl.sh $arch    make    sudo make installdone

目录结构

|—curl源码目录  |—build_curl.sh  |—build_all.sh  |—...

执行脚本

sh build_all.sh

编译成功之后
在/usr/local/curl目录里

测试一下

新建JNI目录，将刚才生成的armeabi目录里的include文件夹和lib文件夹复制进去
新建Android.mk文件

LOCAL_PATH := $(call my-dir)#libcurl库include $(CLEAR_VARS)LOCAL_MODULE := libcurlLOCAL_SRC_FILES := lib/libcurl.a include $(PREBUILT_STATIC_LIBRARY) #测试程序include $(CLEAR_VARS)LOCAL_MODULE := mainLOCAL_SRC_FILES := main.cppLOCAL_C_INCLUDES += $(LOCAL_PATH)/includeLOCAL_LDLIBS := -llog -lzLOCAL_STATIC_LIBRARIES := libcurlLOCAL_CFLAGS += -pie -fPIELOCAL_LDFLAGS += -pie -fPIEinclude $(BUILD_EXECUTABLE)

新建Application.mk添加对C++的支持

APP_ABI := armeabiAPP_PLATFORM := 12APP_CPPFLAGS += -fexceptions -frttiAPP_STL := stlport_static

新建源文件

#include <curl/curl.h>#include <iostream>using namespace std;int main(int argc,char * argv[]){    //定义CURL类型的指针    CURL * curl;    //定义CURLcode类型的变量，保存返回状态码    CURLcode res;    //初始化一个CURL类型的指针    curl = curl_easy_init();    if(curl!=NULL)    {        curl_easy_setopt(curl, CURLOPT_URL, argv[1]);                //curl_easy_setopt(curl, CURLOPT_WRITEDATA, recv);        res = curl_easy_perform(curl);        if(res != CURLE_OK){             cout << curl_easy_strerror(res) << endl;    }        //清除curl操作.        curl_easy_cleanup(curl);    }    return 0;}

目录结构

编译生成

ndk-build

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