跨平台交叉编译libcurl库（Android、iOS）

一、Android平台
     1. 进入网址https://curl.haxx.se/download.html，下载libcurl压缩包。
     2. 进入curl-7.58.0目录，在当前目录下创建文件夹openssl，将openssl的头文件以及库分别拷贝openssl /include到和openssl/lib目录下。
     3.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_COMPILE

unset IS_IOS
unset IS_ANDROID
unset IS_ARM_EMBEDDED

unset AOSP_FLAGS
unset AOSP_SYSROOT
unset AOSP_STL_INC
unset AOSP_STL_LIB
unset 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=4.9
if [ -z "$AOSP_TOOLCHAIN_SUFFIX" ]; then
AOSP_TOOLCHAIN_SUFFIX=4.9
fi

# 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 above
if [ -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=/usr/android/android-ndk-r14b

if [ -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)
fi
fi

# Error checking
if [ ! -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 1
fi

#####################################################################

if [ "$#" -lt 1 ]; then
THE_ARCH=armv7a
else
THE_ARCH=$(tr [A-Z] [a-z] <<< "$1")
fi

# https://developer.android.com/ndk/guides/abis.html case "$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
fi
done

#####################################################################

# Error checking
if [ ! -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 1
elif [ ! -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 1
fi

# Android SYSROOT. It will be used on the command line with --sysroot
# http://android.googlesource.com/platform/ndk/+/ics-mr0/docs/STANDALONE-TOOLCHAIN.html export 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=$(pwd)/android-lib
export CC="$AOSP_TOOLCHAIN_PATH/$TOOLNAME_BASE-gcc --sysroot=$AOSP_SYSROOT"

VERBOSE=1
if [ ! -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=$PREFIX \
--enable-static \
--enable-shared \
--host=arm-androideabi-linux \
--with-ssl=$(pwd)/openssl
make
make install
[ "$0" = "$BASH_SOURCE" ] && exit 0 || return 0
     3.新建脚本build_all.sh。
#!/bin/bash

#for arch in armeabi armeabi-v7a armeabi-v7a-hard arm64-v8a mips mips64 x86 x86_64
for arch in armeabi-v7a
do
bash build_curl.sh $arch
make
sudo make install
done
     4.通过chmod +x build_all.sh和chmod +x build_curl.sh命令赋予脚本执行权限。
     5../build_all.sh

一、iOS平台
     1. 进入网址https://curl.haxx.se/download.html，下载libcurl压缩包。
     2. 进入curl-7.58.0目录，在当前目录下创建文件夹openssl，将openssl的头文件以及库分别拷贝openssl /include到和openssl/lib目录下。
     3.新建脚本build_curl.sh。
#!/bin/bash

export DEVROOT=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain
#DFT_DIST_DIR=${HOME}/Desktop/libcurl-ios-dist
DFT_DIST_DIR=$(pwd)/ios-lib
DIST_DIR=${DIST_DIR:-$DFT_DIST_DIR}

function check_curl_ver() {
echo "#include \"include/curl/curlver.h\"
#if LIBCURL_VERSION_MAJOR < 7 || LIBCURL_VERSION_MINOR < 55
#error Required curl 7.40.0+; See http://curl.haxx.se/docs/adv_20150108A.html #error Supported minimal version is 7.55.0 for header file changes, see Issue #12 (https://github.com/sinofool/build-libcurl-ios/issues/12)
#endif"|gcc -c -o /dev/null -xc -||exit 9
}

function build_for_arch() {
ARCH=$1
HOST=$2
SYSROOT=$3
PREFIX=$4
IPHONEOS_DEPLOYMENT_TARGET="6.0"
export PATH="${DEVROOT}/usr/bin/:${PATH}"
export CFLAGS="-DCURL_BUILD_IOS -arch ${ARCH} -pipe -Os -gdwarf-2 -isysroot ${SYSROOT} -miphoneos-version-min=${IPHONEOS_DEPLOYMENT_TARGET} -fembed-bitcode"
export LDFLAGS="-arch ${ARCH} -isysroot ${SYSROOT}"
./configure --disable-shared --without-zlib --enable-static --enable-ipv6 ${SSL_FLAG} --host="${HOST}" --prefix=${PREFIX} && make -j8 && make install
}

if [ "$1" == "openssl" ]
then
# if [ ! -d ${HOME}/Desktop/openssl ]
if [ ! -d $(pwd)/openssl ]
then
echo "Please use https://github.com/sinofool/build-openssl-ios/ to build OpenSSL for iOS first"
exit 8
fi
#export SSL_FLAG=--with-ssl=${HOME}/Desktop/openssl
export SSL_FLAG=--with-ssl=$(pwd)/openssl
else
check_curl_ver
export SSL_FLAG=--with-darwinssl
fi

#TMP_DIR=$(pwd)/build_libcurl_$$

TMP_DIR=$(pwd)/ios-lib

#build_for_arch i386 i386-apple-darwin /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk ${TMP_DIR}/i386 || exit 1
#build_for_arch x86_64 x86_64-apple-darwin /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk ${TMP_DIR}/x86_64 || exit 2
build_for_arch arm64 arm-apple-darwin /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk ${TMP_DIR}/arm64 || exit 3
#build_for_arch armv7s armv7s-apple-darwin /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk ${TMP_DIR}/armv7s || exit 4
#build_for_arch armv7 armv7-apple-darwin /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk ${TMP_DIR}/armv7 || exit 5

mkdir -p ${TMP_DIR}/lib/
${DEVROOT}/usr/bin/lipo \
-arch arm64 ${TMP_DIR}/arm64/lib/libcurl.a \
-output ${TMP_DIR}/lib/libcurl.a -create
# -arch x86_64 ${TMP_DIR}/x86_64/lib/libcurl.a \
# -arch armv7 ${TMP_DIR}/armv7/lib/libcurl.a \
# -arch armv7s ${TMP_DIR}/armv7s/lib/libcurl.a \

cp -r ${TMP_DIR}/arm64/include ${TMP_DIR}/

mkdir -p ${DIST_DIR}
cp -r ${TMP_DIR}/include ${TMP_DIR}/lib ${DIST_DIR}


     4.通过chmod +x build_curl.sh命令赋予脚本执行权限。     5../build_curl.sh