一．移植Curl工具到Android环境步骤
1.修改cURL源码下的mk文件。源码下面的Android.mk文件最后生成的是静态库libcurl.a，做如下修改(编译成动态库)。
LOCAL_PRELINK_MODULE := false

LOCAL_MODULE:= libcurl

LOCAL_MODULE_TAGS := optional

Copy the licence to a place where Android will find it.

Actually, this doesn't quite work because the build system searches

for NOTICE files before it gets to this point, so it will only be seen

on subsequent builds.

ALL_PREBUILT += $(LOCAL_PATH)/NOTICE

$(LOCAL_PATH)/NOTICE: $(LOCAL_PATH)/COPYING | $(ACP)

$(copy-file-to-target)

include $(BUILD_STATIC_LIBRARY)

include $(BUILD_SHARED_LIBRARY)

2.配置编译环境（cd 到Android.mk同一目录，直接在控制台输入下列代码或者把下面代码弄成sh脚本执行）红色部分根据自己源码情况
ANDROID_HOME=/home/zhoulc/android/ && \

NDK_HOME=/home/zhoulc/android/ndk && \

PATH="$ANDROID_HOME/prebuilt/linux-x86/toolchain/arm-eabi-4.4.0/bin:$PATH" \

./configure --host=arm-linux CC=arm-eabi-gcc --with-random=/dev/urandom \

CPPFLAGS="-I$NDK_HOME/platforms/android-8/arch-arm/usr/include \

-I $ANDROID_HOME/external/curl/include/ \

-I $ANDROID_HOME/external/curl/3rd/include \

-I $ANDROID_HOME/external/curl \

-I $ANDROID_HOME/out/target/product/generic/obj/STATIC_LIBRARIES/libcurl_intermediates \

-I $ANDROID_HOME/dalvik/libnativehelper/include/nativehelper \

-I $ANDROID_HOME/system/core/include \

-I $ANDROID_HOME/hardware/libhardware/include \

-I $ANDROID_HOME/hardware/libhardware_legacy/include \

-I $ANDROID_HOME/hardware/ril/include \

-I $ANDROID_HOME/dalvik/libnativehelper/include \

-I $ANDROID_HOME/frameworks/base/include \

-I $ANDROID_HOME/frameworks/base/opengl/include \

-I $ANDROID_HOME/frameworks/base/native/include \

-I $ANDROID_HOME/external/skia/include \

-I $ANDROID_HOME/out/target/product/generic/obj/include \

-I $ANDROID_HOME/bionic/libc/arch-arm/include \

-I $ANDROID_HOME/bionic/libc/include \

-I $ANDROID_HOME/bionic/libstdc++/include \

-I $ANDROID_HOME/bionic/libc/kernel/common \

-I $ANDROID_HOME/bionic/libc/kernel/arch-arm \

-I $ANDROID_HOME/bionic/libm/include \

-I $ANDROID_HOME/bionic/libm/include/arch/arm \

-I $ANDROID_HOME/bionic/libthread_db/include \

-include $ANDROID_HOME/system/core/include/arch/linux-arm/AndroidConfig.h \

-I $ANDROID_HOME/system/core/include/arch/linux-arm/ \

-D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -DANDROID -DNDEBUG -DNDEBUG -DHAVE_CONFIG_H" \

CFLAGS="-fno-exceptions -Wno-multichar -msoft-float -fpic -ffunction-sections \

-funwind-tables -fstack-protector -Wa,--noexecstack -Werror=format-security \

-fno-short-enums -march=armv5te -mtune=xscale -Wno-psabi -mthumb-interwork \

-fmessage-length=0 -W -Wall -Wno-unused -Winit-self -Wpointer-arith \

-Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point \

-g -Wstrict-aliasing=2 -finline-functions -fno-inline-functions-called-once \

-fgcse-after-reload -frerun-cse-after-loop -frename-registers -UDEBUG \

-mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 \

-Wpointer-arith -Wwrite-strings -Wunused -Winline -Wnested-externs \

-Wmissing-declarations -Wmissing-prototypes -Wno-long-long -Wfloat-equal \

-Wno-multichar -Wsign-compare -Wno-format-nonliteral -Wendif-labels \

-Wstrict-prototypes -Wdeclaration-after-statement -Wno-system-headers" \

LIBS="-nostdlib -Bdynamic -Wl,-T,$ANDROID_HOME/build/core/armelf.x \

-Wl,-dynamic-linker,/system/bin/linker -Wl,--gc-sections -Wl,-z,nocopyreloc \

-L$ANDROID_HOME/out/target/product/generic/obj/lib -Wl,-z,noexecstack \

-Wl,-rpath-link=$ANDROID_HOME/out/target/product/generic/obj/lib \

-lc -llog -lcutils -lstdc++ \

-Wl,--no-undefined $ANDROID_HOME/prebuilt/linux-x86/toolchain/arm-eabi-4.4.0/lib/gcc/arm-eabi/4.4.0/libgcc.a \

$ANDROID_HOME/out/target/product/generic/obj/lib/crtend_android.o \

-lm $ANDROID_HOME/out/target/product/generic/obj/lib/crtbegin_dynamic.o \

-L$ANDROID_HOME/external/curl/3rd/libs"
3.编译libcurl.so库
cd进入android/external/curl源码目录

mm-》编译生成libcurl.so库

4.编写测试case 以及Android.mk文件并生成可执行文件
新建一个测试案例curl_test.cpp

include "curl/curl.h"

include ;

int main() {

CURL *curl; 

CURLcode res;

curl_global_init(CURL_GLOBAL_ALL);

curl = curl_easy_init();

if (curl) {     

    curl_easy_setopt(curl, CURLOPT_URL, "http://www.baidu.com/"); 

    res = curl_easy_perform(curl); 

    if (0!=res) {      

        printf("curl error: %d\n", res);         

    }        

    curl_easy_cleanup(curl);     

}   

curl_global_cleanup();

return 0;

}
在同一目录下写一个Android.mk文件生成curl_test可执行文件

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_C_INCLUDES += \

$(TOP)/external/curl/include/ \

LOCAL_SRC_FILES:= curl_test.cpp

No shared libraries.

No static libraries.

LOCAL_SHARED_LIBRARIES := libcurl

LOCAL_MODULE_TAGS := optional

LOCAL_MODULE := curl_test

include $(BUILD_EXECUTABLE)

生成可执行文件：curl_test

4.运行查看测试结果
运行测试case：curl_test

5.(补充)移植libcurl到android4.0，修改两个地方
1）把生成的路径改一下，一般默认为out/target/product/generic下面，我们根据系统不同(根据lunch选择不同，最终生成的路径不一样)改为系统的全局变量，

把$ANDROID_HOME/out/target/product/generic替换成$ANDROID_PRODUCT_OUT。

ANDROID_HOME_CURL=../../ && \

NDK_HOME_CURL=../../prebuilt/ndk && \

PATH="$ANDROID_HOME_CURL/prebuilt/linux-x86/toolchain/arm-eabi-4.4.0/bin:$PATH" \

./configure --host=arm-linux CC=gcc --with-random=/dev/urandom \

CPPFLAGS="-I$NDK_HOME_CURL/platforms/android-8/arch-arm/usr/include \

-I $ANDROID_HOME_CURL/external/curl/include/ \

-I $ANDROID_HOME_CURL/external/curl/3rd/include \

-I $ANDROID_HOME_CURL/external/curl \

-I $ANDROID_HOME_CURL/out/target/product/generic/obj/STATIC_LIBRARIES/libcurl_intermediates \

-I $ANDROID_HOME_CURL/dalvik/libnativehelper/include/nativehelper \

-I $ANDROID_HOME_CURL/system/core/include \

-I $ANDROID_HOME_CURL/hardware/libhardware/include \

-I $ANDROID_HOME_CURL/hardware/libhardware_legacy/include \

-I $ANDROID_HOME_CURL/hardware/ril/include \

-I $ANDROID_HOME_CURL/dalvik/libnativehelper/include \

-I $ANDROID_HOME_CURL/frameworks/base/include \

-I $ANDROID_HOME_CURL/frameworks/base/opengl/include \

-I $ANDROID_HOME_CURL/frameworks/base/native/include \

-I $ANDROID_HOME_CURL/external/skia/include \

-I $ANDROID_HOME_CURL/out/target/product/generic/obj/include \

-I $ANDROID_HOME_CURL/bionic/libc/arch-arm/include \

-I $ANDROID_HOME_CURL/bionic/libc/include \

-I $ANDROID_HOME_CURL/bionic/libstdc++/include \

-I $ANDROID_HOME_CURL/bionic/libc/kernel/common \

-I $ANDROID_HOME_CURL/bionic/libc/kernel/arch-arm \

-I $ANDROID_HOME_CURL/bionic/libm/include \

-I $ANDROID_HOME_CURL/bionic/libm/include/arch/arm \

-I $ANDROID_HOME_CURL/bionic/libthread_db/include \

-include $ANDROID_HOME_CURL/system/core/include/arch/linux-arm/AndroidConfig.h \

-I $ANDROID_HOME_CURL/system/core/include/arch/linux-arm/ \