android -- libcurl移植、编译与测试

大家都知道，curl是利用URL语法在命令行方式下工作的文件传输工具

支持很多协议：FTP, FTPS, HTTP, HTTPS, GOPHER, TELNET, DICT, FILE 以及 LDAP。因此将其移植到android平台使用。

目前 http://curl.haxx.se/ 网站上最新的版本：curl and libcurl 7.29.0

网上也有人移植过curl,其实挺简单的，基本的编译脚本都的，我使用的是curl-7.28.1版本，下面简要说明一下如何编译及使用吧。

1、移植Curl工具到Android 2.3 环境步骤

   1、直接到网站上下载 curl 源码

   2、利用tar在android编译环境下，一般放在 external 目录下

   3、由于Curl依赖一些一些头文件及定义需要先执行配置文件先，在external/curl 下面编译curl.sh

      需要 cd external/curl/.curl.sh进行执行，或者放在android根目录下的*.sh脚本中执行：source external/curl/curl.sh

      其中修改了相应的CURL路径及编译工具链路径等变量

#!/bin/bash

ANDROID_HOME_CURL=../../ && \
NDK_HOME_CURL=../../ndk && \
PATH="$ANDROID_HOME_CURL/prebuilt/linux-x86/toolchain/arm-eabi-4.4.0/bin:$PATH" \
./configure --host=arm-linux CC=arm-eabi-gcc --with-random=/dev/urandom \
CPPFLAGS="-I$NDK_HOME_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 $ANDROID_HOME_CURL/system/core/include/arch/linux-arm/ \
-D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -DANDROID -DNDEBUG -DNDEBUG -DHAVE_CONFIG_H" \
CFLAGS="-fno-exceptions -Wno-multichar -msoft-float -fpic -ffunction-sections \
-funwind-tables -fstack-protector -Wa,--noexecstack -Werror=format-security \
-fno-short-enums -march=armv5te -mtune=xscale  -Wno-psabi -mthumb-interwork  \
-fmessage-length=0 -W -Wall -Wno-unused -Winit-self -Wpointer-arith \
-Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point  \
-g -Wstrict-aliasing=2 -finline-functions -fno-inline-functions-called-once \
-fgcse-after-reload -frerun-cse-after-loop -frename-registers  -UDEBUG \
-mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64   \
-Wpointer-arith -Wwrite-strings -Wunused -Winline -Wnested-externs \
-Wmissing-declarations -Wmissing-prototypes -Wno-long-long -Wfloat-equal \
-Wno-multichar -Wsign-compare -Wno-format-nonliteral -Wendif-labels \
-Wstrict-prototypes -Wdeclaration-after-statement -Wno-system-headers"  \
LIBS="-nostdlib -Bdynamic -Wl,-T,$ANDROID_HOME_CURL/build/core/armelf.x \
-Wl,-dynamic-linker,/system/bin/linker -Wl,--gc-sections -Wl,-z,nocopyreloc \
-L$ANDROID_HOME_CURL/out/target/product/generic/obj/lib -Wl,-z,noexecstack \
-Wl,-rpath-link=$ANDROID_HOME_CURL/out/target/product/generic/obj/lib \
-lc -llog -lcutils -lstdc++ \
-Wl,--no-undefined $ANDROID_HOME_CURL/prebuilt/linux-x86/toolchain/arm-eabi-4.4.0/lib/gcc/arm-eabi/4.4.0/libgcc.a  \
$ANDROID_HOME_CURL/out/target/product/generic/obj/lib/crtend_android.o \
-lm $ANDROID_HOME_CURL/out/target/product/generic/obj/lib/crtbegin_dynamic.o \
-L$ANDROID_HOME_CURL/external/curl/3rd/libs"

      

   4、编写android.mk编译脚本

      增加编译生成libcurl.so动态库

      

LOCAL_PATH:= $(call my-dir)


common_CFLAGS := -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 -DHAVE_CONFIG_H

#########################
# Build the libcurl library

include $(CLEAR_VARS)
include $(LOCAL_PATH)/lib/Makefile.inc
CURL_HEADERS := \
	curlbuild.h \
	curl.h \
	curlrules.h \
	curlver.h \
	easy.h \
	mprintf.h \
	multi.h \
	stdcheaders.h \
	typecheck-gcc.h

LOCAL_SRC_FILES := $(addprefix lib/,$(CSOURCES))
LOCAL_C_INCLUDES += $(LOCAL_PATH)/include/
LOCAL_CFLAGS += $(common_CFLAGS)

LOCAL_COPY_HEADERS_TO := libcurl/curl
LOCAL_COPY_HEADERS := $(addprefix include/curl/,$(CURL_HEADERS))
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 $(CLEAR_VARS)
include $(LOCAL_PATH)/lib/Makefile.inc
CURL_HEADERS := \
	curlbuild.h \
	curl.h \
	curlrules.h \
	curlver.h \
	easy.h \
	mprintf.h \
	multi.h \
	stdcheaders.h \
	typecheck-gcc.h

LOCAL_SRC_FILES := $(addprefix lib/,$(CSOURCES))
LOCAL_C_INCLUDES += $(LOCAL_PATH)/include/
LOCAL_CFLAGS += $(common_CFLAGS)

LOCAL_COPY_HEADERS_TO := libcurl/curl
LOCAL_COPY_HEADERS := $(addprefix include/curl/,$(CURL_HEADERS))
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_SHARED_LIBRARY)

#########################
# Build the curl binary

include $(CLEAR_VARS)
include $(LOCAL_PATH)/src/Makefile.inc
LOCAL_SRC_FILES := $(addprefix src/,$(CURL_CFILES))

LOCAL_MODULE := curl
LOCAL_MODULE_TAGS := optional
LOCAL_SHARED_LIBRARIES := libcurl
LOCAL_SYSTEM_SHARED_LIBRARIES := libc

LOCAL_C_INCLUDES += $(LOCAL_PATH)/include $(LOCAL_PATH)/lib

# This may also need to include $(CURLX_ONES) in order to correctly link
# if libcurl is changed to be built as a dynamic library
LOCAL_CFLAGS += $(common_CFLAGS)

include $(BUILD_EXECUTABLE)

编译过程如果没有任何错误的话将会在/system/lib下生成 libcurl.so 及 /system/bin下面 curl 可执行文件

2、测试接口功能

#include "curl/curl.h"

#include <stdio.h>;

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;

}

编译一个相应的android.mk生成可执行文件：

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS) 

LOCAL_C_INCLUDES += \

    $(TOP)/external/curl/include/ \ 

LOCAL_SRC_FILES:= curl_test.cpp

LOCAL_SHARED_LIBRARIES := libcurl

LOCAL_MODULE_TAGS := optional

LOCAL_MODULE := curl_test

include $(BUILD_EXECUTABLE)

即可进行测试的，输出的内容就是打开 http://www.baidu.com/ 页面的源代码

3、编译问题

      请根据具体android版本及路径修改 curl.sh 文件并重新执行即可，暂时没碰到其它的问题。