Ubuntu+NDK编译支持HTTPS的libcurl

参考文章：

1.NDK环境配置 http://blog.csdn.net/smfwuxiao/article/details/6587709
2.libcurl的配置修改 http://piggyq.com/pen/compile-libcurl-and-openssl-on-android-using-ndk.html
假设已经编译好了openssl,并且安装目录（头文件和库的所在的目录）为openssl-android

第一步：配置NDK环境（包括系统环境SYSROOT和编译器CC）

android ndk 提供脚本，允许自己定制一套工具链。例如：

$NDK/build/tools/make-standalone-toolchain.sh
--platform=android-5 --install-dir=/tmp/my-android-toolchain [ --arch=x86 ]

将会在/tmp/my-android-toolchain 中创建 sysroot 环境和 工具链。--arch 选项选择目标程序的指令架构，默认是为
arm。

如果不加 --install-dir 选项，则会创建 /tmp/ndk/<toolchain-name>.tar.bz2。

(执行 make-standalone-toolchain.sh --help 查看帮助。)

运行之后，这样使用：

$ export PATH=/tmp/my-android-toolchain/bin:$PATH

$ export CC=arm-linux-androideabi-gcc

$ export CXX=arm-linux-androideabi-g++

$ export CXXFLAGS="-lstdc++"

执行完以上设置环境变量的命令之后，就可以直接编译了（例如，执行
./configure 然后 make 得到的就是 arm 程序了）。

不用再设定 sysroot, CC 了。而且，可以使用 STL，异常，RTTI。

第二步：配置libcurl

进入curl根目录，运行./configure --host=arm-linux-androideabi --with-ssl=/openssl-android

为了保证生成的配置文件正确，需要手动确认一下，打开lib/curl_config.h，

打开宏定义HAVE_LIBSSL、 HAVE_OPENSSL_CRYPTO_H、HAVE_OPENSSL_ERR_H、HAVE_OPENSSL_PEM_H、 HAVE_OPENSSL_PKCS12_H、

HAVE_OPENSSL_RSA_H、HAVE_OPENSSL_SSL_H、 HAVE_OPENSSL_X509_H、USE_OPENSSL、USE_SSLEAY

（但是注意android没有编译openssl中的 engine，因此不要打开宏定义HAVE_OPENSSL_ENGINE_H），

同时注释掉宏定义HAVE_MALLOC_H和HAVE_IOCTL， 这两个宏定义在Android_config.h中有定义，

不注释的话在编译过程中会有很多警告（但是能正确编译通过）

第三步：编译Libcurl

修改Android.mk，删除我们不需要的curl模块，在LOCAL_C_INCLUDES变量的值中增加openssl-android/include和openssl-android/crypto.

再按照以下几种方式修改Android.mk.修改完后，将所在目录package/Android改为package/jni，使用终端进入package，然后执行ndk-build即可。

1.编译ARM版的（依赖openssl的共享库）

先在libcurl前增加动态库模块，使libssl.so等拷贝到正确位置，如下。

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

#using libssl.so

include $(CLEAR_VARS)

LOCAL_MODULE := libssl

LOCAL_SRC_FILES := /home/administrator/openssl-android/libs/armeabi/libssl.so

include $(PREBUILT_SHARED_LIBRARY)

#using libcrypto.so

include $(CLEAR_VARS)

LOCAL_MODULE := libcrypto

LOCAL_SRC_FILES :=/home/administrator/openssl-android/libs/armeabi/libcrypto.so

include $(PREBUILT_SHARED_LIBRARY)

# 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_PATH)/lib/\

$(LOCAL_PATH)/../openssl-android/include/\

$(LOCAL_PATH)/../openssl-android/crypto/

LOCAL_SYSTEM_SHARED_LIBRARIES+= libssl libcrypto libz

LOCAL_CFLAGS += $(common_CFLAGS)

LOCAL_COPY_HEADERS_TO := libcurl/curl

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

LOCAL_MODULE:= libcurl

LOCAL_MODULE_TAGS := optional

ALL_PREBUILT += $(LOCAL_PATH)/NOTICE

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

$(copy-file-to-target)

include $(BUILD_STATIC_LIBRARY)

2.编译ARM版的（依赖Openssl的静态库）

Android.mk修改与3类似，稍微改一下静态库路径即可

3.编译x86版的（依赖openssl静态库）

修改Android.mk

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

include $(CLEAR_VARS)

LOCAL_MODULE := libssl

LOCAL_SRC_FILES := /home/administrator/openssl-android/obj/local/x86/libssl.a

include $(PREBUILT_STATIC_LIBRARY)

include $(CLEAR_VARS)

LOCAL_MODULE := libcrypto

LOCAL_SRC_FILES :=/home/administrator/openssl-android/obj/local/x86/libcrypto.a

include $(PREBUILT_STATIC_LIBRARY)

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

# 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_PATH)/lib/\

$(LOCAL_PATH)/../openssl-android/include/\

$(LOCAL_PATH)/../openssl-android/crypto/

LOCAL_STATIC_LIBRARIES += libssl libcrypto

LOCAL_SYSTEM_SHARED_LIBRARIES += libz

LOCAL_CFLAGS += $(common_CFLAGS)

LOCAL_COPY_HEADERS_TO := libcurl/curl

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

LOCAL_MODULE:= libcurl

LOCAL_MODULE_TAGS := optional

ALL_PREBUILT += $(LOCAL_PATH)/NOTICE

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

$(copy-file-to-target)

include $(BUILD_STATIC_LIBRARY)

在Android.mk的同目录中增加Application.mk,并增加以下内容：

APP_ABI := x86

TARGET_ARCH := x86

------------------------------------------------------------------------------------------------------------------------------------------------

export LDFLAGS="\-L/usr/local/Cellar/android-ndk/r8e/platforms/android-14/arch-arm/usr/lib"

export CPPFLAGS="\-I/usr/local/Cellar/android-ndk/r8e/platforms/android-14/arch-arm/usr/include"

./configure
--host=arm-linux-androideabi \--disable-ftp \--disable-gopher \--disable-file \--disable-imap \--disable-ldap \--disable-ldaps \--disable-pop3 \--disable-proxy \--disable-rtsp \--disable-smtp \--disable-telnet \--disable-tftp \--without-gnutls \--without-libidn
\--without-librtmp \--without-ssl \--disable-dict

make

生成的静态库文件位于：lib/.libs/libcurl.a 动态库：libcurl.so.5.3.0

一般我们使用静态库文件。
复制 libcurl.a 到项目 jni/ 目录，修改 Android.mk 文件

#
A simple test for the minimal standard C++ library

#LOCAL_PATH
:= $(call my-dir)

include
$(CLEAR_VARS)LOCAL_MODULE := curl

LOCAL_SRC_FILES
:= libcurl.a

include
$(PREBUILT_STATIC_LIBRARY)

include
$(CLEAR_VARS)

LOCAL_CFLAGS
= -Wno-psabi

LOCAL_MODULE
:= curltest

LOCAL_SRC_FILES
:= curltest.c

LOCAL_STATIC_LIBRARIES
:= libcurl

LOCAL_C_INCLUDES
+= $(LOCAL_PATH)/include

LOCAL_LDLIBS
+= -lz

---------------------------------------------------------------------------------------------------------------------------------------------
https://zhigang.net/2013/08/yi-zhi-libcurldao-android-ndk.html http://piggyq.com/pen/compile-libcurl-and-openssl-on-android-using-ndk.html http://www.bubuko.com/infodetail-557861.html
---------------------------------------------------------------------------------------------------------------------------------------------

libcurl使用
http://blog.csdn.net/JGood/article/details/4787670 http://www.cnblogs.com/moodlxs/archive/2012/10/15/2724318.html