Cygwin+NDK编译curl+openssl源码库(静态)

在NDK安装目录下建立如下目录：D:\NDK\android-ndk-r10\apps\OpenSSL，把从http://download.youkuaiyun.com/detail/lsq19871207/7730949下载的OpenSSL1.0.1cForAndroid.zip解压到上述目录路径下，目录结构如下图所示：

4.2.2编译openssl静态库

openssl默认编译成动态库.so文件，如果想编译成静态库.o文件，需要修改相应的Android.mk文件：

(1)OpenSSL/crypto/Android.mk:

a、把“target” 和“host shared library”的编译选项统统注释掉，只留下“host static library”编译选项，并把include $(BUILD_SHARED_LIBRARY) 修改为 include$(BUILD_STATIC_LIBRARY)

b、另外还需要连接libz，加上下面的一句

LOCAL_LDLIBS += -lz

c、Android.mk文件大致如下:

LOCAL_PATH:=$(call my-dir)
arm_cflags :=-DOPENSSL_BN_ASM_MONT -DAES_ASM -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM
arm_src_files := \
   aes/asm/aes-armv4.S \
   bn/asm/armv4-mont.S \
   sha/asm/sha1-armv4-large.S \
   sha/asm/sha256-armv4.S \
   sha/asm/sha512-armv4.S
non_arm_src_files := aes/aes_core.c
local_src_files := \
    cryptlib.c\
    mem.c\
    mem_clr.c\
    mem_dbg.c\
    ………\
    ………\
………\
local_c_includes := \
    $(NDK_PROJECT_PATH) \
    $(NDK_PROJECT_PATH)/crypto/asn1 \
    $(NDK_PROJECT_PATH)/crypto/evp \
    $(NDK_PROJECT_PATH)/include \
    $(NDK_PROJECT_PATH)/include/openssl \
    $(NDK_PROJECT_PATH)/../include
local_c_flags := -DNO_WINDOWS_BRAINDEATH
include$(CLEAR_VARS)
include$(LOCAL_PATH)/../android-config.mk
LOCAL_SRC_FILES += $(local_src_files)
LOCAL_CFLAGS += $(local_c_flags)-DPURIFY
LOCAL_C_INCLUDES += $(local_c_includes)
LOCAL_SRC_FILES += $(non_arm_src_files)
LOCAL_LDLIBS += -lz
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE:=libcrypto
include $(BUILD_STATIC_LIBRARY)

(2)OpenSSL/ssl/Android.mk:

a、把所有的include$(BUILD_SHARED_LIBRARY) 修改为 include$(BUILD_STATIC_LIBRARY)。

b、ssl需要crypto的支持，因此需要引用libcrypto库

LOCAL_STATIC_LIBRARIES+= libcrypto

c、ssltest还需要连接libz，并且需要crypto和ssl库的支持，因此加上下面的两句

LOCAL_STATIC_LIBRARIES = libcryptolibssl

LOCAL_LDLIBS += -lz

d、Android.mk文件大致如下:

LOCAL_PATH:=$(call my-dir)
local_c_includes := \
    $(NDK_PROJECT_PATH) \
    $(NDK_PROJECT_PATH)/include \
    $(NDK_PROJECT_PATH)/crypto \
    $(NDK_PROJECT_PATH)/../include
local_src_files:= \
    s2_meth.c\
    s2_srvr.c\
    s2_clnt.c\
    ………\
    ………\
………\
include$(CLEAR_VARS)
include$(LOCAL_PATH)/../android-config.mk
LOCAL_SRC_FILES += $(local_src_files)
LOCAL_C_INCLUDES += $(local_c_includes)
LOCAL_STATIC_LIBRARIES += libcrypto
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE:=libssl
include$(BUILD_STATIC_LIBRARY)
 
ifeq($(WITH_HOST_DALVIK),true)
   include $(CLEAR_VARS)
   include $(LOCAL_PATH)/../android-config.mk
   LOCAL_SRC_FILES +=$(local_src_files)
   LOCAL_C_INCLUDES +=$(local_c_includes)
   LOCAL_STATIC_LIBRARIES += libcrypto
   LOCAL_MODULE_TAGS :=optional
   LOCAL_MODULE:=libssl
   include $(BUILD_STATIC_LIBRARY)
endif
 
# ssltest
include$(CLEAR_VARS)
include$(LOCAL_PATH)/../android-config.mk
LOCAL_SRC_FILES:= ssltest.c
LOCAL_C_INCLUDES += $(local_c_includes)
LOCAL_STATIC_LIBRARIES = libssl libcrypto
LOCAL_LDLIBS += -lz
LOCAL_MODULE:=ssltest
LOCAL_MODULE_TAGS := optional
include $(BUILD_EXECUTABLE)

(3)OpenSSL/app/Android.mk:

a、openssl需要连接libz，并且需要crypto和ssl库的支持，因此加上下面几句：

LOCAL_STATIC_LIBRARIES = \

Libcrypto\

libssl

LOCAL_LDLIBS += -lz

b、Android.mk文件大致如下:

LOCAL_PATH:=$(call my-dir)
include$(CLEAR_VARS)
LOCAL_SRC_FILES:= \
    app_rand.c\
    apps.c\
    asn1pars.c\
    ca.c\
    ciphers.c\
    ………\
    ………\
………\
LOCAL_STATIC_LIBRARIES := \
    libssl\
    libcrypto
LOCAL_C_INCLUDES := \
    $(NDK_PROJECT_PATH) \
    $(NDK_PROJECT_PATH)/include \
    $(NDK_PROJECT_PATH)/../include
LOCAL_CFLAGS := -DMONOLITH
include$(LOCAL_PATH)/../android-config.mk
LOCAL_CFLAGS += -DOPENSSL_NO_DTLS1
LOCAL_MODULE:=openssl
LOCAL_MODULE_TAGS := tests
LOCAL_LDLIBS += -lz
include $(BUILD_EXECUTABLE)

(4)OpenSSL/jni/Application.mk:

默认只生成armeabi版本的静态库，如果需要生成armeabi-v7a或者x86版本的静态库，需要手动修改OpenSSL/jni/Application.mk文件：

APP_ABI :=armeabi armeabi-v7a x86
APP_PROJECT_PATH := $(shell pwd)
APP_BUILD_SCRIPT := $(APP_PROJECT_PATH)/Android.mk

注意：android-config.mk文件预定义了一些宏，万不可注释掉，否则编译的过程中会出现由于宏开关问题造成的函数找不到错误!

4.2.3执行编译

启动cygwin，命令行输入 “cd /cygdrive/d/ndk/android-ndk-r10/apps/OpenSSL”即可进入到刚刚建立的工程目录,执行“ndk-build”命令，即可编译。备注：cd /cygdrive表示进入当前Cygwin安装的磁盘，这时候执行ls命令，仅显示Cygwin安装路径的盘符；例如我的安装路径在d盘下,所以“cd/cygdrive/d”就直接进入到d盘了；

4.3 编译curl

4.3.1 建立工程目录

在NDK安装目录下建立如下目录：D:\NDK\android-ndk-r10\apps\curl\jni，把下载的curl-7.37.1.tar.gz解压到D:\NDK\android-ndk-r10\apps\curl\jni目录下，目录结构如下图所示：

注意：一定要新建jni目录，并把curl源码文件放到jni目录下，否则编译的时候会出现Android NDK: Could not find application project directory !错误，原因就是在于Application.mk文件必须放在jni文件夹下

4.3.2 生成curl_config.h文件

1、要创建一个头文件curl_config.h。创建方法在jni/packages/Android/Android.mk文件头部的注释里有说明。启动Cygwin，命令行输入 “cd /cygdrive/d/ndk/android-ndk-r10/apps/curl/jni/”即可进入到刚刚建立的工程目录。

2、进入cd /cygdrive/d/ndk/android-ndk-r10/apps/curl/jni/后，执行”./configure“命令，经过漫长的checking后即可在jni/lib目录下生成curl_config.h文件

4.3.3、修改curl_config.h文件

(1) configure找不到openssl，所以所生成的配置文件是不使用openssl的，关于openssl相关的宏默认都是关闭状态，因此我们需要打开相关openssl的宏：

打开：HAVE_LIBSSL(#define HAVE_LIBSSL 1)、 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

注意：android没有编译openssl中的 engine，因此关掉HAVE_OPENSSL_ENGINE_H

(2) 注释掉宏定义HAVE_MALLOC_H和HAVE_IOCTL

(3) 注释掉宏 HAVE_GETPWUID_R 、HAVE_GETEUID、HAVE_GETPWUID，否则编译的时候会出现类似：/lib/netrc.c:84: error: undefined reference to 'getpwuid_r'之类的错误

(4) 64位和32位宏控制：把SIZEOF_LONG 、SIZEOF_OFF_T、SIZEOF_SIZE_T、SIZEOF_TIME_T、SIZEOF_VOIDP做如下修改，否则会出现类似”cur/curlrules.h:134: error: size ofarray __curl_rule_01__ is negative“之类的编译错误

/* The size of `long', as computed by sizeof. */
#ifdef __arch64__
#define SIZEOF_LONG 8
#else
#define SIZEOF_LONG 4
#endif
 
/* The size of `off_t', as computed by sizeof. */
#ifdef __arch64__
#define SIZEOF_OFF_T 8
#else
#define SIZEOF_OFF_T 4
#endif
 
/* The size of `size_t', as computed by sizeof. */
#ifdef __arch64__
#define SIZEOF_SIZE_T 8
#else
#define SIZEOF_SIZE_T 4
#endif
 
/* The size of `time_t', as computed by sizeof. */
#ifdef __arch64__
#define SIZEOF_TIME_T 8
#else
#define SIZEOF_TIME_T 4
#endif
 
/* The size of `void*', as computed by sizeof. */
#ifdef __arch64__
#define SIZEOF_VOIDP 8
#else
#define SIZEOF_VOIDP 4
#endif

4.3.4、建立openssl头文件目录以及库文件目录

（1）openssl头文件

把openssl源码库中的crypto和openssl目录文件夹拷贝到d/ndk/android-ndk-r10/apps/curl/jni/include目录下(curl头文件目录)

（2）openssl库文件

在d/ndk/android-ndk-r10/apps/curl/jni/目录下新建_library/static_a文件夹，并把编译好的openssl的三种版本的库文件拷贝到其中,如下图所示：

4.3.5、建立Aandroid.mk和Application.mk文件

1、在d/ndk/android-ndk-r10/apps/curl/jni/目录下新建Application.mk文件：

APP_ABI := armeabi armeabi-v7a x86     //依自己情况而定
APP_STL := stlport_static
APP_CPPFLAGS := -fexceptions -frtti
APP_CPPFLAGS+=-std=c++11

2、把d/ndk/android-ndk-r10/apps/curl/jni/ packages/Android/Android.mk文件拷贝到d/ndk/android-ndk-r10/apps/curl/jni/目录下，并做如下修改：

(1)“LOCAL_PATH := $(call my-dir)/../..”改成 “LOCAL_PATH := $(call my-dir)”

(2)添加对libcrypto.a和libssl.a不同版本库的引用

完整的Android.mk文件大致如下：

LOCAL_PATH :=$(call my-dir)
 
########################libArm################################
include$(CLEAR_VARS)
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include/crypto
LOCAL_MODULE    := libcryptoArm
LOCAL_SRC_FILES := _library/static_a/armeabi-v7a/libcrypto.a
include$(PREBUILT_STATIC_LIBRARY)
 
include$(CLEAR_VARS)
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include/openssl
LOCAL_MODULE    := libsslArm
LOCAL_SRC_FILES = _library/static_a/armeabi-v7a/libssl.a
include$(PREBUILT_STATIC_LIBRARY)
########################libArm#################################
 
########################libx86#################################
include$(CLEAR_VARS)
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include/crypto
LOCAL_MODULE    := libcryptox86
LOCAL_SRC_FILES := _library/static_a/x86/libcrypto.a
include$(PREBUILT_STATIC_LIBRARY)
 
include$(CLEAR_VARS)
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include/openssl
LOCAL_MODULE    := libsslx86
LOCAL_SRC_FILES = _library/static_a/x86/libssl.a
include$(PREBUILT_STATIC_LIBRARY)
############################libx86###############################
 
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_C_INCLUDES += $(LOCAL_PATH)/include
LOCAL_SRC_FILES := $(addprefix $(LOCAL_PATH)/lib/,$(CSOURCES))
LOCAL_STATIC_LIBRARIES := libcryptoArm libsslArm libcryptox86 libsslx86
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
include $(BUILD_STATIC_LIBRARY)

4.3.6执行编译

启动cygwin，命令行输入 “cd /cygdrive/d/ndk/android-ndk-r10/apps/url/jni”即可进入到刚刚建立的工程目录,执行“ndk-build”命令，即可编译

5、curl的应用

需要应用curl库函数的话，仅仅需要把curl库的“Include”文件夹和自己刚刚编译好的libcurl.a、libssl.a、libcrypto.a文件拷贝到自己的工程相应目录下，并在工程的Aandroid.mk文件中添加引用即可。例如：

LOCAL_PATH :=$(call my-dir)
 
########################libArm################################
include$(CLEAR_VARS)
LOCAL_MODULE    := libcryptoArm
LOCAL_SRC_FILES := _library/armeabi-v7a/libcrypto.a
include$(PREBUILT_STATIC_LIBRARY)
 
include$(CLEAR_VARS)
LOCAL_MODULE    := libsslArm
LOCAL_SRC_FILES = _library/armeabi-v7a/libssl.a
LOCAL_STATIC_LIBRARIES := libcryptoArm
include$(PREBUILT_STATIC_LIBRARY)
 
include$(CLEAR_VARS)
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/curl
LOCAL_MODULE    := libcurlArm
LOCAL_SRC_FILES := _library/armeabi-v7a/libcurl.a
LOCAL_STATIC_LIBRARIES := libcryptoArm libsslArm
include$(PREBUILT_STATIC_LIBRARY)
##############################################################
 
########################libx86################################
include$(CLEAR_VARS)
LOCAL_MODULE    := libcryptox86
LOCAL_SRC_FILES := _library/x86/libcrypto.a
include$(PREBUILT_STATIC_LIBRARY)
 
include$(CLEAR_VARS)
LOCAL_MODULE    := libsslx86
LOCAL_SRC_FILES = _library/x86/libssl.a
LOCAL_STATIC_LIBRARIES := libcryptox86
include$(PREBUILT_STATIC_LIBRARY)
 
include$(CLEAR_VARS)
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/curl/Include
LOCAL_MODULE    := libcurlx86
LOCAL_SRC_FILES := _library/x86/libcurl.a
LOCAL_STATIC_LIBRARIES := libcryptox86 libsslx86
include$(PREBUILT_STATIC_LIBRARY)
##############################################################
 
include$(CLEAR_VARS)
MY_SRCS :=…………
 
LOCAL_SRC_FILES := $(addprefix Source/,$(MY_SRCS))
LOCAL_C_INCLUDES = $(LOCAL_PATH)/Include
LOCAL_C_INCLUDES += $(LOCAL_PATH)/curl/Include
LOCAL_MODULE    := xxxxxx
LOCAL_SRC_FILES += xxxx.cpp
LOCAL_STATIC_LIBRARIES := libcurlArm libcurlx86
LOCAL_LDLIBS += -lz
LOCAL_LDLIBS += -llog
include$(BUILD_SHARED_LIBRARY)