在android中增加第三方库

目前只是在收集资料，整理验证过后，会再来修改blog.

在android中增加curl

curl是一个著名的开源文件传输协议实现软件，其中包括了HTTP、HTTPS、FTP等多种常用不常用协议的实现。
在curl最新版本的官方源代码中其实已经包括了android的编译文件（Android.mk），不过要想编译通过还需要做一些工作。

我所使用的curl版本是7.20.1，android源代码版本是 eclair 2.1。

首先将curl解压到external目录下，将目录名称改为curl（不改也可以，不过android的习惯是不带版本号，入乡随俗吧）。

（1）首先要创建一个头文件curl_config.h。创建方法在curl/Android.mk文件头部的注释里有说明。根据这个说明运行 configure。
我所使用的命令行如下（我是编译成x86版本的，不过我们的目的只是要生成curl_config.h文件，所以x86还是arm其实是一样的）：

ANDROID_ROOT=`realpath ../..` && PATH="$ANDROID_ROOT/prebuilt/linux-x86/toolchain/i686-unknown-linux-gnu-4.2.1/bin:$PATH" ./configure --host=x86-linux CC=i686-unknown-linux-gnu-gcc CPPFLAGS="-I $ANDROID_ROOT/external/curl/include/ -I $ANDROID_ROOT/external/curl -I $ANDROID_ROOT/out/target/product/eeepc/obj/STATIC_LIBRARIES/libcurl_intermediates -I $ANDROID_ROOT/system/core/include -I $ANDROID_ROOT/hardware/libhardware/include -I $ANDROID_ROOT/hardware/libhardware_legacy/include -I $ANDROID_ROOT/hardware/ril/include -I $ANDROID_ROOT/dalvik/libnativehelper/include -I $ANDROID_ROOT/frameworks/base/include -I $ANDROID_ROOT/frameworks/base/opengl/include -I $ANDROID_ROOT/external/skia/include -I $ANDROID_ROOT/out/target/product/eeepc/obj/include -I $ANDROID_ROOT/bionic/libc/arch-x86/include -I $ANDROID_ROOT/bionic/libc/include -I $ANDROID_ROOT/bionic/libstdc++/include -I $ANDROID_ROOT/bionic/libc/kernel/common -I $ANDROID_ROOT/bionic/libc/kernel/arch-x86 -I $ANDROID_ROOT/bionic/libm/include -I $ANDROID_ROOT/bionic/libm/include/i387 -I $ANDROID_ROOT/bionic/libthread_db/include -I $ANDROID_ROOT/external/openssl/include" CFLAGS="-fno-exceptions -Wno-multichar -march=i686 -m32 -fPIC -include $ANDROID_ROOT/system/core/include/arch/target_linux-x86/AndroidConfig.h -m32 -DANDROID -fmessage-length=0 -fno-strict-aliasing -Wno-unused -Winit-self -Wpointer-arith -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wpointer-arith -Wwrite-strings -Wunused -Winline -Wnested-externs -Wmissing-declarations -Wmissing-prototypes -Wno-long-long -Wfloat-equal -Wno-multichar -Wsign-compare -Wno-format-nonliteral -Wendif-labels -Wstrict-prototypes -Wdeclaration-after-statement -Wno-system-headers" LIB="$ANDROID_ROOT/prebuilt/linux-x86/toolchain/i686-unknown-linux-gnu-4.2.1/lib/gcc/i686-unknown-linux-gnu/4.2.1/libgcc.a $ANDROID_ROOT/prebuilt/linux-x86/toolchain/i686-unknown-linux-gnu-4.2.1/lib/gcc/i686-unknown-linux-gnu/4.2.1/crtbegin.o $ANDROID_ROOT/prebuilt/linux-x86/toolchain/i686-unknown-linux-gnu-4.2.1/lib/gcc/i686-unknown-linux-gnu/4.2.1/crtend.o"

（2） configure找不到openssl，所以所生成的配置文件是不使用openssl的。要想使用ssl，需要手动修改 lib/curl_config.h和src/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）

（3）修改curl/Android.mk文件，在LOCAL_C_INCLUDES变量的值中增加external/openssl/include，在 LOCAL_SYSTEM_SHARED_LIBRARIES变量的值中增加 libssl libz libcrypto。

好了现在可以编译了：

make curl ONE_SHOT_MAKEFILE=external/curl/Android.mk TARGET_PRODUCT=<...>

不过上述Android.mk文件会将libcurl编译为静态库，要想编译为动态库还需要修改一下Android.mk文件

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移植wireless tools 到android
1. 从www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Tools.html 下载wireless_tools.30.pre8.tar.gz，此版本支持non-ASCII char in ESSID
2. 解压到mydroid/external/wireless-tools目录
3. 创建Android.mk，内容如下

LOCAL_PATH:= $(call my-dir)
################## build iwlib ###################
include $(CLEAR_VARS)
LOCAL_SRC_FILES := iwlib.c
LOCAL_CFLAGS += -Wstrict-prototypes -Wmissing-prototypes -Wshadow -Wpointer-arith -Wcast-qual -Winline -MMD -fPIC
LOCAL_MODULE:= libiw
LOCAL_STATIC_LIBRARIES := libcutils libc libm
include $(BUILD_STATIC_LIBRARY)
################## build iwconfig ###################
include $(CLEAR_VARS)
LOCAL_SRC_FILES := iwconfig.c
LOCAL_CFLAGS += -Wstrict-prototypes -Wmissing-prototypes -Wshadow -Wpointer-arith -Wcast-qual -Winline -MMD -fPIC
LOCAL_MODULE:= iwconfig
LOCAL_STATIC_LIBRARIES := libcutils libc libm libiw
#LOCAL_FORCE_STATIC_EXECUTABLE := true
LOCAL_MODULE_PATH := $(TARGET_OUT_OPTIONAL_EXECUTABLES) # install to system/xbin
#LOCAL_UNSTRIPPED_PATH := $(TARGET_ROOT_OUT_UNSTRIPPED)
#LOCAL_MODULE_TAGS := eng user
include $(BUILD_EXECUTABLE)
################## build iwlist ###################
include $(CLEAR_VARS)
LOCAL_SRC_FILES := iwlist.c iwlib.h
LOCAL_CFLAGS += -Wstrict-prototypes -Wmissing-prototypes -Wshadow -Wpointer-arith -Wcast-qual -Winline -MMD -fPIC
LOCAL_MODULE:= iwlist
LOCAL_STATIC_LIBRARIES := libcutils libc libm libiw
#LOCAL_FORCE_STATIC_EXECUTABLE := true
LOCAL_MODULE_PATH := $(TARGET_OUT_OPTIONAL_EXECUTABLES) # install to system/xbin
#LOCAL_UNSTRIPPED_PATH := $(TARGET_ROOT_OUT_UNSTRIPPED)
#LOCAL_MODULE_TAGS := eng user
include $(BUILD_EXECUTABLE)

4. 修改
将wireless.22.h 更名为wireless.h
修改ifrename.c 增加getline的函数，代码可以从external/genext2fs/genext2fs.c中获得
修改iwlib.h，将#include <net/ethernet.h>改为#include <net/if_ether.h>

5. 编译
***首先编译libm***这一点是按照网上其他例子做不成功的关键
$cd mydroid/bionic/libm
$source build/envsetup.sh
$mm
$cd mydroid/external/wireless-tools
$mm

下面是编译成功的输出
[email protected]:~/android/external/wireless_tools.30$ mm
make: Entering directory `/home/fisher/android'
build/core/product_config.mk:261: WARNING: adding test OTA key
============================================
TARGET_PRODUCT=generic
TARGET_BUILD_VARIANT=eng
TARGET_SIMULATOR=
TARGET_BUILD_TYPE=release
TARGET_ARCH=arm
HOST_ARCH=x86
HOST_OS=linux
HOST_BUILD_TYPE=release
BUILD_ID=
============================================
target thumb C: libiw <= /home/fisher/android/external/wireless_tools.30/iwlib.c
In file included from /home/fisher/android/external/wireless_tools.30/iwlib.h:27,
from /home/fisher/android/external/wireless_tools.30/iwlib.c:14:
bionic/libc/include/stdlib.h:84: warning: declaration of 'abs' shadows a built-in function
bionic/libc/include/stdlib.h:88: warning: declaration of 'labs' shadows a built-in function
bionic/libc/include/stdlib.h:92: warning: declaration of 'llabs' shadows a built-in function
target StaticLib: libiw (out/target/product/generic/obj/STATIC_LIBRARIES/libiw_intermediates/libiw.a)
target Executable: iwconfig (out/target/product/generic/obj/EXECUTABLES/iwconfig_intermediates/LINKED/iwconfig)
target Non-prelinked: iwconfig (out/target/product/generic/symbols/system/bin/iwconfig)
target Strip: iwconfig (out/target/product/generic/obj/EXECUTABLES/iwconfig_intermediates/iwconfig)
target thumb C: iwlist <= /home/fisher/android/external/wireless_tools.30/iwlist.c
In file included from /home/fisher/android/external/wireless_tools.30/iwlib.h:27,
from /home/fisher/android/external/wireless_tools.30/iwlist.c:14:
bionic/libc/include/stdlib.h:84: warning: declaration of 'abs' shadows a built-in function
bionic/libc/include/stdlib.h:88: warning: declaration of 'labs' shadows a built-in function
bionic/libc/include/stdlib.h:92: warning: declaration of 'llabs' shadows a built-in function
target Executable: iwlist (out/target/product/generic/obj/EXECUTABLES/iwlist_intermediates/LINKED/iwlist)
target Non-prelinked: iwlist (out/target/product/generic/symbols/system/bin/iwlist)
target Strip: iwlist (out/target/product/generic/obj/EXECUTABLES/iwlist_intermediates/iwlist)
Install: out/target/product/generic/system/xbin/iwconfig
Install: out/target/product/generic/system/xbin/iwlist
Finding NOTICE files: out/target/product/generic/obj/NOTICE_FILES/hash-timestamp
Combining NOTICE files: out/target/product/generic/obj/NOTICE.html
gzip -c out/target/product/generic/obj/NOTICE.html > out/target/product/generic/obj/NOTICE.html.gz
make: Leaving directory `/home/fisher/android'
[email protected]:~/android/external/wireless_tools.30$

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