关于Android源码中编译C模块的错误

一、系统环境

开发环境：ubuntu11.10

源码包：Android2.2

二、原工程（helloworld）

在Android2.2/development/hello/下创建文件hello.c和Android.mk

//hello.c#include<stdio.h>int main(){        printf("Hi,this is scan module interface...\n");        exit(0);}

##Android.mkLOCAL_PATH:=$(call my-dir)include $(CLEAR_VARS)LOCAL_MODULE := helloworldLOCAL_SRC_FILES := hello.cinclude $(BUILD_EXECUTABLE)

如上创建了文件，返回到android的根目录下，运行命令

make  helloworld

却出现如下错误：

lai@lai-ThinkPad-X61:~/af-t34$ . build/envsetup.shincluding device/htc/dream/vendorsetup.shincluding device/htc/passion/vendorsetup.shincluding device/htc/sapphire/vendorsetup.shlai@lai-ThinkPad-X61:~/af-t34$ make helloworld============================================PLATFORM_VERSION_CODENAME=RELPLATFORM_VERSION=2.2TARGET_PRODUCT=genericTARGET_BUILD_VARIANT=engTARGET_SIMULATOR=TARGET_BUILD_TYPE=releaseTARGET_BUILD_APPS=TARGET_ARCH=armHOST_ARCH=x86HOST_OS=linuxHOST_BUILD_TYPE=releaseBUILD_ID=FRF91============================================build/core/copy_headers.mk:15: 警告：覆盖关于目标“out/target/product/generic/obj/include/libpv/SsbSipMfcApi.h”的命令build/core/copy_headers.mk:15: 警告：忽略关于目标“out/target/product/generic/obj/include/libpv/SsbSipMfcApi.h”的旧命令external/opencore/build_config/opencore_dynamic/Android_opencore_common.mk:104: external/opencore/codecs_v2/video/mfc_c100/dec/Android.mk: 没有那个文件或目录external/opencore/build_config/opencore_dynamic/Android_opencore_common.mk:105: external/opencore/codecs_v2/video/mfc_c100/enc/Android.mk: 没有那个文件或目录vendor/sec/sec_proprietary/smdkc110/keychars/Android.mk:28: 警告：覆盖关于目标“out/target/product/generic/system/usr/keylayout/qwerty.kl”的命令sdk/emulator/keymaps/Android.mk:13: 警告：忽略关于目标“out/target/product/generic/system/usr/keylayout/qwerty.kl”的旧命令vendor/sec/sec_proprietary/smdkc100/keychars/Android.mk:22: 警告：覆盖关于目标“out/target/product/generic/system/usr/keylayout/s3c-keypad.kl”的命令vendor/sec/sec_proprietary/smdkc110/keychars/Android.mk:22: 警告：忽略关于目标“out/target/product/generic/system/usr/keylayout/s3c-keypad.kl”的旧命令build/core/base_rules.mk:128: *** vendor/sec/sec_proprietary/smdkc100/keychars: MODULE.TARGET.KEYCHARS.s3c-keypad.kcm already defined by vendor/sec/sec_proprietary/smdkc110/keychars。 停止。lai@lai-ThinkPad-X61:~/af-t34$ 

三、排错

首先定位错误在【build/core/base_rules.mk:128: *** vendor/sec/sec_proprietary/smdkc100/keychars: MODULE.TARGET.KEYCHARS.s3c-keypad.kcm already defined by vendor/sec/sec_proprietary/smdkc110/keychars。 停止。】

在android源码包中的“vendor/sec/sec_proprietary/”路径下有文件夹“smdkc100/keychars/”和“smdkc110/keychars/”。并且在这个两个文件夹下都有“s3c-keypad.kcm”文件。

原因可能是没有选择编译目标。

如何选择编译目标呢？看到编译源码中有一个提示，抱着试试的心里做了：

 $ make helloworld PRODUCT-sec_smdkv210-eng============================================PLATFORM_VERSION_CODENAME=RELPLATFORM_VERSION=2.2TARGET_PRODUCT=sec_smdkv210TARGET_BUILD_VARIANT=engTARGET_SIMULATOR=TARGET_BUILD_TYPE=releaseTARGET_BUILD_APPS=TARGET_ARCH=armHOST_ARCH=x86HOST_OS=linuxHOST_BUILD_TYPE=releaseBUILD_ID=FRF91============================================

结果还真成了，out/target/product/smdkv210/system/bin/文件夹中找到了helloworld的二进制文件。

四、运行测试

开机，连接usb数据线。拷贝helloworld到android的文件系统中：

adb push helloworld /data/

然后到terminal中运行里

# ./helloworld                                                                 Hi,this is scan module interface...

在此感谢网友Jeffery ~~