Android 源码编译中的那些坑

随着Android大军的日益增多，从之前会敲HELLO WORLD就能找个不错的薪资，到现在不研究点源码都不好意思说你会Android，下面抛点Android源码编译的一些坑，os 10.12  Xcode 8.3 jdk 1.7/1.8

坑一：

Could not find a supported mac sdk: ["10.8" "10.9" "10.10" "10.11”]

解决方案：xcode版本不匹配引起的。Xcode 8.3 sdk是10.12

1，去https://github.com/phracker/MacOSX-SDKs下载对应sdk版本，如10.11

2 将下载的sdk放在目录/Applications/XCode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/中

坑二：

out/target/product/generic/obj/STATIC_LIBRARIES/libext4_intermediates/libipt_ECN.o

Infile included fromout/target/product/generic/obj/STATIC_LIBRARIES/libext4_intermediates/libipt_ECN.c:11:0:

external/iptables/extensions/../include/linux/netfilter_ipv4/ipt_ECN.h:13:37: fatal error: linux/netfilter/xt_DSCP.h: No such fileordirectory#include ^

compilation terminated.make:*** [out/target/product/generic/obj/STATIC_LIBRARIES/libext4_intermediates/libipt_ECN.o] Error1make:*** Waiting for unfinished jobs....

解决方案：在对应目录下新建xt_DSCP.h文件(/Volumes/Android/source/external/iptables/include/linux/netfilter/):

ps:你会发现有同名文件，个人怀疑区分大小写的问题，导致找不到。

/* based on ipt_FTOS.c (C) 2000 by Matthew G. Marsh

* This software is distributed under GNU GPL v2, 1991

*

* See RFC2474 for a description of the DSCP field within the IP Header.

*

* xt_DSCP.h,v 1.7 2002/03/14 12:03:13 laforge Exp

*/#ifndef _XT_DSCP_TARGET_H#define _XT_DSCP_TARGET_H#include #include /* target info */structxt_DSCP_info {        __u8 dscp;};structxt_tos_target_info {        __u8 tos_value;        __u8 tos_mask;};#endif /* _XT_DSCP_TARGET_H */

坑三：

make: *** [out/host/common/obj/JAVA_LIBRARIES/doclava_intermediates/javalib.jar] Error 41

make: *** Waiting for unfinished jobs....

解决方案：jdk正常安装的情况下，jdk环境变量配置有问题

export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home

export PATH=$JAVA_HOME/bin:$PATH

export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar