本文主要是介绍(ubuntu)在andorid andk工程中使用ccache加速编译速度，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
环境
系统：Linux luogw-pc 3.5.0-36-generic #57~precise1-Ubuntu SMP Thu Jun 20 18:21:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
ndk: ndk-r8d
cache: ccache version 3.1.6
第一步：安装ccache
sudo apt-get install ccache
第二步：配置ccache
添加环境变量 export NDK_CCACHE=ccache
第三步：修改 android-ndk-r8e/build/core/default-build-commands.mk
注：红色部份为修改的内容，原内容被注释掉
#
# IMPORTANT: The following definitions must use lazy assignment because
# the value of TOOLCHAIN_PREFIX or TARGET_CFLAGS can be changed later by
# the toolchain's setup.mk script.
#
ifneq ($(findstring ccc-analyzer,$(CC)),)
TARGET_CC = $(CC)
else
#TARGET_CC = $(TOOLCHAIN_PREFIX)gcc
TARGET_CC = ccache $(TOOLCHAIN_PREFIX)gcc
endif
TARGET_CFLAGS =
ifneq ($(findstring c++-analyzer,$(CXX)),)
TARGET_CXX = $(CXX)
else
#TARGET_CXX = $(TOOLCHAIN_PREFIX)g++
TARGET_CXX = ccache $(TOOLCHAIN_PREFIX)g++
endif
TARGET_CXXFLAGS = $(TARGET_CFLAGS) -fno-exceptions -fno-rtti
实践对比：
使用ccache前后情况对比如下
luogw@luogw-pc:~/study/bitmap-plasma$ ccache -s
cache directory /home/luogw/.ccache
cache hit (direct) 0
cache hit (preprocessed) 0
cache miss 0
files in cache 0
cache size 0 Kbytes
max cache size 1.0 Gbytes
luogw@luogw-pc:~/study/bitmap-plasma$ time ndk-build
Gdbserver : [arm-linux-androideabi-4.7] libs/armeabi/gdbserver
Gdbsetup : libs/armeabi/gdb.setup
Gdbserver : [arm-linux-androideabi-4.7] libs/armeabi-v7a/gdbserver
Gdbsetup : libs/armeabi-v7a/gdb.setup
Compile thumb : plasma <= plasma.c
SharedLibrary : libplasma.so
Install : libplasma.so => libs/armeabi/libplasma.so
Compile thumb : plasma <= plasma.c
SharedLibrary : libplasma.so
Install : libplasma.so => libs/armeabi-v7a/libplasma.soreal 0m0.226s
user 0m0.128s
sys 0m0.032s
luogw@luogw-pc:~/study/bitmap-plasma$ ccache -s
cache directory /home/luogw/.ccache
cache hit (direct) 0
cache hit (preprocessed) 0
cache miss 2
called for link 2
multiple source files 2
files in cache 6
cache size 108 Kbytes
max cache size 1.0 Gbytes
luogw@luogw-pc:~/study/bitmap-plasma$ rm -r libs/ obj/
luogw@luogw-pc:~/study/bitmap-plasma$ time ndk-build
Gdbserver : [arm-linux-androideabi-4.7] libs/armeabi/gdbserver
Gdbsetup : libs/armeabi/gdb.setup
Gdbserver : [arm-linux-androideabi-4.7] libs/armeabi-v7a/gdbserver
Gdbsetup : libs/armeabi-v7a/gdb.setup
Compile thumb : plasma <= plasma.c
SharedLibrary : libplasma.so
Install : libplasma.so => libs/armeabi/libplasma.so
Compile thumb : plasma <= plasma.c
SharedLibrary : libplasma.so
Install : libplasma.so => libs/armeabi-v7a/libplasma.soreal 0m0.114s
user 0m0.052s
sys 0m0.008s
luogw@luogw-pc:~/study/bitmap-plasma$ ccache -s
cache directory /home/luogw/.ccache
cache hit (direct) 2
cache hit (preprocessed) 0
cache miss 2
called for link 4
multiple source files 4
files in cache 6
cache size 108 Kbytes
max cache size 1.0 Gbytes
参考文章：
1）http://www.41post.com/4509/programming/android-use-ccache-with-android-ndk-in-cygwin
2）http://www.mirwing.com/2011/11/android-android-ndk-revision-7.html
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