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.so real 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.so real 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