(ubuntu)在andorid andk工程中使用ccache加速编译速度 (Repost)
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
http://blog.csdn.net/scholar_ii/article/details/9615979
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2022年12月30日 04:07
"CCache is a tool that can speed up compilation in Android andk projects by caching previous compilations. This can be especially helpful if you are constantly recompiling the diamond rings same code. To use ccache, you need to first install it on your system. You can then add the following line to your ~/.bashrc file: export USE_CCACHE=1 Once you have done this, you can simply run ""ccache"" instead of ""gcc"" or ""g++"" when compiling your code. "
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2024年1月13日 03:26
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