如何使用ccache加快编译

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Installation : sudo apt-get install -y ccache echo 'export PATH="/usr/lib/ccache:$PATH"' | tee -a ~/.bashrc \&& source ~/.bashrc && echo $PATH Your path (at least the beginning) should look like: /usr/lib/ccache:/usr/local/cuda-5.5/bin/:/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games And g++/gcc should now point to: which g++ gcc/usr/lib/ccache/g++/usr/lib/ccache/gcc Configuration : If you want no no limit to number of files and size of the cache: ccache -F 0 && ccache -M 0 Show cache statistics: ccache -s Empty the cache and reset the stats: ccache -C -z Usage : Everytime you call gcc or g++; ccache is called.My mistake was that I didn't delete already compiled files. Just delete all your cmake/output files and configure/compile again. Your ccache shouldn't be empty then. Now try a make clean and make and you'll see it is much faster than re-compiling everything thanks to the cache.