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Diffstat (limited to 'libraries/qt5/README.ccache')
| -rw-r--r-- | libraries/qt5/README.ccache | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/libraries/qt5/README.ccache b/libraries/qt5/README.ccache new file mode 100644 index 0000000000..1053bcc5c9 --- /dev/null +++ b/libraries/qt5/README.ccache @@ -0,0 +1,46 @@ +NOTES ON SETTING UP CCACHE + +Using ccache can save a lot of time when building packages, +and this is not limited to Qt5. Ccache is installed by +default on stock Slackware. + +ccache(1) has a lot of useful info on using ccache, however +I don't recommend using its method of symlinking. Instead I +recommend the following way: + +mkdir -p /usr/local/bin +ln -s /usr/bin/ccache /usr/local/bin/cc +ln -s /usr/bin/ccache /usr/local/bin/c++ +ln -s /usr/bin/ccache /usr/local/bin/gcc +ln -s /usr/bin/ccache /usr/local/bin/g++ + +Doing it this way rather than copying the ccache binary as +the man page suggests will ensure that the ccache used is +updated whenever the ccache package is. + +The cache is created in the home directory of the user using +it, and since slackbuilds are run by root that will be in +/root/.ccache, therefore ensure that you have enough free +space on the root file system for it. It is possible to put +the cache directory elsewhere though. See the man page for +info. But it would probably be fastest when on the same +file system as the build directory. + +It's also possible to host the cache on a shared NFS +directory, but be sure to test the speed before committing +to that. The man page has some notes on this. + +Since Qt5 can take a lot of build space I recommend a max +cache size of AT LEAST 6 GB. If you intend to use it all +the time then use as much as you can. The default size is +5 GB. I use 20 GB on my main build box, but use 7 GB on +workstations and servers. + +Handy commands: + +ccache -s: To show some statistics. +ccache -M <N>: To set the max cache size to N. + +(use G for GB with -M.) + +Last updated Mon 10 Dec 03:46:41 UTC 2018 |