It's a cache of the compiled objects. Compiling the source files takes some time, and it's faster to pull the results out of a cache.
For instance, if you 'touch main.c' and then run make (without ccache) it will compile the file again. Even if you didn't change the file, 'make' doesn't know better; it only cares about the timestamp. But if you were to use ccache, it would see that it's already compiled main.c and pull the result out of the cache. On Thu, Jun 16, 2016 at 4:24 PM, Alex Mayle <[email protected]> wrote: > I haven't used 'make' extensively until I started tinkering with the AOSP, > but isn't the whole point of it to avoid compiling things that don't need > to be recompiled? If a file and its dependencies haven't changed since the > last compilation, then there is no point in compiling it again. > > If the file doesn't need to be recompiled, we don't need ccache. If the > file does need to be recompiled, then ccache only has an outdated version. > > Does it take advantage of the fact that a large, edited source file may > have only been changed slightly? > > -- > -- > You received this message because you are subscribed to the "Android > Building" mailing list. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-building?hl=en > > --- > You received this message because you are subscribed to the Google Groups > "Android Building" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- -- You received this message because you are subscribed to the "Android Building" mailing list. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-building?hl=en --- You received this message because you are subscribed to the Google Groups "Android Building" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
