Compiling source code can be quite slow, and frequently recompiling that
code can be extremely inefficient. Sourcery CodeBench Lite includes a tool named
arm-none-eabi-cs that solves this problem via
caching.
The caching tool intercepts compiler invocations, generates a unique signature from the source files, command-line parameters, and other environmental information, and serves the object file and warning messages directly from the cache. If the object is not currently cached then the real compiler is called, and the cache updated.
The first time you build with caching enabled you can expect the build
to take 10-30% longer. The second time you build it
might be 80% faster. The memory and CPU usage savings
may also mean it is possible to use higher levels of build parallelism
(e.g. make -j) and gain even more performance.
arm-none-eabi-cs is based on the well-known open-source
tool ccache. Refer to man cs for
more information.
There are two ways you can run the caching tool with command-line builds.
Explicitly invoke arm-none-eabi-cs. For example,
like this:
> arm-none-eabi-cs arm-none-eabi-gcc -c hello.c
or like this:
> make CC="arm-none-eabi-cs arm-none-eabi-gcc"
Add installdir/bin/cachePATH, and run your normal compile
command:
> export PATH=installdir/bin/cache:installdir/bin:$PATH > arm-none-eabi-gcc -c hello.c