Do not install ccache unless shared_ccache is used in binarydeb #1021
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Currently the sharing of compilation artifacts through ccache is conditional after #844, which enable the support for sharing with the host using the
shared_ccache
option in the build files. The ccache binaries are currently being installed unconditionally thought.The PR changes the behavior to install the ccache binaries only when the
shared_ccache
option is being used.