[R-pkg-devel] speeding up package code/build/test cycle
tom@@@k@||ber@ @end|ng |rom gm@||@com
Fri Jun 25 08:22:02 CEST 2021
On 6/24/21 11:31 PM, Duncan Murdoch wrote:
> On 24/06/2021 4:52 p.m., Dirk Eddelbuettel wrote:
>> On 24 June 2021 at 16:31, Duncan Murdoch wrote:
>> | This does the full compile again, so it's slow.
>> ccache fixes that (as it has its own cache). It also works on macOS.
> I haven't tried ccache: shouldn't "make" handle that kind of thing?
In principle, yes, and I think one should not need ccache for package
development when make files are designed well.
But there is a case for ccache. If for whatever reason one decides to do
a "clean" build in "make" sense often, ccache can help. For example when
you are working on the build system itself, on the make file or
MXE (used to build the experimental UCRT toolchain for Windows) uses
ccache when building external software, there clean re-builds are a
common task (newer versions of that software, slightly changed build
configuration) and some builds take forever when the projects are large.
ccache could help also when switching between code versions in the same
workspace (via a versioning system), or when building same files in
different directories (and not handled by the build system).
> Duncan Murdoch
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