On Thursday 31 of January 2013, Michael Stahl wrote:
i haven't measured it but i guess the majority of the problem is first
writing the Object .d files,
I have. Replacing concat-deps calls with mkdir+touch (for which there is a
builtin) cuts the [build DEP] phase in tail_build to almost a half. But even
as it is, the time spent that way is insignificant compared to the whole of
the build.
of which there are a lot more than
LinkTarget .d files. which should make it easier because iirc object .d
files are just "echo foo: .PHONY > foo.d" while concat-deps has a bit of
LO-specific logic (rewriting external headers to .done files, which is
necessary for correctness of incremental builds) that doesn't make sense
as a make builtin.
Although concat-deps is not a trivial code, it's not that complicated either,
and the builtins are already LO-specific code anyway.
--
Lubos Lunak
l.lunak@suse.cz
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