ninja-style feature for make

[Andy Tai]

Does GNU Make have plans to support some of the ninja-style scalability
feature that speed up build when in a large tree with tens of thousands of
files?   Ninja seems to keep track of meta data about the content of the
source files that allow it to quickly skip over unchanged files.   Make
does not use any meta data about content, other than timestamps.

I guess this may violate POSIX spec for make but it seems worthwhile for
the speedup?


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Andy Tai, atai@atai.org, Skype: licheng.tai, Line: andy_tai, WeChat:
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Year 2021 民國110年
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