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Add ccache support to build (via --enable-ccache configure option) #6805
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(Note that even though the Makefile infrastructure will go away with #2237, that is orthogonal to whether we easily allow |
…mpiler invocations with ccache to attempt to reuse common results, e.g. for LLVM (re)builds.
…catamorphism Fix #6805: add --enable-ccache configure option to prefix compiler invocations with `ccache` to attempt to reuse common results, e.g. for LLVM (re)builds. The information at developer [Note-ccache](../../wiki/Note-ccache) and at [ccache and clang concerns](http://petereisentraut.blogspot.fr/2011/09/ccache-and-clang-part-2.html) were what drove my introduction of the `-Qunused-arguments` and `CCACHE_CPP2` options. (Though I did confirm first-hand that at least the first really is necessary.) Yes, one certainly can re-route how `gcc` and `clang` are resolved in one's PATH and use that as a way to invoke `ccache`. But I personally do not want to introduce that change to my own PATH, and this seems like a small enough change that it does not hurt to add it, at least for now. (I don't know what form it would take when we move over to `rustpkg`.)
Closed by #6813 |
Hmm, my patch is not as effective as I had hoped. My current hypothesis is that this is because our build process is including absolute paths in the preprocessor output (i.e. becauase the One way to fix this would be to make use of the |
…dir, r=catamorphism Attempt to get reuse of common object code from multiple clones in different directories. This is a followup to issue #6805.
upper_case_acronyms: don't warn on public items Fixes rust-lang#6803 changelog: upper_case_acronyms: ignore public items
The current docs suggest that one should enable ccache by playing games with what gcc (and clang, etc) map to in one's PATH.
That is certainly one approach to the problem.
But I would prefer if it were not the only way to get the effect; I don't want to globally reroute my system's gcc/clang to ccache, and would prefer a configure option that makes our build Makefiles use the form of invoking ccache that passes along compiler as well.
I've hacked up a patch to do this on my system, so I'll assign this to myself.
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