rustc/debian/README.source
2017-05-31 01:53:14 +02:00

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Document by Luca Bruno & Sylvestre Ledru
This source package is unfortunately quite tricky and with
several cutting edges, due to the complexity of rust-lang
bootstrapping system and the high rate of language changes
still ongoing.
We try to describe here inner packaging details and the
reasons behind them.
Import of a new upstream version
================================
$ uscan
$ gbp import-orig --upstream-branch=upstream/experimental --debian-branch=debian/experimental ../rustc_X.YY.0+dfsg1.orig.tar.xz
$ dch -v X.YY.0+dfsg1-1
$ debian/rules update-version
Embedded libraries
==================
This source package embeds several external libraries (foeked and managed
by rust upstream as git submodules).
In early stages, many more libraries were forked/emebedded but we are steadily
progressing in splitting them out.
Here below the remaining ones, with the technical reasons.
* jemalloc from https://github.com/rust-lang/jemalloc
-> system-wide one can't be used due to rust using a "je_" prefix.
This is intentional upstream design and won't change soon, see:
- https://github.com/rust-lang/rust/pull/18678
- http://smallcultfollowing.com/babysteps/blog/2014/11/14/allocators-in-rust/
* compiler-rt from https://github.com/rust-lang/compiler-rt
-> system-wide compiler-rt fails during linkage
Bug reported upstream, still to be fixed, see:
- https://github.com/rust-lang/rust/issues/15054
- https://github.com/rust-lang/rust/issues/15708
As a summary, we plan to:
* keep embedding jemalloc (probably forever)
* work with upstream to fix compiler-rt linkage soon.
-- Sylvestre Ledru <sylvestre@debian.org> Sat, 06 May 2017 13:26:08 +0200