#![no_std] support about addr2line

[est31]

leaving this to @philipc as they said they had done work on this.

[philipc]

Dependencies need to be #![no_std] too. These are done:

• gimli
• fallible-iterator
• object
• intervaltree
• smallvec
• rustc-demangle

To do:

• lazy-init
• cpp_demangle

An alternative to lazy-init is https://github.com/indiv0/lazycell, but it doesn't have no_std support either.

[est31]

Thanks @philipc added lazy-init and cpp_demangle to #89. I'm giving cpp_demangle a shot.

[est31]

cpp_demangle supports #![no_std] now, see #89.

As for lazy-init: it uses a mutex internally, which doesn't seem to exist on libcore. lazycell on the other hand uses atomics, which do exist on libcore. So it should be easier to port lazycell.

[philipc]

Found one more: Storyyeller/stable_deref_trait#2. This will need a gimli update too. Pretty sure that's the last of them though.

[est31]

Oh, probably this PR of mine won't compile successfully then: gimli-rs/gimli#306