Move Rust provided objects, libraries and binaries meant for self-contained linkage to separate directory

[mati865]

Proposal

This affects only three targets: windows-gnu, linux-musl, -wasi.
Currently startup objects (all three targets) and libraries (windows-gnu) and placed next to Rust's own libraries like libstd.
This causes various problems, e.g. somebody wants to link external libraries with Rust but CRT shipped by Rust is incompatible with the one used to link external library.
For windows-gnu there is also linker shipped.

rust-lang/rust#68887 (comment) explains how to resolve that limitation by creating native and self-contained modes. Native mode would avoid using anything located inside self-contained directory.

rust-lang/rust#72999 is preparation that moves things but retains old user visible behaviour (everything is linked just like before, only the paths are different).

Mentors or Reviewers

@petrochenkov

Process

The main points of the Major Change Process is as follows:

• File an issue describing the proposal.
• A compiler team member or contributor who is knowledgeable in the area can second by writing @rustbot second.
  • Finding a "second" suffices for internal changes. If however you are proposing a new public-facing feature, such as a -C flag, then full team check-off is required.
  • Compiler team members can initiate a check-off via @rfcbot fcp merge on either the MCP or the PR.
• Once an MCP is seconded, the Final Comment Period begins. If no objections are raised after 10 days, the MCP is considered approved.

You can read more about Major Change Proposals on forge.

Comments

This issue is not meant to be used for technical discussion. There is a Zulip stream for that. Use this issue to leave procedural comments, such as volunteering to review, indicating that you second the proposal (or third, etc), or raising a concern that you would like to be addressed.

[rustbot]

This issue is not meant to be used for technical discussion. There is a Zulip stream for that. Use this issue to leave procedural comments, such as volunteering to review, indicating that you second the proposal (or third, etc), or raising a concern that you would like to be addressed.

[nikomatsakis]

@mati865 you're meant to replace this text:

Insert your proposal here, overwriting this text. Please include the complete proposal, rather than linking to a gist or other external document.

with the actual proposal...I at least don't really know what your proposal is based only on the title alone. :)

[mati865]

@nikomatsakis I've accidentality hit enter while typing the title and it opened the issue... 😬
Updated the text.

[mati865]

Seems like zulip thread doesn't exist?

[rustbot]

This issue is not meant to be used for technical discussion. There is a Zulip stream for that. Use this issue to leave procedural comments, such as volunteering to review, indicating that you second the proposal (or third, etc), or raising a concern that you would like to be addressed.