Auto merge of #59800 - Zoxc:less-dylibs, r=alexcrichton

rustc: Remove `dylib` crate type from most rustc crates

Revival of #56987

cc @alexcrichton
r? @michaelwoerister

Author: bors

Cargo.lock

@@ -2691,7 +2691,6 @@ dependencies = [
  "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "chalk-engine 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "flate2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "fmt_macros 0.0.0",
  "graphviz 0.0.0",
  "jobserver 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2714,7 +2713,6 @@ dependencies = [
  "smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "syntax 0.0.0",
  "syntax_pos 0.0.0",
- "tempfile 3.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2946,7 +2944,6 @@ name = "rustc_apfloat"
 version = "0.0.0"
 dependencies = [
  "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_cratesio_shim 0.0.0",
  "smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -2984,6 +2981,7 @@ dependencies = [
  "num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-demangle 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc_llvm 0.0.0",
+ "tempfile 3.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -3030,15 +3028,6 @@ dependencies = [
  "syntax_pos 0.0.0",
 ]
 
-[[package]]
-name = "rustc_cratesio_shim"
-version = "0.0.0"
-dependencies = [
- "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "rustc_data_structures"
 version = "0.0.0"
@@ -3054,7 +3043,6 @@ dependencies = [
  "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-rayon 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-rayon-core 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_cratesio_shim 0.0.0",
  "serialize 0.0.0",
  "smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "stable_deref_trait 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3103,7 +3091,6 @@ dependencies = [
  "annotate-snippets 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_cratesio_shim 0.0.0",
  "rustc_data_structures 0.0.0",
  "serialize 0.0.0",
  "syntax_pos 0.0.0",
@@ -3333,7 +3320,6 @@ version = "0.0.0"
 dependencies = [
  "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_cratesio_shim 0.0.0",
  "rustc_data_structures 0.0.0",
  "serialize 0.0.0",
  "syntax_pos 0.0.0",

src/libarena/Cargo.toml

@@ -7,7 +7,6 @@ edition = "2018"
 [lib]
 name = "arena"
 path = "lib.rs"
-crate-type = ["dylib"]
 
 [dependencies]
 rustc_data_structures = { path = "../librustc_data_structures" }

src/libfmt_macros/Cargo.toml

@@ -11,3 +11,4 @@ crate-type = ["dylib"]
 
 [dependencies]
 syntax_pos = { path = "../libsyntax_pos" }
+

src/libgraphviz/Cargo.toml

@@ -7,4 +7,3 @@ edition = "2018"
 [lib]
 name = "graphviz"
 path = "lib.rs"
-crate-type = ["dylib"]

src/librustc/Cargo.toml

@@ -7,7 +7,7 @@ edition = "2018"
 [lib]
 name = "rustc"
 path = "lib.rs"
-crate-type = ["dylib"]
+doctest = false
 
 [dependencies]
 arena = { path = "../libarena" }
@@ -37,33 +37,3 @@ chalk-engine = { version = "0.9.0", default-features=false }
 rustc_fs_util = { path = "../librustc_fs_util" }
 smallvec = { version = "0.6.7", features = ["union", "may_dangle"] }
 measureme = "0.3"
-
-# Note that these dependencies are a lie, they're just here to get linkage to
-# work.
-#
-# We're creating a bunch of dylibs for the compiler but we're also compiling a
-# bunch of crates.io crates. Everything in the compiler is compiled as an
-# rlib/dylib pair but all crates.io crates tend to just be rlibs. This means
-# we've got a problem for dependency graphs that look like:
-#
-#           foo - rustc_codegen_llvm
-#         /                  \
-#   rustc                     ---- rustc_driver
-#         \                     /
-#           foo - rustc_metadata
-#
-# Here the crate `foo` is linked into the `rustc_codegen_llvm` and the
-# `rustc_metadata` dylibs, meaning we've got duplicate copies! When we then
-# go to link `rustc_driver` the compiler notices this and gives us a compiler
-# error.
-#
-# To work around this problem we just add these crates.io dependencies to the
-# `rustc` crate which is a shared dependency above. That way the crate `foo`
-# shows up in the dylib for the `rustc` crate, deduplicating it and allowing
-# crates like `rustc_codegen_llvm` to use `foo` *through* the `rustc` crate.
-#
-# tl;dr; this is not needed to get `rustc` to compile, but if you remove it then
-#        later crate stop compiling. If you can remove this and everything
-#        compiles, then please feel free to do so!
-flate2 = "1.0"
-tempfile = "3.0"

src/librustc/lib.rs

@@ -46,7 +46,6 @@
 #![feature(extern_types)]
 #![feature(nll)]
 #![feature(non_exhaustive)]
-#![feature(proc_macro_internals)]
 #![feature(optin_builtin_traits)]
 #![feature(range_is_empty)]
 #![feature(rustc_diagnostic_macros)]
@@ -90,10 +89,8 @@ extern crate serialize as rustc_serialize;
 
 #[macro_use] extern crate smallvec;
 
-// Note that librustc doesn't actually depend on these crates, see the note in
-// `Cargo.toml` for this crate about why these are here.
-#[allow(unused_extern_crates)]
-extern crate flate2;
+// Use the test crate here so we depend on getopts through it. This allow tools to link to both
+// librustc_driver and libtest.
 #[allow(unused_extern_crates)]
 extern crate test;
 

src/librustc_allocator/Cargo.toml

@@ -6,7 +6,6 @@ edition = "2018"
 
 [lib]
 path = "lib.rs"
-crate-type = ["dylib"]
 test = false
 
 [dependencies]

src/librustc_apfloat/Cargo.toml

@@ -10,5 +10,4 @@ path = "lib.rs"
 
 [dependencies]
 bitflags = "1.0"
-rustc_cratesio_shim = { path = "../librustc_cratesio_shim" }
 smallvec = { version = "0.6.7", features = ["union", "may_dangle"] }

src/librustc_apfloat/lib.rs

@@ -35,9 +35,6 @@
 #![deny(rust_2018_idioms)]
 
 #![feature(nll)]
-// See librustc_cratesio_shim/Cargo.toml for a comment explaining this.
-#[allow(unused_extern_crates)]
-extern crate rustc_cratesio_shim;
 
 use std::cmp::Ordering;
 use std::fmt;

src/librustc_borrowck/Cargo.toml

@@ -7,8 +7,8 @@ edition = "2018"
 [lib]
 name = "rustc_borrowck"
 path = "lib.rs"
-crate-type = ["dylib"]
 test = false
+doctest = false
 
 [dependencies]
 log = "0.4"