rust: Cleanup commit to prepare for new bootstrap.

This commit is not atomic and is not functional by itself; this is done so to
make the next set of changes more comprehensible.

* gnu/packages/patches/rust-1.19-mrustc.patch: Delete file.
* gnu/packages/patches/rust-1.30-gdb-llvm.patch: Likewise.
* gnu/packages/patches/rust-bootstrap-stage0-test.patch: Likewise.
* gnu/local.mk (dist_patch_DATA): Un-register files.
* gnu/packages/rust.scm (mrustc): Delete variable.
(rust-1.19, rust-1.20, rust-1.21 rust-1.22, rust-1.23, rust-1.24)
(rust-1.25, rust-1.26, rust-1.27, rust-1.28, rust-1.29)
(rust-1.30): Delete variables.
(rust-1.31 through rust-1.49): Fix indentation and do other cosmetic changes.
(rust): Define as rust-1.49.

gnu/local.mk

@@ -1599,11 +1599,9 @@ dist_patch_DATA =						\
   %D%/packages/patches/ruby-sanitize-system-libxml.patch	\
   %D%/packages/patches/ruby-tzinfo-data-ignore-broken-test.patch\
   %D%/packages/patches/runc-CVE-2019-5736.patch			\
-  %D%/packages/patches/rust-1.19-mrustc.patch			\
   %D%/packages/patches/rust-1.25-accept-more-detailed-gdb-lines.patch \
   %D%/packages/patches/rust-1.45-linker-locale.patch		\
   %D%/packages/patches/rust-1.48-linker-locale.patch		\
-  %D%/packages/patches/rust-bootstrap-stage0-test.patch		\
   %D%/packages/patches/rust-coresimd-doctest.patch		\
   %D%/packages/patches/rust-ndarray-remove-blas-src-dep.patch	\
   %D%/packages/patches/rust-nettle-disable-vendor.patch		 \

gnu/packages/patches/rust-1.19-mrustc.patch

@@ -1,28 +0,0 @@
-See https://github.com/thepowersgang/mrustc/archive/v0.8.0.tar.gz
-
---- rustc-1.19.0-src-orig/src/libcore/intrinsics.rs
-+++ rustc-1.19.0-src/src/libcore/intrinsics.rs
-@@ -678,5 +678,9 @@
-     pub fn min_align_of_val<T: ?Sized>(_: &T) -> usize;
- 
-+    /// Obtain the length of a slice pointer
-+    #[cfg(rust_compiler="mrustc")]
-+    pub fn mrustc_slice_len<T>(pointer: *const [T]) -> usize;
-+
-     /// Gets a static string slice containing the name of a type.
-     pub fn type_name<T: ?Sized>() -> &'static str;
-
---- rustc-1.19.0-src-orig/src/libcore/slice/mod.rs
-+++ rustc-1.19.0-src/src/libcore/slice/mod.rs
-@@ -413,6 +413,8 @@
-     #[inline]
-     fn len(&self) -> usize {
--        unsafe {
--            mem::transmute::<&[T], Repr<T>>(self).len
--        }
-+        #[cfg(not(rust_compiler="mrustc"))]
-+        let rv = unsafe { mem::transmute::<&[T], Repr<T>>(self).len };
-+        #[cfg(rust_compiler="mrustc")]
-+        let rv = unsafe { ::intrinsics::mrustc_slice_len(self) };
-+        rv
-     }

gnu/packages/patches/rust-1.30-gdb-llvm.patch

@@ -1,89 +0,0 @@
-Tweak some gdb tests which were broken during LLVM upgrades.
-This has been subsequently fixed upstream in later rustc versions,
-but still needed to bootstrap some earlier versions of the compiler.
-
-diff -r -u rustc-1.30.1-src-orig/src/test/debuginfo/borrowed-c-style-enum.rs rustc-1.30.1-src/src/test/debuginfo/borrowed-c-style-enum.rs
---- rustc-1.30.1-src-orig/src/test/debuginfo/borrowed-c-style-enum.rs	2019-02-04 12:49:34.055483896 -0800
-+++ rustc-1.30.1-src/src/test/debuginfo/borrowed-c-style-enum.rs	2019-02-04 13:01:10.915950356 -0800
-@@ -18,15 +18,15 @@
- 
- // gdb-command:print *the_a_ref
- // gdbg-check:$1 = TheA
--// gdbr-check:$1 = borrowed_c_style_enum::ABC::TheA
-+// gdbr-check:$1 = borrowed_c_style_enum::TheA
- 
- // gdb-command:print *the_b_ref
- // gdbg-check:$2 = TheB
--// gdbr-check:$2 = borrowed_c_style_enum::ABC::TheB
-+// gdbr-check:$2 = borrowed_c_style_enum::TheB
- 
- // gdb-command:print *the_c_ref
- // gdbg-check:$3 = TheC
--// gdbr-check:$3 = borrowed_c_style_enum::ABC::TheC
-+// gdbr-check:$3 = borrowed_c_style_enum::TheC
- 
- 
- // === LLDB TESTS ==================================================================================
-diff -r -u rustc-1.30.1-src-orig/src/test/debuginfo/c-style-enum-in-composite.rs rustc-1.30.1-src/src/test/debuginfo/c-style-enum-in-composite.rs
---- rustc-1.30.1-src-orig/src/test/debuginfo/c-style-enum-in-composite.rs	2019-02-04 12:49:34.051483727 -0800
-+++ rustc-1.30.1-src/src/test/debuginfo/c-style-enum-in-composite.rs	2019-02-04 13:02:00.981997525 -0800
-@@ -19,31 +19,31 @@
- 
- // gdb-command:print tuple_interior_padding
- // gdbg-check:$1 = {__0 = 0, __1 = OneHundred}
--// gdbr-check:$1 = (0, c_style_enum_in_composite::AnEnum::OneHundred)
-+// gdbr-check:$1 = (0, c_style_enum_in_composite::OneHundred)
- 
- // gdb-command:print tuple_padding_at_end
- // gdbg-check:$2 = {__0 = {__0 = 1, __1 = OneThousand}, __1 = 2}
--// gdbr-check:$2 = ((1, c_style_enum_in_composite::AnEnum::OneThousand), 2)
-+// gdbr-check:$2 = ((1, c_style_enum_in_composite::OneThousand), 2)
- 
- // gdb-command:print tuple_different_enums
- // gdbg-check:$3 = {__0 = OneThousand, __1 = MountainView, __2 = OneMillion, __3 = Vienna}
--// gdbr-check:$3 = (c_style_enum_in_composite::AnEnum::OneThousand, c_style_enum_in_composite::AnotherEnum::MountainView, c_style_enum_in_composite::AnEnum::OneMillion, c_style_enum_in_composite::AnotherEnum::Vienna)
-+// gdbr-check:$3 = (c_style_enum_in_composite::OneThousand, c_style_enum_in_composite::MountainView, c_style_enum_in_composite::OneMillion, c_style_enum_in_composite::Vienna)
- 
- // gdb-command:print padded_struct
- // gdbg-check:$4 = {a = 3, b = OneMillion, c = 4, d = Toronto, e = 5}
--// gdbr-check:$4 = c_style_enum_in_composite::PaddedStruct {a: 3, b: c_style_enum_in_composite::AnEnum::OneMillion, c: 4, d: c_style_enum_in_composite::AnotherEnum::Toronto, e: 5}
-+// gdbr-check:$4 = c_style_enum_in_composite::PaddedStruct {a: 3, b: c_style_enum_in_composite::OneMillion, c: 4, d: c_style_enum_in_composite::Toronto, e: 5}
- 
- // gdb-command:print packed_struct
- // gdbg-check:$5 = {a = 6, b = OneHundred, c = 7, d = Vienna, e = 8}
--// gdbr-check:$5 = c_style_enum_in_composite::PackedStruct {a: 6, b: c_style_enum_in_composite::AnEnum::OneHundred, c: 7, d: c_style_enum_in_composite::AnotherEnum::Vienna, e: 8}
-+// gdbr-check:$5 = c_style_enum_in_composite::PackedStruct {a: 6, b: c_style_enum_in_composite::OneHundred, c: 7, d: c_style_enum_in_composite::Vienna, e: 8}
- 
- // gdb-command:print non_padded_struct
- // gdbg-check:$6 = {a = OneMillion, b = MountainView, c = OneThousand, d = Toronto}
--// gdbr-check:$6 = c_style_enum_in_composite::NonPaddedStruct {a: c_style_enum_in_composite::AnEnum::OneMillion, b: c_style_enum_in_composite::AnotherEnum::MountainView, c: c_style_enum_in_composite::AnEnum::OneThousand, d: c_style_enum_in_composite::AnotherEnum::Toronto}
-+// gdbr-check:$6 = c_style_enum_in_composite::NonPaddedStruct {a: c_style_enum_in_composite::OneMillion, b: c_style_enum_in_composite::MountainView, c: c_style_enum_in_composite::OneThousand, d: c_style_enum_in_composite::Toronto}
- 
- // gdb-command:print struct_with_drop
- // gdbg-check:$7 = {__0 = {a = OneHundred, b = Vienna}, __1 = 9}
--// gdbr-check:$7 = (c_style_enum_in_composite::StructWithDrop {a: c_style_enum_in_composite::AnEnum::OneHundred, b: c_style_enum_in_composite::AnotherEnum::Vienna}, 9)
-+// gdbr-check:$7 = (c_style_enum_in_composite::StructWithDrop {a: c_style_enum_in_composite::OneHundred, b: c_style_enum_in_composite::Vienna}, 9)
- 
- // === LLDB TESTS ==================================================================================
- 
-diff -r -u rustc-1.30.1-src-orig/src/test/debuginfo/gdb-pretty-struct-and-enums-pre-gdb-7-7.rs rustc-1.30.1-src/src/test/debuginfo/gdb-pretty-struct-and-enums-pre-gdb-7-7.rs
---- rustc-1.30.1-src-orig/src/test/debuginfo/gdb-pretty-struct-and-enums-pre-gdb-7-7.rs	2019-02-04 12:49:34.043483393 -0800
-+++ rustc-1.30.1-src/src/test/debuginfo/gdb-pretty-struct-and-enums-pre-gdb-7-7.rs	2019-02-04 13:02:17.954691634 -0800
-@@ -27,15 +27,15 @@
- 
- // gdb-command: print c_style_enum1
- // gdbg-check:$3 = CStyleEnumVar1
--// gdbr-check:$3 = gdb_pretty_struct_and_enums_pre_gdb_7_7::CStyleEnum::CStyleEnumVar1
-+// gdbr-check:$3 = gdb_pretty_struct_and_enums_pre_gdb_7_7::CStyleEnumVar1
- 
- // gdb-command: print c_style_enum2
- // gdbg-check:$4 = CStyleEnumVar2
--// gdbr-check:$4 = gdb_pretty_struct_and_enums_pre_gdb_7_7::CStyleEnum::CStyleEnumVar2
-+// gdbr-check:$4 = gdb_pretty_struct_and_enums_pre_gdb_7_7::CStyleEnumVar2
- 
- // gdb-command: print c_style_enum3
- // gdbg-check:$5 = CStyleEnumVar3
--// gdbr-check:$5 = gdb_pretty_struct_and_enums_pre_gdb_7_7::CStyleEnum::CStyleEnumVar3
-+// gdbr-check:$5 = gdb_pretty_struct_and_enums_pre_gdb_7_7::CStyleEnumVar3
- 
- #![allow(dead_code, unused_variables)]

gnu/packages/patches/rust-bootstrap-stage0-test.patch

@@ -1,55 +0,0 @@
-Bootstrap tests failed with local stage0 cargo and rustc
-Backported changes from https://github.com/rust-lang/rust/pull/51977
-
-From 0834d9d771e912f51deca6c25699e44734624546 Mon Sep 17 00:00:00 2001
-From: Nikolai Merinov <nikolai.merinov@member.fsf.org>
-Date: Mon, 2 Jul 2018 01:45:35 +0500
-Subject: [PATCH] bootstrap: tests should use rustc from config.toml
-
-Tests should always use "rustc" and "cargo" from config.toml instead
-of assuming that stage0 binaries was downloaded to build directory.
----
- src/bootstrap/bootstrap.py | 2 ++
- src/bootstrap/config.rs    | 6 ++----
- 2 files changed, 4 insertions(+), 4 deletions(-)
-
-diff --git a/src/bootstrap/bootstrap.py b/src/bootstrap/bootstrap.py
-index 487440becf..1701f7b83a 100644
---- a/src/bootstrap/bootstrap.py
-+++ b/src/bootstrap/bootstrap.py
-@@ -788,6 +788,8 @@ def bootstrap(help_triggered):
-     env["BOOTSTRAP_PARENT_ID"] = str(os.getpid())
-     env["BOOTSTRAP_PYTHON"] = sys.executable
-     env["BUILD_DIR"] = build.build_dir
-+    env["CARGO"] = build.cargo()
-+    env["RUSTC"] = build.rustc()
-     run(args, env=env, verbose=build.verbose)
- 
- 
-diff --git a/src/bootstrap/config.rs b/src/bootstrap/config.rs
-index 6dd6291be2..d1a0deb583 100644
---- a/src/bootstrap/config.rs
-+++ b/src/bootstrap/config.rs
-@@ -23,7 +23,6 @@ use std::cmp;
- 
- use num_cpus;
- use toml;
--use util::exe;
- use cache::{INTERNER, Interned};
- use flags::Flags;
- pub use flags::Subcommand;
-@@ -362,9 +361,8 @@ impl Config {
-         config.src = Config::path_from_python("SRC");
-         config.out = Config::path_from_python("BUILD_DIR");
- 
--        let stage0_root = config.out.join(&config.build).join("stage0/bin");
--        config.initial_rustc = stage0_root.join(exe("rustc", &config.build));
--        config.initial_cargo = stage0_root.join(exe("cargo", &config.build));
-+        config.initial_rustc = Config::path_from_python("RUSTC");
-+        config.initial_cargo = Config::path_from_python("CARGO");
- 
-         config
-     }
--- 
-2.17.1
-