From 092bed303ec5385ae6f8d767047f9c5eee6f2a5c Mon Sep 17 00:00:00 2001
From: Alessandro Decina <alessandro.d@gmail.com>
Date: Fri, 3 Jun 2022 16:16:32 +0100
Subject: [PATCH] [SOL] build-std: pull in our compiler-builtins

When -Z build-std is used, patch compiler-builtins so that our own fork is
downloaded.

Needed for https://github.com/solana-labs/solana/pull/23465.
---
 src/cargo/core/compiler/standard_lib.rs | 12 ++++++++++--
 src/doc/src/reference/semver.md         |  2 +-
 tests/build-std/main.rs                 |  8 +++++++-
 3 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/src/cargo/core/compiler/standard_lib.rs b/src/cargo/core/compiler/standard_lib.rs
index 5272c211bd7..d064c72d44d 100644
--- a/src/cargo/core/compiler/standard_lib.rs
+++ b/src/cargo/core/compiler/standard_lib.rs
@@ -6,7 +6,7 @@ use crate::core::compiler::{CompileKind, CompileMode, RustcTargetData, Unit};
 use crate::core::profiles::{Profiles, UnitFor};
 use crate::core::resolver::features::{CliFeatures, FeaturesFor, ResolvedFeatures};
 use crate::core::resolver::HasDevUnits;
-use crate::core::{Dependency, PackageId, PackageSet, Resolve, SourceId, Workspace};
+use crate::core::{Dependency, GitReference, PackageId, PackageSet, Resolve, SourceId, Workspace};
 use crate::ops::{self, Packages};
 use crate::util::errors::CargoResult;
 use crate::Config;
@@ -78,7 +78,7 @@ pub fn resolve_std<'cfg>(
         "rustc-std-workspace-alloc",
         "rustc-std-workspace-std",
     ];
-    let patches = to_patch
+    let mut patches = to_patch
         .iter()
         .map(|&name| {
             let source_path = SourceId::for_path(&src_path.join("library").join(name))?;
@@ -86,6 +86,14 @@ pub fn resolve_std<'cfg>(
             Ok(dep)
         })
         .collect::<CargoResult<Vec<_>>>()?;
+    patches.push(Dependency::parse(
+        "compiler_builtins",
+        None,
+        SourceId::for_git(
+            &("https://github.com/solana-labs/compiler-builtins".parse()).unwrap(),
+            GitReference::Tag("solana-tools-v1.36".to_string()),
+        )?,
+    )?);
     let crates_io_url = crate::sources::CRATES_IO_INDEX.parse().unwrap();
     let patch = HashMap::from([(crates_io_url, patches)]);
     let members = vec![
diff --git a/src/doc/src/reference/semver.md b/src/doc/src/reference/semver.md
index f09250f1a9b..4a1610d0b89 100644
--- a/src/doc/src/reference/semver.md
+++ b/src/doc/src/reference/semver.md
@@ -1134,7 +1134,7 @@ pub enum E {
 fn main() {
     use updated_crate::E;
     let x = E::Variant1;
-    match x { // Error: `E::Variant2` not covered
+    match x { // Error: non-exhaustive patterns: `E::Variant2` not covered
         E::Variant1 => {}
     }
 }
diff --git a/tests/build-std/main.rs b/tests/build-std/main.rs
index 47a4bb671c0..050391fc957 100644
--- a/tests/build-std/main.rs
+++ b/tests/build-std/main.rs
@@ -111,7 +111,13 @@ fn basic() {
         // Importantly, this should not say [UPDATING]
         // There have been multiple bugs where every build triggers and update.
         .with_stderr(
-            "[COMPILING] foo v0.0.1 [..]\n\
+            "[UPDATING] git repository `https://github.com/solana-labs/compiler-builtins`\n\
+             warning: Patch `compiler_builtins v0.1.88 (https://github.com/solana-labs/compiler-builtins?tag=solana-tools-v1.36#e6395414)` was not used in the crate graph.\n\
+             Check that the patched package version and available features are compatible\n\
+             with the dependency requirements. If the patch has a different version from\n\
+             what is locked in the Cargo.lock file, run `cargo update` to use the new\n\
+             version. This may also occur with an optional dependency that is not enabled.\n\
+             [COMPILING] foo v0.0.1 [..]\n\
              [FINISHED] dev [..]",
         )
         .run();