WIP: Link to libgcc when statically linking musl

Author: Amanieu

.github/workflows/ci.yml

@@ -152,6 +152,15 @@ jobs:
           - name: dist-x86_64-linux
             os: ubuntu-latest-xl
             env: {}
+          - name: dist-various-1
+            os: ubuntu-latest-xl
+            env: {}
+          - name: dist-i586-gnu-i586-i686-musl
+            os: ubuntu-latest-xl
+            env: {}
+          - name: dist-x86_64-musl
+            os: ubuntu-latest-xl
+            env: {}
     timeout-minutes: 600
     runs-on: "${{ matrix.os }}"
     steps:

Cargo.lock

@@ -1808,8 +1808,7 @@ checksum = "b294d6fa9ee409a054354afc4352b0b9ef7ca222c69b8812cbea9e7d2bf3783f"
 [[package]]
 name = "libc"
 version = "0.2.71"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9457b06509d27052635f90d6466700c65095fdf75409b3fbdd903e988b886f49"
+source = "git+https://github.com/Amanieu/libc?branch=musl_libgcc2#09bdb4650962ad574403488776e1e200e949451d"
 dependencies = [
  "rustc-std-workspace-core",
 ]

Cargo.toml

@@ -79,5 +79,7 @@ rustc-std-workspace-core = { path = 'src/tools/rustc-std-workspace-core' }
 rustc-std-workspace-alloc = { path = 'src/tools/rustc-std-workspace-alloc' }
 rustc-std-workspace-std = { path = 'src/tools/rustc-std-workspace-std' }
 
+libc = { git = "https://github.com/Amanieu/libc", branch = "musl_libgcc2" }
+
 [patch."https://github.com/rust-lang/rust-clippy"]
 clippy_lints = { path = "src/tools/clippy/clippy_lints" }

src/ci/azure-pipelines/try.yml

@@ -26,6 +26,9 @@ jobs:
   strategy:
     matrix:
       dist-x86_64-linux: {}
+      dist-various-1: {}
+      dist-i586-gnu-i586-i686-musl: {}
+      dist-x86_64-musl: {}
 
 # The macOS and Windows builds here are currently disabled due to them not being
 # overly necessary on `try` builds. We also don't actually have anything that

src/ci/github-actions/ci.yml

@@ -281,6 +281,15 @@ jobs:
           - name: dist-x86_64-linux
             <<: *job-linux-xl
 
+          - name: dist-various-1
+            <<: *job-linux-xl
+
+          - name: dist-i586-gnu-i586-i686-musl
+            <<: *job-linux-xl
+
+          - name: dist-x86_64-musl
+            <<: *job-linux-xl
+
   auto:
     <<: *base-ci-job
     name: auto

src/tools/tidy/src/extdeps.rs

@@ -4,7 +4,10 @@ use std::fs;
 use std::path::Path;
 
 /// List of whitelisted sources for packages.
-const WHITELISTED_SOURCES: &[&str] = &["\"registry+https://github.com/rust-lang/crates.io-index\""];
+const WHITELISTED_SOURCES: &[&str] = &[
+    "\"registry+https://github.com/rust-lang/crates.io-index\"",
+    "\"git+https://github.com/Amanieu/libc?branch=musl_libgcc2#09bdb4650962ad574403488776e1e200e949451d\"",
+];
 
 /// Checks for external package sources.
 pub fn check(path: &Path, bad: &mut bool) {