Rollup merge of rust-lang#82218 - rylev:copy-pdbs, r=Mark-Simulacrum

Make sure pdbs are copied along with exe and dlls when bootstrapping

This makes it easier to find the pdbs when wanting to debug the compiler on Windows.

Author: Dylan-DPC

src/bootstrap/compile.rs

@@ -27,7 +27,7 @@ use crate::config::TargetSelection;
 use crate::dist;
 use crate::native;
 use crate::tool::SourceType;
-use crate::util::{exe, is_dylib, symlink_dir};
+use crate::util::{exe, is_debug_info, is_dylib, symlink_dir};
 use crate::{Compiler, DependencyType, GitRepo, Mode};
 
 #[derive(Debug, PartialOrd, Ord, Copy, Clone, PartialEq, Eq, Hash)]
@@ -1049,7 +1049,8 @@ impl Step for Assemble {
         let src_libdir = builder.sysroot_libdir(build_compiler, host);
         for f in builder.read_dir(&src_libdir) {
             let filename = f.file_name().into_string().unwrap();
-            if is_dylib(&filename) && !proc_macros.contains(&filename) {
+            if (is_dylib(&filename) || is_debug_info(&filename)) && !proc_macros.contains(&filename)
+            {
                 builder.copy(&f.path(), &rustc_libdir.join(&filename));
             }
         }
@@ -1166,6 +1167,7 @@ pub fn run_cargo(
             if !(filename.ends_with(".rlib")
                 || filename.ends_with(".lib")
                 || filename.ends_with(".a")
+                || is_debug_info(&filename)
                 || is_dylib(&filename)
                 || (is_check && filename.ends_with(".rmeta")))
             {

src/bootstrap/util.rs

@@ -32,6 +32,12 @@ pub fn is_dylib(name: &str) -> bool {
     name.ends_with(".dylib") || name.ends_with(".so") || name.ends_with(".dll")
 }
 
+/// Returns `true` if the file name given looks like a debug info file
+pub fn is_debug_info(name: &str) -> bool {
+    // FIXME: consider split debug info on other platforms (e.g., Linux, macOS)
+    name.ends_with(".pdb")
+}
+
 /// Returns the corresponding relative library directory that the compiler's
 /// dylibs will be found in.
 pub fn libdir(target: TargetSelection) -> &'static str {