Rollup merge of rust-lang#102215 - alexcrichton:wasm-link-whole-archi…

…ve, r=estebank

Implement the `+whole-archive` modifier for `wasm-ld`

This implements the `Linker::{link_whole_staticlib,link_whole_rlib}` methods for the `WasmLd` linker used on wasm targets. Previously these methods were noops since I think historically `wasm-ld` did not have support for `--whole-archive` but nowadays it does, so the flags are passed through.

compiler/rustc_codegen_ssa/src/back/linker.rs

@@ -1260,11 +1260,11 @@ impl<'a> Linker for WasmLd<'a> {
     }
 
     fn link_whole_staticlib(&mut self, lib: &str, _verbatim: bool, _search_path: &[PathBuf]) {
-        self.cmd.arg("-l").arg(lib);
+        self.cmd.arg("--whole-archive").arg("-l").arg(lib).arg("--no-whole-archive");
     }
 
     fn link_whole_rlib(&mut self, lib: &Path) {
-        self.cmd.arg(lib);
+        self.cmd.arg("--whole-archive").arg(lib).arg("--no-whole-archive");
     }
 
     fn gc_sections(&mut self, _keep_metadata: bool) {