Fix wasm32 host filename generation

Cargo.lock

@@ -3315,7 +3315,6 @@ name = "roc_build"
 version = "0.0.1"
 dependencies = [
  "bumpalo",
- "const_format",
  "inkwell",
  "libloading",
  "roc_builtins",

crates/cli/src/build.rs

@@ -354,7 +354,7 @@ pub fn build_file<'a>(
                 problems
             } else {
                 todo!(
-                    "gracefully handle `ld` returning exit code {:?}",
+                    "gracefully handle `ld` (or `zig` in the case of wasm with --optimize) returning exit code {:?}",
                     exit_status.code()
                 );
             }

crates/compiler/build/Cargo.toml

@@ -31,7 +31,6 @@ roc_utils = { path = "../../utils" }
 
 wasi_libc_sys = { path = "../../wasi-libc-sys" }
 
-const_format.workspace = true
 bumpalo.workspace = true
 libloading.workspace = true
 tempfile.workspace = true

crates/compiler/build/src/link.rs

@@ -1,5 +1,4 @@
 use crate::target::{arch_str, target_zig_str};
-use const_format::concatcp;
 use libloading::{Error, Library};
 use roc_builtins::bitcode;
 use roc_error_macros::internal_error;
@@ -61,17 +60,8 @@ pub fn link(
 }
 
 pub fn host_filename(target: &Triple, opt_level: OptLevel) -> Option<&'static str> {
-    match target {
-        Triple {
-            architecture: Architecture::Wasm32,
-            ..
-        } => {
-            use roc_target::OperatingSystem::*;
-
-            const WITHOUT_EXTENSION: &str = "wasm32";
-
-            let file_name = match roc_target::OperatingSystem::from(target.operating_system) {
-                Wasi => {
+    match roc_target::OperatingSystem::from(target.operating_system) {
+        roc_target::OperatingSystem::Wasi => {
             // TODO wasm host extension should be something else ideally
             // .bc does not seem to work because
             //
@@ -79,17 +69,12 @@ pub fn host_filename(target: &Triple, opt_level: OptLevel) -> Option<&'static st
             //
             // and zig does not currently emit `.a` webassembly static libraries
             if matches!(opt_level, OptLevel::Development) {
-                        concatcp!(WITHOUT_EXTENSION, ".wasm")
+                Some("wasm32.wasm")
             } else {
-                        concatcp!(WITHOUT_EXTENSION, ".zig")
+                Some("wasm32.zig")
             }
         }
-                Unix => concatcp!(WITHOUT_EXTENSION, ".o"),
-                Windows => concatcp!(WITHOUT_EXTENSION, ".obj"),
-            };
-
-            Some(file_name)
-        }
+        _ => match target {
             Triple {
                 operating_system: OperatingSystem::Linux,
                 architecture: Architecture::X86_64,
@@ -126,6 +111,7 @@ pub fn host_filename(target: &Triple, opt_level: OptLevel) -> Option<&'static st
                 ..
             } => Some("windows-arm64.obj"),
             _ => None,
+        },
     }
 }