From e8f6f69bff6bf8bd672e4a1ed56bb42098d39a29 Mon Sep 17 00:00:00 2001
From: Folkert <folkert@folkertdev.nl>
Date: Tue, 30 Aug 2022 14:16:20 +0200
Subject: [PATCH] make filenames cross-platform

---
 crates/compiler/build/src/link.rs | 30 ++++++++++++++++++++++--------
 1 file changed, 22 insertions(+), 8 deletions(-)

diff --git a/crates/compiler/build/src/link.rs b/crates/compiler/build/src/link.rs
index fce8ece2f0..536b655a69 100644
--- a/crates/compiler/build/src/link.rs
+++ b/crates/compiler/build/src/link.rs
@@ -482,15 +482,29 @@ pub fn rebuild_host(
             host_input_path.with_file_name("host.bc")
         }
     } else {
-        host_input_path.with_file_name(if shared_lib_path.is_some() {
-            "dynhost"
+        let os = roc_target::OperatingSystem::from(target.operating_system);
+
+        if shared_lib_path.is_some() {
+            let extension = match os {
+                roc_target::OperatingSystem::Windows => "exe",
+                roc_target::OperatingSystem::Unix => "",
+                roc_target::OperatingSystem::Wasi => "",
+            };
+
+            host_input_path
+                .with_file_name("dynhost")
+                .with_extension(extension)
         } else {
-            match roc_target::OperatingSystem::from(target.operating_system) {
-                roc_target::OperatingSystem::Windows => "host.obj",
-                roc_target::OperatingSystem::Unix => "host.o",
-                roc_target::OperatingSystem::Wasi => "host.o",
-            }
-        })
+            let extension = match os {
+                roc_target::OperatingSystem::Windows => "obj",
+                roc_target::OperatingSystem::Unix => "o",
+                roc_target::OperatingSystem::Wasi => "o",
+            };
+
+            host_input_path
+                .with_file_name("host")
+                .with_extension(extension)
+        }
     };
 
     let env_path = env::var("PATH").unwrap_or_else(|_| "".to_string());