Fix(kclvm-windows): rm '\\?\' in windows path. (#410)

* Fix(kclvm-windows): rm '\\?\' in windows path.
issue #379.

* add test case

* fix test case

* fix test case

build_and_test_win.bat

@@ -1,4 +1,3 @@
-@echo off
 cd %~dp0
 
 call .\\scripts\\build-windows\\build.bat

kclvm/runner/src/command.rs

@@ -1,6 +1,7 @@
 #![allow(dead_code)]
 use std::env::consts::DLL_SUFFIX;
 use std::ffi::CString;
+use std::path::Path;
 use std::path::PathBuf;
 
 #[derive(Debug)]
@@ -103,6 +104,12 @@ impl Command {
             .host(&target)
             .flag("-o")
             .flag(&lib_path);
+
+        let libs: Vec<String> = libs
+            .into_iter()
+            .map(|lib| adjust_canonicalization(lib))
+            .collect();
+        let libs = libs.as_slice();
         build.files(libs);
 
         // Run command with cc.
@@ -224,3 +231,38 @@ impl Command {
         })
     }
 }
+
+#[cfg(not(target_os = "windows"))]
+fn adjust_canonicalization<P: AsRef<Path>>(p: P) -> String {
+    p.as_ref().display().to_string()
+}
+
+#[cfg(target_os = "windows")]
+/// On windows, the "\\?\ ", for the Windows APIs, will cause the obj file to not be found when linking by "cl.exe".
+/// Slicing this path directly is not a good solution,
+/// we will find a more fluent way to solve this problem in the future. @zongz
+/// Note: On windows systems, a file path that is too long may cause "cl.exe" to crash.
+fn adjust_canonicalization<P: AsRef<Path>>(p: P) -> String {
+    const VERBATIM_PREFIX: &str = r#"\\?\"#;
+    let p = p.as_ref().display().to_string();
+    if p.starts_with(VERBATIM_PREFIX) {
+        p[VERBATIM_PREFIX.len()..].to_string()
+    } else {
+        p
+    }
+}
+
+#[test]
+#[cfg(target_os = "windows")]
+fn test_adjust_canonicalization() {
+    let path = Path::new(".").canonicalize().unwrap().display().to_string();
+    assert!(path.contains("\\\\?\\"));
+    assert!(!adjust_canonicalization(path).contains("\\\\?\\"));
+}
+
+#[test]
+#[cfg(not(target_os = "windows"))]
+fn test_adjust_canonicalization1() {
+    let path = Path::new(".").canonicalize().unwrap().display().to_string();
+    assert_eq!(adjust_canonicalization(path.to_string()), path);
+}

scripts/build-windows/clean.bat

@@ -5,5 +5,9 @@ setlocal
 cd %~dp0
 
 rmdir _output
+del /s *.obj
+del /s *.exp
+del /s *.lib
+del /s *.dll
 
 del *.zip