use /Fe<file> for older cl.exe version (#9252)

Author: Elaheh Rashedi

Extension/src/LanguageServer/cppBuildTaskProvider.ts

@@ -169,7 +169,7 @@ export class CppBuildTaskProvider implements TaskProvider {
             const taskLabel: string = ((appendSourceToName && !compilerPathBase.startsWith(ext.configPrefix)) ?
                 ext.configPrefix : "") + compilerPathBase + " " + localize("build_active_file", "build active file");
             const programName: string = util.defaultExePath();
-            let args: string[] = isCl ? ['/Zi', '/EHsc', '/nologo', '/Fe:', programName, '${file}'] : ['-fdiagnostics-color=always', '-g', '${file}', '-o', programName];
+            let args: string[] = isCl ? ['/Zi', '/EHsc', '/nologo', `/Fe${programName}`, '${file}'] : ['-fdiagnostics-color=always', '-g', '${file}', '-o', programName];
             if (compilerArgs && compilerArgs.length > 0) {
                 args = args.concat(compilerArgs);
             }

Extension/src/common.ts

@@ -328,7 +328,11 @@ export function defaultExePath(): string {
 }
 
 export function findExePathInArgs(args: string[]): string | undefined {
-    return args.find((arg: string, index: number) => (arg.includes(".exe") || (index > 0 && args[index - 1] === "-o")));
+    const exePath: string | undefined = args.find((arg: string, index: number) => (arg.includes(".exe") || (index > 0 && args[index - 1] === "-o")));
+    if (exePath?.startsWith("/Fe")) {
+        return exePath.substring(3);
+    }
+    return exePath;
 }
 
 // Pass in 'arrayResults' if a string[] result is possible and a delimited string result is undesirable.