remove CMakeCache before building (#24860)

So it doesn't cache flags that are passed to the build

Author: pfgithub

build.zig

@@ -607,7 +607,7 @@ fn configureObj(b: *Build, opts: *BunBuildOptions, obj: *Compile) void {
             obj.llvm_codegen_threads = opts.llvm_codegen_threads orelse 0;
     }
 
-    obj.no_link_obj = opts.os != .windows;
+    obj.no_link_obj = opts.os != .windows and !opts.no_llvm;
 
 
     if (opts.enable_asan and !enableFastBuild(b)) {

scripts/build.mjs

@@ -87,6 +87,9 @@ async function build(args) {
     flag.startsWith("-D") ? [`${flag}=${value}`] : [flag, value],
   );
 
+  try {
+    await Bun.file(buildPath + "/CMakeCache.txt").delete();
+  } catch (e) {}
   await startGroup("CMake Configure", () => spawn("cmake", generateArgs, { env }));
 
   const envPath = resolve(buildPath, ".env");