compiler: raise FD limit before opening link inputs

src/main.zig

@@ -977,6 +977,11 @@ fn buildOutputType(
     var cc_argv: std.ArrayList([]const u8) = .empty;
     var deps: std.ArrayList(CliModule.Dep) = .empty;
 
+    // We need to raise the FD limit *before* CLI parsing, because we open link inputs during CLI
+    // parsing (in `createModule`), so a large number of link inputs could push us past the limit on
+    // targets with a low soft limit (e.g. macOS has a default limit of 256).
+    process.raiseFileDescriptorLimit();
+
     // Contains every module specified via -M. The dependencies are added
     // after argument parsing is completed. We use a StringArrayHashMap to make
     // error output consistent. "root" is special.
@@ -3534,8 +3539,6 @@ fn buildOutputType(
         break :b .whole;
     };
 
-    process.raiseFileDescriptorLimit();
-
     var file_system_inputs: std.ArrayList(u8) = .empty;
     defer file_system_inputs.deinit(gpa);