diff --git a/gas-preprocessor.pl b/gas-preprocessor.pl
index 066db33..a09cb68 100755
--- a/gas-preprocessor.pl
+++ b/gas-preprocessor.pl
@@ -163,6 +163,8 @@ ()
     @preprocess_c_cmd = grep ! /^-EHsc$/, @preprocess_c_cmd;
     @preprocess_c_cmd = grep ! /^-O/, @preprocess_c_cmd;
     @preprocess_c_cmd = grep ! /^-oldit/, @preprocess_c_cmd;
+    @preprocess_c_cmd = grep ! /^-FS/, @preprocess_c_cmd;
+    @preprocess_c_cmd = grep ! /^-w/, @preprocess_c_cmd;
 
     @gcc_cmd = grep ! /^-G/, @gcc_cmd;
     @gcc_cmd = grep ! /^-W/, @gcc_cmd;
@@ -170,6 +172,8 @@ ()
     @gcc_cmd = grep ! /^-fp/, @gcc_cmd;
     @gcc_cmd = grep ! /^-EHsc$/, @gcc_cmd;
     @gcc_cmd = grep ! /^-O/, @gcc_cmd;
+    @gcc_cmd = grep ! /^-FS/, @gcc_cmd;
+    @gcc_cmd = grep ! /^-w/, @gcc_cmd;
 
     my @outfiles = grep /\.(o|obj)$/, @gcc_cmd;
     $tempfile = $outfiles[0].".asm";