--- a/Tools/Scripts/webkitdirs.pm
+++ b/Tools/Scripts/webkitdirs.pm
@@ -2064,9 +2064,6 @@ sub generateBuildSystemFromCMakeProject
     # Compiler options to keep floating point values consistent
     # between 32-bit and 64-bit architectures.
     determineArchitecture();
-    if ($architecture ne "x86_64" && !isARM() && !isCrossCompilation() && !isAnyWindows()) {
-        $ENV{'CXXFLAGS'} = "-march=pentium4 -msse2 -mfpmath=sse " . ($ENV{'CXXFLAGS'} || "");
-    }
 
     # We call system("cmake @args") instead of system("cmake", @args) so that @args is
     # parsed for shell metacharacters.