--- 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.