diff --git a/config/auto/llvm.pm b/config/auto/llvm.pm
index e1450e5..f47b972 100644
--- a/config/auto/llvm.pm
+++ b/config/auto/llvm.pm
@@ -50,13 +50,6 @@ sub runstep {
     my $rv = $self->version_check($conf, \@output, $verbose);
     return 1 unless $rv;
 
-    #  Find cc flags
-    my $ccflags = `$llvm_config --cflags`;
-    chomp $ccflags;
-    # do not include optimization level
-    $ccflags =~ s/-O[^ ]*//;
-    $conf->data->add( ' ', ccflags => $ccflags );
-
     # Find lib
     my $ldd = `ldd "$llvm_bindir/lli"`;
     if ($ldd =~ /(libLLVM[^ ]+)(.*)/m){