$cversion=`$cc -V |head -1` if $cversion =~ "Error";
$cversion=`$cc --version` if $cversion eq "";
$cversion =~ s/Reading specs.*\n//;
$cversion=`$cc -V |head -1` if $cversion =~ "Error";
$cversion=`$cc --version` if $cversion eq "";
$cversion =~ s/Reading specs.*\n//;