Fix some issues near recent chomp changes.

Reviewed-by: Richard Levitte <levitte@openssl.org>

util/files.pl

@@ -25,8 +25,8 @@ while (<>)
 				{
 				$b=$`; # Keep what is before the backslash
 				$o.=$b." ";
-				$b=<>;
-				$b =~ s|\R$||; # Better chomp
+				$b = "" unless defined($b = <>);
+				$b =~ s{\R$}{};
 				}
 			else
 				{
@@ -43,7 +43,7 @@ while (<>)
 		}
 	}
 
-$pwd=`pwd`; $pwd =~ s|\R$||;
+($pwd=`pwd`) =~ s{\R$}{};
 
 if ($sym{'TOP'} eq ".")
 	{

util/mk1mf.pl

@@ -553,8 +553,10 @@ if ($fips)
 			{
 			open (IN, "util/fipslib_path.txt") || fipslib_error();
 			$fipslibdir = <IN>;
-			$fipslibdir =~ s|\R$||;
 			close IN;
+			$fipslibdir = "" unless defined($fipslibdir);
+			$fipslibdir =~ s{\R$}{};
+			fipslib_error() if ($fipslibdir eq "");
 			}
 		fips_check_files($fipslibdir,
 				"fipscanister.lib", "fipscanister.lib.sha1",

util/mkfiles.pl

@@ -107,8 +107,8 @@ while (<IN>)
 				{
 				$b=$`;
 				$o.=$b." ";
-				$b=<IN>;
-				$b =~ s|\R$||;
+				$b = "" unless defined($b = <IN>);
+				$b =~ s{\R$}{};
 				}
 			else
 				{