Add an override (DONTSTRIP) so that one can easily install debugable

binaries when one cannot easily edit a package's Makefiles and/or
configure scripts.

usr.bin/xinstall/install.1

@@ -189,6 +189,15 @@ environment variable and if present,
 uses the assigned value as the program to run if and when the
 .Fl s
 option has been specified.
+.Pp
+If the
+.Ev DONTSTRIP
+environment variable is present
+.Nm
+will ignore any specification of the
+.Fl s
+option.
+This is mainly for use in debugging The FreeBSD Ports Collection.
 .Sh FILES
 .Bl -tag -width INS@XXXX -compact
 .It Pa INS@XXXX

usr.bin/xinstall/xinstall.c

@@ -174,6 +174,11 @@ main(int argc, char *argv[])
 		usage();
 	}
 
+	if (getenv("DONTSTRIP") != NULL) {
+		warnx("DONTSTRIP set - will not strip installed binaries");
+		dostrip = 0;
+	}
+
 	/* must have at least two arguments, except when creating directories */
 	if (argc == 0 || (argc == 1 && !dodir))
 		usage();