cli: Fix invalid option message.

[apitrace] / cli / cli_dump_images.cpp

diff --git a/cli/cli_dump_images.cpp b/cli/cli_dump_images.cpp
index 34e4d05d130dcb5162ab0adcc793f77c73710d56..bf3dc566768f012b82b68a721d0a9477679ec617 100644 (file)
--- a/cli/cli_dump_images.cpp
+++ b/cli/cli_dump_images.cpp
@@ -29,6 +29,8 @@
 #include <string.h>
 #include <limits.h> // for CHAR_MAX
 #include <getopt.h>
+
+#include <string>
 #include <iostream>
 
 #include "os_string.hpp"
@@ -91,13 +93,14 @@ command(int argc, char *argv[])
             calls = optarg;
             break;
         case CALL_NOS_OPT:
-            call_nos = std::string("--call-nos=") + optarg;
+            call_nos = "--call-nos=";
+            call_nos.append(optarg);
             break;
         case 'o':
             output = optarg;
             break;
         default:
-            std::cerr << "error: unexpected option `" << opt << "`\n";
+            std::cerr << "error: unexpected option `" << (char)opt << "`\n";
             usage();
             return 1;
         }