Fixed int to char warning.

5cced076 · Anton Danielsson · 0a8e0dbb · 5cced076
Commit 5cced076 authored Oct 05, 2015 by Anton Danielsson
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commandlineflags.cc src/commandlineflags.cc +1 -1

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--- a/src/commandlineflags.cc
+++ b/src/commandlineflags.cc
@@ -92,7 +92,7 @@ static std::string FlagToEnvVar(const char* flag) {
  std::string env_var;
  for (size_t i = 0; i != flag_str.length(); ++i)
-    env_var += ::toupper(flag_str.c_str()[i]);
+    env_var += static_cast<char>(::toupper(flag_str.c_str()[i]));
  return "BENCHMARK_" + env_var;
 }