Fix undef warning when building w/ clang or gcc on Windows

5 years ago · 40f5b0b30f
parent 300dfcc5bf
commit 40f5b0b30f
1 changed files with 1 additions and 1 deletions
--- a/src/google/protobuf/stubs/port.h
+++ b/src/google/protobuf/stubs/port.h
@ -51,7 +51,7 @@
  #if !defined(PROTOBUF_DISABLE_LITTLE_ENDIAN_OPT_FOR_TEST)
    #define PROTOBUF_LITTLE_ENDIAN 1
  #endif
-  #if _MSC_VER >= 1300 && !defined(__INTEL_COMPILER)
+  #if defined(_MSC_VER) && _MSC_VER >= 1300 && !defined(__INTEL_COMPILER)
    // If MSVC has "/RTCc" set, it will complain about truncating casts at
    // runtime.  This file contains some intentional truncating casts.
    #pragma runtime_checks("c", off)