Tighten preprocessor check that avoids the "fallthrough" C compiler warnings.

Closes #1930.

Tighten preprocessor check that avoids the "fallthrough" C compiler warnings.
Closes #1930.
ed3da54e · Stefan Behnel · 5aad2f56 · ed3da54e
Commit ed3da54e authored Oct 14, 2017 by Stefan Behnel
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Cython/Utility/ModuleSetupCode.c Cython/Utility/ModuleSetupCode.c +1 -1

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--- a/Cython/Utility/ModuleSetupCode.c
+++ b/Cython/Utility/ModuleSetupCode.c
@@ -516,7 +516,7 @@
  #endif
  #ifndef CYTHON_FALLTHROUGH
-    #if !defined(_MSC_VER) && __has_attribute(fallthrough)
+    #if (defined(__GNUC__) || defined(__clang__)) && __has_attribute(fallthrough)
      #define CYTHON_FALLTHROUGH __attribute__((fallthrough))
    #else
      #define CYTHON_FALLTHROUGH