Separate logic

third_party/jitterentropy/src/jitterentropy-internal.h

@@ -51,7 +51,9 @@ extern "C" {
 /* Portable switch fall-through to silence warnings. Only works for C. */
 #if defined(__GNUC__) && __GNUC__ >= 7 // gcc 7
 #define JE_FALLTHROUGH __attribute__ ((fallthrough))
-#elif defined(__clang__) && __has_attribute(fallthrough) && __clang_major__ >= 5
+#elif defined(__clang__)
+/* Separate logic to avoid errors when compiler doesn't understand __has_attribute */
+#if __has_attribute(fallthrough) && __clang_major__ >= 5
 /*
  * Clang 3.5, at least, complains about "error: declaration does not declare
  * anything", possibly because we put a semicolon after this macro in
@@ -61,6 +63,9 @@ extern "C" {
 #else
 #define JE_FALLTHROUGH
 #endif
+#else
+#define JE_FALLTHROUGH
+#endif
 
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))