iEnsures DLIB_FALLTHROUGH macro is only set for GCC>=7 (#1770)

f0e1d4e4 · virgile devaux · Davis E. King · f584e787 · f0e1d4e4
Commit f0e1d4e4 authored May 17, 2019 by virgile devaux Committed by Davis E. King May 16, 2019
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dlib/general_hash/murmur_hash3.h dlib/general_hash/murmur_hash3.h +1 -1

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--- a/dlib/general_hash/murmur_hash3.h
+++ b/dlib/general_hash/murmur_hash3.h
@@ -24,7 +24,7 @@ namespace dlib
    // Microsoft Visual Studio


-#if (defined(__GNUC__) || defined(__clang__))
+#if ((defined(__GNUC__) && __GNUC__ >= 7) || defined(__clang__))
 #define DLIB_FALLTHROUGH [[fallthrough]]
 #else
 #define DLIB_FALLTHROUGH