From f41b92134a276716b7e2d7ef54996b30f36a10a9 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Mon, 5 Feb 2018 19:51:09 -0500
Subject: [PATCH] Fix fallthrough compiler warning with gcc >= 7

Fixes https://github.com/harfbuzz/harfbuzz/issues/755
---
 src/hb-private.hh | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/hb-private.hh b/src/hb-private.hh
index eba797cfc..53ed11c81 100644
--- a/src/hb-private.hh
+++ b/src/hb-private.hh
@@ -154,6 +154,9 @@ extern "C" void  hb_free_impl(void *ptr);
 #if defined(__clang__) && __cplusplus >= 201103L
    /* clang's fallthrough annotations are only available starting in C++11. */
 #  define HB_FALLTHROUGH [[clang::fallthrough]]
+#elif __GNUC__ >= 7
+   /* GNU fallthrough attribute is available from GCC7 */
+#  define HB_FALLTHROUGH __attribute__((fallthrough))
 #elif defined(_MSC_VER)
    /*
     * MSVC's __fallthrough annotations are checked by /analyze (Code Analysis):