From f7fabd8ba3748f9cefa814a5c084630027d3963a Mon Sep 17 00:00:00 2001
From: Denis Blank <denis.blank@outlook.com>
Date: Wed, 4 Oct 2017 00:10:08 +0200
Subject: [PATCH] Attempt to fix the GCC travis build

---
 include/continuable/detail/util.hpp | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/include/continuable/detail/util.hpp b/include/continuable/detail/util.hpp
index 7754630..00acc2b 100644
--- a/include/continuable/detail/util.hpp
+++ b/include/continuable/detail/util.hpp
@@ -238,9 +238,11 @@ private:
 
 /// Hint for the compiler that this point should be unreachable
 [[noreturn]] inline void unreachable() {
-#ifdef _MSC_VER
+#if defined(_MSC_VER)
   __assume(false);
-#elif __has_builtin(__builtin_unreachable)
+#elif defined(__GNUC__)
+  __builtin_unreachable();
+#elif defined(__has_builtin) && __has_builtin(__builtin_unreachable)
   __builtin_unreachable();
 #endif
 }
@@ -248,9 +250,11 @@ private:
 /// Causes the application to exit abnormally because we are
 /// in an invalid state.
 [[noreturn]] inline void trap() {
-#ifdef _MSC_VER
+#if defined(_MSC_VER)
   __debugbreak();
-#elif __has_builtin(__builtin_trap)
+#elif defined(__GNUC__)
+  __builtin_trap();
+#elif defined(__has_builtin) && __has_builtin(__builtin_trap)
   __builtin_trap();
 #else
   *(volatile int*)0 = 0;