From 3a75032ba9bd31a4ebe843a63bcb38dea0f200c2 Mon Sep 17 00:00:00 2001
From: Christoffer Lerno <christoffer@aegik.com>
Date: Fri, 11 Jun 2021 18:39:48 +0200
Subject: [PATCH] Workaround for GCC warning.

---
 src/utils/common.h | 12 ++++++++++++
 src/utils/lib.h    | 10 +++++++++-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/utils/common.h b/src/utils/common.h
index d4d82d021..03d25ed65 100644
--- a/src/utils/common.h
+++ b/src/utils/common.h
@@ -32,4 +32,16 @@
 #define USE_PTHREAD 1
 #else
 #define USE_PTHREAD 0
+#endif
+
+#define IS_GCC 0
+#define IS_CLANG 0
+#ifdef __GNUC__
+#ifdef __clang__
+#undef IS_CLANG
+#define IS_CLANG 1
+#else
+#undef IS_GCC
+#define IS_GCC 1
+#endif
 #endif
\ No newline at end of file
diff --git a/src/utils/lib.h b/src/utils/lib.h
index 45f7a0d13..b8bd51e16 100644
--- a/src/utils/lib.h
+++ b/src/utils/lib.h
@@ -335,7 +335,15 @@ static inline void* expand_(void *vec, size_t element_size)
 	if (header->size == header->capacity)
 	{
 		VHeader_ *new_array = vec_new_(element_size, header->capacity << 1U);
-		memcpy(new_array, header, element_size * header->capacity + sizeof(VHeader_));
+#if IS_GCC
+		// I've yet to figure out why GCC insists that this is trying to copy
+		// 8 bytes over a size zero array.
+		// We use volatile to deoptimize on GCC
+		volatile size_t copy_size = element_size * header->capacity + sizeof(VHeader_);
+#else
+		size_t copy_size = element_size * header->capacity + sizeof(VHeader_);
+#endif
+		memcpy(new_array, header, copy_size);
 		header = new_array;
 		new_array->capacity = header->capacity << 1U;
 	}