From 2933e1a01a6f49b60b4b9a2c7bd1439cbadc982a Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Tue, 13 Nov 2018 14:13:09 +0200
Subject: Fix bizarre "maybe used uninitialized" GCC warnings in optional usage

The warning was only issued in certain cases when sizeof(T) was 1 byte
(bool, uint8_t).
---
 libbutl/optional.mxx | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'libbutl/optional.mxx')

diff --git a/libbutl/optional.mxx b/libbutl/optional.mxx
index e7e00dd..0f18c11 100644
--- a/libbutl/optional.mxx
+++ b/libbutl/optional.mxx
@@ -43,7 +43,7 @@ LIBBUTL_MODEXPORT namespace butl
     template <typename T>
     struct optional_data<T, false>
     {
-      struct empty {};
+      struct empty {char x;}; // Note: byte size is important to GCC.
 
       union
       {
@@ -86,7 +86,7 @@ LIBBUTL_MODEXPORT namespace butl
     template <typename T>
     struct optional_data<T, true>
     {
-      struct empty {};
+      struct empty {char x;}; // Note: byte size is important to GCC.
 
       union
       {
-- 
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