Fixed compilation issue with GoogleTest on GCC 11.1.

It was added patch from google/googletest#3024 to silence error=maybe-uninitialized warning.

deps/deps-unix-common.cmake

@@ -34,6 +34,7 @@ ExternalProject_Add(dep_gtest
     EXCLUDE_FROM_ALL 1
     URL "https://github.com/google/googletest/archive/release-1.8.1.tar.gz"
     URL_HASH SHA256=9bf1fe5182a604b4135edc1a425ae356c9ad15e9b23f9f12a02e80184c3a249c
+    PATCH_COMMAND   patch -p1 -i ${CMAKE_CURRENT_LIST_DIR}/gtest/0001-Fix-warning-maybe-uninitialized.patch
     CMAKE_ARGS -DBUILD_GMOCK=OFF ${DEP_CMAKE_OPTS} -DCMAKE_INSTALL_PREFIX=${DESTDIR}/usr/local
 )
 

deps/gtest/0001-Fix-warning-maybe-uninitialized.patch

@@ -0,0 +1,31 @@
+From 4679637f1c9d5a0728bdc347a531737fad0b1ca3 Mon Sep 17 00:00:00 2001
+From: tbarbier <thomas.barbier@amadeus.com>
+Date: Thu, 24 Sep 2020 16:51:06 +0200
+Subject: [PATCH] Fix warning maybe-uninitialized
+
+---
+ googletest/src/gtest-death-test.cc | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/googletest/src/gtest-death-test.cc b/googletest/src/gtest-death-test.cc
+index 31de7d627e..0764f2eb43 100644
+--- a/googletest/src/gtest-death-test.cc
++++ b/googletest/src/gtest-death-test.cc
+@@ -1281,7 +1281,7 @@ static void StackLowerThanAddress(const void* ptr,
+ GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
+ GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
+ static void StackLowerThanAddress(const void* ptr, bool* result) {
+-  int dummy;
++  int dummy = 0;
+   *result = (&dummy < ptr);
+ }
+
+@@ -1289,7 +1289,7 @@ static void StackLowerThanAddress(const void* ptr, bool* result) {
+ GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
+ GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
+ static bool StackGrowsDown() {
+-  int dummy;
++  int dummy = 0;
+   bool result;
+   StackLowerThanAddress(&dummy, &result);
+   return result;