sync:Fix c++20 compilation problem for clang10 and fix potential bug due to compiler optimization

Signed-off-by: zhangzhangxin <zhangxin1@xfusion.com>

0005-sync-Fix-c-20-compilation-problem-for-clang10.patch

@@ -0,0 +1,33 @@
+From 98361556e6ad47f4edb1f3615341ba4b6f3ff552 Mon Sep 17 00:00:00 2001
+From: zhangzhangxin <zhangxin1@xfusion.com>
+Date: Fri, 12 May 2023 09:52:03 +0800
+Subject: [PATCH] sync:Fix c++20 compilation problem for clang10 and fix
+ potential bug due to compiler optimization
+
+Signed-off-by: zhangzhangxin <zhangxin1@xfusion.com>
+---
+ include/json/allocator.h | 7 +++----
+ 1 file changed, 3 insertions(+), 4 deletions(-)
+
+diff --git a/include/json/allocator.h b/include/json/allocator.h
+index 0f5c224..95ef8a5 100644
+--- a/include/json/allocator.h
++++ b/include/json/allocator.h
+@@ -35,11 +35,10 @@ public:
+    * Release memory which was allocated for N items at pointer P.
+    *
+    * The memory block is filled with zeroes before being released.
+-   * The pointer argument is tagged as "volatile" to prevent the
+-   * compiler optimizing out this critical step.
+    */
+-  void deallocate(volatile pointer p, size_type n) {
+-    std::memset(p, 0, n * sizeof(T));
++  void deallocate(pointer p, size_type n) {
++    // memset_s is used because memset may be optimized away by the compiler
++    memset_s(p, n * sizeof(T), 0, n * sizeof(T));
+     // free using "global operator delete"
+     ::operator delete(p);
+   }
+-- 
+2.40.0.windows.1
+

jsoncpp.spec

@@ -1,6 +1,6 @@
 Name:           jsoncpp
 Version:        1.9.3
-Release:        6
+Release:        7
 Summary:        JSON C++ library
 License:        Public Domain or MIT
 URL:            https://github.com/open-source-parsers/jsoncpp
@@ -10,6 +10,7 @@ Patch0:         0001-sync-Issue-1182-Fix-fuzzing-bug.patch
 Patch1:         0002-sync-avoid-isprint-because-it-is-locale-specific.patch
 Patch2:         0003-sync-Add-nullptr-Json-Value-constructor.patch
 Patch3:         0004-sync-Fix-generation-of-pkg-config-file-with-absolute.patch 
+Patch4:         0005-sync-Fix-c-20-compilation-problem-for-clang10.patch
 
 %description
 JsonCpp is a C++ library that allows manipulating JSON values,
@@ -91,6 +92,9 @@ hardlink -cfv %{buildroot}%{_docdir}/%{name}
 
 
 %changelog
+* Fri May 12 2023 zhangxin <zhangxin1@xfusion.com> - 1.9.3-7
+- Fix c++20 compilation problem for clang10 and fix potential bug due to compiler optimization
+
 * Fri Apr 28 2023 zhangxin <zhangxin1@xfusion.com> - 1.9.3-6
 - Fix generation of pkg-config file with absolute includedir/libdir.