From 308af391368b2b1ef6b1e5fc9d2a959336527f0c Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Mon, 26 Apr 2021 17:07:41 +0200
Subject: [PATCH] COMP: sign check to avoid warnings about new[] range

---
 src/OpenFOAM/containers/Lists/List/List.C  | 1 +
 src/OpenFOAM/containers/Lists/List/ListI.H | 3 ++-
 src/OpenFOAM/matrices/Matrix/MatrixI.H     | 3 ++-
 wmake/rules/linux64Mingw/c++               | 2 +-
 4 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/OpenFOAM/containers/Lists/List/List.C b/src/OpenFOAM/containers/Lists/List/List.C
index 302529f81f..68f0c6440b 100644
--- a/src/OpenFOAM/containers/Lists/List/List.C
+++ b/src/OpenFOAM/containers/Lists/List/List.C
@@ -50,6 +50,7 @@ void Foam::List<T>::doResize(const label newSize)
     {
         if (newSize > 0)
         {
+            // With sign-check to avoid spurious -Walloc-size-larger-than
             T* nv = new T[newSize];
 
             const label overlap = min(this->size_, newSize);
diff --git a/src/OpenFOAM/containers/Lists/List/ListI.H b/src/OpenFOAM/containers/Lists/List/ListI.H
index a7b0aca30c..650afea8c1 100644
--- a/src/OpenFOAM/containers/Lists/List/ListI.H
+++ b/src/OpenFOAM/containers/Lists/List/ListI.H
@@ -31,8 +31,9 @@ License
 template<class T>
 inline void Foam::List<T>::doAlloc()
 {
-    if (this->size_)
+    if (this->size_ > 0)
     {
+        // With sign-check to avoid spurious -Walloc-size-larger-than
         this->v_ = new T[this->size_];
     }
 }
diff --git a/src/OpenFOAM/matrices/Matrix/MatrixI.H b/src/OpenFOAM/matrices/Matrix/MatrixI.H
index 6d96f4c0e4..2dc069a6f5 100644
--- a/src/OpenFOAM/matrices/Matrix/MatrixI.H
+++ b/src/OpenFOAM/matrices/Matrix/MatrixI.H
@@ -35,8 +35,9 @@ inline void Foam::Matrix<Form, Type>::doAlloc()
 {
     const label len = size();
 
-    if (len)
+    if (len > 0)
     {
+        // With sign-check to avoid spurious -Walloc-size-larger-than
         v_ = new Type[len];
     }
 }
diff --git a/wmake/rules/linux64Mingw/c++ b/wmake/rules/linux64Mingw/c++
index aebb7a8831..4aad393721 100644
--- a/wmake/rules/linux64Mingw/c++
+++ b/wmake/rules/linux64Mingw/c++
@@ -9,7 +9,7 @@ include $(RULES)/c++$(WM_COMPILE_OPTION)
 
 c++FLAGS    = $(c++ARCH) $(GFLAGS) $(c++WARN) $(c++OPT) $(c++DBUG) $(ptFLAGS) $(LIB_HEADER_DIRS)
 
-Ctoo        = $(WM_SCHEDULER) $(CC) $(c++FLAGS) -Wno-alloc-size-larger-than -c $< -o $@
+Ctoo        = $(WM_SCHEDULER) $(CC) $(c++FLAGS) -c $< -o $@
 cxxtoo      = $(Ctoo)
 cctoo       = $(Ctoo)
 cpptoo      = $(Ctoo)