Fix some more warnings

Co-authored-by: prj- <[email protected]>
Agent-Logs-Url: https://github.com/FreeFem/FreeFem-sources/sessions/b9e0b6e5-f1ac-4c81-9810-513c2c935731

Author: Copilot

plugin/mpi/PETSc-code.hpp

@@ -1,5 +1,10 @@
 #include <petsc.h>
 
+#if defined(__clang__)
+  #pragma clang diagnostic push
+  #pragma clang diagnostic ignored "-Wunused-value"
+#endif
+
 #include "PETSc.hpp"
 #include "compositeFESpace.hpp"
 
@@ -6906,3 +6911,7 @@ static void Init_PETSc( ) {
 #ifndef PETScandSLEPc
 LOADFUNC(Init_PETSc)
 #endif
+
+#if defined(__clang__)
+  #pragma clang diagnostic pop
+#endif

plugin/mpi/SLEPc-code.hpp

@@ -9,7 +9,12 @@
 
 #ifdef WITH_SLEPC
 
-#include "slepc.h"
+#include <slepc.h>
+
+#if defined(__clang__)
+  #pragma clang diagnostic push
+  #pragma clang diagnostic ignored "-Wunused-value"
+#endif
 
 namespace SLEPc {
 template<class Type, class K>
@@ -671,3 +676,7 @@ static void Init() {
      Init_PETSc();
 }
 #endif
+
+#if defined(__clang__)
+  #pragma clang diagnostic pop
+#endif

src/fflib/AFunction.hpp

@@ -812,7 +812,7 @@ template<class A>
 template<class A> AnyType Initialize(Stack,const AnyType &x){
   A * a=PGetAny<A>(x);
   A *b=new A;// 
-  memcpy(a,b,sizeof(A));// bitcopy
+  memcpy((void*)a,b,sizeof(A));// bitcopy
   ::operator delete(b); // delete with no destruction 
   return  SetPtrAny(a);
 }

src/fflib/Operator.hpp

@@ -201,7 +201,7 @@ struct Op2_padd {
   using second_argument_type = B;
   using result_type          = R*;
   static R * f(Stack s,const A & a,const B & b)  { 
-   R* r= Add2StackOfPtr2Free(s, a || b ? new R ((a ? *a : nullptr) + (b ? *b : nullptr)) : nullptr);
+   R* r= Add2StackOfPtr2Free(s, a || b ? new R ((a ? *a : R()) + (b ? *b : R())) : nullptr);
   // delete a,delete b;
   return r;} };