Fix alloca support on Clang on Windows

include/NazaraUtils/MemoryHelper.hpp

@@ -7,24 +7,28 @@
 #ifndef NAZARAUTILS_MEMORYHELPER_HPP
 #define NAZARAUTILS_MEMORYHELPER_HPP
 
-#if defined(NAZARA_COMPILER_MSVC) || defined(NAZARA_COMPILER_MINGW)
+#include <NazaraUtils/Prerequisites.hpp>
+
+#if defined(NAZARA_COMPILER_MSVC)
 
 #include <malloc.h>
 
-// with MSVC, using alloca with a size of zero returns a valid pointer
+// https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/alloca?view=msvc-170
 #define NAZARA_ALLOCA(size) _alloca(size)
 #define NAZARA_ALLOCA_SUPPORT
 
-#elif defined(NAZARA_COMPILER_CLANG) || defined(NAZARA_COMPILER_GCC) || defined(NAZARA_COMPILER_INTEL)
+#elif defined(NAZARA_COMPILER_CLANG) || defined(NAZARA_COMPILER_GCC)
 
-#ifdef NAZARA_PLATFORM_BSD
-	#include <stdlib.h>
-#else
-	#include <alloca.h>
-#endif
+// https://clang.llvm.org/docs/LanguageExtensions.html
+// https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html
+#define NAZARA_ALLOCA(size) __builtin_alloca(((size) > 0) ? (size) : 1)
+#define NAZARA_ALLOCA_SUPPORT
+
+#elif defined(NAZARA_COMPILER_INTEL)
 
-// with Clang/GCC, using alloca with a size of zero does nothing good
-#define NAZARA_ALLOCA(size) alloca(((size) > 0) ? (size) : 1)
+// https://www.intel.com/content/www/us/en/docs/cpp-compiler/developer-guide-reference/2021-10/miscellaneous-intrinsics-001.html
+// same as MSVC but without the malloc.h include (not sure)
+#define NAZARA_ALLOCA(size) _alloca(((size) > 0) ? (size) : 1)
 #define NAZARA_ALLOCA_SUPPORT
 
 #endif