[SYCL] Fix unresolved reference for ExeModuleHandle.

Signed-off-by: Yu <jennifer.yu@intel.com>

Author: jyu2-git

sycl/include/CL/sycl/detail/os_util.hpp

@@ -11,6 +11,7 @@
 #pragma once
 
 #include <stdlib.h>
+#include <cstdint>
 
 #ifdef _WIN32
 #define SYCL_RT_OS_WINDOWS
@@ -53,7 +54,7 @@ namespace detail {
 
 /// Uniquely identifies an operating system module (executable or a dynamic
 /// library)
-using OSModuleHandle = void *;
+using OSModuleHandle = intptr_t;
 
 /// Groups the OS-dependent services.
 class OSUtil {
@@ -63,7 +64,7 @@ class OSUtil {
 
   /// Module handle for the executable module - it is assumed there is always
   /// single one at most.
-  static const OSModuleHandle ExeModuleHandle;
+  static constexpr OSModuleHandle ExeModuleHandle = -1;
 
   /// Returns the amount of RAM available for the operating system.
   static size_t getOSMemSize();

sycl/source/detail/os_util.cpp

@@ -29,9 +29,6 @@ namespace cl {
 namespace sycl {
 namespace detail {
 
-const OSModuleHandle OSUtil::ExeModuleHandle =
-    reinterpret_cast<OSModuleHandle>(-1);
-
 #if defined(SYCL_RT_OS_LINUX)
 
 struct ModuleInfo {
@@ -54,7 +51,7 @@ static int callback(struct dl_phdr_info *Info, size_t Size, void *Data) {
       // ... it is - belongs to the module then
       // dlpi_addr is zero for the executable, replace it
       auto H = reinterpret_cast<void *>(Info->dlpi_addr);
-      MI->Handle = H ? H : OSUtil::ExeModuleHandle;
+      MI->Handle = H ? H : reinterpret_cast<void *>(OSUtil::ExeModuleHandle);
       MI->Name = Info->dlpi_name;
       return 1; // non-zero tells to finish iteration via modules
     }
@@ -78,7 +75,7 @@ OSModuleHandle OSUtil::getOSModuleHandle(const void *VirtAddr) {
   if (!GetModuleHandleExA(Flag, LpModuleAddr, &PhModule)) {
      // Expect the caller to check for zero and take
      // necessary action
-     return reinterpret_cast<OSModuleHandle>(0);
+     return 0;
   }
   return reinterpret_cast<OSModuleHandle>(PhModule);
 }