Define intptr and uintptr in a more generic way

src/common/dwarf/types.h

Index: src/common/dwarf/types.h
diff --git a/src/common/dwarf/types.h b/src/common/dwarf/types.h
index 61ca4579a9b3846021c13a5df0383c9d4ecdf314..59dda3160085a75d33e0c91813b81f1c55366e02 100644
--- a/src/common/dwarf/types.h
+++ b/src/common/dwarf/types.h
@@ -45,11 +45,7 @@ typedef unsigned short     uint16;
 typedef unsigned int       uint32;
 typedef unsigned long long uint64;
 
-#ifdef __PTRDIFF_TYPE__
-typedef          __PTRDIFF_TYPE__ intptr;
-typedef unsigned __PTRDIFF_TYPE__ uintptr;
-#else
-#error "Can't find pointer-sized integral types."
-#endif
+typedef intptr_t           intptr;
+typedef uintptr_t          uintptr;
 
 #endif // _COMMON_DWARF_TYPES_H__