Minor cleanups.

src/Makefile

@@ -117,7 +117,7 @@ endif
 mostlyclean clean distclean maintainer-clean:
 	rm -f *.d *.map *.o *.obj *.res ./.depend upx.exe upx.out upx.ttp upx$(exeext)
 
-./.depend compress_lzma$(objext) : override INCLUDES += -I$(UPX_LZMADIR)
+./.depend compress_lzma$(objext) : INCLUDES += -I$(UPX_LZMADIR)
 
 compress_lzma$(objext) : CXXFLAGS += -Wno-shadow
 p_mach$(objext)        : CXXFLAGS += -Wno-cast-align

src/mem.cpp

@@ -76,11 +76,11 @@ bool mem_size_valid_bytes(upx_uint64_t bytes)
 }
 
 
-int ptr_diff(const char *p1, const char *p2)
+int ptr_diff(const void *p1, const void *p2)
 {
     assert(p1 != NULL);
     assert(p2 != NULL);
-    ptrdiff_t d = p1 - p2;
+    ptrdiff_t d = (const char *)p1 - (const char *)p2;
     if (p1 >= p2)
         assert(mem_size_valid_bytes(d));
     else

src/util.h

@@ -75,21 +75,13 @@ bool mem_size_valid_bytes(upx_uint64_t bytes);
 
 #define New(type, n) new type[mem_size_get_n(sizeof(type), n)]
 
-int ptr_diff(const char *p1, const char *p2);
-
-inline int ptr_diff(const unsigned char *p1, const unsigned char *p2) {
-    return ptr_diff((const char *) p1, (const char *) p2);
-}
-
-inline int ptr_diff(const void *p1, const void *p2) {
-    return ptr_diff((const char *) p1, (const char *) p2);
-}
+int ptr_diff(const void *p1, const void *p2);
 
 template <class T1, class T2>
-inline int ptr_udiff(const T1 &p1, const T2 &p2) {
+inline unsigned ptr_udiff(const T1 &p1, const T2 &p2) {
     int d = ptr_diff(p1, p2);
     assert(d >= 0);
-    return d;
+    return ACC_ICONV(unsigned, d);
 }
 
 /*************************************************************************