Added uninstall hints.

README

@@ -124,6 +124,10 @@ Once Wine has been built correctly, you can do "make install"; this
 will install the wine executable, the Wine man page, and a few other
 needed files.
 
+Don't forget to uninstall any conflicting previous Wine installation
+first.  Try either "dpkg -r wine" or "rpm -e wine" or "make uninstall"
+before installing.
+
 If you want to build the documentation, you can run "make" in the
 documentation directory.
 

tools/wineinstall

@@ -183,6 +183,14 @@ if [ $RET -eq 0 ]; then
   fi
 fi
 
+# check whether wine binary still available
+if [ -n "`which wine`" ]; then
+  echo "Warning !! wine binary (still) found, which may indicate"
+  echo "a (conflicting) previous installation."
+  echo "You might want to abort and uninstall Wine first."
+  std_sleep
+fi
+
 # run the configure script, if necessary
 
 if [ -f config.cache ] && [ -f Makefile ] && [ Makefile -nt configure ]