g++.exe: cannot specify -o with -c or -S and multiple compilations

[Christian Lott <c65 cox net>]

I followed the directions to the T under the Windows installation 
directions. I found nothing confusing about it, yet I get this compile 
error:

Compiler: Default compiler
Building Makefile: "C:\Dev-Cpp\Makefile.win"
Executing  make...
make.exe -f "C:\Dev-Cpp\Makefile.win" all
g++.exe -c gtkmm/gtkmm-demo/example_buttonbox.cc -o 
gtkmm/gtkmm-demo/example_buttonbox.o -I"C:/Program Files/Common 
Files/GTK/2.0/INCLUDE"  -I"C:/Program Files/Common 
Files/GTK/2.0/INCLUDE/GTK-2.0"  -I"C:/Program Files/Common 
Files/GTK/2.0/INCLUDE/GLIB-2.0"  -I"C:/Program Files/Common 
Files/GTK/2.0/INCLUDE/PANGO-1.0"  -I"C:/Program Files/Common 
Files/GTK/2.0/INCLUDE/ATK-1.0"  -I"C:/Program Files/Common 
Files/GTK/2.0/INCLUDE/GTKGLEXT-1.0"  -I"C:/Program Files/Common 
Files/GTK/2.0/LIB/GTK-2.0/INCLUDE"  -I"C:/Program Files/Common 
Files/GTK/2.0/LIB/GLIB-2.0/INCLUDE"  -I"C:/Program Files/Common 
Files/GTK/2.0/LIB/GTKGLEXT-1.0/INCLUDE"  -I"C:/Program Files/Common 
Files/GTK/2.0/INCLUDE/LIBGLADE-2.0"  -I"C:/Program Files/Common 
Files/GTK/2.0/INCLUDE/LIBXML2"  -I"C:/Dev-Cpp/include/c++/3.3.1"  
-I"C:/Dev-Cpp/include/c++/3.3.1/mingw32"  
-I"C:/Dev-Cpp/include/c++/3.3.1/backward"  
-I"C:/Dev-Cpp/lib/gcc-lib/mingw32/3.3.1/include"  
-I"C:/Dev-Cpp/include"  -IC:/DEV-CPP/GTKMM/include/gtkmm-2.4 
-IC:/DEV-CPP/GTKMM/lib/gtkmm-2.4/include -I 
C:/DEV-CPP/GTKMM/include/glibmm-2.4 
-IC:/DEV-CPP/GTKMM/lib/glibmm-2.4/include -I 
C:/DEV-CPP/GTKMM/include/gdkmm-2.4 
-IC:/DEV-CPP/GTKMM/lib/gdkmm-2.4/include -IC: 
/DEV-CPP/GTKMM/include/pangomm-1.4 -IC:/DEV-CPP/GTKMM/include/atkmm-1.6 
-IC:/DEV -CPP/GTKMM/include/sigc++-2.0 
-IC:/DEV-CPP/GTKMM/lib/sigc++-2.0/include -IC:/PRO 
GRA~1/COMMON~1/GTK/2.0/include/gtk-2.0 
-IC:/PROGRA~1/COMMON~1/GTK/2.0/include/gl ib-2.0 
-IC:/PROGRA~1/COMMON~1/GTK/2.0/lib/glib-2.0/include 
-IC:/PROGRA~1/COMMON~ 1/GTK/2.0/lib/gtk-2.0/include 
-IC:/PROGRA~1/COMMON~1/GTK/2.0/include/pango-1.0 - 
IC:/PROGRA~1/COMMON~1/GTK/2.0/include/atk-1.0   g++.exe: cannot specify 
-o with -c or -S and multiple compilations make.exe: *** 
[gtkmm/gtkmm-demo/example_buttonbox.o] Error 1 Execution terminated
----

If I did something stupid, please say so. I use WinXP.


Christian Lott