libstdc++ linking problem

[michele]

I hope that this message wouldn't be OT. If so, please, tell me where to 
 post... :)

I am compiling a simple application of a package, (vrjuggler, a virtual 
reality suite). My configuration is a Mandrake 10.1 with gcc 3.4.1

When i link the .o files (i am not epert programmer, i just use make) 
there is a warning message:
the libstdc++.so.5 may conflict with libstdc++.so.6 one.

How can i "say" to the compiler to use the libstdc++.so.5 library? I 
found it in my /usr/lib path, bath i am not able to link.

I would really appreciate ANY kind of help. Thanks


PS:
this is the content of the makefile:
//comments

all: osgNav

APP_NAME=       osgNav

# Basic options.
srcdir=         .
SRCS=           OsgNav.cpp main.cpp

NO_DEPEND=      YES

include $(VJ_BASE_DIR)/share/vrjuggler/vrj.appdefs.mk
include $(DZR_BASE_DIR)/ext/vrjuggler/dzr.vrjuggler.glapp.mk
include $(DZR_BASE_DIR)/ext/tweek/dzr.tweek.mk

EXTRA_INCLUDES+=        -I$(OSGHOME)/include
EXTRA_LIBS+=		-L$(OSGHOME)/lib -losg -losgDB -losgGA -losgUtil 
-lOpenThreads -L/home/michele/lib

CXX_GEN_DIR=            .
PYTHON_GEN_DIR=         remotenav/Server

vpath %.idl $(srcdir)/remotenav/Subject/idl
vpath %.cpp $(CXX_GEN_DIR)
vpath %.h $(CXX_GEN_DIR)
vpath %.py $(PYTHON_GEN_DIR)

ifeq ($(TWEEK_HAVE_CXX), Y)
CXX_IDL=                $(TWEEK_IDL_CXX)
CXX_IDL_OPTS=           $(TWEEK_IDLFLAGS_CXX)                   \
                        $(TWEEK_IDL_GENDIR_CXX)$(CXX_GEN_DIR)
CXX_IDL_INCLUDES=       

EXTRA_CXXFLAGS+=        $(TWEEK_CXX_FLAGS)
EXTRA_INCLUDES+=        -I$(CXX_GEN_DIR)
EXTRA_LIBS+=            $(TWEEK_LIBS) $(TWEEK_EXTRA_LIBS_MIN)

IDL_CXX_FILES=          RemoteNavSubject.cpp RemoteNavSubject.h

# Need to not do this unless target is "remote"
SRCS+=                  RemoteNavSubject.cpp
endif

# Build python stuff
ifeq ($(TWEEK_HAVE_PYTHON), Y)
PYTHON_IDL=             $(TWEEK_IDL_PYTHON)
PYTHON_IDL_OPTS=        $(TWEEK_IDLFLAGS_PYTHON)                        \
                        $(TWEEK_IDL_GENDIR_PYTHON)$(PYTHON_GEN_DIR)
PYTHON_IDL_INCLUDES=    

IDL_PYTHON_FILES=       RemoteNavSubject_idl.py
endif

# 
-----------------------------------------------------------------------------
# Application build targets.
# 
-----------------------------------------------------------------------------
all:
        $(MAKE) $(APP_NAME)

remote:
        $(MAKE) cxx_idl
#       $(MAKE) python_idl
        $(MAKE) NO_DEPEND=0 cxx
        $(MAKE) $(APP_NAME)
#       $(MAKE) python
#       -$(MAKE) install

osgNav: $(OBJS)
        $(LINK) $(LINK_OUT)$@ $(OBJS) $(EXTRA_LIBS) $(LIBS)

cxx_idl: $(IDL_CXX_FILES)

%.cpp %.h: %.idl
        $(CXX_IDL) $(CXX_IDL_OPTS) $(CXX_IDL_INCLUDES) $<

python_idl: $(IDL_PYTHON_FILES)

%.py: %.idl
        $(PYTHON_IDL) $(PYTHON_IDL_OPTS) $(PYTHON_IDL_INCLUDES) $<

cxx: $(OBJS)

CLEAN_FILES+=   $(addprefix $(CXX_GEN_DIR)/, $(IDL_CXX_FILES))          \
                $(addprefix $(PYTHON_GEN_DIR)/, $(IDL_PYTHON_FILES))