I make a mistake here :/opt/csw/gcc3/bin,which include gcc cc，now i delete this  path and in
compiling .:)

thanks to all  :)  


> I am using SunStudio compiler. 
> this is my profile setting :
> 
> PATH=$PATH:/opt/csw/bin:/opt/csw/kde-gcc/bin:/opt/csw/kde-gcc/include:/opt/csw/kde-gcc/lib:/opt/csw/gcc3/bin:/usr/sfw/bin:/usr/ccs/bin:/opt/sfw/bin:/usr/ucb/:/export/home/MySunstdio11/SUNWspro/bin;
> export PATH
> cc=/export/home/MySunstdio11/SUNWspro/bin/cc;export cc
> CXX=/export/home/MySunstdio11/SUNWspro/bin/cc;export CXX
> QTDIR=/opt/csw/qt3.4.4/qt-x11-free-3.3.4
> PATH=$QTDIR/bin:$PATH
> MANPATH=$QTDIR/doc/man:$MANPATH
> LD_LIBRARY_PATH=$QTDIR/lib:$LD_LIBRARY_PATH
> export QTDIR PATH MANPATH LD_LIBRARY_PATH
> 
> 
> I don't set LDFlags ,CFLAGS and CXXFLAGS,In fact I don't know how to set.:(
> I konw CFLAGS and CXXFLAGS is c and c++ compile option,
> maybe this is the cause of  mistake?
> my machine is x86(DELL GX280).please give a usable setting of CFLAGS and CXXFLAGS.
> w hat LDFLAGS stand for?
> 
> too many question to all of you,and i program on windows for five years,maybe 
> I still not be ready  to work   on unix and linux.
> 
> 
>                                                                              Linda
>  
> 
> 
> > it looks like you are using gcc but are using CFLAGS/CXXFLAGS for SunStudio.
> > 
> > this won't work. :-)
> > 
> > -KPIC is a SunStudio compiler flag and it tells the compiler to generate 
> > Position Independent Code.
> > 
> > the equivalent for gcc is -fPIC -DPIC
> > 
> > the 't' invalid options comes from passing -mt to gcc/g++. -mt is also a 
> > SunStudio compiler flag, and it tells the compiler to use thread-safe API's 
> > and interfaces. it is usually used in conjunction with -D_REENTRANT. you can 
> > pass -D_REENTRANT to gcc, but gcc will not like '-mt' at all.
> > 
> > i would recommend you check your CFLAGS/CXXFLAGS/CPPFLAGS/LDFLAGS, and make 
> > sure they are appropriate for gcc/g++. otherwise you will run into endless 
> > grief. the compiler flags for gcc/g++ and SunStudio10 are incompatible (with 
> > the exception of basic -I and -L).
> > 
> > :-)
> > 
> > --Stefan
> > 
> > -- 
> > Stefan Teleman          'Nobody Expects the Spanish Inquisition'
> > steleman@nyc.rr.com                          -Monty Python
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