problem compiling test program

[Amerson]

Hi,

I'm trying to use the Crypt++ 5.1 methods.

I wrote a simple program:

doall.cpp:
//////////////////////
#include "cryptlib.h"
#include "base64.h"

using namespace CryptoPP;

int func();

int func(){
        Base64Encoder enc ;
        return 0
}

int main()
{
        func();
}
///////////////////////////////

doall.cpp is found in   /home/gaimfs
Crypt++ version 5.1 found in:    /home/gaimfs/crypto51  (downloaded crypto++ 5.1 zip file and compiled)
cryptest -v works fine, all tests pass
OS: redhat linux 8.0

I run g++ -Icrypto51 doall.cpp and it gives me this bunch of errors:

: undefined reference to `vtable for CryptoPP::FilterWithBufferedInput'
/tmp/ccoCvs3s.o(.gnu.linkonce.d._ZTIN8CryptoPP10BufferlessINS_6FilterEEE+0x8): undefined reference to `typeinfo for CryptoPP::Filter'
/tmp/ccoCvs3s.o(.gnu.linkonce.d._ZTIN8CryptoPP11UnflushableINS_6FilterEEE+0x8): undefined reference to `typeinfo for CryptoPP::Filter'
/tmp/ccoCvs3s.o(.gnu.linkonce.t._ZN8CryptoPP11UnflushableINS_6FilterEE5FlushEbib+0x2b): In function `CryptoPP::Unflushable<CryptoPP::Filter>::Flush(bool, int, bool)':
: undefined reference to `CryptoPP::BufferedTransformation::NULL_CHANNEL'
/tmp/ccoCvs3s.o(.gnu.linkonce.t._ZN8CryptoPP22BufferedTransformationD2Ev+0xb): In function `CryptoPP::BufferedTransformation::~BufferedTransformation [not-in-charge]()':
: undefined reference to `vtable for CryptoPP::BufferedTransformation'
/tmp/ccoCvs3s.o(.gnu.linkonce.t._ZN8CryptoPP22BufferedTransformationD2Ev+0x17): In function `CryptoPP::BufferedTransformation::~BufferedTransformation [not-in-charge]()':
: undefined reference to `vtable for CryptoPP::BufferedTransformation'
collect2: ld returned 1 exit status


any help on how to solve this problem would be great

thank you
amerson