[Dev-C++] getting an undefined reference to `vtable for RtMidiOut'

Hi all,
as your last suggestion worked perfectly, I would like to ask you =
something
else related to the compilation of the  STK tutorials...I'm probably =
missing
a file but after including all the required stuff I can't find wat's
missing, maybe it's something subtle?...I'm just compilling the Control
Input example from the online tutorial and I attach you the compiler =
output,
should you give me a quick hint...it would save me tons of time :)!!!!
Thanks in advance, in case any of you have some time :)=20
Josep m
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=20
Compilador: Default compiler
Building Makefile: "C:\Dev-Cpp\provastk2\Makefile.win"
Executant  make...
make.exe -f "C:\Dev-Cpp\provastk2\Makefile.win" all
g++.exe -D__DEBUG__ -c main.cpp -o main.o
-I"C:/Dev-Cpp/lib/gcc/mingw32/3.4.2/include"
-I"C:/Dev-Cpp/include/c++/3.4.2/backward"
-I"C:/Dev-Cpp/include/c++/3.4.2/mingw32"  =
-I"C:/Dev-Cpp/include/c++/3.4.2"
-I"C:/Dev-Cpp/include"  -I"C:/stk/stk-4.2.1/include"
-I"C:/Dev-Cpp/Common/Include"  -I"C:/Dev-Cpp/Common"  -D__WINDOWS_DS__
-Wno-deprecated -D__LITTLE_ENDIAN__ -D__WINDOWS_MM__   -fexceptions
-fexpensive-optimizations -O3 -g3
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g++.exe -D__DEBUG__ main.o ../../stk/stk-4.2.1/src/WvOut.o
../../stk/stk-4.2.1/src/FileRead.o ../../stk/stk-4.2.1/src/FileWrite.o
../../stk/stk-4.2.1/src/FileWvIn.o ../../stk/stk-4.2.1/src/FileWvOut.o
../../stk/stk-4.2.1/src/Generator.o ../../stk/stk-4.2.1/src/RtAudio.o
../../stk/stk-4.2.1/src/RtWvOut.o ../../stk/stk-4.2.1/src/SineWave.o
../../stk/stk-4.2.1/src/Stk.o ../../stk/stk-4.2.1/src/WaveLoop.o
../../stk/stk-4.2.1/src/WvIn.o ../../stk/stk-4.2.1/src/Messager.o
../../stk/stk-4.2.1/src/RtMidi.o ../../stk/stk-4.2.1/src/Instrmnt.o
../../stk/stk-4.2.1/src/Socket.o ../../stk/stk-4.2.1/src/Thread.o
../../stk/stk-4.2.1/src/Mutex.o ../../stk/stk-4.2.1/src/Skini.o
../../stk/stk-4.2.1/src/TcpServer.o  -o "provaDevCpp.exe" =
-L"C:/Dev-Cpp/lib"
../lib/libdsound.a ../lib/libole32.a ../lib/libwinmm.a =
../lib/libwsock32.a
../lib/libuuid.a ../lib/libws2_32.a  -g3=20
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../../stk/stk-4.2.1/src/RtMidi.o(.text+0x265): In function
`ZN9RtMidiOutC1Ev':
C:/Dev-Cpp/../stk/stk-4.2.1/src/RtMidi.cpp:148: undefined reference to
`vtable for RtMidiOut'
../../stk/stk-4.2.1/src/RtMidi.o(.text+0x274):C:/Dev-Cpp/../stk/stk-4.2.1=
/sr
c/RtMidi.cpp:149: undefined reference to `RtMidiOut::initialize()'
../../stk/stk-4.2.1/src/RtMidi.o(.text+0x365): In function
`ZN9RtMidiOutC2Ev':
C:/Dev-Cpp/../stk/stk-4.2.1/src/RtMidi.cpp:148: undefined reference to
`vtable for RtMidiOut'
../../stk/stk-4.2.1/src/RtMidi.o(.text+0x374):C:/Dev-Cpp/../stk/stk-4.2.1=
/sr
c/RtMidi.cpp:149: undefined reference to `RtMidiOut::initialize()'
../../stk/stk-4.2.1/src/RtMidi.o(.text+0x699): In function
`ZN8RtMidiInC1Ev':
C:/Dev-Cpp/../stk/stk-4.2.1/src/RtMidi.cpp:73: undefined reference to
`vtable for RtMidiIn'
../../stk/stk-4.2.1/src/RtMidi.o(.text+0x6ba):C:/Dev-Cpp/../stk/stk-4.2.1=
/sr
c/RtMidi.cpp:74: undefined reference to `RtMidiIn::initialize()'
../../stk/stk-4.2.1/src/RtMidi.o(.text+0x8d9): In function
`ZN8RtMidiInC2Ev':
C:/Dev-Cpp/../stk/stk-4.2.1/src/RtMidi.cpp:73: undefined reference to
`vtable for RtMidiIn'
../../stk/stk-4.2.1/src/RtMidi.o(.text+0x8fa):C:/Dev-Cpp/../stk/stk-4.2.1=
/sr
c/RtMidi.cpp:74: undefined reference to `RtMidiIn::initialize()'
collect2: ld returned 1 exit status
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make.exe: *** [provaDevCpp.exe] Error 1
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Execuci=F3 finalitzada