Dear Rooters Now that my GUI works I would like to compile it as standalone program and to link it to my two libraries, libMyClassA and libMyClassB (where libMyClassB is needed by libMyClassA only). Here is the output of compiling and linking: [christian@pbook xps]$ gmake -f Makefile4Mygui g++ -O -Wall -fPIC -fsigned-char -I/usr/X11/include -I/home/christian/rt/root/include -c Mygui.cxx Generating dictionary MyguiDict.cxx...c Class TMyFrame: Streamer() not declared Class TMyFrame: ShowMembers() not declared ...etc... g++ -O -Wall -fPIC -fsigned-char -I/usr/X11/include -I/home/christian/rt/root/include -c MyguiDict.cxx g++ -O -o Mygui Mygui.o MyguiDict.o -L. -lMyClassB -lMyClassA -L/home/christian/rt/root/lib -lCore -lCint -lHist -lGraf -lGraf3d -lGpad -lTree -lRint -lPostscript -lMatrix -lPhysics -lGui -lm -ldl -rdynamic Mygui.o: In function `TMyFrame::FRun(void)': Mygui.o(.text+0x4948): undefined reference to `TMyClassB::TMyClassB(char const *)' ...etc... collect2: ld returned 1 exit status gmake: *** [Mygui] Error 1 Sorrowly, the linker does not find the reference to MyClassB. The following command line does also not work: g++ -O Mygui.o MyguiDict.o -L. -lMyClassB -lMyClassA -L/home/christian/rt/root/lib -lCore -lCint -lHist -lGraf -lGraf3d -lGpad -lTree -lRint -lPostscript -lMatrix -lPhysics -lGui -lm -ldl -rdynamic -o Mygui Can someone give me a hint what might be the reason? Do I need to create a make file which compiles the libraries together with the GUI program? Thank you in advance Best regards Christian ---------------------------------- C.h.r.i.s.t.i.a.n S.t.r.a.t.o.w.a V.i.e.n.n.a, A.u.s.t.r.i.a
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