# Hi,
# I'm trying to make an oscilloscope using FLTK, because the display
opcode works only on X11.
# I successfully made a very simple (sinusoidal waveform calculating)
plug-in opcode looking at the documentation: ugur2.c For this one, I
have only one question. When I compiled it and made it a .so file and
called its opcode from Csound etc.  it said that "incompatible opcode"
I understand that this is because of MYFLT is default a float and my
Csound version is double. I added a line in the ugur2.c file "#define
MYFLT double" to handle the situation, it works but I get always a
warning which says MYFLT was defined twice. (It is defined in
csound.h) How can I say to compiler that MYFLT is double without
defining it twice.

# I do not know the cause of my second question. I added some FLTK
code for creating an FLTK window, which is the first example in
the FLTK documentation. (same file with additional code from FTLK
example: ugur4.cpp) But I do not know whether I made it correct.
# The file compiled without errors. I copied the .so file under
plugins64 folder but Csound gave this warning:

WARNING: could not open library '/usr/lib/csound/plugins64/ugur4.so'
(/usr/lib/csound/plugins64/ugur4.so: undefined symbol: _Znwj)

# What may be the reason of this warning?
# My system is Ubuntustudio 8.04 and csound 5.08 double version.
# Thanks in advance!
-ugur guney-