Greetings: I've been trying to solve this one for a while but I can't see the light. I'm compiling Istvan Varga's beta 4.24.2 Csound for Linux, but I'm stuck here: g++ -pipe -Wall -O2 -ffast-math -fomit-frame-pointer -finline-functions -funroll-loops -fno-strict-aliasing -fPIC -DPIC -I. -I. -I./include -I./opcodes -DWINDOWS -DSFIRCAM -DSYS5 -DLINUX -DHAVE_TERMIOS_H -DIV_VERSION -DPIPES -DMACROS -DHAVE_FLTK -D_REENTRANT -DMYFLT=float -march=i686 -falign-functions=16 -falign-loops=16 -falign-jumps=16 -frename-registers -mno-ieee-fp -mno-sse -fno-exceptions -fno-rtti -fno-unroll-loops -I/usr/local/include/FL -c widgets.cpp -o widgets.o widgets.cpp: In method `int Fl_Knob::handle (int)': widgets.cpp:230: `atan2' undeclared (first use this function) widgets.cpp:230: (Each undeclared identifier is reported only once for each function it appears in.) widgets.cpp: In method `void Fl_Knob::draw_scale (int, int, int)': widgets.cpp:289: `cos' undeclared (first use this function) widgets.cpp:290: `sin' undeclared (first use this function) widgets.cpp:310: `log10' undeclared (first use this function) widgets.cpp:278: warning: `float ca' might be used uninitialized in this function widgets.cpp:278: warning: `float sa' might be used uninitialized in this function widgets.cpp: In method `void SNAPSHOT::get (vector<ADDR_SET_VALUE, allocator<ADDR_SET_VALUE> > &)': widgets.cpp:1171: `::pow' undeclared (first use here) widgets.cpp:1172: `log' undeclared (first use this function) widgets.cpp: In function `void fl_callbackJoystick (Fl_Widget *, void *)': widgets.cpp:1759: warning: `float val' might be used uninitialized in this function make: *** [widgets.o] Error 1 [dlphilp@localhost Csound-4.24.1]$ I understand that the missing functions are math functions, but math.h is included at the start of widgets.cpp. Unfortunately widgets.cpp is about 104 KB so I didn't want to send it along with this message. If anyone wants to look at it I'll gladly send it off-list. But it seems I've run into this kind of problem before, that it's some sort of C vs. C++ thing... but I also know less than zero about C++... (and only a wee bit more about C)... TIA to anyone who can assist ! Best regards, == Dave Phillips The Book Of Linux Music & Sound at http://www.nostarch.com/lms.htm The Linux Soundapps Site at http://linux-sound.org