[Mesa3d-dev] Debugging OSmesa16

[J.P. D. <jpd...@cs...>]

Hi,

I've started experimenting with the OSmesa16 library on linux and wrote
a simple program based on osdemo16 that draws a single smooth shaded
triangle. I've managed to import the off-screen 16-bit data into Matlab
to do some checks. The program works fine without
glEnable(GL_SMOOTH_POLYGON), but with it gives a garbled triangle. I
would like to familiarise myself with the OSmesa16 code and trace the
origin of the error, but I need some pointers on debugging the lib. I'm
using ddd with gdb and when setting breakpoints e.g. in
swrast/s_triangle.c gdb complains:
Error in re-setting breakpoint 1:
No source file named swrast/s_triangle.c.

I've tried using the gdb dir command to add source search dirs with no
success.

gdb> info shar gives:
From        To          Syms Read   Shared Object Library
0x40015000  0x4002fe30  Yes         /home/jpdelport/Mesa/lib/libGLU.so.1
0x40030000  0x40388fc4  Yes        
/home/jpdelport/Mesa/lib/libOSMesa16.so.1
0x4038e000  0x403aa9d8  Yes         /lib/libm.so.6
0x403ab000  0x403bd138  Yes         /lib/libpthread.so.0
0x403bf000  0x404b385c  Yes         /lib/libc.so.6
0x40000000  0x40013ed0  Yes         /lib/ld-linux.so.2

I compiled (from a CVS checkout on 28/05) libOSMesa16 with: make -f
Makefile.X11 linux-osmesa16
and compiled libGLU by going to src-glu and doing: make -f Makefile.X11
linux-debug

Any pointers to what I'm doing wrong or how I'm supposed to set up an
OSmesa debugging session would be appreciated.

thanks
jp