changes in 32-bit Cygwin OpenGL causing crashes?

[<lloyd.wood@yahoo.co.uk>]

Have there been any changes to OpenGL libraries in 32-bit cygwin in the last six months?

The opengl application I use (geomview 1.9.5) is now crashing on an uptodate Cygwin where it worked previously. (Can't compare with previous Cygwin install - had to replace drive)

It runs without texturemapping when opengl is not used (geomview -noopengl -run savi), suggesting problem is with opengl.

Building with -g and using gdb to backtrace shows nothing helpful, suggesting problem
is with opengl libraries?

To duplicate crashing:

http://www.geomview.org/download

cd geomview-1.9.5
./configure --enable-d1debug   (to build with -g throughout)
make         (ignore any pdf build errors after binary is built; that's just TeX for you. lots of
gcc -DHAVE_CONFIG_H -I. -I../../../.. -I../../../../include    -g -MT stack.o -MD -MP -MF .deps/stack.Tpo -c -o stack.o stack.c 
etc.
)
cd ..

http://savi.sf.net/
cd savi1.4.9
make ARCH=cygwin
../geomview-1.9.5/geomview -gdb -run ./savi

thanks
 
Lloyd Wood
http://savi.sf.net/


 ~/savi/savi-dev 
$ ../geomview-1.9.5/geomview -gdb 
GNU gdb (GDB) (Cygwin 7.10.1-1) 7.10.1 
Copyright (C) 2015 Free Software Foundation, Inc. 
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> 
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and "show warranty" for details. 
This GDB was configured as "i686-pc-cygwin". 
Type "show configuration" for configuration details. 
For bug reporting instructions, please see: 
<http://www.gnu.org/software/gdb/bugs/>. 
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For help, type "help". 
Type "apropos word" to search for commands related to "word"... 
Reading symbols from /home/ellowoo/savi/geomview-1.9.5/src/bin/geomview/x11/gvx...(no debugging symbols found)...done. 
(gdb) run 
Starting program: /home/ellowoo/savi/geomview-1.9.5/src/bin/geomview/x11/gvx 
[New Thread 13512.0x2384] 
[New Thread 13512.0x365c] 
[New Thread 13512.0x2538] 
[New Thread 13512.0x300c] 
[New Thread 13512.0x31f8] 
ui_install_mode: name=[r] Rotate, proc=43cb32 
ui_install_mode: name=[z] Cam Zoom, proc=43cbb9 
ui_install_mode: name=[t] Translate, proc=43cb4d 
ui_install_mode: name=[f] Cam Fly, proc=43cb83 
ui_install_mode: name=[o] Cam Orbit, proc=43cb9e 
ui_install_mode: name=[s] Geom Scale, proc=43cbd4 
gv_event_mode: estate.motionproc <- 43cb32 
minterp_switch: event(dev=504, val=  0, x=   0, y=   0, t=0) 
interp_switch: ctls->buttons = leftmouse 
mousedisp: dx <-   0.000000, dy <-   0.000000, dt <- 0 
minterp_switch: mousedisp returned : dx =   0.000000, dy =   0.000000, dt = 0 
XtAddEventHandler(... panel_input [0] ...) 
XtAddEventHandler(... cam_expose ...) 
XtAddEventHandler(... panel_input [1] ...) 
XtAddEventHandler(... cam_mouse ...) 
XtAddEventHandler(... cam_mousecross ...) 
XtAddEventHandler(... cam_mousecross ...) 
panel_input: case MapNotify 
SaVi: selected platform-specific binary ./bin/SaVi-cygwin.bin 

SaVi: defaulting to J2 orbital model. 
SaVi: compiled without zlib compression.minterp_switch: event(dev=505, val=  0, x=   0, y=   0, t=0) 
interp_switch: ctls->buttons = leftmouse 
mousedisp: dx <-   0.000000, dy <-   0.000000, dt <- 0 
minterp_switch: mousedisp returned : dx =   0.000000, dy =   0.000000, dt = 0 
gv_event_mode: estate.motionproc <- 43cb9e 
minterp_switch: event(dev=504, val=  0, x=   0, y=   0, t=0) 
interp_switch: ctls->buttons = leftmouse 
mousedisp: dx <-   0.000000, dy <-   0.000000, dt <- 0 
minterp_switch: mousedisp returned : dx =   0.000000, dy =   0.000000, dt = 0 
1 [main] gvx 13512 cygwin_exception::open_stackdumpfile: Dumping stack trace to gvx.exe.stackdump 
[Thread 13512.0x365c exited with code 35584] 
[Thread 13512.0x300c exited with code 35584] 
[Thread 13512.0x2538 exited with code 35584] 
[Inferior 1 (process 13512) exited with code 0105400] 
(gdb) bt 
No stack. 
(gdb) 
SaVi: thankyou for using SaVi. 

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