[GRASS5] Re: [GRASSLIST:2259] Re: NVIZ on Cygwin

[Glynn Clements]

Glynn Clements wrote:

> > > Unfortunately, almost everything which could possibly go wrong with
> > > building NVIZ results in exactly this error message (including the
> > > stuff which I've snipped).
> > >
> > > The only way to track such problems down is to use a debugger (e.g.
> > > gdb). If you can try the following, it may provide useful information:
> > >
> > > 	GRASS:~ > eval `g.gisenv`
> > > 	GRASS:~ > gdb /home/Rich/grass/grass-5.0.3/dist.i686-pc-cygwin/etc/nviz2.2/NVWISH2.2
> > > 	> run -f /home/Rich/grass/grass-5.0.3/dist.i686-pc-cygwin/etc/nviz2.2/scripts/nviz2.2_script ned_patch -name NVIZ
> > > 	[... segmentation fault ...]
> > > 	> where
> > 
> > I tried this, with slightly different results from Richard although they
> > don't look any more informative (see below). I used the 5.3 version of
> > NVIZ with the latest patches from Bob Covill.
> 
> Yesterday, I finally got around to compiling GRASS (5.3, no more than
> a week old) on Cygwin, and NVIZ works for me.
> 
> FWIW, the Tcl/Tk libraries which I'm using are:
> 
> -rwxrwxr-x    1 root     root       568244 Apr  6  2001 libtcl8.0.a
> -rwxrwxr-x    1 root     root       791790 Apr  6  2001 libtk8.0.a
> 
> c3c3068a82675fe65a1481257abee9d4  libtcl8.0.a
> e58da4259572da858fe3721f499382f6  libtk8.0.a
> 
> which are from:
> 
> -rwxrwxr-x    1 root     root      2002441 Feb  4 01:06 xtcltk8.0.5-CYGWIN_NT-4.0-20010405-1.tar.gz*
> 
> b9e35f4d9f13404dc40384d2cdec0b85  xtcltk8.0.5-CYGWIN_NT-4.0-20010405-1.tar.gz
> 
> I have both the 8.0.2 and 8.3.4 libraries installed, but the headers
> are those from 8.0.2.
> 
> I'll try again with 8.3.4.

Done that; NVIZ still works.

-r-xr-xr-x    1 root     root       749892 Mar 28  2002 libtcl8.3.a*
-r-xr-xr-x    1 root     root       985818 Mar 28  2002 libtk8.3.a*

fb69cc3342aa19f3fdb709738f6055e7  libtcl8.3.a
4e60b25c070637250f52aa13d5fcdc47  libtk8.3.a

From:

2983750b94c52b8a5ce1aa3e39e54e45  xtcltk-8.3.4-CYGWIN.tar.gz

> > Upon giving the above command, an empty (black) Windows command-line
> > window appeared; the title bar contained the name of the NVWISH2.2
> > program. The message
> > ---Type <return> to continue, or q <return> to quit---
> > then appeared in the terminal where NVIZ was started and on pressing
> > return, the segmentation fault happened.
> > 
> > What do the two question marks and empty brackets mean? Do the provided
> > xtcltk libaries have debugging information? Does anything else need to be
> > compiled with debugging turned on?

The xtcltk 8.3.4 libraries don't have debug info, but they weren't
compiled with -fomit-frame-pointer, so you should still get a
backtrace, and functions which are from the NVIZ source code can be
debugged.

Although, if I run NVWISH2.2 under gdb, I get a segfault in libXext,
but not if I run it directly (with identical arguments).

FWIW, the relevant Cygwin components are:

XFree86-bin-4.2.0-3.tar.bz2
XFree86-xserv-4.2.0-37.tar.bz2
binutils-20030307-1.tar.bz2
cygwin-1.3.22-1.tar.bz2
gcc-2.95.3-5.tar.bz2
gdb-20030303-1.tar.bz2
opengl-1.1.0-6.tar.bz2
sunrpc-4.0-1.tar.bz2
zlib-1.1.4-1.tar.bz2

-- 
Glynn Clements <glynn.clements at virgin.net>