Mail Archives: cygwin/2003/05/03/16:07:01
On Sat, 3 May 2003, Francis Litterio wrote:
> Igor Pechtchanski wrote:
>
> > Short answer: unset your DISPLAY.
> >
> > Long answer: rxvt is compiled with support for both X11 and W11 (which is
> > rxvt's emulation of X on native Windows). At runtime, it checks whether X
> > is running, and if it isn't (DISPLAY is unset), rxvt loads and uses the
> > W11 library.
>
> Igor,
>
> Thanks, but that did not solve the problem. I found the code that makes
> that decision in function XOpenDisplay() in rxvt/W11/wrap/wrap.c:
>
> Display * XOpenDisplay(const char *name) {
> ATOM class;
> char *env_var=NULL;
> if (_libname==NULL)
> {
> env_var = getenv("W11_LIBRARY");
> if (env_var!=NULL) _libname = strdup(env_var);
> else if (name==NULL || !strcmp(name,":0")) {
> _libname="libW11";
> class = _register_window_class();
> _set_atom(class);
> func_W11AddEventHandler=(proto_W11AddEventHandler *)_loadfunc("W11AddEventHandler");
> }
> else _libname="libX11";
> }
> ...
> }
>
> But that function does not seem to be linked into the executable:
>
> bash$ strings -a src/rxvt.exe | grep W11_LIBRARY
> bash$
>
> wrap.c is compiled and built into W11/lib/libX11.a, but for some reason
> that library isn't linked into the executable, so the above
> implementation of XOpenDisplay() isn't being used. Here are some
> relevant excerpts from the build:
>
> gcc -O -c wrap.c -I.. -mwin32
> windres -i rxvt.rc -o rxvt_res.o
> ar r ../lib/libX11.a wrap.o rxvt_res.o
> ...
> /bin/sh ../libtool --mode=link gcc -g -O2 rxvt.o librxvt.la -L/usr/X11R6/lib -Wl,-rpath -Wl,/usr/X11R6/lib -lX11 -o rxvt
> gcc -g -O2 rxvt.o -Wl,-rpath -Wl,/usr/X11R6/lib -o rxvt ./.libs/librxvt.a -L/usr/X11R6/lib -lX11
>
> Here's the exact sequence of commands I'm using:
>
> bzcat rxvt-2.7.10-3-src.tar.bz2 | tar xvf -
> cd rxvt
> ./configure --prefix=/usr/local
> make
> unset DISPLAY
> env | grep DISPLAY # To verify previous command.
> src/rxvt.exe
>
> Then there's a pause for six or seven seconds, and I see:
>
> rxvt: can't open display :0
>
> Am I configuring the source incorrectly? Any help is appreciated.
> --
> Francis Litterio
Francis,
IIRC, the W11 library is built as a DLL (libW11.dll), so you won't find
the string W11_LIBRARY in rxvt.exe. For rxvt to find the DLL, it has to
either be in your path, or in the same directory as rxvt.exe. It's quite
possible that if rxvt doesn't find this DLL it reverts to X11 code.
Try copying libW11.dll from wherever it's built to src/ and running
rxvt.exe again with DISPLAY unset.
After "make install" both rxvt.exe and libW11.dll go into $prefix/bin, so
this is not a problem.
Igor
--
http://cs.nyu.edu/~pechtcha/
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