Thanks for your reply.. Here's what I got <div style="margin-left:40px;font-family:courier new,monospace">[root@vizwall jcX Files]# ldd ./HelloX libX11.so.6 => /usr/lib64/libX11.so.6 (0x00000033efe00000) libc.so.6 => /lib64/libc.so.6 (0x00000033eda00000) libXau.so.6 => /usr/lib64/libXau.so.6 (0x00000033f0600000) libXdmcp.so.6 => /usr/lib64/libXdmcp.so.6 (0x00000033f0200000) libdl.so.2 => /lib64/libdl.so.2 (0x00000033ee200000) /lib64/ld-linux-x86-64.so.2 (0x00000033ed600000) [root@vizwall jcX Files]# </div> As non-root user.. this is the output. <div style="margin-left:40px">bash-3.2$ ./HelloX Xlib: connection to ":0.0" refused by server Xlib: No protocol specified ./HelloX: couldn't connect to X server (null) bash-3.2$ bash-3.2$ ldd ./HelloX libX11.so.6 => /usr/lib64/libX11.so.6 (0x00000033efe00000) libc.so.6 => /lib64/libc.so.6 (0x00000033eda00000) libXau.so.6 => /usr/lib64/libXau.so.6 (0x00000033f0600000) libXdmcp.so.6 => /usr/lib64/libXdmcp.so.6 (0x00000033f0200000) libdl.so.2 => /lib64/libdl.so.2 (0x00000033ee200000) /lib64/ld-linux-x86-64.so.2 (0x00000033ed600000) bash-3.2$ </div> -jerrold <div class="gmail_quote">On Tue, May 1, 2012 at 1:23 AM, walter harms <<a href="mailto:wharms@bfs.de" target="_blank">wharms@bfs.de</a>> wrote: <blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> Am 30.04.2012 22:15, schrieb Jerrold Clint Balansi: <div class="im">> Hi wh, > > I did your instruction and it compiled. Here's what I got. > > [root@vizwall jcX Files]# make > cc -Wall HelloX.c -lX11 -o HelloX > [root@vizwall jcX Files]# ./HelloX > X connection to :0.0 broken (explicit kill or server shutdown). > [root@vizwall jcX Files]# > </div>to be fair, i am confused. 1. root@vizwall -> indicates that you are running as root you should try things always as USER 2. "X connection to :0.0 broken" should appear when the connection to the server (== your display) is gone. this happens when you have a remote login (do you ?) but :0.0 shows that is the local box and from the other mail i see that xclock is working .... wild guess ... could you please check with "ldd ./hellox" is there something missing ? my output looks like these: ldd ./hellox linux-vdso.so.1 => (0x00007fffff1ff000) libX11.so.6 => /usr/lib64/libX11.so.6 (0x00007f01e385e000) libc.so.6 => /lib64/libc.so.6 (0x00007f01e3505000) libxcb-xlib.so.0 => /usr/lib64/libxcb-xlib.so.0 (0x00007f01e3303000) libxcb.so.1 => /usr/lib64/libxcb.so.1 (0x00007f01e30e7000) libXau.so.6 => /usr/lib64/libXau.so.6 (0x00007f01e2ee3000) libdl.so.2 => /lib64/libdl.so.2 (0x00007f01e2cdf000) /lib64/ld-linux-x86-64.so.2 (0x00007f01e3b9b000) re, wh <div class="HOEnZb"><div class="h5"> > Is there anyting I should know why I'm getting this X connection to :0.0 > broken (explicit kill or server .. Thank you. > > > -jerrold > > > On Fri, Apr 27, 2012 at 5:28 AM, walter harms <<a href="mailto:wharms@bfs.de">wharms@bfs.de</a>> wrote: > >> >> >> Am <a href="tel:24.04.2012%2011" value="+12404201211">24.04.2012 11</a>:51, schrieb Michal Hejduk: >>> On Monday 23 of April 2012 14:13:28 Jerrold Clint Balansi wrote: >>> >>> Hi Julien, >>> I'm sorry that I'm pretty much new in to this Xlib programming, how >> exactly >>> can I do that? >>> >>> Thank you for your help. >>> >>> -jerrold >>> >> hi jerrold, >> please save the 3 lines below in a file called "makefile", then start make. >> Give you have all needed libes it should work the example complies for me >> without problems. >> >> re, >> wh >> >> LOADLIBES=-lX11 >> CFLAGS=-Wall >> hellox: >> >> >>> >>> On Mon, Apr 23, 2012 at 2:10 PM, Julien Cristau <<a href="mailto:jcristau@debian.org">jcristau@debian.org</a>> >> wrote: >>> >>> On Mon, Apr 23, 2012 at 13:55:34 -0700, Jerrold Clint Balansi wrote: >>> >>>> Hello, >>>> >>>> I am trying to make a Hello World program from code from this site: >>>> <a href="http://www.paulgriffiths.net/program/c/srcs/helloxsrc.html" target="_blank">http://www.paulgriffiths.net/program/c/srcs/helloxsrc.html</a> >>>> >>>> However, when I try to compile and run it I get this error. Can some >> give >>>> me a hint. Thank you. >>>> >>>> [root@vizwall Desktop]# gcc -o HelloX HelloX.c >>>>> /tmp/ccMGGmGj.o: In function `main': >>>>> HelloX.c:(.text+0x42): undefined reference to `XAllocSizeHints' >>> >>> >>> You need to link with -lX11. >>> >>> Cheers, >>> Julien >>> >>> >>> Compile with: >>> >>> gcc -lX11 -o HelloX HelloX.c >>> >>> Nazdar >>> Michal >>> >>> >>> >>> >>> >>> _______________________________________________ >>> <a href="mailto:xorg@lists.x.org">xorg@lists.x.org</a>: X.Org support >>> Archives: <a href="http://lists.freedesktop.org/archives/xorg" target="_blank">http://lists.freedesktop.org/archives/xorg</a> >>> Info: <a href="http://lists.x.org/mailman/listinfo/xorg" target="_blank">http://lists.x.org/mailman/listinfo/xorg</a> >>> Your subscription address: <a href="mailto:wharms@bfs.de">wharms@bfs.de</a> >> _______________________________________________ >> <a href="mailto:xorg@lists.x.org">xorg@lists.x.org</a>: X.Org support >> Archives: <a href="http://lists.freedesktop.org/archives/xorg" target="_blank">http://lists.freedesktop.org/archives/xorg</a> >> Info: <a href="http://lists.x.org/mailman/listinfo/xorg" target="_blank">http://lists.x.org/mailman/listinfo/xorg</a> >> Your subscription address: <a href="mailto:jcx4ever@gmail.com">jcx4ever@gmail.com</a> >> > </div></div></blockquote></div>