[Xcb] problem when compiling xcb

Jamey Sharp jamey at minilop.net
Sat Nov 6 15:51:18 PST 2004

Hey, thanks for the reports. Sounds like you both have the same problem,
and since I haven't seen it myself I'm guessing you're both using GCC
3.4, or perhaps you're both using an old glibc, or something along those

I'm guessing that this is due to my use of the __thread storage class
modifier in xcb/src/xcb_conn.c. I'd already had a report that this
breaks GCC 2.95. Fortunately, that variable is only supporting an
assertion and can be safely removed.

Could you two try removing the line
	static __thread int already_here = 0;
and all the references to the variable "already_here" in the
_xcb_conn_wait function, and let me know whether XCB compiles
successfully for you then?


On Fri, Oct 29, 2004 at 04:07:35PM -0400, Timothy Dawes wrote:
> I can't seem to figure this out (___tls_get_addr).  My machine is GNU/Linux 
> (, gcc-3.4.2, binutils-2.15.  Any help, is greatly appreciated.
> (./configure --prefix=/usr --enable-dependency-tracking --with-opt && make)
> ...
> /bin/sh ../libtool --mode=link gcc -include config.h -g -Wall -pedantic 
> -Wpointer-arith         -Wstrict-prototypes -Wmissing-declarations 
> -Wnested-externs -I/usr/include/X11/XCB   -D_XOPEN_SOURCE=500       -o 
> check_all  check_all-check_all.o check_all-check_public.o -lXCB -lcheck 
> gcc -include config.h -g -Wall -pedantic -Wpointer-arith -Wstrict-prototypes 
> -Wmissing-declarations -Wnested-externs -I/usr/include/X11/XCB 
> -D_XOPEN_SOURCE=500 -o .libs/check_all check_all-check_all.o 
> check_all-check_public.o  /usr/src/usr/xcb/src/.libs/libXCB /usr/lib/libXau 
> -lcheck
> /usr/src/usr/xcb/src/.libs/libXCB: undefined reference to `___tls_get_addr'
> collect2: ld returned 1 exit status
> make[2]: *** [check_all] Error 1

On Fri, Nov 05, 2004 at 02:25:37PM +0100, Vincent Torri wrote:
> i'm wanting to compile xcb, but i have the following error during the
> linking stage:
> undefined reference to `___tls_get_addr'
Jamey Sharp <jamey at minilop.net> - http://minilop.net/
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