configure.ac: pthread-stubs is not a thing on GNU/kFreeBSD
As mentioned on the xcb mailing list, the platform uses the GLIBC
forwarding mechanism.
https://lists.freedesktop.org/archives/xcb/2016-November/010896.html
Reported-by: Andreas Boll <andreas.boll.dev@gmail.com>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Andreas Boll <andreas.boll.dev@gmail.com>
diff --git a/configure.ac b/configure.ac
index 036f65a..7b9369b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -64,7 +64,7 @@
dnl pthread-stubs is mandatory on BSD platforms, due to the nature of the
dnl project. Even then there's a notable issue as described in the project README
case "$host_os" in
-linux* | cygwin* | darwin* | solaris* | gnu*)
+linux* | cygwin* | darwin* | solaris* | *-gnu* | gnu*)
pthread_stubs_possible="no"
;;
* )