Use _XPG6 on Solaris with GCC because the headers are insane and don't like GCC with -std=gnu99 and _XPG4_2. We should not really be using _XPG* at all but there doesn't seem to be a magic define that says "give me the latest standard", and things are further confused by the CMSG_DATA check in configure.ac which sets _XOPEN_SOURCE _XOPEN_SOURCE_EXTENDED.
Use _XPG6 on Solaris with GCC because the headers are insane and don't like GCC
with -std=gnu99 and _XPG4_2. We should not really be using _XPG* at all but
there doesn't seem to be a magic define that says "give me the latest
standard", and things are further confused by the CMSG_DATA check in
configure.ac which sets _XOPEN_SOURCE _XOPEN_SOURCE_EXTENDED.

While here add COPYING to EXTRA_DIST.

klaxalk/tmux,klaxalk/tmux,klaxalk/tmux,klaxalk/tmux,klaxalk/tmux