Hi
Did you try building with -std=c99?
On Mon, Feb 22, 2010 at 11:39:44PM +0000, Alexander Nasonov wrote:
> After being subscribed to this list for a while, the list is
> apparently alive. Seems like my message was sent at the worng time.
>
> Nikolas,
> What's your view on using a buffer with a size known only at runtime?
>
> Thanks,
> Alex
>
> Alexander Nasonov wrote:
> > Hi,
> >
> > CMSG_SPACE(sizeof(int)) does not return a constant on NetBSD.
> > If you compile tmux with the Intel C++ compiler 11.1, the program
> > will crash in msgbuf_write because the compiler can't deduce a size
> > of buf and sets it to 0:
> >
> > union {
> > struct cmsghdr hdr;
> > char buf[CMSG_SPACE(sizeof(int))];
> > } cmsgbuf;
> >
> > and the result of sizeof(buf) is 0. This leads to a crash.
> >
> > Any chance to get this fixed in the next version?
> >
> > Thanks,
> > Alex
> >
> > PS see this commit message in NetBSD repository for more information about
> > CMSG_SPACE:
> >
> > http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/sys/socket.h?only_with_tag=MAIN#rev1.51
> >
> > Revision 1.51 / (download) - annotate - [select for diffs], Thu Mar 2
> > 07:41:50 2000 UTC (9 years, 8 months ago) by itojun
> > Branch: MAIN
> > Changes since 1.50: +10 -4 lines
> > Diff to previous 1.50 (colored)
> >
> > make CMSG_ALIGN always synchronize with kernel's idea of ALIGNBYTES.
> > ancillary data alignment will be ALIGNBYTES, not sizeof(long) - 1, from now.
> >
> > CMSG_xx will NOT resolve into constant. if you use CMSG_xx to allocate
> > arrays, you'll lose.
> >
> > bump shlib minor for libc.
> >
> > NOTE: if you are on top of arch with ALIGNBYTES != sizeof(long) - 1,
> > you need to recompile IPv6-related binaries. there is no way to guarantee
> > backward compat in this aspect. sorry for this. this should be the last
> > backward compat breakage for IPv6-related ancillary data manipulation.
> > (we still have PR 9516 for unix-domain sockets...)
> >
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