On Sun, 29 Oct 2000, Bosko Milekic wrote:

> sys/mbuf.h unfortunately includes sys/mutex.h
> No obvious workaround is in sight, to my knowledge, anyway.

No workaround is necessary for this particular problem.  sys/mutex.h
protects itself against multiple inclusion.

> On Sun, 29 Oct 2000, Darren Reed wrote:
> > IP Filter doesn't introduce a "struct mtx" which suggests something isn't
> > protecting against multiple inclusions or similar ?

> > (ref5:~/freebsd/src/usr.sbin/ipftest) make
> > Warning: Object directory not changed from original 
> > cc -O -pipe -DIPL_NAME=\"/dev/ipl\" -I- 
>-I/d/home/darrenr/freebsd/src/usr.sbin/ipftest/../../contrib/ipfilter   -c 
> > In file included from 
> >                  from 
> > /d/home/darrenr/freebsd/src/usr.sbin/ipftest/../../sys/sys/mutex.h:110: 
>redefinition of `struct mtx'
> > *** Error code 1

Your <machine/mutex.h> is apparently out of date.  With all those -I
paths, it is hard to tell where includes are found.  The
-I${.CURDIR}/../../sys hack is particularly evil.  It makes no difference
for "make world", but for plain make it causes the src-relative version
of <sys> to be found, but there is no hack to find the src-relative
version of <machine> so the installed version gets used.


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