m4_comment([$Id: macosx.so,v 11.14 2005/10/21 20:16:41 bostic Exp $])

m4_ref_title(Building m4_db for UNIX/POSIX systems,
    Mac OS X, Mac OS X, build_unix/linux, build_unix/osf1)

m4_nlistbegin

m4_nlist([dnl
m4_bold([When trying to link multiple m4_db language interfaces (for
example, Tcl, C++, Java, Python) into a single process, I get "multiple
definitions" errors from dyld.])

m4_p([dnl
To fix this problem, set the environment variable MACOSX_DEPLOYMENT_TARGET
to 10.3 (or your current version of OS X), and reconfigure and rebuild
m4_db from scratch.  See the OS X ld(1) and dyld(1) man pages for information
about how OS X handles symbol namespaces, as well as undefined and
multiply-defined symbols.])])

m4_nlist([dnl
m4_bold([When trying to use system-backed shared memory on OS X I see
failures about "too many open files".])

m4_p([dnl
The default number of shared memory segments on OS X is too low.  To fix
this problem, edit the file /etc/rc, changing the kern.sysv.shmmax and
kern.sysv.shmseg values as follows:])
m4_indent([dnl
*** /etc/rc.orig        Fri Dec 19 09:34:09 2003
--- /etc/rc     Fri Dec 19 09:33:53 2003
***************
*** 84,93 ****

   __OCT__ System tuning
   sysctl -w kern.maxvnodes=$(echo $(sysctl -n hw.physmem) '33554432 /
512 * 1024 +p'|dc)
! sysctl -w kern.sysv.shmmax=4194304
   sysctl -w kern.sysv.shmmin=1
   sysctl -w kern.sysv.shmmni=32
! sysctl -w kern.sysv.shmseg=8
   sysctl -w kern.sysv.shmall=1024
   if __LB__ -f /etc/sysctl-macosxserver.conf __RB__; then
         awk '{ if (!index($1, "__OCT__") && index($1, "=")) print $1 }' __LT__
/etc/sysctl-macosxserver.conf | while read
--- 84,93 ----

   __OCT__ System tuning
   sysctl -w kern.maxvnodes=$(echo $(sysctl -n hw.physmem) '33554432 /
512 * 1024 +p'|dc)
! sysctl -w kern.sysv.shmmax=134217728
   sysctl -w kern.sysv.shmmin=1
   sysctl -w kern.sysv.shmmni=32
! sysctl -w kern.sysv.shmseg=32
   sysctl -w kern.sysv.shmall=1024
   if __LB__ -f /etc/sysctl-macosxserver.conf __RB__; then
         awk '{ if (!index($1, "__OCT__") && index($1, "=")) print $1 }' __LT__
/etc/sysctl-macosxserver.conf | while read])

m4_p([dnl
and then reboot the system.])])

m4_nlistend

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