Are POSIX mqueues supposed to be functional on FreeBSD?

Andrew Thompson thompsa at
Mon Jun 21 00:06:16 UTC 2010

On 21 June 2010 10:11, Garrett Cooper <yanefbsd at> wrote:
> On Sun, Jun 20, 2010 at 3:06 PM, Stathis Kamperis <ekamperi at> wrote:
>> 2010/6/21 Garrett Cooper <yanefbsd at>:
>>>    Err... I ran an mqueue test and it popped up with ENOSYS. Which
>>> makes me wonder, are POSIX mqueues implemented 100% on FreeBSD? I
>>> looked into sys/kern/uip_mqueue.c and it _appears_ functional, but I
>> Hi,
>> did you first load the respective kernel module (mqueuefs or something
>> like that) ?
> Duh... should have checked that first I suppose: no, it isn't loaded.
> However, it doesn't appear to compile with my copy of src:
> # make -C /sys/modules/mqueue/ all install
> Warning: Object directory not changed from original /usr/src/sys/modules/mqueue
> cc -O2 -pipe -fno-strict-aliasing -pipe -O2 -march=nocona -Werror
> -D_KERNEL -DKLD_MODULE -nostdinc   -I. -I@ -I@/contrib/altq
> -finline-limit=8000 --param inline-unit-growth=100 --param
> large-function-growth=1000 -fno-common  -fno-omit-frame-pointer
> -mcmodel=kernel -mno-red-zone  -mfpmath=387 -mno-sse -mno-sse2
> -mno-sse3 -mno-mmx -mno-3dnow  -msoft-float
> -fno-asynchronous-unwind-tables -ffreestanding -fstack-protector
> -std=iso9899:1999 -fstack-protector -Wall -Wredundant-decls
> -Wnested-externs -Wstrict-prototypes  -Wmissing-prototypes
> -Wpointer-arith -Winline -Wcast-qual  -Wundef -Wno-pointer-sign
> -fformat-extensions -c
> /usr/src/sys/modules/mqueue/../../kern/uipc_mqueue.c
> /usr/src/sys/modules/mqueue/../../kern/uipc_mqueue.c:48:24: error:
> opt_compat.h: No such file or directory
> *** Error code 1
> Stop in /usr/src/sys/modules/mqueue.
> # find /usr/src/ -name opt_compat.h
> So I'll need to hunt down what's going on with the missing header.

opt_* headers are auto-generated by the kernel config. Just add
opt_compat.h to sys/modules/mqueue/Makefile right after opt_posix.h


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