Are POSIX mqueues supposed to be functional on FreeBSD?

Garrett Cooper yanefbsd at
Sun Jun 20 22:11:43 UTC 2010

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: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.

Thanks :),

More information about the freebsd-standards mailing list