build failed: cpukit/posix/src/conddefaultattributes.c

[printk]

Hi, I followed this to build the bsp, arm920
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	be built to target the BOARD_SUPPORT_PACKAGE board.
	mkdir build-rtems
	cd build-rtems
	../rtems-4.10.0/configure --target=<TARGET_CONFIGURATION> \
	--disable-posix --disable-networking --disable-cxx \
	--enable-rtemsbsp=<BOARD_SUPPORT_PACKAGE>\
	--prefix=<INSTALL_POINT>
	make all
	make install
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$ cd rtems
$ mkdir arm920
$ cd arm920
$ ../configure --target=arm-rtems4.12
$ make RTEMS_BSP="arm920"

it fails here:
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arm-rtems4.12-gcc --pipe -DHAVE_CONFIG_H   -I.. -I../../cpukit/../../../arm920/lib/include   -mcpu=arm920 -O2 -g -ffunction-sections -fdata-sections -Wall -Wmissing-prototypes -Wimplicit-function-declaration -Wstrict-prototypes -Wnested-externs -MT src/libposix_a-conddefaultattributes.o -MD -MP -MF src/.deps/libposix_a-conddefaultattributes.Tpo -c -o src/libposix_a-conddefaultattributes.o `test -f 'src/conddefaultattributes.c' || echo '../../../../../../c/src/../../cpukit/posix/'`src/conddefaultattributes.c
../../../../../../c/src/../../cpukit/posix/src/conddefaultattributes.c:31:3: error: unknown field 'clock' specified in initializer
   .clock          = CLOCK_REALTIME,
   ^
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I find this breaks many other bsps too, I comment this line out, then I can compile all other arm bsps.(about 20hours, 20G :D)
did I do something wrong?

btw, there are many sources include this file
 #include <sys/tree.h>
but i can not find this file by:
 find -name tree.h
where is this file?

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duhuanpeng