time problem

[fang zhengshu]

hi all,
I write a simple test example about time function.but when I use the
"time()" function,the code can not be compiled correctly.
I just have include the <time.h>,any question?
the error I put following:
l4 at 192:~/tudos/l4/pkg/test_fifo/examples/client$ make
PWD=/home/l4/tudos/build/pkg/test_fifo/examples/client/OBJ-x86_586-l4v2
make  -C /home/l4/tudos/build/pkg/test_fifo/examples/client/OBJ-x86_586-l4v2
-f Makefile
make[1]: Entering directory
`/home/l4/tudos/build/pkg/test_fifo/examples/client/OBJ-x86_586-l4v2'
  ... Compiling main.o
  LD_PRELOAD=/home/l4/tudos/build/tool/gendep/libgendep.so
GENDEP_TARGET=main.o GENDEP_BINARY=cc1   gcc -m32 -c     -DUSE_UCLIBC=y
-DRAM_BASE=0x0    -DSYSTEM_x86_586_l4v2 -DARCH_x86 -DCPUTYPE_586
-DL4API_l4v2 -DCONFIG_L4_CALL_SYSCALLS -DCONFIG_L4_ABS_SYSCALLS
-I/home/l4/tudos/build/pkg/test_fifo/idl/OBJ-x86-l4v2
-I/home/l4/tudos/build/include/x86/l4v2 -I/home/l4/tudos/build/include/l4v2
-I/home/l4/tudos/build/include/x86 -I/home/l4/tudos/build/include
-I/home/l4/tudos/l4/../dice/include -I/home/drops/include/x86/l4v2
-I/home/drops/include/l4v2 -I/home/drops/include/x86 -I/home/drops/include
-nostdinc -I/home/l4/tudos/build/include/x86/uclibc
-I/home/l4/tudos/build/include/uclibc
-I/home/l4/tudos/build/include/uclibc++ -I/home/drops/include/x86/uclibc
-I/home/drops/include/uclibc -I/home/drops/include/uclibc++
-I/usr/lib/gcc/i486-linux-gnu/4.2.4/include
-I/usr/lib/gcc/i486-linux-gnu/4.2.4/include-fixed -gstabs+      -g -O2
-fno-strict-aliasing  -march=i586 -Wall -Wstrict-prototypes
-Wmissing-prototypes -Wmissing-declarations  -fno-common
-fno-stack-protector /home/l4/tudos/l4/pkg/test_fifo/examples/client/main.c
-o main.o
    ==> Linking test_fifo-client
    LD_PRELOAD=/home/l4/tudos/build/tool/gendep/libgendep.so
GENDEP_TARGET=test_fifo-client GENDEP_BINARY=ld  GENDEP_BINARY_ALT1=ld ld -m
elf_i386 -o test_fifo-client /home/l4/tudos/build/lib/x86_586/crt0.o main.o
test-client.o -Ttext=0x1100000 --hash-style=sysv
-L/home/l4/tudos/build/lib/x86_586/l4v2 -L/home/l4/tudos/build/lib/x86_586
-L/home/l4/tudos/build/lib -L/home/drops/lib/x86_586/l4v2
-L/home/drops/lib/x86_586 -L/home/drops/lib
-T/home/l4/tudos/build/lib/x86_586/main_stat.ld   -static -lgeneric_ts
-ll4env -ll4rm -ldm_generic -ldm_mem -lthread -lsemaphore
-llogserver_capsule -lnames -ll4util_root -ll4util -lsigma0 -lroot -ll4env
-ll4env_err -ll4rm -ldm_generic -ldm_mem -lthread -lslab -ll4sys -nostdlib
-luc_c -luclibc_support -u mmap_anon -lc_be_simple_mem -lc_be_mmap
-lc_be_mmap_util -lc_be_l4env_start_stop -lc_be_minimal_log_io
-luc_be_simple_sleep -ll4env -llogserver_capsule -ll4rm -ldm_generic
-ldm_mem -lthread -lgeneric_ts -luc_c
/usr/lib/gcc/i486-linux-gnu/4.2.4/libgcc.a -luc_c -ll4sys -Ttext=0x1100000
--warn-common -gc-sections
    main.o: In function `main':
    /home/l4/tudos/l4/pkg/test_fifo/examples/client/main.c:36: undefined
reference to `time'
    /home/l4/tudos/l4/pkg/test_fifo/examples/client/main.c:40: undefined
reference to `time'
    /home/l4/tudos/l4/pkg/test_fifo/examples/client/main.c:36: undefined
reference to `time'
    make[1]: *** [test_fifo-client] Error 1
    make[1]: Leaving directory
`/home/l4/tudos/build/pkg/test_fifo/examples/client/OBJ-x86_586-l4v2'
    make: ***
[/home/l4/tudos/build/pkg/test_fifo/examples/client/OBJ-x86_586-l4v2] Error
2


I have search the same error in l4-hackers ,someone suggest use rtc server,I
think it's a good idea.but I have found that the time() function  in
time.h,why the error will happen?
The reason I just include time.h?

Thank you!

-- 
fang,
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