UDP problems with Xilinx EDK 7.1

Hi All,

I am having some problems using UDP LwIP calls in EDK7.1. Let me give
some details. I am trying to create an Ethernet bridge using the Memec
V4LX60MB board. The board has a 10/100 Ethernet PHY connected to a
Virtex-4 LX60 FPGA. I have the EDK project from Xilinx appnote XAPP663
as a starting point. After changing the pinouts and SRAM to match the
Memec board, I can get this project to work (a simple Telnet echo
server). Now, I want to change out the TCP calls with (simpler) UDP
calls so that I can unicast streaming video to the board and have it in
turn stream this out to a different IP address. I am using the RawAPI
LwIP calls (no OS running on the Microblaze). When I attempt to compile
the appication in the EDK I the following errors:

mb-gcc -O2 code/udp_echo_main.c -o udp_echo/executable.elf \
-Wl,-defsym -Wl,_TEXT_START_ADDR=0x86000000 -mno-xl-soft-mul
-mxl-barrel-shift -mno-xl-soft-div -Wl,-T -Wl,udp_echo_linker_script
-I./microblaze_0/include/ -L./microblaze_0/lib/ \
-xl-mode-executable \
-llwip4
/cygdrive/c/DOCUME~1/westra/LOCALS~1/Temp/1/ccsNdu71.o: In function
`main_main':
/cygdrive/c/DOCUME~1/westra/LOCALS~1/Temp/1/ccsNdu71.o(.text+0x880):
undefined reference to `udp_new'
/cygdrive/c/DOCUME~1/westra/LOCALS~1/Temp/1/ccsNdu71.o(.text+0x89c):
undefined reference to `udp_recv'
/cygdrive/c/DOCUME~1/westra/LOCALS~1/Temp/1/ccsNdu71.o(.text+0x8b4):
undefined reference to `udp_bind'
./microblaze_0/lib//libxil.a(
microblaze_interrupts_g.o)(.data+0x0):/cygdrive/d/OSD27/Firmware/JW_EMAC/microblaze_0/libsrc/standalone_v1_00_a/src/microblaze_interrupts_g.c:
undefined reference to `mytimer_int_handler'
collect2: ld returned 1 exit status
make: *** [udp_echo/executable.elf] Error 1

Upon inspection of the library file (liblwip4.a), there seems to be no
sign of the rawapi UDP functions (though the TCP functions seem to be
there).

Is anyone familiar with using LwIP with Microblaze? Are the RawAPI UDP
calls not supported? Is there a work-around to this problem?

Any help would be appreciated. Thanks.

Jeff

I changed the version of LwIP that I was using from 1.00 to 2.00 and
that seems to have fixed the problem.