[lwip-users] lwippools.h, building error with memp.h

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hi all

i am using lwip1.4.1_v1_5 from a  xilinx contrib,now i got exatly the same compile error as this post:

http://lists.nongnu.org/archive/html/lwip-users/2010-08/msg00073.html 

and i have nothing to add

i read the replis,someone said may be some compiler not strong enough for the  C preprocessor,but i am using arm-none-eabi-gcc:

gcc version 4.9.2 20140904 (prerelease) (crosstool-NG linaro-1.13.1-4.9-2014.09 - Linaro GCC 4.9-2014.09) ,i think should be ok.

so how to solve the promblem?or any clues?or what compiler can make this right?

thanks for attention

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