make erro when port app

hi:

The app source code have a misc.c.

In the file define : "static int strnlen(char_t *s, unsigned int n);"

but nios2-uclibc previous declaration it.

nios2-linux-uclibc-gcc -c -o ../misc.o -g -Wall -DWEBS -DUEMF -DOS="LINUX" -DLINUX -Dfork=vfork -D__uClinux__ -DUSER_MANAGEMENT_SUPPORT -DDIGEST_ACCESS_SUPPORT -I.. ../misc.c

../misc.c:61: error: conflicting types for 'strnlen'

/home/alex/buildroot/build_nios2/staging_dir/bin-ccache/../lib/gcc/nios2-linux-uclibc/3.4.5/../../../../nios2-linux-uclibc/sys-include/string.h:254: error: previous declaration of 'strnlen' was here

../misc.c:61: error: conflicting types for 'strnlen'

/home/alex/buildroot/build_nios2/staging_dir/bin-ccache/../lib/gcc/nios2-linux-uclibc/3.4.5/../../../../nios2-linux-uclibc/sys-include/string.h:254: error: previous declaration of 'strnlen' was here

make: *** [../misc.o] 错误 1

[alex@localhost LINUX]$

Then I commented the define and funcntion in misc.c

//static int strnlen(char_t *s, unsigned int n);

/******************************************************************************/

/*

* Return the length of a string limited by a given length

*/

//static int strnlen(char_t *s, unsigned int n)

//{

// unsigned int len;

// len = gstrlen(s);

// return min(len, n);

//}

Then I make again. Make success.

But I worry about I comment it is not correct.