industrialNETworX

Hallo,
i get the following ERROR:

arm-hitex-elf-gcc.exe -c -mlong-calls -mcpu=arm926ej-s -fshort-enums -gdwarf-2 -Wall -O0 -mapcs -mthumb-interwork -D_NETX_HITOP_ -D__RCX__   -I.\Includes\ -I.\Lib\ -I.\Includes\API\ -I.\Includes\configuration\ -I.\Includes\Cpunetx\ -I.\Includes\TLR\ -o .\Output\Config_SimpleExample.o .\Sources\Config_SimpleExample.c 


arm-hitex-elf-as.exe -mcpu=arm926ej-s -gdwarf2 -mthumb-interwork  -I.\Includes\ -I.\Lib\ -I.\Includes\API\ -I.\Includes\configuration\ -I.\Includes\Cpunetx\ -I.\Includes\TLR\ -o .\Output\InitGnu.o .\Sources\InitGnu.s

arm-hitex-elf-gcc.exe -c -mlong-calls -mcpu=arm926ej-s -fshort-enums -gdwarf-2 -Wall -O0 -mapcs -mthumb-interwork -D_NETX_HITOP_ -D__RCX__   -I.\Includes\ -I.\Lib\ -I.\Includes\API\ -I.\Includes\configuration\ -I.\Includes\Cpunetx\ -I.\Includes\TLR\ -o .\Output\SimpleExample.o .\Sources\SimpleExample.c 

arm-hitex-elf-gcc.exe -c -mlong-calls -mcpu=arm926ej-s -fshort-enums -gdwarf-2 -Wall -O0 -mapcs -mthumb-interwork -D_NETX_HITOP_ -D__RCX__   -I.\Includes\ -I.\Lib\ -I.\Includes\API\ -I.\Includes\configuration\ -I.\Includes\Cpunetx\ -I.\Includes\TLR\ -o .\Output\helper.o .\Sources\helper.c 

arm-hitex-elf-ld.exe  -T.\netx_sdram.ld.tmp -static  -( -lrcx -lc -lm -lgcc -)  -Map=output/example.map  -o .\Output\LedX.elf 

./Lib/librcx.a(libc_mem_support.o): In function `libc_mem_init':

libc_mem_support.c:(.text+0x98): undefined reference to `_heap_start'

libc_mem_support.c:(.text+0xa0): undefined reference to `_heap_end'

./Lib/librcx.a(libc_mem_support.o):(.data+0x0): undefined reference to `_heap_end'

./Lib/librcx.a(libc_mem_support.o):(.data+0x4): undefined reference to `_heap_start'

?????