sofware building error

Question

Hi!!

I am working with the Nios II IDE version 5.0 and trying to introduce a

software design into a Cyclone II DSP which FPGA is the EP2C35 that previously

has been hardware-programmed with a SOPC builder design.

Once I have opened a project(in my case count library) have tried to build it

and always have given the same problem:

make -s all

Compiling count_binary.c...

Linking count_binary_0.elf...

obj/count_binary.o(.text+0x3d8): In function `main':

../count_binary.c:324: undefined reference to `fopen'

collect2: ld returned 1 exit status

make: *** [count_binary_0.elf] Error 1

Build completed

Could anybody help me? I am totally desesperated!!

Thanks a lot

P.D:the fopen is for opening the device driver of a LCD

altera_forum · Answer

Hi ieup,  do you include the file which defines fopen?!  Cheers,  Danny

altera_forum · Answer

Yes I have a header file that has all the "includes" included  That is why I do not understand where the error is   Thanks for your answer  ieup

altera_forum · Answer

Hi ieup,

sounds like your linker does not refer to the std libraries.

In your project properties, C/C++ Build -> Tool Settings -> Linker -> General add 'c' to Libraries and the path to libc to Library Paths.

You could also try the compiler flag -fno-builtin-<function name> to tell the compiler to use fopen.

hope this helps,

--wolf

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