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Software Application Development time.h problem
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Related

time.h problem

Former Member
Former Member over 12 years ago

Hi everyone,
I am working on a project using ZedBoard. I have some problems regrading to the ZedBoard with Xilinx EDK.
I am trying to use timing of the system using gettimeofday()/time() function in the time.h. However, I cannot compile the C code. I got an error message like:

gettimeofdayr.c:(.text+0x20): undefined reference to `_gettimeofday'
collect2: ld returned 1 exit status
make: *** [inverter_test.elf] Error 1

I compiled the code in Visual Studio, it worked. I was wondering if the zedboard supports the timing function in standalone mode. My OS is windows 7 with Xilinx EDK 14.3.

Thank you very much.

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  • Former Member
    0 Former Member over 12 years ago

    Hi

    gettimeofday() is in <sys/time.h>, if you include that it should work.

    Matthew

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  • Former Member
    0 Former Member over 12 years ago in reply to Former Member

    I did included the sys/time.h. I still could not compile it.

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  • Former Member
    0 Former Member over 12 years ago

    Strange, it compiles fine for me.  Are you compiling for standalone target or linux?  I don't think you can use gettimeofday without an OS.

    Matthew

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  • Former Member
    0 Former Member over 12 years ago in reply to Former Member

    Thanks for the reply, Matthew.

    I am compiling for standalone. Is that means that I need to run linux on it and run my code from there?

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  • Former Member
    0 Former Member over 12 years ago

    Yes, you will need to run your program in Linux on the board.  Change your project's build settings to use arm-xilinx-linux-gnueabi-gcc instead of arm-xilinx-eabi-gcc and you won't need to make a new project.

    Matthew 

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  • Former Member
    0 Former Member over 12 years ago in reply to Former Member

    I have a similar problem and followed your advice, but now I keep getting errors in the linking process. "cannot find -l-Wl,--start-group,-lxil,-lgcc,-lc,--end-group". No idea what to do here.

    I changed build settings as you specified under the assembler, compiler, and linker settings. That didn't work. Also switched current toolchain to Xilinx ARM GNU/Linux Toolchain using GNU make. 

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  • Former Member
    0 Former Member over 12 years ago in reply to Former Member

    and when I get rid of that junk on the build settings, it tells me "required section '.got' not found in the linker script"

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  • Former Member
    0 Former Member over 11 years ago

    Whenever you use "Change Referenced BSP" in the project's context menu, the Xilinx tools will add "-l-Wl,--start-group,-lxil,-lgcc,--lc,-end-group" as a single entry to the "Libraries" section in "Paths and Symbols". This is actually quite hacky and fails as soon as you change certain project properties. To fix that you will have to remove those groups and hit "Change Referenced BSP" again.

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