GNU Arm Embedded Toolchain

Implementing _gettimeofday on Zynq

Asked by JS

I'm compiling for the Zynq chip using CodeSourcery Lite, and when I include <time.h> and reference the time() function, the linker complains that it can't find _gettimeofday:

~/CodeSourcery/bin/../lib/gcc/arm-none-eabi/4.3.3/../../../../arm-none-eabi/lib/libc.a(lib_a-gettimeofdayr.o): In function `_gettimeofday_r':
gettimeofdayr.c:(.text+0x1c): undefined reference to `_gettimeofday'
collect2: ld returned 1 exit status

How do I give it a _gettimeofday function to use for getting the system timer ticks? This seems to be a deficiency with CodeSourcery Lite, as I don't have a problem when compiling using Xilinx tools.

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Terry Guo (terry.guo) said : 		#1

Sorry that we don't provide support to CodeSourcery Lite. I recommend you to try out tool chain released in this website. At least we do have this function:

terguo01@terry-pc01:/work/terguo01/tools$ ./gcc-arm-none-eabi-4_8-2014q2/bin/arm-none-eabi-nm ./gcc-arm-none-eabi-4_8-2014q2/arm-none-eabi/lib/libc.a | grep _gettimeofday
         U _gettimeofday
00000000 T _gettimeofday_r
         U _gettimeofday_r
         U _gettimeofday_r

If you run into any problem, feel free to raise it. We are happy to provide support.

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