[RTOS Support] Errors while building example 15

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Errors while building example 15

Posted by nagaraju on August 13, 2013

Hi ,
When i try to build the example15 from the real time kernel practical guide.
I am getting the following errors please clarify me.
I am building the examples with arm-none-linux-eabi-gcc.

/firma/nagaraju/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin/../lib/gcc/arm-none-eabi/4.6.3/../../../../arm-none-eabi/lib/thumb2/libc.a(lib_a-writer.o): In function `_write_r':
writer.c:(.text+0x16): undefined reference to `_write'
/firma/nagaraju/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin/../lib/gcc/arm-none-eabi/4.6.3/../../../../arm-none-eabi/lib/thumb2/libc.a(lib_a-closer.o): In function `_close_r':
closer.c:(.text+0x12): undefined reference to `_close'
/firma/nagaraju/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin/../lib/gcc/arm-none-eabi/4.6.3/../../../../arm-none-eabi/lib/thumb2/libc.a(lib_a-lseekr.o): In function `_lseek_r':
lseekr.c:(.text+0x16): undefined reference to `_lseek'
/firma/nagaraju/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin/../lib/gcc/arm-none-eabi/4.6.3/../../../../arm-none-eabi/lib/thumb2/libc.a(lib_a-readr.o): In function `_read_r':
readr.c:(.text+0x16): undefined reference to `_read'
collect2: ld returned 1 exit status
make: *** [Maschinen_Simulation.axf] Error 1

Thanks,
Nagaraju

RE: Errors while building example 15

Posted by nagaraju on August 13, 2013

Please clarify me how to resolve the above errors

RE: Errors while building example 15

Posted by Richard on August 13, 2013

Looks like the C libraries you are using require you to provide the implementation of some helper functions. I guess you are using newlib?

Does the 'linux' in the compiler name mean it runs or Linux, or builds for Linux. If it builds for Linux then it is not a compiler that can be used with FreeRTOS.

Regards.

RE: Errors while building example 15

Posted by nagaraju on August 14, 2013

I am building the example programmes with arm-none-eabi-gcc tool-chain. Please suggest me which version of libc i have to use for compiling.

I have used following lib for compiling the source.
http://ftp.gnu.org/gnu/libc/glibc-2.18.tar.bz2

RE: Errors while building example 15

Posted by Dave on August 14, 2013

That looks like a Linux library. Are you able to build the complete projects following the instructions in the book, with the tools described in the book?