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Key difference between GCC arm-none-eabi and arm-eabi

techguyz

Hi Experts,

For Cortex R and M processors Linaro has recommended the GCC arm-none-eabi 4.9 whereas for A series processors it is recommending normal GCC eabi.

what is the key difference between the same ?

Regards,

Techguyz

Parents
  • 0 Arm Employee Badge in reply to Jerome Decamps - 杜尚杰

    I think the difference is calling convention and availability of system calls for the C library to use.

    With "arm-eabi-gcc" you have the Linux system C library which will make calls into the kernel IOCTLs, e.g. for allocating memory pages to the process.

    With "arm-eabi-none-gcc" you are running on platform which doesn't have an operating system at all - so the C library is different to cope with that.

    Other differences include how processes get bootstrapped by the runtime linker / loader (i.e. a lot happens at runtime on Linux, which cannot happen in a baremetal platform).

Reply
  • 0 Arm Employee Badge in reply to Jerome Decamps - 杜尚杰

    I think the difference is calling convention and availability of system calls for the C library to use.

    With "arm-eabi-gcc" you have the Linux system C library which will make calls into the kernel IOCTLs, e.g. for allocating memory pages to the process.

    With "arm-eabi-none-gcc" you are running on platform which doesn't have an operating system at all - so the C library is different to cope with that.

    Other differences include how processes get bootstrapped by the runtime linker / loader (i.e. a lot happens at runtime on Linux, which cannot happen in a baremetal platform).

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