[PATCH 16/16] This patch provides usage of RTEMS cross-compiler over GCC cross-compiler

[Gedare Bloom]

Hi Utkarsh,

Please squash/fixup your patches to send a patch (set) that modifies
the existing repository.

For more, read about "git rebase interactive" mode.

Thanks,
Gedare

On Tue, Mar 24, 2020 at 4:21 AM utkarsh.rai60 at gmail.com
<utkarsh.rai60 at gmail.com> wrote:
>
> ---
>  user/start/tools.rst | 35 +++++++++++++++++++++++++----------
>  1 file changed, 25 insertions(+), 10 deletions(-)
>
> diff --git a/user/start/tools.rst b/user/start/tools.rst
> index 92e99c8..3a6da3a 100644
> --- a/user/start/tools.rst
> +++ b/user/start/tools.rst
> @@ -79,17 +79,32 @@ Add ``--verbose`` to the GCC command for the the verbose version details.
>
>  Need for RTEMS-Specific Cross-Compiler
>  --------------------------------------------
> -  New users are often confused as to why they can't use their distribution's cross-compiler for their target on rtems, e.g.,the riscv64-linux-gnu or the arm-none-eabi-gcc. Below mentioned are some of the reasons for using the RTEMS cross-compiler.
>
> - ``Correct configuration of newlib`` -
> -    Newlib is a C standard library implementation intended for use on embedded systems. Most of the POSIX and libc support for RTEMS is derived from newlib. The RTEMS cross-compiler configures newlib correctly for RTEMS.
> +New users are often confused as to why they can't use their distribution's
> +cross-compiler for their target on rtems, e.g.,the riscv64-linux-gnu or the
> +arm-none-eabi-gcc. Below mentioned are some of the reasons for using the RTEMS
> +cross-compiler.
>
> - ``Threading in GCC support libraries`` -
> -    GCC support threading libraries such as ``pthread.h`` provide threading support to an application; these libraries are tailored according to RTEMS using the RTEMS cross-compiler.
> -
> - ``Provide preprocessor define __rtems__`` -
> -    The ``__rtems__`` preprocessor define is used to provide conditional code compilation in source files that are shared with other projects e.g. in newlib or imported code from freebsd.
> + ``Correct configuration of newlib`` -
> + Newlib is a C standard library implementation intended for use on embedded
> + systems. Most of the POSIX and libc support for RTEMS is derived from newlib.
> + The RTEMS cross-compiler configures newlib correctly for RTEMS.
>
> - ``Multilib variants to match the BSP``-
> -    RTEMS configures GCC to create separate runtime libraries for each supported instruction set, floating point unit, vector unit, word size (e.g. 32-bit and 64-bit), endianness, ABI, processor errata workarounds,and so on in the architecture. These libraries are termed multilib variants. Multilibs variants to match the BSP are set by selecting a specific set of machine options using the RTEMS cross-compiler.
> + ``Threading in GCC support libraries`` -
> + GCC support threading libraries such as ``pthread.h`` provide threading support
> + to an application; these libraries are tailored according to RTEMS using the
> + RTEMS cross-compiler.
> +
> + ``Provide preprocessor define __rtems__`` -
> + The ``__rtems__`` preprocessor define is used to provide conditional code
> + compilation in source files that are shared with other projects e.g. in newlib
> + or imported code from freebsd.
> +
> + ``Multilib variants to match the BSP``-
> + RTEMS configures GCC to create separate runtime libraries for each supported
> + instruction set, floating point unit, vector unit, word size (e.g. 32-bit and
> + 64-bit), endianness, ABI, processor errata workarounds,and so on in the
> + architecture. These libraries are termed multilib variants. Multilibs variants
> + to match the BSP are set by selecting a specific set of machine options using
> + the RTEMS cross-compiler.
>
> --
> 2.17.1
>
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