This patch seems to have gone unnoticed, can somemone please review it? On Fri, Mar 27, 2020 at 6:48 PM utkarsh.ra...@gmail.com < utkarsh.ra...@gmail.com> wrote:
> --- > user/start/tools.rst | 34 ++++++++++++++++++++++++++++++++++ > 1 file changed, 34 insertions(+) > > diff --git a/user/start/tools.rst b/user/start/tools.rst > index c3f039b..8ea1f64 100644 > --- a/user/start/tools.rst > +++ b/user/start/tools.rst > @@ -3,6 +3,7 @@ > .. Copyright (C) 2019 embedded brains GmbH > .. Copyright (C) 2019 Sebastian Huber > .. Copyright (C) 2020 Chris Johns > +.. Copyright (C) 2020 Utkarsh Rai > > .. _QuickStartTools: > > @@ -76,3 +77,36 @@ source code used. > > > 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 cannot use their > distribution's > +cross-compiler for their target on rtems, e.g., the riscv64-linux-gnu or > the > +arm-none-eabi-gcc on RTEMS. 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. > + > + ``Threading in GCC support libraries -`` > + Several threading packages in GCC such as Go threads (libgo), OpenMP > + (libgomp), and OpenACC need to be customized according to RTEMS. > This is > + done by the RTEMS specific 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 > + ( > https://docs.rtems.org/branches/master/user/hardware/architectures.html?highlight=multilib > ). > + 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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