On Sun, Mar 22, 2020 at 11:33 AM utkarsh.ra...@gmail.com <utkarsh.ra...@gmail.com> wrote: > > Really sorry for a new patch, I somehow rm -rf'ed my machine's root Oh no!
> --- > user/start/tools.rst | 16 ++++++++++++++++ > 1 file changed, 16 insertions(+) > > diff --git a/user/start/tools.rst b/user/start/tools.rst > index c3f039b..3bb939e 100644 > --- a/user/start/tools.rst > +++ b/user/start/tools.rst > @@ -76,3 +76,19 @@ 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 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. Fix line length (text width) should be <= 80 characters. > + > + ``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 > > _______________________________________________ > devel mailing list > devel@rtems.org > http://lists.rtems.org/mailman/listinfo/devel _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
