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

[utkarsh.rai60 at gmail.com]

---
 user/start/tools.rst | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/user/start/tools.rst b/user/start/tools.rst
index c3f039b..8a1f393 100644
--- a/user/start/tools.rst
+++ b/user/start/tools.rst
@@ -76,3 +76,28 @@ source code used.
 
 
 Add ``--verbose`` to the GCC command for the the verbose version details.
+
+RTEMS cross-compiler over GCC cross-compiler
+--------------------------------------------
+    The new users are often confused as to why they can't use their distributions cross-compiler for their target on rtems, e.g., 
+    the riscv64-linux-gnu or the arm-none-eabi-gcc.Below mentioned are some 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 supported libraries`` -
+    GCC supported 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 genarally used to include rtems 
+    specific libraries.This preprocessor define is provided by the RTEMS cross-compiler at the compile time.
+
+ ``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), endianess,
+    code model, ABI, processor errata workarounds, and so on in the architecture. This is termed 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