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-
-.. _arm-gcc:
-
-GCC and libc
-============
-
-This document provides notes on using ``arm-none-eabi-gcc``, the
-`CodeSourcery <http://www.codesourcery.com/>`_ version of the GNU `GCC
-<http://gcc.gnu.org/>`_ compilers used for the Maple boards.  It is
-not intended as a reference manual for GCC; such manuals are available
-`elsewhere <http://gcc.gnu.org/>`_.
-
-.. contents:: Contents
-   :local:
-
-Obtaining ``arm-none-eabi-gcc``
--------------------------------
-
-Recent versions of ``arm-none-eabi-gcc`` and associated tools are
-included with the :ref:`Maple IDE <ide>`.
-
-Users who wish to use ``arm-none-eabi-gcc`` directly, along with a
-standard Unix Make-based toolchain, should read the
-:ref:`unix-toolchain`, which describes how to set up such an
-environment.
-
-LeafLabs maintains `mirrors
-<http://static.leaflabs.com/pub/codesourcery/>`_ for some of the more
-recent versions of the compiler, including versions for OS X, Win32,
-and 32-bit Linux.
-
-.. _arm-gcc-compiler-flags:
-
-Compiler Flags Used by libmaple
--------------------------------
-
-This section documents the flags passed to ``arm-none-eabi-gcc`` by
-the :ref:`Maple IDE <ide>` and the default Makefile provided with the
-:ref:`Unix toolchain <unix-toolchain>`.  The information in this
-section is subject to change between :ref:`libmaple <libmaple>`
-releases.
-
-.. highlight:: sh
-
-The following flags are among those passed to the C compiler::
-
-    -Os -g -mcpu=cortex-m3 -mthumb -march=armv7-m -nostdlib
-    -ffunction-sections -fdata-sections -Wl,--gc-sections
-
-In addition to those flags just given for the C compiler, the
-following flags are among those passed to the C++ compiler::
-
-    -fno-rtti -fno-exceptions -Wall
-
-The following flags are among those passed to the assembler::
-
-    -mcpu=cortex-m3 -march=armv7-m -mthumb
-
-.. highlight:: cpp
-
-.. _arm-gcc-libc:
-
-Using the C Standard Library
-----------------------------
-
-By default (under both the :ref:`Maple IDE <ide>` and the :ref:`Unix
-toolchain <unix-toolchain>`), ``arm-none-eabi-gcc`` is configured to
-link against `newlib <http://sourceware.org/newlib/>`_, a C standard
-library intended for use with embedded applications.  You are free to
-include of any of its headers.
-
-Be advised, however, that a variety of syscalls may only be partially
-implemented, if at all.  See the :ref:`libmaple` file syscalls.c and
-the newlib documentation for more details.
-
-.. _arm-gcc-avr-gcc:
-
-Switching from AVR-GCC
-----------------------
-
-This section, which is expected to grow over time, describes
-techniques for porting code which uses AVR-GCC features (AVR-GCC is
-the compiler used by many Atmel AVR-based microcontroller boards,
-including Arduino) for use on the Maple.
-
-.. _arm-gcc-attribute-flash:
-
-- Replacing ``PROGMEM``: If you need to store a lot of constant data,
-  you can store variables in Flash (instead of RAM) by using the
-  libmaple macro ``__FLASH__``.  Here's an example::
-
-      uint32 array[] __FLASH__ = {0, 1, 2};
-
-  This will help you save RAM when you need to store large amounts of
-  data, like look-up tables.
-
-  You can only store values which are compile-time constants (like
-  numbers and strings, and arrays of numbers and strings) in this way.
-  Also, if you try to change a variable stored in Flash, your program
-  will crash.
-
-  If you need to port over AVR/Arduino code that uses pgmspace.h,
-  these declarations may help you::
-
-      typedef const unsigned char prog_uchar;
-      #define pgm_read_byte_near(x) (*(prog_uchar*)x)
-      #define pgm_read_byte(x) (*(prog_uchar*)x)