= BuildingRTEMS =


The primary source of information about building and configuring RTEMS is '''always''' the '''''Getting Started''''' manual for the RTEMS version you are using (see http://www.rtems.com/onlinedocs.html.  This section contains answers to some frequently asked questions.
= Required Tools =


 * Which tools are required to build RTEMS?
 * Do I need autoconf and automake to build RTEMS?
 * Do I need a native gcc on my host?
 * Can I use a non-gcc cross-toolchain?
 * Where to get autoconf automake ld gcc etc.?
 * [wiki:BuildToolRPMPackages Building the Tool RPM packages]
= Issues when building RTEMS =


 * When running ./configure weird thing start to happen
 * When running bootstrap weird thing start to happen
 * configure xxx cannot create executables
 * Why can I not build RTEMS inside of the source tree?
 * Which environment variables to set?
 * Compiler /Assembler /Linker report errors
 * How to set up $PATH?
 * Can I build RTEMS Canadian Cross?
 * Building RTEMS is slow
 * Building my pre-4.5.x BSPs does not work anymore

Get rest from build45.t in FAQ and continue.
= Issue relating to Debuging and Building =


 * Does building with `make VARIANT=DEBUG' cause RTEMS_DEBUG to get defined?
No.

 * How do I cause RTEMS_DEBUG to get defined
In newer snapshots it's --enable-rtems-debug.
In older versions you had to define it inside the target-opts
section in your BSP's <BSP>.cfg.

 * What exactly does VARIANT=debug do?
Builds with less optimisation

 * What does RTEMS_DEBUG do?
Enables debug checks inside the RTEMS kernel, including
memory heap walking.