RTEMS 4.6.1 On-Line Library

Why can I not build RTEMS inside of the source tree?

RTEMS Frequently Asked Questions

The build-directory hierarchy is setup dynamically at configuration time.

Configuring inside of the source tree would prevent being able to configure for multiple targets simultaneously.

Using a separate build-tree simplifies Makefiles and configure scripts significantly.

Adaptation to GNU/Cygnus conventions.

RTEMS Frequently Asked Questions