mirror of
https://gitlab.rtems.org/rtems/rtos/rtems.git
synced 2026-08-19 10:43:01 +08:00
Sebastian Huber
28588dcc59
Query the GCC build key and check it against the required value. There are dependencies between the RTEMS sources and external interfaces provided by Newlib and GCC. For example, POSIX API interfaces may change due to POSIX standard updates. The GCC build key is used to provide an indication that the present tools meet the requirements of the RTEMS sources. Add the GCC_BUILD_KEY_POLICY build option to define the checking policy. The GCC build key policy defines how the build key of the present compiler is checked against the required build key. While the policy is "ERROR", if the GCC build key has not the expected value, then the build configuration process produces a fatal error. While the policy is "WARNING", if the GCC build key has not the expected value, then the build configuration process produces a warning message. While the policy is "IGNORE", the GCC build key is not checked at all. The default policy is "WARNING". Close #5521. Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
Real-Time Executive for Multiprocessing Systems
RTEMS is a real-time executive (kernel) which provides a high performance environment for embedded applications with the following features:
- Standards based user interfaces.
- Multitasking capabilities.
- Homogeneous and heterogeneous multiprocessor systems.
- Symmetric Multiprocessing (SMP):
- Cluster scheduling: Job-level fixed prority scheduler (EDF) with support for one-to-one and one-to-all thread to processor affinities.
- Locking protocols with transitive priority inheritance, priority ceiling, MRsP and OMIP.
- Event-driven, priority-based, preemptive scheduling.
- Scalable timer and timeout support.
- Optional rate monotonic scheduling.
- Intertask communication and synchronisation.
- Priority inheritance.
- Responsive interrupt management.
- Dynamic memory allocation.
- Dynamic code loading using run-time link editing.
- File systems, IMFS, FAT, RFS, JFFS, NSFv4 (with LibBSD)
- High level of user configurability.
- Link-time configurable schedulers.
- Linker-set based initialization (similar to global C++ constructors).
- Drivers for I2C, SPI and LibBSD has NIC, USB, SD/MMC and Framebuffer.
- Open source with a friendly user license.
RTEMS Project:
Project git repositories are located at:
Online documentation is available at:
RTEMS Doxygen for CPUKit:
RTEMS POSIX 1003.1 Compliance Guide:
RTEMS Discourse User forum for questions, answers and examples:
RTEMS Discord for support:
RTEMS Mailing Lists for general purpose use the users list and for developers use the devel list.
The version number for this software in releases is located in the VERSION file if present.