Build Flags

There are a couple of flags you can use to statically modify RIOT's behavior or to enable/disable certain features.

Usage Example:

QUIET=1 CFLAGS="-DSCHEDSTATISTICS -DDEVELHELP" make clean all

General

• CFLAGS=-DSCHEDSTATISTICS - enable gathering and display of scheduler statistics
• CFLAGS=-DDEVELHELP - enable certain code sections useful for development
• CFLAGS=-DSCHED_TEST_STACK - enable (simple) testing for stack overflows
• RIOT_VERSION=foo - build a tagged version of RIOT
• RIOT_VERSION_OVERRIDE - override the version string - useful for comparing build sizes (available once https://github.com/RIOT-OS/RIOT/pull/3035 is merged)

Make Specific

• QUIET=1 / QUIET=0 - enable/disable hiding of compiler invocations

Platform Specific

native

• CFLAGS=-DNATIVE_AUTO_EXIT - terminate the native process after the last RIOT thread has exited.

Cortex-M based

(available once https://github.com/RIOT-OS/RIOT/pull/3119 is merged)

• TOOLCHAIN=gnu - build with GNU toolchain (GCC, binutils etc), this is the default
• TOOLCHAIN=llvm - build with LLVM/Clang (some binutils tools are still required)

Module Specific

transceiver

• CFLAGS=-DDBG_IGNORE - enable the transceivers ignore command (useful for debugging)