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By changing RELSTR= into RELSTR:= we force Make to evaluate the Git version string only during Makefile read, and not on every single build command execution. The reduction in file system I/O cut the time to build examples/er-rest-example on my development machine by a significant amount, see below. Core i7 notebook with ext4 file system on an SSD (building for TARGET=mulle): "RELSTR=" make 19.70s user 1.07s system 82% cpu 25.291 total "RELSTR:=" make 11.81s user 1.27s system 79% cpu 16.499 total Signed-off-by: Joakim Gebart <joakim.gebart@eistec.se>
The Contiki Operating System
Contiki is an open source operating system that runs on tiny low-power microcontrollers and makes it possible to develop applications that make efficient use of the hardware while providing standardized low-power wireless communication for a range of hardware platforms.
Contiki is used in numerous commercial and non-commercial systems, such as city sound monitoring, street lights, networked electrical power meters, industrial monitoring, radiation monitoring, construction site monitoring, alarm systems, remote house monitoring, and so on.
For more information, see the Contiki website: