Various system wide constants are specified within the newlib directory in libc/include/sys/config.h.

Very often the system default values are quite sufficient (this is the case for the OpenRISC 1000 ). However target specific overrides of these values can be provided at the end of this file. This file is included in all other source files, so can be used to redefine any of the constants used in the system. The existing file gives numerous examples from different machines.

	Caution
	A number of the constants defined here mirror those in GCC's limits.h file. They should be kept consistent.