Peter Simons 8b7f8b56f1 Added support for passing an (impure) NIX_BUILD_CORES variable to build expressions. ... This patch adds the configuration file variable "build-cores" and the command line argument "--cores". These settings specify the number of CPU cores to utilize for parallel building within a job, i.e. by passing an appropriate "-j" flag to GNU Make. The default value is 1, which means that parallel building is *disabled*. If the number of build cores is specified as 0 (synonymously: "guess" or "auto"), then the actual value is supposed to be auto-detected by builders at run-time, i.e by calling the nproc(1) utility from coreutils. The environment variable $NIX_BUILD_CORES is available to builders, but the contents of that variable does *not* influence the hash that goes into the $out store path, i.e. the number of build cores to be utilized can be changed at will without requiring any re-builds.		2010-06-23 14:34:08 +00:00
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Makefile.am	* Drop the dependency on the ATerm library.	2010-04-19 14:51:58 +00:00
shared.cc	Added support for passing an (impure) NIX_BUILD_CORES variable to build expressions.	2010-06-23 14:34:08 +00:00
shared.hh	* Templatise getIntArg / string2Int.	2009-11-24 12:26:25 +00:00