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* New configuration setting `build-max-jobs' which sets the default

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for the `-j' flag (i.e., the maximum number of jobs to execute in
  parallel).  Useful on multi-processor machines.
This commit is contained in:
Eelco Dolstra 2006-08-10 20:19:13 +00:00
parent 3e239a37ff
commit d19b6521fc
2 changed files with 17 additions and 0 deletions
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10
nix.conf.example
View file

@ -68,6 +68,16 @@
#env-keep-derivations = false #env-keep-derivations = false
### Option `build-max-jobs'
#
# This option defines the maximum number of jobs that Nix will try to
# build in parallel. The default is 1. You should generally set it
# to the number of CPUs in your system (e.g., 2 on a Athlon 64 X2).
# It can be overriden using the `--max-jobs' / `-j' command line
# switch.
#build-max-jobs = 1
### Option `build-allow-root' ### Option `build-allow-root'
# #
# This option controls Nix's behaviour when it is invoked under the # This option controls Nix's behaviour when it is invoked under the

7
src/libmain/shared.cc
View file

@ -94,7 +94,14 @@ static void initAndRun(int argc, char * * argv)
nixConfDir = canonPath(getEnv("NIX_CONF_DIR", NIX_CONF_DIR)); nixConfDir = canonPath(getEnv("NIX_CONF_DIR", NIX_CONF_DIR));
nixLibexecDir = canonPath(getEnv("NIX_LIBEXEC_DIR", NIX_LIBEXEC_DIR)); nixLibexecDir = canonPath(getEnv("NIX_LIBEXEC_DIR", NIX_LIBEXEC_DIR));
/* Get some settings from the configuration file. */
thisSystem = querySetting("system", SYSTEM); thisSystem = querySetting("system", SYSTEM);
{
int n;
if (!string2Int(querySetting("build-max-jobs", "1"), n) || n < 0)
throw Error("invalid value for configuration setting `build-max-jobs'");
maxBuildJobs = n;
}
/* Catch SIGINT. */ /* Catch SIGINT. */
struct sigaction act, oact; struct sigaction act, oact;