nix-super/bootstrap.sh

#! /bin/sh -e
rm -f aclocal.m4
mkdir -p config
exec autoreconf -vfi
* A script to generate the Auto* stuff. 2004-07-30 16:45:13 +03:00			`#! /bin/sh -e`
* Use SQLite 3.7.0's write-ahead logging (WAL mode). This is a lot faster than the old mode when fsyncs are enabled, because it only performs an fsync() when doing a checkpoint, rather than at every commit. Some timings for doing a "nix-instantiate /etc/nixos/nixos -A system" after modifying the stdenv setup script: 42.5s - SQLite 3.6.23 with truncate mode and fsync 3.4s - SQLite 3.6.23 with truncate mode and no fsync 32.1s - SQLite 3.7.0 with truncate mode and fsync 16.8s - SQLite 3.7.0 with WAL mode and fsync, auto-checkpoint every 1000 pages 8.3s - SQLite 3.7.0 with WAL mode and fsync, auto-checkpoint every 8192 pages 1.7s - SQLite 3.7.0 with WAL mode and no fsync The default is now to use WAL mode with fsyncs. Because WAL doesn't work on remote filesystems such as NFS (as it uses shared memory), truncate mode can be re-enabled by setting the "use-sqlite-wal" option to false. 2010-08-04 20:35:59 +03:00			`rm -f aclocal.m4`
* Build dynamic libraries. 2005-07-22 17:52:45 +03:00			`mkdir -p config`
bootstrap: Simplify & make more robust. 2011-09-06 15:11:05 +03:00			`exec autoreconf -vfi`