From c8a3dea847bb9f87fa1876d0c6c3356d6226f121 Mon Sep 17 00:00:00 2001 From: Leo Famulari Date: Thu, 30 Mar 2017 03:10:48 -0400 Subject: packages: Enable threaded compression of source tarballs. This provides a ~2x speedup when using 4 threads. * guix/packages.scm (patch-and-repack)[build]: Invoke xz with '--threads=0' when re-packing tarballs. --- guix/packages.scm | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'guix/packages.scm') diff --git a/guix/packages.scm b/guix/packages.scm index 61171b8342..29351ace1d 100644 --- a/guix/packages.scm +++ b/guix/packages.scm @@ -576,7 +576,12 @@ (define (first-file directory) #:fail-on-error? #t))))) (zero? (apply system* (string-append #+tar "/bin/tar") - "cvfa" #$output + "cvf" #$output + ;; The bootstrap xz does not support + ;; threaded compression (introduced in + ;; 5.2.0), but it ignores the extra flag. + (string-append "--use-compress-program=" + #+xz "/bin/xz --threads=0") ;; avoid non-determinism in the archive "--mtime=@0" "--owner=root:0" -- cgit v1.2.3