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| author | Tim Kientzle <kientzle@FreeBSD.org> | 2010-10-09 05:31:08 +0000 |
|---|---|---|
| committer | Tim Kientzle <kientzle@FreeBSD.org> | 2010-10-09 05:31:08 +0000 |
| commit | 0e479ac8f7a2d846f5e73fb07d7504fedb89d653 (patch) | |
| tree | 2553e2bcd168f62d37e7f3fd998d5ea9a1b01f29 /usr.bin/ar/ar.1 | |
| parent | cf7d9a8ca86f4febb0a4d0d029474b4ec6b6706b (diff) | |
| download | src-0e479ac8f7a2d846f5e73fb07d7504fedb89d653.tar.gz src-0e479ac8f7a2d846f5e73fb07d7504fedb89d653.zip | |
Add -D (deterministic) option to ar.
When set, it forces all timestamps and owners to zero and
modes to 0644. Useful for producing libraries that are
bitwise identical across multiple build runs.
Submitted by: Erik Cederstrand
Reviewed by: Kai Wang
Notes
Notes:
svn path=/head/; revision=213643
Diffstat (limited to 'usr.bin/ar/ar.1')
| -rw-r--r-- | usr.bin/ar/ar.1 | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/usr.bin/ar/ar.1 b/usr.bin/ar/ar.1 index 3a8b75373aab..c64c7f64ac6e 100644 --- a/usr.bin/ar/ar.1 +++ b/usr.bin/ar/ar.1 @@ -62,6 +62,7 @@ .Op Fl a Ar position-after .Op Fl b Ar position-before .Op Fl c +.Op Fl D .Op Fl i Ar position-before .Op Fl j .Op Fl s @@ -179,6 +180,16 @@ from the archive specified by argument .Ar archive . The archive's symbol table, if present, is updated to reflect the new contents of the archive. +.It Fl D +When used in combination with the +.Fl r +or +.Fl q +option, insert 0's instead of the real mtime, uid and gid values +and 0644 instead of file mode from the members named by arguments +.Ar files ... . +This ensures that checksums on the resulting archives are reproducible +when member contents are identical. .It Fl f Synonymous with option .Fl T . |