[FFmpeg-devel] [PATCH] configure: use ar and ranlib in deterministic mode

James Almer jamrial at gmail.com
Mon Jan 26 23:08:42 CET 2015


On 26/01/15 7:04 PM, Michael Niedermayer wrote:
> On Mon, Jan 26, 2015 at 09:56:03PM +0100, Michael Niedermayer wrote:
>> On Wed, Jan 21, 2015 at 11:14:06PM +0100, Andreas Cadhalpun wrote:
>>> Hi,
>>>
>>> ar and ranlib add timestamp and uid/gid for the object files in
>>> static libraries.
>>> If used in deterministic mode, these are set to zero, making the
>>> binaries reproducible.
>>> Attached patch achieves that.
>>>
>>> Best regards,
>>> Andreas
>>
>>>  configure |    4 ++--
>>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>> cc82891432d19e330d65ab717fd2722ab3304ecc  configure-use-ar-and-ranlib-in-deterministic-mode.patch
>>> From 1dfc47cb27ae6f3d88b8b7ca690b980842003ee7 Mon Sep 17 00:00:00 2001
>>> From: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>
>>> Date: Wed, 21 Jan 2015 22:32:58 +0100
>>> Subject: [PATCH] configure: use ar and ranlib in deterministic mode
>>>
>>> this makes the static libraries binary reproducible
>>
>> applied
> 
> reverted, breaks on BSDs
> 
> ar: illegal option -- D
> Usage: ar [emulation options] [-]{dmpqrstx}[abcfilNoPsSuvV] [member-name] [count] archive-file file...
>        ar -M [<mri-script]
>  commands:
>   d            - delete file(s) from the archive
>   m[ab]        - move file(s) in the archive
>   p            - print file(s) found in the archive
>   q[f]         - quick append file(s) to the archive
>   r[ab][f][u]  - replace existing or insert new file(s) into the archive
>   t            - display contents of archive
>   x[o]         - extract file(s) from the archive
>  command specific modifiers:
>   [a]          - put file(s) after [member-name]
>   [b]          - put file(s) before [member-name] (same as [i])
>   [N]          - use instance [count] of name
>   [f]          - truncate inserted file names
>   [P]          - use full path names when matching
>   [o]          - preserve original dates
>   [u]          - only replace files that are newer than current archive contents
>  generic modifiers:
>   [c]          - do not warn if the library had to be created
>   [s]          - create an archive index (cf. ranlib)
>   [S]          - do not build a symbol table
>   [v]          - be verbose
>   [V]          - display the version number
>  emulation options:
>   No emulation specific options
> ar: supported targets: elf64-x86-64 elf32-i386 a.out-i386-netbsd coff-i386 efi-app-ia32 elf64-little elf64-big elf32-little elf32-big srec symbolsrec tekhex binary ihex netbsd-core
> gmake: *** [libavdevice/libavdevice.a] Error 1

Is it BSD, or just an old binutils version?
Maybe a configure check for "ranlib -D" could be added.


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