Thanks, Nick. your explanations gave a good step forward understanding this "gnu-ar". but I am not convinced in the usefulness of the path (P) options after all.
thin archives shall be the way forward, hopefully the linker uses the right search paths to lead to the objects...but this is another matter. Best Regards, Christian Montanari. On Fri, 2011-10-14 at 17:20 +0100, Nick Clifton wrote: > Hi Christian, > > > GNU ar (GNU Binutils) 2.19 > > FYI 2.21 is now out and 2.22 is due soon... > > > > and the commands: > > > > ar rP a.ar b/c.o > > ar rP a.ar b/c.o > > > > will add the object "c.o" twice in the archive "a.ar". > > > > is this the correct behaviour? > > Yes. Although it certainly is not intuitive. What is happening is that > the first invocation of ar adds c.o to the newly created archive. (Note > the file is stored as "c.o" not "b/c.o" as GNU format archives do *not* > include pathname information). > > The second invocation of ar then adds b/c.o again because you have used > the P command modifier. This tells ar to expect a non-GNU format > archive where pathnames *are* retained. Thus the filename matching part > of the "r" command checks "b/c.o" (from the command line) against "c.o" > (from the archive), decides that they are different, and so adds "c.o" > again. > > the constraint also is that my "a.ar" archive will have other objects > > "c.o" on different paths, and I do not want to be replaced by object > > "b/c.o". > > > > how to handle relative paths in the GNU binutils-ar? > > The only way to do this is to create a thin archive in conjunction with > the P modifier. For example: > > % ar rTP a.ar b/c.o > % ar t a.ar > b/c.o > % ar rTP a.ar b/c.o > % ar t a.ar > b/c.o > % ar rTP a.ar c/c.o > % ar t a.ar > b/c.o > c/c.o > > Please note however that thin archives do not contain the actual objects > themselves, just the (relative) paths to the objects. So you cannot > move them or export them. > > Cheers > Nick > __________________________________________________________ Sharp Telecommunications of Europe Limited Reg. No. 02483876 Reg. Office: Azure House, Bagshot Road, Bracknell, Berkshire, RG12 7QY __________________________________________________________ This e-mail, including any attachments to it, is intended solely for the addressee. It is confidential and may also be legally privileged. If you are not the intended recipient, please return this e-mail to the sender immediately and permanently delete it from your computer system. Except as specifically authorised by the sender, any copying, disclosure, distribution or any action taken or omitted to be taken in reliance on it is prohibited. Please note that any non-business content of this e-mail is a private opinion of the author. Although preventative measures have been taken to detect any viruses present on the system, the company does not accept liability for any damage caused by viruses or malignant code that may be found in this e-mail or any attachments to it. This e-mail does not constitute a binding agreement on the part of Sharp Telecommunications of Europe Limited without the express written confirmation of a duly authorised representative of the company. All messages sent and received by Sharp Telecommunications of Europe Limited are monitored for virus, high risk file extensions, and inappropriate content. As a result users should be aware that mail might be accessed. __________________________________________________________ _______________________________________________ bug-binutils mailing list bug-binutils@gnu.org https://lists.gnu.org/mailman/listinfo/bug-binutils
