hascall@cs.iastate.edu (John Hascall) (05/10/90)
I am porting a package from a "true" BSD system to an
Ultrix system and have run into a problem--in several of
this package's Makefiles are commands like:
ranlib -t libfoo.a
and since there is no "-t" option for ranlib under Ultrix
much complaining occurs [this is Ultrix T3.1D-0 (Rev. 45)
Worksystem X2.2 System #1 --if that makes any difference].
The man pages for ranlib under BSD says the following
about the "-t" option:
If given the -t option, ranlib only "touches" the archives
and does not modify them.
does that mean I can just use:
touch libfoo.a
or is something more elaborate involved (like touching individual
archive members?)?
Thanks,
John Hascall / hascall@atanasoff.cs.iastate.edu / gvjph@isuvax.bitnet
ISU Comp Ctr / 245 Durham / Ames, Iowa 50011 / (515)294-9551ed@mtxinu.COM (Ed Gould) (05/10/90)
> The man pages for ranlib under BSD says the following >about the "-t" option: > If given the -t option, ranlib only "touches" the archives > and does not modify them. >does that mean I can just use: > touch libfoo.a >or is something more elaborate involved (like touching individual >archive members?)? "Touching" an archive in this context is more elaborate than just using touch. One of the members of the library is the element created by running ranlib: it's a dictionary of the symbols used by and declared by the various library members. Programs that use the dictionary verify that it's current by comparing the modification time of the dictionary to the mod time of the library itself. If the library is newer than the dictionary contained within it, then the dictionary is presumed to be out of date. When one copies a library, one often changes its mod time. The -t option to ranlib "touches" the dictionary - so that it appears to be current - without regenerating it. Generating the dictionary is typically a quick operation, so just leaving off the -t on Ultrix systems will probably not cost much. -- Ed Gould mt Xinu, 2560 Ninth St., Berkeley, CA 94710 USA ed@mtxinu.COM +1 415 644 0146 "I'll fight them as a woman, not a lady. I'll fight them as an engineer."