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Dan, All, On Sunday 18 July 2010 17:54:00 Dan Jordan wrote: > I'm trying to find a way to compile ldd to using crosstool-NG and glibc. > I'm compiling a toolchain using version 1.7.0 of crosstool-NG, with glibc to arm > architechture. (for example, to the arm-unknown-linux-eabi configuration). ldd is a run-time tool, not a build-time tool. What ldd does can *not* be done on the build host, as it requires the actual dynamic linker to be able to _run_. So, simple hope to have a _real_ cross-ldd is desperate, there's no such thing as a _real_ cross-ldd. > I've seen that you can configure crosstool-NG to build ldd if you are using > uClibc, but not if you're using glibc. Yes, but I'm not sure how it behaves, and what it does... > I've seen a post?(http://sourceware.org/ml/crossgcc/2008-11/msg00010.html)? that > supplied some sort of a workaround using readelf, but does not supply a full > solution. Yes, basically, what such a script would do is: - expect to be given a directory to treat as the rootfs - from that directory, scan /etc/ld.co.conf et al. - extract a library search path from that - scan the specified file with readelf, and extract the NEEDED tags - scan the library search path (above) for those NEEDED libs - for each library found - print the (relative?) path - recurse with readelf for NEEDED tags - for missing libs, say so The script could (try to) interprt LD_LIBRARY_PATH, LD_PRELOAD and all the fuss. That's non-trivial, but not impossible (except for the LD_PRELOAD, maybe). And it will *not* be a true replacement for a reall ldd that runs on the target. Maybe I bang on such a beast tonight, the issue comes up often, and it is time that we have such script. But if it turns out to be too complex, then f*ck, we'll live with out that, and it's going in docs/known-issues.txt... > My question is: is there a way to build a full-featured cross-ldd using glibc > using crosstool-NG? If so, how? If not, why? I hope I was clear enough in the above to answer those questions. ;-) Regards, Yann E. MORIN. -- .-----------------.--------------------.------------------.--------------------. | Yann E. MORIN | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: | | +33 662 376 056 | Software Designer | \ / CAMPAIGN | ___ | | +33 223 225 172 `------------.-------: X AGAINST | \e/ There is no | | http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL | v conspiracy. | '------------------------------^-------^------------------^--------------------' -- For unsubscribe information see http://sourceware.org/lists.html#faq
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