June 2005 - Darwin-dev - lists.apple.com

Re: Compiling on 8.1.0, running on 7.8.0
by Martin Costabel 26 Jun '05

26 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com User-agent: Mozilla Thunderbird 1.0 (Macintosh/20041206) Steve Checkoway wrote: [] It would work on 7.9.0. It has /usr/lib/libstdc++.6.dylib. -- Martin _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… When I try to run this on a computer running Darwin 7.8.0, it fails: This email sent to site_archiver(a)lists.apple.com

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Compiling on 8.1.0, running on 7.8.0
by Steve Checkoway 26 Jun '05

26 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com When I try to run this on a computer running Darwin 7.8.0, it fails: And indeed, /usr/lib/libstdc++.6.dylib does not exist. Thank you for any assistance with this matter. - Steve _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com I'm sure there is a very simple thing I'm missing here so feel free to refer me to documentation. Basically, I'm trying to compile a simple hello world application in c++ on Darwin 8.1.0 and have it run on Darwin 7.8.0 (earlier would be nice). $ uname -vmp Darwin Kernel Version 8.1.0: Tue May 10 18:16:08 PDT 2005; root:xnu-792.1.5.obj~4/RELEASE_PPC Power Macintosh powerpc $ cat temp.cc #include <cstdio> int main() { puts("Hello World."); return 0; } $ MACOSX_DEPLOYMENT_TARGET=10.3 g++ temp.cc $ otool -L a.out a.out: /usr/lib/libstdc++.6.dylib (compatibility version 7.0.0, current version 7.3.0) /usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 1.0.0) /usr/lib/libmx.A.dylib (compatibility version 1.0.0, current version 92.0.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 88.0.0) $ uname -vmp Darwin Kernel Version 7.8.0: Wed Dec 22 14:26:17 PST 2004; root:xnu/ xnu-517.11.1.obj~1/RELEASE_PPC Power Macintosh powerpc $ ./a.out dyld: ./a.out can't open library: /usr/lib/libstdc++.6.dylib (No such file or directory, errno = 2) Trace/BPT trap I was under the (clearly mistaken) impression that if I compiled using the MACOSX_DEPLOYMENT_TARGET environment variable, that the code would run on the specified system and later using weak linking. However, if I compile temp.cc on the second computer and run it on the first, it works as expected. In that case, I get $ otool -L a.out a.out: /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 71.1.1) On the other hand, both libstdc++ and libgcc are static libraries only on the second computer and only dynamic libraries only dynamic libraries on the first. smime.p7s

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Re: geteuid() while debugging
by Justin C. Walker 25 Jun '05

25 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jun 25, 2005, at 15:41 , Adam Nohejl wrote: I'd forgotten that 'open' isn't really needed for the app itself. Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- It's not whether you win or lose... It's whether *I* win or lose. -------- _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… 2005/06/25 v 21:58, Justin C. Walker: You have to run gdb as root to debug processess running as root. (If you think about it, it makes sense.) I don't know whether there's any way for Xcode to run gdb as root but you can do it yourself (using sudo) if you don't depend on Xcode's GUI. [snip] I think you have to log in as root to do this; as I recall a change was made to Mac OS X a while back to prohibit launching GUI apps as root while logged in as not-root (or, perhaps, just prohibiting launching GUI apps under a different ID than that of the logged-in user; I forget). Not really. If one really needs to run a GUI application as root it's quite easy using sudo, e.g.: sudo /Applications/TextEdit.app/Contents/MacOS/TextEdit & Right you are; I was talking about "sudo open ....", which sheds the 'root' ID when it runs (i.e., it switches to that of the logged-in user). This was changed because it was perceived (I think) as a security issue... This email sent to site_archiver(a)lists.apple.com

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Re: geteuid() while debugging
by Adam Nohejl 25 Jun '05

25 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com 2005/06/25 v 21:58, Justin C. Walker: sudo /Applications/TextEdit.app/Contents/MacOS/TextEdit & -- Adam Nohejl Loki Software mailto:adam@lokisw.com http://lokisw.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… You have to run gdb as root to debug processess running as root. (If you think about it, it makes sense.) I don't know whether there's any way for Xcode to run gdb as root but you can do it yourself (using sudo) if you don't depend on Xcode's GUI. I think you have to log in as root to do this; as I recall a change was made to Mac OS X a while back to prohibit launching GUI apps as root while logged in as not-root (or, perhaps, just prohibiting launching GUI apps under a different ID than that of the logged-in user; I forget). Not really. If one really needs to run a GUI application as root it's quite easy using sudo, e.g.: There were just some minor issues in earlier versions of Mac OS X and in Tiger it seems to work perfectly. But this is not what I was talking about: For those who like the Xcode debugger GUI it might be nice (and should be technically possible AFAIK) to run Xcode as an ordinary user (to avoid potential risks) and gdb as root "inside" XCode, but there's no such option in Xcode. This email sent to site_archiver(a)lists.apple.com

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Re: Link Errors -- Relocation Overflow
by seebs＠plethora.net 25 Jun '05

25 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com In message <f9de0564785b0092809ccde68c3cf667(a)clarkwoodsoftware.com>, Bob Clark writes: ><http://lists.apple.com/archives/darwin-development/2001/May/ >msg00620.html> suggests that data sizes bigger than 32MB won't work; >hmmm. None of the individual libraries are larger than 32MB, but >cumulatively they probably are. But if that's related, then why is the >link failing for (as far as I can tell) all static libraries being >linked? I don't think (although I could be wrong) that this is the >issue. This looks like a good avenue for attack. Run size on everything, then try linking with fewer libraries until you get unresolved symbol errors instead. Then see what the total sizes are for the set that breaks it. -s _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Link Errors -- Relocation Overflow
by Bob Clark 25 Jun '05

25 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com As Ned Flanders would say, I've got a dilly of a pickle. I'd love to hear your suggestions. I'm on Panther (10.3.9) with XCode 1.5. Things I've tried: Thanks a lot in advance. --Bob _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… The code base I'm trying to build first builds many (over a hundred) static libraries, then links 'em into an app. That link is erroring out with a bunch of errors (over a hundred) like this: ld: /foo.a(bar.o) relocation overflow for relocation entry 704 in section (__TEXT,__text) (displacement too large) I've googled and searched through Apple's list archives and I'm about ready to throw in the towel and blow a DTS incident, but if anyone reading this knows: (a) exactly what this means (b) how to diagnose it more specifically than a hundred basically-identical link errors (c) how to avoid the error For what it's worth: the vast majority of this code is cross-platform (compiles, links, and runs on Windows and Linux at least) and the Mac-specific code works well for other products in which it's used. As suggested in <http://lists.apple.com/archives/darwin-development/2001/Aug/ msg00213.html>, I've tried compiling all the sources with "-mlong_branch". This didn't work. As suggested in <http://lists.apple.com/archives/darwin-development/2001/Aug/ msg00244.html>, I've tried (dubiously) to create stub functions for _carbon_init() and _objcInit(). This didn't work. As suggested in <http://lists.apple.com/archives/unix-porting/2002/Apr/msg00149.html>, I've tried tweaking the stacksize ("limit stacksize"), even though this looks like a Jaguar problem and I'm on Panther. I couldn't get the environment variable for stacksize set above where Panther defaults it, and it didn't seem to have an effect. As suggested in <http://lists.apple.com/archives/darwin-development/2003/Dec/ msg00147.html>, I've tried building with "-mdynamic-no-pic". This didn't work. <http://lists.apple.com/archives/darwin-development/2001/May/ msg00620.html> suggests that data sizes bigger than 32MB won't work; hmmm. None of the individual libraries are larger than 32MB, but cumulatively they probably are. But if that's related, then why is the link failing for (as far as I can tell) all static libraries being linked? I don't think (although I could be wrong) that this is the issue. <http://lists.apple.com/archives/darwinos-users/2001/Oct/msg00209.html> suggests that a huge static array may be the problem. I haven't found a huge static array in this code, although it's possible one exists. No other compilers (including the gcc toolchain used for Linux builds) complains. Have I missed an obvious link flag or compile flag that will prevent this problem from occurring? (This is what I'm hoping for: a "magic incantation" that will effortlessly solve all my problems.) Or does anyone have any suggestions for another angle for me to investigate this? This email sent to site_archiver(a)lists.apple.com

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Re: geteuid() while debugging
by Justin C. Walker 25 Jun '05

25 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jun 25, 2005, at 11:22 , Adam Nohejl wrote: Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- Men are from Earth. Women are from Earth. Deal with it. -------- _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… 2005/06/25 v 15:45, Chase: i have an if statement that looks like: [snip] You have to run gdb as root to debug processess running as root. (If you think about it, it makes sense.) I don't know whether there's any way for Xcode to run gdb as root but you can do it yourself (using sudo) if you don't depend on Xcode's GUI. I think you have to log in as root to do this; as I recall a change was made to Mac OS X a while back to prohibit launching GUI apps as root while logged in as not-root (or, perhaps, just prohibiting launching GUI apps under a different ID than that of the logged-in user; I forget). This email sent to site_archiver(a)lists.apple.com

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Re: Hooks for notification of move/rename/delete file?
by Brian Bergstrand 25 Jun '05

25 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Jun 25, 2005, at 2:20 PM, Jim Witte wrote: Hi, (Newbie here) Thanks, Jim _______________________________________________ Panther and Tiger: <sys/event.h> Brian Bergstrand <http://www.bergstrand.org/brian/> PGP Key ID: 0xB6C7B6A2 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (Darwin) iD8DBQFCvbKkedHYW7bHtqIRAjreAJ44mMgQTdAV5Epyr0EkYwQ23YSMZACcC+mg EOO7iYj4lUaDyo9bxsHFNSA= =WlHl -----END PGP SIGNATURE----- _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… Can a user-land application get Notifications from Darwin (or some layer above it in the FS) when a file is moved, renamed, or deleted? I'm thinking it would come in *quite* handy with QuickSilver, to keep the QS catalog up to date when you move things around in the Finder. This email sent to site_archiver(a)lists.apple.com

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Hooks for notification of move/rename/delete file?
by Jim Witte 25 Jun '05

25 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi, (Newbie here) Thanks, Jim _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… Can a user-land application get Notifications from Darwin (or some layer above it in the FS) when a file is moved, renamed, or deleted? I'm thinking it would come in *quite* handy with QuickSilver, to keep the QS catalog up to date when you move things around in the Finder. This email sent to site_archiver(a)lists.apple.com

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Re: geteuid() while debugging
by Adam Nohejl 25 Jun '05

25 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com 2005/06/25 v 15:45, Chase: i have an if statement that looks like: if (geteuid()==0) { // routing table adjustments that only root can make } -rwsr-xr-x root wheel thanks. -- Adam Nohejl Loki Software mailto:adam@lokisw.com http://lokisw.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… after each compile, i use chown/chmod to set the binary's privs like so: when i run the code normally, everything works just fine, whether launching as root or as a vanilla user. but, when i'm trying to step through the code with the xcode/gdb debugger, geteuid() is returning the uid of my vanilla user (the one i'm running xcode as). what can i do to fix this so that i can properly debug without having to log in as root to run xcode? You have to run gdb as root to debug processess running as root. (If you think about it, it makes sense.) I don't know whether there's any way for Xcode to run gdb as root but you can do it yourself (using sudo) if you don't depend on Xcode's GUI. This email sent to site_archiver(a)lists.apple.com

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