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

Loading dynamic libraries with dlopen
by Tron Thomas 07 May '05

07 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com User-agent: Mozilla Thunderbird 1.0.2 (Windows/20050317) _______________________________________________ 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… I am involved in a cross platform project that uses API's like dlopen to dynamically loaded needed libraries. On Mac OS X, these libraries are implemented with the dynamic library style as opposed to bundle library style. I have found that when I load a dynamic library using dlopen I cannot close the library using dlclose, and a call to dlerror explicitly says "dynamic libraries cannot be closed". I know I should be able to close the libraries if they used the bundle style instead. I have found, however, that if I convert the style of the libraries from dynamic to bundle, the application will hang while loading. Right I'm not familiar enough with everything that happens when the application starts up to figure out why it doesn't work. Also, getting the program working on the Macintosh is lower priority than other projects. So, I'm would like to leave the libraries as dynamic if I can, and I'm not sure if this is the best thing to do. What are the implications of loading dynamic style libraries with dlopen? How does the fact that these libraries can't be closed affect the system? This email sent to site_archiver(a)lists.apple.com

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Re: Using cross-development SDKs in command line builds
by Markus Hitter 07 May '05

07 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Am 07.05.2005 um 04:41 schrieb Bill Northcott: In Panther, I use this: export MACOSX_DEPLOYMENT_TARGET=10.1 export NEXT_ROOT=/Developer/SDKs/MacOSX10.1.5.sdk CFLAGS="-I/Developer/SDKs/MacOSX10.1.5.sdk/usr/include -O2" \ LDFLAGS="-L/Developer/SDKs/MacOSX10.1.5.sdk/usr/lib/" \ ./configure HTH, Markus - - - - - - - - - - - - - - - - - - - Dipl. Ing. Markus Hitter http://www.jump-ing.de/ _______________________________________________ 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… Is there any way to do command line builds of GNU autoconf configured packages on Tiger to target older versions of Darwin such as 7 or even 6, using the SDKs supplied with Xcode? It isn't perfect as it falls back to the currently installed system headers, but it did work several times. This email sent to site_archiver(a)lists.apple.com

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Re: How to create a DLL ?
by Michael B Allen 07 May '05

07 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Importance: Normal User-agent: SquirrelMail/1.4.2 Brian Jorgage said: > I have a command-line user-space application with several methods which > I would like to put into a "DLL". > > How to create a DLL on Mac OS X ? gcc -g -Wall -W -fPIC -c -o src/foo.o src/foo.c gcc -g -Wall -W -fPIC -c -o src/bar.o src/bar.c gcc -g -Wall -W -fPIC -c -o src/zap.o src/zap.c gcc -dynamiclib -install_name libyoyo.0.9.dylib \ src/foo.o src/bar.o src/zap.o -o libyoyo.0.9.1.dylib I just started compiling my stuff for OS X and wrote a simple compiler wrapper that takes normalized compiler arguments and calls the local compiler with appropriate transliterated arguments. It's call mktool. You can find it on the top level directory of any of my OSS projects: http://www.ioplex.com/~miallen/libmba/dl/mktool.c For example if you do: ./mktool -l -libname yoyo -libvers 0.9.1 \ -shared -soname src/foo.o src/bar.o src/zap.o this will invoke the local compiler to build a library and works equally well on Linux, HP-UX, Tru64, and Mac OS X with gcc, DECC, and aCC. And mktool.c is one small ANSI C file so it can be included as a source file with your project and compiled as a "bootstrap" target like: all: mktool <build app with ./mktool here> mktool: mktool.c $(CC) -o mktool mktool.c It's basically a /greatly/ simplified libtool. > Is this the same thing as a .so file ? Yes. For the Mach-O runtime it's called a dylib. Mike _______________________________________________ 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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Re: Tiger and libreadline
by Martin Costabel 07 May '05

07 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com User-agent: Mozilla Thunderbird 1.0 (Macintosh/20041206) On May 6, 2005, at 1:07 AM, Martin Costabel wrote: I maintain that this is broken. -- 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… Boyd Waters wrote: Many GNU packages rely on libreadline. It seems that in Darwin there is a BSD libedit, which is symlinked as libreadline and has a corresponding readline.h. This breaks Octave and probably other builds. ... In addition, there is no BSD version of libreadline. BSD libedit has been in Mac OS X since at least 10.2. The new things are the compatibility wrappers in readline/readline.h and, and this seems to me to be Apple's invention, the symlinks readline/history.h- >readline.h and libreadline.dylib->libedit.2.dylib. The overall effect is the same (licensing issues aside) as having included a very old incompatible version of GNU readline. I used the Gentoo package manager to install readline on my Tiger system; this replaced /usr/include/readline/* with GNU's version, and replaced the symlink to libedit.dylib with a "real" version of libreadline. I did not notice any breakage of other things, but have not compiled any Cocoa apps. The only things that I have built with xCode, since making this change, have been device drivers - nothing that relied upon readline. Are there problems with installing GNU readline? There is of course nothing wrong with installing GNU readline. Everyone who ever compiled software on MacOSX that needed readline installed GNU readline, whether this was done with the help of darwinports or Fink or by compiling individually from sources. Replacing stuff in /usr/include and /usr/lib is, however, a very bad practice, and I will never even test gentoo, let alone use it, if it does such things. The next minor OSX software update may very well destroy these files without telling you. Although, in the case at hand, it is very tempting to trash that annoying symlink /usr/lib/libreadline.dylib->libedit.dylib that has no useful function whatsoever. This email sent to site_archiver(a)lists.apple.com

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Using cross-development SDKs in command line builds
by Bill Northcott 07 May '05

07 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com The Apple instructions only seem to work for Xcode builds. Bill Northcott _______________________________________________ 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… Is there any way to do command line builds of GNU autoconf configured packages on Tiger to target older versions of Darwin such as 7 or even 6, using the SDKs supplied with Xcode? This email sent to site_archiver(a)lists.apple.com

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Problems embedding Perl
by brendandixon＠mac.com 07 May '05

07 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.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… This email sent to site_archiver(a)lists.apple.com

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Re: Tiger and libreadline
by Peter Bierman 07 May '05

07 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com It is, however, incompatible. There is no `BSD version' versus `GNU version'. The BSD libedit resembles readline in that they both provide emacs and vi editing modes, but there is neither source nor object compatibility. There has been some attempt to provide both, but it's not there yet (try key binding or multibyte character support). I maintain that this is broken. Then it's important that you file a bug with Apple using Radar. The appropriate people will not be tracking this issue on a mailing list. -pmb _______________________________________________ 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 Tiger version is neither broken nor 'incorrect'. It does what it says on the tin. It is however the BSD version not the GNU version. In addition, there is no BSD version of libreadline. BSD libedit has been in Mac OS X since at least 10.2. The new things are the compatibility wrappers in readline/readline.h and, and this seems to me to be Apple's invention, the symlinks readline/history.h->readline.h and libreadline.dylib->libedit.2.dylib. The overall effect is the same (licensing issues aside) as having included a very old incompatible version of GNU readline. This email sent to site_archiver(a)lists.apple.com

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Re: How to create a DLL ?
by Shawn Erickson 07 May '05

07 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On May 6, 2005, at 5:27 PM, Brian Jorgage wrote: How to create a DLL on Mac OS X ? Is this the same thing as a .so file ? Otherwise reviewing the following may help... <http://developer.apple.com/technotes/tn2002/tn2071.html> -Shawn _______________________________________________ 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… I have a command-line user-space application with several methods which I would like to put into a "DLL". Any information would be helpful. <http://developer.apple.com/documentation/Porting/Conceptual/ PortingUnix/compiling/chapter_4_section_7.html> <http://developer.apple.com/documentation/MacOSX/Conceptual/ BPFrameworks/Concepts/WhatAreFrameworks.html> Anyway are using Xcode? If so it has project templates (and documentation) for dynamic libraries as well as frameworks. This email sent to site_archiver(a)lists.apple.com

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How to create a DLL ?
by Brian Jorgage 07 May '05

07 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com I have a command-line user-space application with several methods which I would like to put into a "DLL". How to create a DLL on Mac OS X ? Is this the same thing as a .so file ? Any information would be helpful. Thanks, Brian Jorgage _______________________________________________ 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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Re: Darwin 8.0 Source Code Available
by Shawn Erickson 06 May '05

06 May '05

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com On May 6, 2005, at 12:32 PM, Jack Howarth wrote: -Shawn _______________________________________________ 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… Shantonu, You might notice it as a speed increase though. In the tests I have run at -O3 gcc-4.0 often creates code that can be 20-30% faster. ssshhhh.... they are likely saving that little speed up trick for 10.5 ;-) This email sent to site_archiver(a)lists.apple.com

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