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

Re: How to create a .dylib
by Michael B Allen 21 Mar '05

21 Mar '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Importance: Normal User-agent: SquirrelMail/1.4.2 Alessandro Perrone said: > Hi all > Is it possible to have an example on how to write a library on > Darwin/OsX? > How to create a .dylib I'm sort of a newbie to this too. One thing that I found quite useful was a PDF about the Mach-O Runtime. It explains how to link a dylib among other things. I can't find the link now but perhaps someone else has a pointer? Note I'm not talking about the PDF-ized version of the "Mach-O Runtime Architecture" HTLM documentation on ADC. There's anothor PDF that's more concise and generally better. I don't have it in front of my at the moment so I cannot provide any other details as to it's origin. Another thing to consider is making a Framework. It's just a dylib with some directories and largely empty parameter files but I beleive it is the preferred organization for a library. The Frameworks documentation is here: http://developer.apple.com/documentation/MacOSX/Conceptual/BPFrameworks/ind… But the "Mach-O Runtime" PDF I mentioned explains Frameworks as well. Personally I'm also looking at creating a installation pkg file using PackageMaker to install my Framework. That way, when someone wants to install your lib then just download and click through. No hassles. The extra work involved with building a Framework pkg seems pretty minimal. 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: How to create a .dylib
by Markus Weissmann 21 Mar '05

21 Mar '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com -Markus On 21. Mar 2005, at 22:58 Uhr, Alessandro Perrone wrote: This email sent to mww(a)opendarwin.org --- Markus W. Weissmann http://www.mweissmann.de/ http://www.opendarwin.org/~mww/ _______________________________________________ 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 mean something like $ gcc somestuff.c -dynamiclib -o mylib.0.0.1.dylib -current_version 0.0.1 -install_name /usr/local/mylib.dylib ? Hi all Is it possible to have an example on how to write a library on Darwin/OsX? How to create a .dylib? Regards. ALEX _______________________________________________ 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/mww%40opendarwin.org This email sent to site_archiver(a)lists.apple.com

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How to create a .dylib
by Alessandro Perrone 21 Mar '05

21 Mar '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi all Is it possible to have an example on how to write a library on Darwin/OsX? How to create a .dylib? Regards. ALEX _______________________________________________ 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: dylib or Framework?
by Kevin Van Vechten 21 Mar '05

21 Mar '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com - Kevin On Mar 20, 2005, at 5:46 PM, Michael B Allen wrote: _______________________________________________ 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… Frameworks are essentially dylibs packaged in bundle containing their headers and other support files. There's documentation available: <http://developer.apple.com/documentation/MacOSX/Conceptual/ BPFrameworks/index.html> I have a library of generic C modules (e.g. hashmap, allocator, csv parser, etc) [1] that I have ported to OS X. At least it compiles cleanly. Now I need to figure out how to package it. My question is - should I create a Framework or just a standard UNIX style shared library to go in /usr/lib? In either case I'm just using a straight forward Makefile at this point. My code is just POSIX level stuff (mostly ANSI C actually). Can someone provide a pointer to a Makefile that illustrates how to correctly build a dylib and/or Framework? This email sent to site_archiver(a)lists.apple.com

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Re: dylib or Framework?
by Matthew T. Russotto 21 Mar '05

21 Mar '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Mar 20, 2005, at 5:46 PM, Michael B Allen wrote: _______________________________________________ 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 library of generic C modules (e.g. hashmap, allocator, csv parser, etc) [1] that I have ported to OS X. At least it compiles cleanly. Now I need to figure out how to package it. My question is - should I create a Framework or just a standard UNIX style shared library to go in /usr/lib? In either case I'm just using a straight forward Makefile at this point. My code is just POSIX level stuff (mostly ANSI C actually). Can someone provide a pointer to a Makefile that illustrates how to correctly build a dylib and/or Framework? dylibs are easy; pretty similar to shared libraries on other platforms. Use 'libtool', 'ld -dylib', or 'gcc -nostartfiles -Wl,-dylib' to make the library. I can't help with Frameworks; whether you should make one or not probably depends on your target audience. If you're targeting other Unix-app porters, might as well stick with /usr/local/include and /usr/local/lib. If you're targeting people using XCode, etc, a Framework is probably a good idea. This email sent to site_archiver(a)lists.apple.com

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dylib or Framework?
by Michael B Allen 20 Mar '05

20 Mar '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Importance: Normal User-agent: SquirrelMail/1.4.2 I have a library of generic C modules (e.g. hashmap, allocator, csv parser, etc) [1] that I have ported to OS X. At least it compiles cleanly. Now I need to figure out how to package it. My question is - should I create a Framework or just a standard UNIX style shared library to go in /usr/lib? In either case I'm just using a straight forward Makefile at this point. My code is just POSIX level stuff (mostly ANSI C actually). Can someone provide a pointer to a Makefile that illustrates how to correctly build a dylib and/or Framework? Thanks, Mike [1] http://www.ioplex.com/~miallen/libmba/ _______________________________________________ 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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Screen dimming
by thomas-ml＠deniau.org 19 Mar '05

19 Mar '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Organization: Nousoft User-agent: MacSOUP/2.6b2 (Mac OS X version 10.3.8) Hello, I'm trying to have the monitor go to sleep, as the Energy Saver does after a long period of inactivity. I've found info in the archives about how to launch the screen saver, or how to prevent it from launching, but nothing about actually triggering a monitor shutdown. The closest I've found in the PowerManager DDK is kPMHasDimmingSupportMask, but it's only a capability flag, and I haven't found any way to actually shut the screen down. [since IOPMSchedulePowerEvent only accepts wake, sleep, power on, shutdown] Do I have to dig in the depths of the IOKit to do this or is there a better way ? Thanks in advance, -- Thomas Deniau _______________________________________________ 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: Apple gcc bug
by Aaron Jackson 17 Mar '05

17 Mar '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Aaron On Mar 17, 2005, at 5:51 PM, Matt Watson wrote: On Mar 17, 2005, at 2:25 PM, Aaron Jackson wrote: matt. _______________________________________________ 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… Thanks everybody for the input. I guess I just have to get my buggy code to stop dividing by zero. Unfortunately, the fpsetmask function doesn't seem to exist on my mac, or at least ieeefp.h doesn't. Is there an equivalent function I can use on my mac? Thanks. No, there isn't. The PowerPC architecture provides no way of detecting integer divide-by-zero. This email sent to site_archiver(a)lists.apple.com

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Re: Apple gcc bug
by Matt Watson 17 Mar '05

17 Mar '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Mar 17, 2005, at 2:25 PM, Aaron Jackson wrote: matt. _______________________________________________ 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… Unfortunately, the fpsetmask function doesn't seem to exist on my mac, or at least ieeefp.h doesn't. Is there an equivalent function I can use on my mac? Thanks. No, there isn't. The PowerPC architecture provides no way of detecting integer divide-by-zero. This email sent to site_archiver(a)lists.apple.com

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Re: Apple gcc bug
by Andrew White 17 Mar '05

17 Mar '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com User-agent: Mozilla Thunderbird 0.9 (Macintosh/20041103) On Mar 17, 2005, at 4:55 PM, Matt Watson wrote: #define MY_INT_DIV(x,y) my_checked_int_divide ((x),(y)) int my_checked_int_divide (x,y) { if (y) { return x / y; } else { // Suitable error handling goes here } } #define MY_INT_DIV(x,y) ((x)/(y)) -- Andrew White -------------------------------------------------------------------------- This email and any attachments are confidential. They may contain legally privileged information or copyright material. You should not read, copy, use or disclose them without authorisation. If you are not an intended recipient, please contact us at once by return email and then delete both messages. We do not accept liability in connection with computer virus, data corruption, delay, interruption, unauthorised access or unauthorised amendment. This notice should not be removed. _______________________________________________ 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… Aaron Jackson wrote: Sorry for jumping to the wrong conclusion. The problem is that I am doing some numerical calculations (solving nonlinear equations with a nonlinear constraint) and the algorithm I am using sometimes wanders off into nowhere (I am still debugging things). I haven't done any c programming in quite a while, and got used to the crashing behavior when I first learned and thought that was how things operated. Since this is undefined, I would like for the program to throw a SIGFPE, Undefined means 'undefined'. The compiler doesn't have to catch the exception, and (from Andrew Pinski's reports) the chip *doesn't* catch the exception. In order to do what you're requesting, the compiler would have to write pre-checking code to note that it is about to do a division by 0 and manually synthesise an exception. Personally, I'd rather my compiler *not* add an extra test-compare into every division operation I program. It's undefined because _it should never happen_, and because their are a variety of different ways the *hardware* might choose to deal with this error. The C standard tries to only mandate particular behaviour if it is necessary for correct program execution. By definition, undefined areas are *not* necessary for correct program execution, because they will never be executed by a correct program. If your code is allowing it to happen, add a test-compare before each division operation in your code. See which one triggers. Drop a breakpoint inside that else and you get an instant stack trace whenever you attempt to divide by zero. Once you've fixed the bug, just change the divide to: This email sent to site_archiver(a)lists.apple.com

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