Hi, I can't run SWI-Prolog on Mac OS X, hope you can help. I've downloaded first: SWI-Prolog/XPCE for MacOS X 10.4 (tiger) on ppc, and installed it on my computer, then realized that i need the (tiger) on intel version.

1. C++ For Mac

So, i deleted the whole 'opt' folder (as it didn't exist before), and installed the version for intel: SWI-Prolog/XPCE 5.6.32 for MacOS X 10.4 (tiger) on intel The process went well and said that it was installed successfully. But I don't know how to run it. It says 'System is installed in /opt/local/bin/swipl', I have the opt/local/bin and many others in opt directory, but no swipl anywhere. It also said 'Needs X11 installed', which I previously did. Thank you in advance, Anamaria Stoica No need to miss a message. Get email on-the-go with Yahoo! Mail for Mobile.

For further info, please visit To unsubscribe, send a plaintext mail with 'unsubscribe prolog ' in its body to. You need to: 1. Start the X11 application 2. Open a Terminal 3. Type: env DISPLAY=:0 /opt/local/bin/swipl That should start SWI. You can check if the X11 part is working by typing 'help.' At the Prolog prompt?- help.

This should bring up a new window with the help browser. HiI can't run SWI-Prolog on Mac OS X, hope you can help. I've downloaded first: SWI-Prolog/XPCE for MacOS X 10.4 (tiger) on ppcand installed it on my computer, then realized that i need the (tiger) on intel version. So, i deleted the whole 'opt' folder (as it didn't exist before), and installed the version for intel: SWI-Prolog/XPCE 5.6.32 for MacOS X 10.4 (tiger) on intel The process went well and said that it was installed successfully.

But I don't know how to run it. It says 'System is installed in /opt/local/bin/swipl', I have the opt/local/bin and many others in opt directory, but no swipl anywhere. It also said 'Needs X11 installed', which I previously did. Thank you in advanceAnamaria Stoica No need to miss a message. Get email on-the-go with Yahoo! Mail for Mobile.

- For further info, please visit To unsubscribe, send a plaintext mail with 'unsubscribe prolog mail' in its body to - For further info, please visit To unsubscribe, send a plaintext mail with 'unsubscribe prolog ' in its body to. On 1 Apr 2007, at 1:54 am, Samer Abdallah wrote: You need to: 1.

Start the X11 application 2. Open a Terminal 3. Type: env DISPLAY=:0 /opt/local/bin/swipl Why set DISPLAY to:0? The usual setting for $DISPLAY in a shell running under X11 on a Unix box with just one display is ':0.0' (not ':0'), and on my MacOS 10.4.7 box, 'open -a X11' give me a terminal where $DISPLAY already has the right:0.0 value. And starting X11 gives me an xterm, which is just what I want, not a Terminal, which isn't. For further info, please visit To unsubscribe, send a plaintext mail with 'unsubscribe prolog ' in its body to. You need to: 1.

Start the X11 application 2. Open a Terminal 3. Type: env DISPLAY=:0 /opt/local/bin/swipl That should start SWI. You can check if the X11 part is working by typing 'help.'

At the Prolog prompt ?- help. This should bring up a new window with the help browser. No need to miss a message. Get email on-the-go with Yahoo! Mail for Mobile. - For further info, please visit To unsubscribe, send a plaintext mail with 'unsubscribe prolog mail' in its body to - For further info, please visit To unsubscribe, send a plaintext mail with 'unsubscribe prolog ' in its body to Food fight? Enjoy some healthy debate in the Yahoo!

Answers Food & Drink Q&A. For further info, please visit To unsubscribe, send a plaintext mail with 'unsubscribe prolog ' in its body to. Alan Baljeu wrote: I currently have C# code which calls C which calls Prolog which calls C which calls C#. Does anyone know a better way? Make up a network protocol using UBF(A)?

Use of a network protocol, rather than an API, is defended in Chapter 9, 'APIs and Protocols' in Joe Armstrong's Ph.D. Thesis: - Darren Bane Thanks for the response. That looks like a very interesting an instructive thesis.

But I guess I should have defined 'better'. I meant 'more directly' and 'faster'. Perhaps I could set up an inprocess communication pipeline to transmit data across environments. I know extremely little about how that is done. If someone believes that may be better (according to the above definition), and has a suggestion on how to achieve that, I'm all eyes. Alan - For further info, please visit To unsubscribe, send a plaintext mail with 'unsubscribe prolog ' in its body to.

Alan Baljeu wrote:!snip! Thanks for the response. That looks like a very interesting an instructive thesis. But I guess I should have defined 'better'. I meant 'more directly' and 'faster'. Perhaps I could set up an inprocess communication pipeline to transmit data across environments. I know extremely little about how that is done.

If someone believes that may be better (according to the above definition), and has a suggestion on how to achieve that, I'm all eyes. I can't argue what that criterion.

However, unless you're generating all your glue code from something like SWIG, writing the FFI code will take time too. Such code is usually simple to write, but an absolute bitch to debug because the symptoms of getting the GC interaction wrong won't surface until many seconds after the mistake was made. Just contrast writing that boring FFI code in C with 300-400 lines of a network server in Prolog (I presume it would take about the same as Erlang, since both languages are about as powerful as each other). Darren Bane - For further info, please visit To unsubscribe, send a plaintext mail with 'unsubscribe prolog ' in its body to. 'Alan Baljeu' ha scritto nel messaggio news:01f401c7752e$55f2f640$1dc80ac60524254$gmane$org@CTI. I currently have C# code which calls C which calls Prolog which calls C which calls C#. Does anyone know a better way?

P#, being Prolog compiled to C#, has a shorter path, but i can't see any utility in swi-pl. Anyway, being the foreign swi-pl interface in C, the path can't be shorter. But you could avoid the last C to C# (re)writing directly the C# applicative part in managed C (maybe could be done automatically, but i'm not shure) embedded in the foreign interface. I bet the efficiency gain will be very small. Bye Carlo - For further info, please visit To unsubscribe, send a plaintext mail with 'unsubscribe prolog ' in its body to. Alan Baljeu wrote: !snip! Thanks for the response.

That looks like a very interesting an instructive thesis. But I guess I should have defined 'better'. I meant 'more directly' and 'faster'. Perhaps I could set up an inprocess communication pipeline to transmit data across environments. I know extremely little about how that is done. If someone believes that may be better (according to the above definition), and has a suggestion on how to achieve that, I'm all eyes.

I can't argue what that criterion. However, unless you're generating all your glue code from something like SWIG, writing the FFI code will take time too. Such code is usually simple to write, but an absolute bitch to debug because the symptoms of getting the GC interaction wrong won't surface until many seconds after the mistake was made. Just contrast writing that boring FFI code in C with 300-400 lines of a network server in Prolog (I presume it would take about the same as Erlang, since both languages are about as powerful as each other). I'm more and more convinced that merging Prolog with orther complex environments doing GC, etc. In one process is not a good idea. Most of the cases you are much better of keeping some distance between Prolog and the rest of the code using the network.

The result is often much easier to debug. Both finding weird interaction problems and in simple Prolog debugging as the network solution allows you to keep access to the toplevel (running the services from a Prolog thread). Cheers - Jan - For further info, please visit To unsubscribe, send a plaintext mail with 'unsubscribe prolog ' in its body to. I'm using SWI Prolog 5.6.12 with Windows XP. I needed to speed up some of my code, so I ran some speed tests on it. I was hoping to compare the speed of new code with the speed of old code. This led to some baffling behaviour.

I couldn't understand why one rule ran faster than another one. It turned out that if I compiled two identical copies of the program, one copy runs faster than the other! Download driver printer epson lx 300 for mac. If I start up 4 or 5 identical copies of the program, some of them run faster than others. Does anyone know why this is so? Can I control this in some way? Here are some comparisons of the results of running some speed tests on one bit of code.

Program copy number 1. Speed test 1. Duration was 0.453 seconds. Duration was 0.422 seconds. Duration was 0.437 seconds.

Program copy number 2. Speed test 1. Duration was 0.391 seconds. Duration was 0.375 seconds.

Duration was 0.375 seconds. When I timed a different bit of code, the differences in speed are even greater. Look at these speed tests. Program copy number 1.

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Speed test 2. Duration was 0.062 seconds.

Duration was 0.0780001 seconds. Duration was 0.063 seconds. Duration was 0.0780001 seconds. Duration was 0.063 seconds. Program copy number 2.

Speed test 2. Duration was 0.016 seconds.

Duration was 0.0159998 seconds. Duration was 0.0159998 seconds. Duration was 0.016 seconds. This inconsistent behaviour makes it hard to test the speed of a bit of code. Is there a way to control this problem? (In the tests above, I have not shown the.first.

time the code is run. This is normally much slower than later times.

I think this is due to SWI Prolog spending some time indexing some Prolog facts, the first time those facts are used.) - Martin Sondergaard, London, UK. For further info, please visit To unsubscribe, send a plaintext mail with 'unsubscribe prolog ' in its body to. Just contrast writing that boring FFI code in C with 300-400 lines of a network server in Prolog (I presume it would take about the same as Erlang, since both languages are about as powerful as each other). I'm more and more convinced that merging Prolog with orther complex environments doing GC, etc. In one process is not a good idea. Most of the cases you are much better of keeping some distance between Prolog and the rest of the code using the network. The result is often much easier to debug.

Both finding weird interaction problems and in simple Prolog debugging as the network solution allows you to keep access to the toplevel (running the services from a Prolog thread). I'm currently operating a single-process solution, no webserver, no network. Since copying is obviously necessary in any conceivable solutionmaybe it wouldn't hurt performance to have a separate process. (Or maybe it would. I don't know.) But I require education here. What is the (best) way to set up communications? Depends very much on the language and libraries you want to use, how complicated the datatypes are, whether you want to stay language independent, etc.

You can find a binary exchange system for C in the package cppproxy (download the source). This never came to completion, but there is a good start there. You can also use HTTP and use the HTTP server libraries. This is not particulary fast, but it is very flexible with wide support in many languages. Jan - For further info, please visit To unsubscribe, send a plaintext mail with 'unsubscribe prolog ' in its body to.

What is the (best) way to set up communications? Depends very much on the language and libraries you want to use, how complicated the datatypes are, whether you want to stay language independent, etc. You can find a binary exchange system for C in the package cppproxy (download the source). This never came to completion, but there is a good start there. You can also use HTTP and use the HTTP server libraries. This is not particulary fast, but it is very flexible with wide support in many languages.

- Jan I just need an efficient and simple way to retrieve data from C# objects. The environment is Windows XP. I don't like how the current system converts data from C# into C, then converts from C to PlTerms. It might not be a huge issue, but I thought maybe there was a better way. For further info, please visit To unsubscribe, send a plaintext mail with 'unsubscribe prolog ' in its body to. What is the (best) way to set up communications?

Depends very much on the language and libraries you want to use, how complicated the datatypes are, whether you want to stay language independent, etc. You can find a binary exchange system for C in the package cppproxy (download the source). This never came to completion, but there is a good start there.

You can also use HTTP and use the HTTP server libraries. This is not particulary fast, but it is very flexible with wide support in many languages.

- Jan I just need an efficient and simple way to retrieve data from C# objects. The environment is Windows XP. I don't like how the current system converts data from C# into C, then converts from C to PlTerms. It might not be a huge issue, but I thought maybe there was a better way. Efficiency-wise this isn't too bad in general. Jan - For further info, please visit To unsubscribe, send a plaintext mail with 'unsubscribe prolog ' in its body to.

Here are some comparisons of the results of running some speed tests on one bit of code. Program copy number 1. Speed test 1. Duration was 0.453 seconds. Duration was 0.422 seconds.

Duration was 0.437 seconds. Program copy number 2.

Speed test 1. Duration was 0.391 seconds. Duration was 0.375 seconds. Duration was 0.375 seconds. This tells us practically nothing.

The variation within the tests is typical timing noise; any benchmark that runs for less than 10 seconds is pretty useless. The variation between the tests is interesting, but without knowing what you mean by 'copy'. (In the tests above, I have not shown the.first. time the code is run. This is normally much slower than later times. I think this is due to SWI Prolog spending some time indexing some Prolog facts, the first time those facts are used.) Probably not.

It's well known in the micro-benchmarking field that you have to 'burn in' a test. It has to do with the memory hierarchy. For example, I recently ran some system benchmarks on two machines, an UltraSPARC and a PowerPC: Fetch from main L1 cache L2 cache memory SPARC 2 cycles 10 cycles 100 cycles PowerPC 3 cycles 10 cycles 95 cycles On the basis of that, I've just done a test that found counting occurrences of a wide character in 4 million wide characters is 1.28 times faster if I do it on utf8-compressed text, decompressing as I go, rather than the simple obvious wchart-at-a-time loop you would think to write. These days, we have lots of main memory, but it is MUCH slower than we think it is, and which bits are in cache can have a very large effect on our benchmarks. For further info, please visit To unsubscribe, send a plaintext mail with 'unsubscribe prolog ' in its body to.

Building SWI Prolog on Mac Jul 12, 2014 Getting to build on Mac OS X (Darwin) is no small feat. Yes, one could use the or packaging systems, and that would certainly make things easier.

Frankly, after using Solaris for many years, I’m burned out on third-party packaging systems. Especially when there are multiple competing systems; it makes the that much worse. Below, I’ll quickly go over each of the steps for compiling swipl and its dependencies. This assumes you have installed since it tends to make compiling software from source code much easier. GNU readline Install GNU readline, which is really easy so I won’t go into details. $ swipl Welcome to SWI-Prolog (Multi-threaded, 64 bits, Version 6.6.6 ) Copyright (c ) 1990-2013 University of Amsterdam, VU Amsterdam SWI-Prolog comes with ABSOLUTELY NO WARRANTY.

This is free software, and you are welcome to redistribute it under certain conditions. Please visit for details. For help, use?- help (Topic ).

Or?- apropos (Word ).?- Trying to quit is fun. Turns out Ctrl-d works, as does halt(0). Once you have that operational, take a look at Bernardo Pires to Prolog.