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Simon Slavin1

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Since: May 16, 2004
Posts: 543



(Msg. 1) Posted: Fri Jan 25, 2008 9:48 pm
Post subject: Telling which platforms an app is compiled for
Archived from groups: comp>sys>mac>programmer>help (more info?)
I know that OS X 10.5 is very good at cross-platform support but I'm
trying to support or refute some claims by software publishers.

Given a bunch of applications (proper GUI app, not command-line) how do I
tell whether they're PPC, Intel, Universal, 64-bit, ARM (!), etc. ? I
looked at 'otool' but I can't figure out if it helps.

Simon.
--
http://www.hearsay.demon.co.uk

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Dave Seaman

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Since: Jun 25, 2003
Posts: 451



(Msg. 2) Posted: Fri Jan 25, 2008 11:53 pm
Post subject: Re: Telling which platforms an app is compiled for [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
On Fri, 25 Jan 2008 21:48:17 +0000, Simon Slavin wrote:
> I know that OS X 10.5 is very good at cross-platform support but I'm
> trying to support or refute some claims by software publishers.

> Given a bunch of applications (proper GUI app, not command-line) how do I
> tell whether they're PPC, Intel, Universal, 64-bit, ARM (!), etc. ? I
> looked at 'otool' but I can't figure out if it helps.

You can use the "file" command on the executable file. If an app is in
/Applications/Foo.app, then the executable file is probably
/Applications/Foo.app/Contents/MacOS/Foo, and "file Foo" may say
something like:

Foo: Mach-O universal binary with 2 architectures
Foo (for architecture ppc): Mach-O executable ppc
Foo (for architecture i386): Mach-O executable i386

If 64-bit binaries are present, "file" will also tell you about those.




--
Dave Seaman
Oral Arguments in Mumia Abu-Jamal Case heard May 17
U.S. Court of Appeals, Third Circuit
<http://www.abu-jamal-news.com/>

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noreply

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Since: Dec 02, 2004
Posts: 191



(Msg. 3) Posted: Sat Jan 26, 2008 12:51 am
Post subject: Re: Telling which platforms an app is compiled for [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
Simon Slavin
wrote:

> Given a bunch of applications (proper GUI app, not command-line) how do I
> tell whether they're PPC, Intel, Universal, 64-bit, ARM (!), etc. ? I
> looked at 'otool' but I can't figure out if it helps.

the 'file' command will list the architectures for which your binary is
compiled.

patrick
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Simon Slavin1

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Since: May 16, 2004
Posts: 543



(Msg. 4) Posted: Mon Jan 28, 2008 9:42 pm
Post subject: Re: Telling which platforms an app is compiled for [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
On 26/01/2008, Patrick Machielse wrote in message
:

> the 'file' command will list the architectures for which your binary is
> compiled.

Excellent:

SimonsMBP:MacOS simon$ file []Preview
Preview: Mach-O universal binary with 2 architectures
Preview (for architecture i386): Mach-O executable i386
Preview (for architecture ppc7400): Mach-O executable ppc

SimonsMBP:MacOS simon$ file []Gunnar
Gunnar: Mach-O executable ppc

SimonsMBP:DemoApp.app simon$ file []DemoApp
DemoApp: Mach-O executable arm

Okay. So there's some variation depending on whether it has multiple
architecture. I wonder what would happen if one supported three
architectures: would it call it 'universal trinary' ?

Many thanks for the help to both you and Dave Seaman.

Simon.
--
http://www.hearsay.demon.co.uk
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Chris McDonald

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Since: Apr 15, 2004
Posts: 83



(Msg. 5) Posted: Mon Jan 28, 2008 11:02 pm
Post subject: Re: Telling which platforms an app is compiled for [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
Simon Slavin writes:

>..... I wonder what would happen if one supported three
>architectures: would it call it 'universal trinary' ?

For those indecisive bits?

--
Chris.
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noreply

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Since: Dec 02, 2004
Posts: 191



(Msg. 6) Posted: Tue Jan 29, 2008 11:15 am
Post subject: Re: Telling which platforms an app is compiled for [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
Simon Slavin
wrote:

> Okay. So there's some variation depending on whether it has multiple
> architecture. I wonder what would happen if one supported three
> architectures: would it call it 'universal trinary' ?

Out of the box it is trivial to build a '5-way' UB with Xcode. If you
add arm to the mix who knows how crazy you can go? I don't know what the
theoretical upper limit for the number of supported architectures is, or
if one exists...

patrick
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