Re: How to tell whether an executable supports GC?
Re: How to tell whether an executable supports GC?
- Subject: Re: How to tell whether an executable supports GC?
- From: Jean-Daniel Dupas <email@hidden>
- Date: Sat, 9 Aug 2008 10:36:42 +0200
You can also create your own helper tool compiled with GC support and,
that just preflight the bundle you pass as argument and return the
result.
It's a little more works, but it's cleaner too.
Le 9 août 08 à 03:32, André Pang a écrit :
On 08/08/2008, at 3:18 PM, Chris Suter wrote:
You want to look at the __image_info section in the __OBJC segment:
struct objc_image_info {
uint32_t version; // initially 0
uint32_t flags;
};
#define OBJC_IMAGE_SUPPORTS_GC 2
#define OBJC_IMAGE_GC_ONLY 4
Thanks for the heads-up Chris! Thanks to your tip, I settled for a
rather cheap solution that works just fine for me:
/usr/bin/otool -o $PATH | grep -q -2 '__OBJC.__image_info' | grep GC
:)
I'm not 100% sure that otool's installed without the BSD subsystem
being available, but I think that's mandatory now with Leopard. The
GC check is just used for displaying some extra informative text in
a sheet (which plugins aren't GC supported), so if anything fails,
it's not a disaster. I figured it'd be easier than trying to find
some libraries to read in the Mach-O format... considering the
tininess of the problem, it was far too much effort!
--
% Andre Pang : trust.in.love.to.save <http://www.algorithm.com.au/>
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