On 07/apr/08, at 19:43, David Duncan wrote:
for an application targeted for 10.4 I need to access the value of
some key properties defined
for 10.5 in CGImageProperties.h, like
kCGImagePropertyExifAuxDictionary.
Assuming you have your project set properly, standard weak-linking
policies should apply. See the Frameworks Programming Guide on
Frameworks and Weak Linking at <http://developer.apple.com/documentation/MacOSX/Conceptual/BPFrameworks/Concepts/WeakLinking.html
>
I didn't remember this flag. Anyway since I'm having some undefined
symbols I did a small test with 10.5 sdk (xcode 3.0)
#import <Cocoa/Cocoa.h>
#import "ApplicationServices/ApplicationServices.h"
int main(int argc, char *argv[])
{
CFStringRef dictName[] = {
kCGImagePropertyExifAuxDictionary,
kCGImagePropertyDNGDictionary,
};
printf("%p", dictName);
return 0;
}
Ld /tmp/pippo/build/pippo.build/Release/pippo.build/Objects-normal/
i386/pippo normal i386
cd /tmp/pippo
/Developer/usr/bin/gcc-4.0 -o /tmp/pippo/build/pippo.build/
Release/pippo.build/Objects-normal/i386/pippo -L/tmp/pippo/build/
Release -F/tmp/pippo/build/Release -filelist /tmp/pippo/build/
pippo.build/Release/pippo.build/Objects-normal/i386/pippo.LinkFileList
-arch i386 -mmacosx-version-min=10.5 -weak_framework
ApplicationServices -weak_framework Cocoa -isysroot /Developer/SDKs/
MacOSX10.5.sdk
Undefined symbols:
"_kCGImagePropertyDNGDictionary", referenced from:
_kCGImagePropertyDNGDictionary$non_lazy_ptr in main.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
I've tried linking with -framework and -weak_framework with the same
results.
kCGImagePropertyDNGDictionary and others properties declared in
CGImageProperties.h are not defined in the framework.
Is it a bug or am I missing something?
Thank you.
--
Ciao,
Mirko
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