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OS X - Development and Darwin Discussion and questions about development for Mac OS X.

having problems with xcode build

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Member Since: Aug 12, 2010
Posts: 1
ironhide707 is on a distinguished road

ironhide707 is offline
hi all,
This is my first post in this forum. I hope i will get what i want :-). Anyways here it goes.
I recently made a I/O Kit driver on xcode in mac os x leopard. Everything is working fine except for the build, whenever i click the build it shows me this error:

incompatible flag -framework used (must specify "-dynamic" to be used)
Command /Developer/usr/bin/g++-4.0 failed with exit code 1.

Please tell me what is the problem with this code.
For obvious reasons. i have the code here and a picture of the error with with the project tree on the left-side:

#include <unistd.h>
#import <IOKit/storage/IOMedia.h>
#import <CoreFoundation/CoreFoundation.h>
#import <IOKit/IOKitLibs.h>

printDictionaryAsXML(CFDictionaryRef dict)
CFDataRef xml = CFPropertyListCreateXMLData(kCFAllocatorDefault,
if (!xml)
return -1;

write(STDOUT_FILENO, CFDataGetBytePtr(xml), CFDataGetLength(xml));

return 0;

matchingCallback(void *refcon, io_iterator_t deviceList)
kern_return_t kr;
CFDictionaryRef properties;
io_registry_entry_t device;

// Iterate over each device in this notification.
while ((device = IOIteratorNext(deviceList))) {

// Populate a dictionary with device's properties.
kr = IORegistryEntryCreateCFProperties(
device, (CFMutableDictionaryRef *)&properties,
kCFAllocatorDefault, kNilOptions);

if (kr == KERN_SUCCESS)

if (properties)

if (device)

CFMutableDictionaryRef match;
IONotificationPortRef notifyPort;
CFRunLoopSourceRef notificationRunLoopSource;
io_iterator_t notificationIn, notificationOut;

// Create a matching dictionary for all IOMedia objects.
if (!(match = IOServiceMatching("IOMedia"))) {
fprintf(stderr, "*** failed to create matching dictionary.\n");

// Create a notification object for receiving I/O Kit notifications.
notifyPort = IONotificationPortCreate(kIOMasterPortDefault);

// Get a CFRunLoopSource that we will use to listen for notifications.
notificationRunLoopSource = IONotificationPortGetRunLoopSource(notifyPort);

// Add the CFRunLoopSource to the default mode of our current run loop.
CFRunLoopAddSource(CFRunLoopGetCurrent(), notificationRunLoopSource,
// One reference of the matching dictionary will be consumed when we install
// a notification request. Since we need to install two such requests (one
// for ejectable media coming in and another for it going out), we need
// to increment the reference count on our matching dictionary.

// Install notification request for matching objects coming in.
// Note that this will also look up already existing objects.
notifyPort, // notification port reference
kIOMatchedNotification, // notification type
match, // matching dictionary
matchingCallback, // this is called when notification fires
NULL, // reference constant
&notificationIn); // iterator handle

// Install notification request for matching objects going out.

// Invoke callbacks explicitly to empty the iterators/arm the notifications.
matchingCallback(0, notificationIn);
matchingCallback(0, notificationOut);

CFRunLoopRun(); // run


Hope you will help me.
QUOTE Thanks

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