Re: [Qemu-devel] [PATCH] fix missing event_notifier_init_fd() function on Mac OS X

[Markus Armbruster <armbru@redhat.com>]

[Wasn't delivered correctly by eggs.gnu.org, resending]

Paolo Bonzini <pbonzini@redhat.com> writes:

> On 30/03/2016 18:35, Programmingkid wrote:
>> Remove macro that prevents event_notifier_init_fd() function from being compiled on Mac OS X.
>> 
>> This patch fixes this error:
>> 
>> Undefined symbols for architecture x86_64:
>>   "_event_notifier_init_fd", referenced from:
>>       _process_msg in ivshmem.o
>> ld: symbol(s) not found for architecture x86_64
>> collect2: error: ld returned 1 exit status
>> make[1]: *** [qemu-system-ppc] Error 1
>> make: *** [subdir-ppc-softmmu] Error 2
>> 
>> 
>> Signed-off-by: John Arbuckle <programmingkidx@gmail.com>
>
> This is intentional, this feature of ivshmem.o could never work on OS X.
>  I am not sure that failing the build is intentional.  Markus, any clue?

ivshmem.o should only be linked when CONFIG_EVENTFD is set.  pci.mak has

    CONFIG_IVSHMEM=$(CONFIG_EVENTFD)

The compile error shown above indicates CONFIG_EVENTFD=y for make (since
ivshmem.o gets linked), but !defined(CONFIG_EVENTFD) for C (or else
event_notifier_init_fd() would exist).  Your build tree is messed up, or
the makefiles are broken.  Try starting over with a fresh build tree.