[cfe-dev] linking with libclang for ios

[Anton Smirnov]

I've found Mutex.cpp file in llvm sources and it seems it's not the first
mutex-related call in constructor.
This makes me think it's really absent method in system libs:

// Construct a Mutex using pthread calls

MutexImpl::MutexImpl( bool recursive)

  : data_(0)

{

  // Declare the pthread_mutex data structures

  pthread_mutex_t* mutex =

    static_cast<pthread_mutex_t*>(malloc(sizeof(pthread_mutex_t)));

  pthread_mutexattr_t attr;


  // Initialize the mutex attributes

  int errorcode = pthread_mutexattr_init(&attr);

  assert(errorcode == 0); (void)errorcode;


  // Initialize the mutex as a recursive mutex, if requested, or normal

  // otherwise.

  int kind = ( recursive  ? PTHREAD_MUTEX_RECURSIVE : PTHREAD_MUTEX_NORMAL
);

  errorcode = pthread_mutexattr_settype(&attr, kind);

  assert(errorcode == 0);


#if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__)
&& \

    !defined(__DragonFly__) && !defined(__Bitrig__)

  // Make it a process local mutex

  errorcode = pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_PRIVATE);

  assert(errorcode == 0);

#endif


  // Initialize the mutex

  errorcode = pthread_mutex_init(mutex, &attr);

  assert(errorcode == 0);


  // Destroy the attributes

  errorcode = pthread_mutexattr_destroy(&attr); // fails here

  assert(errorcode == 0);

  // Assign the data member
  data_ = mutex;

}

I've marked where it fails.
How can that be that previous mutex-related methods success and this one
fails?
What can i do to fix it?

Regards, Anton.


2014-07-05 19:31 GMT+06:00 Anton Smirnov <dev at antonsmirnov.name>:

> Hi.
>
> I was able to cross-compile llvm/clang for i386 and i'm trying to use it
> in my ios app.
> Also i was able to add headers and static libs (both libLLVM*.a and
> libclang*.a) and compile/link the project with no errors.
>
> But when trying to run simple app i'm getting error:
>
> *Detected an attempt to call a symbol in system libraries that is not
> present on the iPhone:*
>
> *pthread_mutexattr_destroy$UNIX2003 called from function
> _ZN4llvm3sys9MutexImplC2Eb in image LibClangUsageDemo3.*
>
> What can i do in order to fix it?
>
> Is it llvm/clang issue or i'm doing smth wrong?
>
> Regards, Anton.
>
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