[cfe-dev] linking with libclang for ios

[Alp Toker]

Did you try building with LLVM_ENABLE_THREADS off?

Also consider trying ToT to get the latest fixes.

Alp.


On 06/07/2014 08:23, Anton Smirnov wrote:
> 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 
> <mailto: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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