Build failure on Darwin

[jahanian]

If I ifdef out this code in: lib/Support/Unix/Signals.inc clang builds.

// #if defined(__APPLE__) && defined(ENABLE_CRASH_OVERRIDES)
#if 0
  // Environment variable to disable any kind of crash dialog.
  if (getenv("LLVM_DISABLE_CRASH_REPORT")) {
    mach_port_t self = mach_task_self();
    
    exception_mask_t mask = EXC_MASK_CRASH;
    
    kern_return_t ret = task_set_exception_ports(self,
                             mask,
                             MACH_PORT_NULL,
                             EXCEPTION_STATE_IDENTITY | MACH_EXCEPTION_CODES,
                             THREAD_STATE_NONE);
    (void)ret;
  }
#endif

Problem is that this code depends on headers not yet included.
Further down we have:
#if defined(__APPLE__) && defined(ENABLE_CRASH_OVERRIDES)

#include <signal.h>
#include <pthread.h>

Any clues as to why it just fails for me (or no one has tried this on MacOSX recently).

- fariborz

> On Apr 3, 2015, at 8:58 AM, jahanian <fjahanian at apple.com> wrote:
> 
> I am getting this build failure building llvm on Darwin.
> 
> llvm[1]: Compiling SpecialCaseList.cpp for Debug+Asserts build
> In file included from /Users/fjahanian/sandbox/llvm-tot/lib/Support/Signals.cpp:30:
> /Users/fjahanian/sandbox/llvm-tot/lib/Support/Unix/Signals.inc:495:5: error: unknown type name 'mach_port_t'
>     mach_port_t self = mach_task_self();
>     ^
> /Users/fjahanian/sandbox/llvm-tot/lib/Support/Unix/Signals.inc:495:24: error: use of undeclared identifier 'mach_task_self'
>     mach_port_t self = mach_task_self();
>                        ^
> /Users/fjahanian/sandbox/llvm-tot/lib/Support/Unix/Signals.inc:497:5: error: unknown type name 'exception_mask_t'
>     exception_mask_t mask = EXC_MASK_CRASH;
>     ^
> /Users/fjahanian/sandbox/llvm-tot/lib/Support/Unix/Signals.inc:497:29: error: use of undeclared identifier 'EXC_MASK_CRASH'
>     exception_mask_t mask = EXC_MASK_CRASH;
>                             ^
> llvm[1]: Compiling Statistic.cpp for Debug+Asserts build
> /Users/fjahanian/sandbox/llvm-tot/lib/Support/Unix/Signals.inc:499:5: error: unknown type name 'kern_return_t'
>     kern_return_t ret = task_set_exception_ports(self,
>     ^
> /Users/fjahanian/sandbox/llvm-tot/lib/Support/Unix/Signals.inc:501:30: error: use of undeclared identifier 'MACH_PORT_NULL'
>                              MACH_PORT_NULL,
>                              ^
> /Users/fjahanian/sandbox/llvm-tot/lib/Support/Unix/Signals.inc:502:30: error: use of undeclared identifier 'EXCEPTION_STATE_IDENTITY'
>                              EXCEPTION_STATE_IDENTITY | MACH_EXCEPTION_CODES,
>                              ^
> /Users/fjahanian/sandbox/llvm-tot/lib/Support/Unix/Signals.inc:502:57: error: use of undeclared identifier 'MACH_EXCEPTION_CODES'
>                              EXCEPTION_STATE_IDENTITY | MACH_EXCEPTION_CODES,
>                                                         ^
> /Users/fjahanian/sandbox/llvm-tot/lib/Support/Unix/Signals.inc:503:30: error: use of undeclared identifier 'THREAD_STATE_NONE'
>                              THREAD_STATE_NONE);
>                              ^
> 9 errors generated.
> 
> 
> - Fariborz
> 
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