Re: pthread compilation problems

[Stefan Bidigaray]

The issue here, from what I can tell, is that pthread.h is not included in the right spot. It should be included in EngineController.h, not main.m like what you're doing. The error is essentially saying the pthread functions are not declared anywhere.

On Sep 15, 2015 1:57 PM, "Robert Peterson" <rob.ross.peterson@gmail.com> wrote:

cross-post from: http://stackoverflow.com/questions/32555122/iso-c-forbids-declaration-of-pthread-cond-t-with-no-type

I'm getting some errors while trying to compile objective-c code that I didn't originally write. The platform is GNUstep on Windows 10. I'm very new to all this, so I suspect I'm making an elementary mistake.

Help!

Compilation Errors:

$ make
This is gnustep-make 2.6.5. Type 'make print-gnustep-make-help' for help.
Making all for tool stockfish...
 Compiling file main.m ...
 Compiling file EngineController.mm ...
In file included from EngineController.mm:1:0:
EngineController.h:6:4: error: ISO C++ forbids declaration of 'pthread_cond_t' with no type [-fpermissive]
EngineController.h:6:19: error: expected ';' before 'WaitCondition'
EngineController.h:7:4: error: ISO C++ forbids declaration of 'pthread_mutex_t' with no type [-fpermissive]
EngineController.h:7:20: error: expected ';' before 'WaitConditionLock'
EngineController.mm: In function '-[EngineController initEngine]':
EngineController.mm:10:27: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
EngineController.mm:13:27: error: 'WaitConditionLock' was not declared in this scope
EngineController.mm:13:50: error: 'pthread_mutex_init' was not declared in this scope
EngineController.mm:14:26: error: 'WaitCondition' was not declared in this scope
EngineController.mm:14:45: error: 'pthread_cond_init' was not declared in this scope
EngineController.mm:18:12: warning: 'objc_object* objc_get_class(const char*)' is deprecated (declared at C:/GNUstep/GNUstep/System/Library/Headers/objc/runtime-deprecated.h:30) [-Wdeprecated-declarations]
make[3]: *** [obj/stockfish.obj/EngineController.mm.o] Error 1
make[2]: *** [internal-tool-all_] Error 2
make[1]: *** [stockfish.all.tool.variables] Error 2
make: *** [internal-all] Error 2

GNUmakefile

include $(GNUSTEP_MAKEFILES)/common.make

TOOL_NAME = stockfish
stockfish_OBJC_FILES = main.m
stockfish_OBJCC_FILES = EngineController.mm

include $(GNUSTEP_MAKEFILES)/tool.make

main.m

#import <Foundation/Foundation.h>
#import <pthread.h>
#import <EngineController.h>

int
main (void)
{ 

  [[Controller alloc] init];

  return 0;
}

EngineController.h

#import <Foundation/Foundation.h>

@class Controller;

@interface EngineController : NSObject {
   pthread_cond_t WaitCondition;
   pthread_mutex_t WaitConditionLock;
   BOOL ignoreBestmove;
   BOOL engineThreadShouldStop;
   BOOL engineThreadIsRunning;
   BOOL engineIsThinking;
}

@property (nonatomic, readonly) BOOL engineIsThinking;
@property (nonatomic, readonly) BOOL engineThreadIsRunning;

- (void)initEngine;

@end

extern EngineController *GlobalEngineController;

EngineController.mm

#import "EngineController.h"

EngineController *GlobalEngineController;

@implementation EngineController

@synthesize engineIsThinking, engineThreadIsRunning;

- (void)initEngine {
   if (self = [super init]) {

      // Initialize locks and conditions
      pthread_mutex_init(&WaitConditionLock, NULL);
      pthread_cond_init(&WaitCondition, NULL);

      // Start engine thread
      NSThread *thread =
         [[NSThread alloc] initWithTarget: self
                                 selector: @selector(startEngine:)
                                   object: nil];
      [thread setStackSize: 0x100000];
      [thread start];
      [thread release];

      ignoreBestmove = NO;
      engineIsThinking = NO;
   }
   GlobalEngineController = self;
}

@end

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