Swift and Stack smashing protection

Question

How to enable Stack Smashing Protection in pure swift application?

I did try to put \"-fstack-protector-all\" flag to Other C++ Flags under project build settings t

Answer 1

I was also facing this in my 100% Swift project.

Whenever I added -fstack-protector-all to the "Other C-Flags" Build Settings the flags did not show up in the binary as described in the other comments.

What I did was to create an Objective-C Class…

// DummyClassForSSP.h
#import 

NS_ASSUME_NONNULL_BEGIN

@interface DummyClassForSSP : NSObject
+ (void)dummyCallSoFlagsShowUpInIPA;
@end

NS_ASSUME_NONNULL_END

… added a dummy implementation …

// DummyClassForSSP.m
#import "DummyClassForSSP.h"

@implementation DummyClassForSSP

+ (void)dummyCallSoFlagsShowUpInIPA {}

@end

… and called it from my AppDelegate.

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
....
DummyClassForSSP.dummyCallSoFlagsShowUpInIPA()
...
}

After that the flags showed up as described.