I'm trying to compile a file from my application,with this action:
- (IBAction)build:(id)sender
{
pid_t pid=fork();
int status;
if(!pid)
{
execl("/Developer/usr/bin/gcc","-o main ~/main.c");
exit(0);
}
waitpid(pid, &status, 0);
}
The file main.c in my home directory is not compiled (I don't find the executable).
And I would know:
1)How to pass arguments to gcc? I am passing ~/main.c, but I would like to pass the filename with full path of my document.How do I get the NSDocument's filename?
2)How do I get the console output?I also need to print the gcc output, how to do this?
Edit: I modified the code to compile the file saved from the application:
- (IBAction)build:(id)sender
{
NSTask *task = [[NSTask alloc] init];
[task setLaunchPath:@"/Developer/usr/bin/gcc"];
[task setArguments: @[@"-o",@"main",[self fileURL]] ];
NSPipe *pipe = [NSPipe pipe];
[task setStandardOutput:pipe];
NSFileHandle *file = [pipe fileHandleForReading];
[task launch];
NSData *data = [file readDataToEndOfFile];
NSString *output = [[NSString alloc] initWithData:data
encoding:NSUTF8StringEncoding];
NSLog (@"gcc output:\n%@", output);
}
But whenever the build method gets executed that's what I get:
2012-11-07 19:04:30.636 Coder[1856:303] -[NSURL fileSystemRepresentation]: unrecognized selector sent to instance 0x100154c40
2012-11-07 19:04:30.638 Coder[1856:303] -[NSURL fileSystemRepresentation]: unrecognized selector sent to instance 0x100154c40
2012-11-07 19:04:30.642 Coder[1856:303] (
0 CoreFoundation 0x00007fff95b060a6 __exceptionPreprocess + 198
1 libobjc.A.dylib 0x00007fff909793f0 objc_exception_throw + 43
2 CoreFoundation 0x00007fff95b9c6ea -[NSObject(NSObject) doesNotRecognizeSelector:] + 186
3 CoreFoundation 0x00007fff95af45ce ___forwarding___ + 414
4 CoreFoundation 0x00007fff95af43b8 _CF_forwarding_prep_0 + 232
5 Foundation 0x00007fff8cbf8e67 -[NSConcreteTask launchWithDictionary:] + 814
6 Coder 0x0000000100001734 -[Document build:] + 452
7 AppKit 0x00007fff8d266a59 -[NSApplication sendAction:to:from:] + 342
8 AppKit 0x00007fff8d2668b7 -[NSControl sendAction:to:] + 85
9 AppKit 0x00007fff8d2667eb -[NSCell _sendActionFrom:] + 138
10 AppKit 0x00007fff8d264cd3 -[NSCell trackMouse:inRect:ofView:untilMouseUp:] + 1855
11 AppKit 0x00007fff8d264521 -[NSButtonCell trackMouse:inRect:ofView:untilMouseUp:] + 504
12 AppKit 0x00007fff8d263c9c -[NSControl mouseDown:] + 820
13 AppKit 0x00007fff8d25b60e -[NSWindow sendEvent:] + 6853
14 AppKit 0x00007fff8d257744 -[NSApplication sendEvent:] + 5761
15 AppKit 0x00007fff8d16d2fa -[NSApplication run] + 636
16 AppKit 0x00007fff8d111cb6 NSApplicationMain + 869
17 Coder 0x00000001000011a2 main + 34
18 libdyld.dylib 0x00007fff93a577e1 start + 0
19 ??? 0x0000000000000003 0x0 + 3
)
trojanfoe code was working, but with this modification it doesn't work.
Use NSTask
instead (reference).
Untested:
NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *sourceFile = [docDir stringByAppendingPathComponent:@"main.c"];
NSString *outFile = [docDir stringByAppendingPathComponent:@"main"];
NSTask *task = [[NSTask alloc] init];
[task setLaunchPath:@"/Developer/usr/bin/gcc"];
[task setArguments:[NSArray arrayWithObjects: @"-o", outFile, sourceFile, nil]];
NSPipe *pipe = [NSPipe pipe];
[task setStandardOutput:pipe];
NSFileHandle *file = [pipe fileHandleForReading];
[task launch];
NSData *data = [file readDataToEndOfFile];
NSString *output = [[NSString alloc] initWithData:data
encoding:NSUTF8StringEncoding];
NSLog (@"gcc output:\n%@", output);
[output release];
[task release];