I installed GNUStep on Ubuntu 12.10, and some tools for Objective-C development. I then tried to compile the following code.
#import <Foundation/Foundation.h>
int main(int *argc, const char *argv[]) {
NSAutorelease *pool = [[NSAutorelease alloc] init];
NSLog(#"hello world");
[pool drain];
return 0;
}
When I compile it with gcc -o hello hello.m -Wall -lobjc, I get the following error.
Foundation/Foundation.h: No such file or directory; compilation terminated.
I find the Foundation library and other libraries in /usr/include/GNUstep/Foundation. Why am I getting that error message?
Related
I've just installed GNUstep, libobjc2, and llvm on a ubuntu 14.04 box using this script. The installation works for most objective-c2.0 features but not for arc. If I run the following simple program, it crashes as soon as it executes #autoreleasepool with a segmentation fault.
#import <Foundation/Foundation.h>
int main(int argc, char * argv[])
{
#autoreleasepool{
NSLog(#"autoreleasepool works...\n");
}
return 0;
}
I'm compiling with the -fobjc-arc flag. Any suggestions? I've spent two days on this searching the internet. If I use NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init] the program runs.
Mark Allyn
So, think the classic beginner C programming right of passage: hello world. But written in Objective-C.
For reasons I prefer not to get into, I don't want to use XCode but rather my new love, Sublime Text.
Can it be done?
Paste the following into Sublime and save the file as main.m
#import <Foundation/Foundation.h>
int main(int argc, char *argv[])
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSLog(#"Hello, World!");
[pool drain];
return 0;
}
Then in the terminal navigate to the file with cd and type:
gcc -framework Foundation main.m -o NAME_OF_YOUR_APP
And run the app by typing:
./NAME_OF_YOUR_APP
I did a bit of digging and found this which lets me build and run entirely within Sublime Text which is what I need. Still testing: https://gist.github.com/chendo/4398077
I have been messing around with GNUStep, and I have a simple main.m, which compiles fine. I wanted to see if objective-c libraries (meant for ios/mac) work with GNUStep, so i downloaded JSONKit and tried to compile that, but I keep getting this error:
mark#Emperor:~/objc-test2$ make
This is gnustep-make 2.6.2. Type 'make print-gnustep-make-help' for help.
Making all for tool Test...
Compiling file JSONKit.m ...
In file included from JSONKit.m:110:0:
JSONKit.h:63:21: warning: "/*" within comment [-Wcomment]
In file included from /usr/include/GNUstep/Foundation/NSAttributedString.h:143:0,
from /usr/include/GNUstep/Foundation/Foundation.h:42,
from JSONKit.h:72,
from JSONKit.m:110:
/usr/include/GNUstep/GNUstepBase/NSAttributedString+GNUstepBase.h:44:1: error: cannot find interface declaration for ‘NSAttributedString’
make[3]: *** [obj/Test.obj/JSONKit.m.o] Error 1
make[2]: *** [internal-tool-all_] Error 2
make[1]: *** [Test.all.tool.variables] Error 2
make: *** [internal-all] Error 2
mark#Emperor:~/objc-test2$
my main.m is this:
mark#Emperor:~/objc-test2$ cat main.m
#import <stdio.h>
#include <Foundation/Foundation.h>
#import "Fraction.h"
#import "JSONKit.h"
int main( int argc, const char *argv[] ) {
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
// create a new instance
Fraction *frac = [[Fraction alloc] init];
// set the values
[frac setNumerator: 1];
[frac setDenominator: 3];
// print it
NSLog(# "The fraction is: %#", [frac print]);
// free memory
[frac release];
NSMutableArray *testArr = [[NSMutableArray alloc] initWithCapacity:0];
[testArr addObject:[NSNumber numberWithInt:2]];
[testArr addObject:#"Hey"];
NSLog([testArr JSONString]);
[pool drain];
return 0;
}
mark#Emperor:~/objc-test2$
I've googled around and I have made sure that i have the GNUStep env variables set, and i'm using a make file (taken from examples online)
mark#Emperor:~/objc-test2$ cat GNUmakefile
include $(GNUSTEP_MAKEFILES)/common.make
TOOL_NAME = Test
Test_OBJC_FILES = main.m Fraction.m JSONKit.m
Test_CPPFLAGS = $(RUNTIME_DEFINE)
# Include in the rules for making Objective-C programs
include $(GNUSTEP_MAKEFILES)/tool.make
mark#Emperor:~/objc-test2$
I really don't get this as /Foundation/NSAttributedString.h clearly contains the interface declaration for NSAttributedString, and NSAttributedString+GNUStepBase.h imports , so any idea on what is going wrong?
int main (int argc, char *argv[])
{
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
NSLog(#"Hello World!");
[pool drain];
return 0;
}
This is my program. I have run it on my friends iMac, and there are no problems with the
code. How do I make the makefiles I have been hearing about on GNUstep?
Have you looked at the GNUstep Makefile tutorial? Also the GNUstep make documentation? You should find common.make in the packages you installed already.
ok i have this program here:
int main(int argc, const char * argv[])
{
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
NSLog (#"Hello world!");
[pool drain];
return 0;
}
the problem is when i compile it with the command
"gcc -framework Foundation prog1.m -o prog1"
i get this:
"gcc: error trying to exec 'cclobj' : execvp: No such file or Directory"
do i need to install any packages??
"
Its not the only way but GNUStep worked for me. For a good writeup on setting it up look here.
Note: Your exact error is listed about halfway down that page. Your missing package seems to be 'gobjc'.
You need to install "gobjc"
Example
gcc -x objective-c -o
check this link Compiling Objective-C using the gcc
http://webcache.googleusercontent.com/search?q=cache:iIgkFc-JoRYJ:https://www.cs.indiana.edu/classes/c304/ObjCompile.html+http://www.it.uc3m.es/mibanez/lao/lab1/tutorial3/ObjCompile.html&cd=1&hl=en&ct=clnk&client=safari