Latest revision as of 21:05, 17 April 2022

Usually it is a good a idea to just use the package manager of your distribution to get a stable and well integrated GNUstep environment:

sudo apt-get install gnustep gnustep-devel

If you want to develop new apps and try the newest features consider the approach described below.

Compiling Everything from Scratch

The following repo contains scripts that compile and install everything needed for GNUstep Objective-C 2.0. The script uses clang and libobjc2 for all the awesome new features like ARC, blocks/Grand Central Dispatch, etc.

For example, to build GNUstep under Ubuntu 19.04, do:

git clone https://github.com/plaurent/gnustep-build
cd gnustep-build/ubuntu-19.04-clang-8.0-runtime-2.0/
./GNUstep-buildon-ubuntu1904.sh

The demo.sh and demo-gui.sh scripts show example code and compilation examples (using command line as well as the recommended GNUmakefile approach.)

Reference manuals for GNUStep, including available APIs, etc, are available at http://www.gnustep.org/developers/documentation.html

General Note: When compiling your own code, it is generally good to tell clang both the family and version of the runtime: -fobjc-runtime=gnustep-2.0 (The current version number can be had by looking at the latest ANNOUNCE filename in https://github.com/gnustep/libobjc2 (e.g., ANNOUNCE.1.8.1))

Difference between revisions of "GNUstep under Ubuntu Linux"

Latest revision as of 21:05, 17 April 2022

Compiling Everything from Scratch

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-Objective C 2.0 on a fresh install of Ubuntu 12.10 Server
+Usually it is a good a idea to just use the package manager of your distribution to get a stable and well integrated GNUstep environment:
-* Uses llvm/clang source to ensure all the latest features are available.
+ sudo apt-get install gnustep gnustep-devel
-* Also works on Ubuntu 13.10 Desktop.
-* Instructions for installing GUI and the (Cairo) graphics backend have been appended.
-General Notes:
+If you want to develop new apps and try the newest features consider the approach described below.
-* Note: -fobjc-arc is not included in the guitest.m compilation line because the resulting binary will not run correctly right now.
-* When compiling, it is good to tell clang both the family and version of the runtime: -fobjc-runtime=gnustep-1.7
-* The current version number can be had by looking at the latest ANNOUNCE filename in http://svn.gna.org/svn/gnustep/libs/libobjc2/trunk/ (e.g., ANNOUNCE.1.7)
-<pre>
+= Compiling Everything from Scratch  =
-# Objective C 2.0 on a fresh install of Ubuntu 12.10 Server
-sudo apt-get install aptitude
+The following repo contains scripts that  compile and install everything needed for GNUstep Objective-C 2.0.  The script uses clang and libobjc2 for all the awesome new features like ARC, blocks/Grand Central Dispatch, etc.
-# Dependencies
-sudo aptitude install build-essential git subversion ninja cmake
-# Dependencies for GNUStep Base
-sudo aptitude install libffi-dev libxml2-dev libgnutls-dev libicu-dev
-# Dependencies for libdispatch
-sudo aptitude install libblocksruntime-dev libkqueue-dev libpthread-workqueue-dev autoconf libtool
-cd ~
-git clone git://github.com/nickhutchinson/libdispatch.git
-svn co http://svn.gna.org/svn/gnustep/modules/core
-svn co http://svn.gna.org/svn/gnustep/libs/libobjc2/trunk libobjc2
-svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm
-cd llvm/tools
-svn co http://llvm.org/svn/llvm-project/cfe/trunk clang
-cd ~/llvm
+For example, to build GNUstep under Ubuntu 19.04, do:
-mkdir build
-cd build
-cmake ..
-make -j8   # 8=your number of build CPUs
-echo "export PATH=\$PATH:~/llvm/build/bin" >> ~/.bashrc
+ git clone https://github.com/plaurent/gnustep-build
-echo "export CC=clang"  >> ~/.bashrc
+  cd gnustep-build/ubuntu-19.04-clang-8.0-runtime-2.0/
-echo "export CXX=clang++" >> ~/.bashrc
+ ./GNUstep-buildon-ubuntu1904.sh
-source ~/.bashrc
-clang -v
-clang++ -v
-cd ~/libobjc2
+The demo.sh and demo-gui.sh scripts show example code and compilation examples (using command line as well as the recommended GNUmakefile approach.)
-mkdir build
-cd build
-cmake ..
-make -j8
-sudo -E make install
-cd ~/core/make
+Reference manuals for GNUStep, including available APIs, etc, are available at http://www.gnustep.org/developers/documentation.html
-./configure --enable-debug-by-default --with-layout=gnustep
-make && sudo -E make install
-echo ". /usr/GNUstep/System/Library/Makefiles/GNUstep.sh" >> ~/.bashrc
-source ~/.bashrc
-sudo /sbin/ldconfig  # Step required under Ubuntu 13.10
+General Note: When compiling your own code, it is generally good to tell clang both the family and version of the runtime: -fobjc-runtime=gnustep-2.0
+(The current version number can be had by looking at the latest ANNOUNCE filename in https://github.com/gnustep/libobjc2 (e.g., ANNOUNCE.1.8.1))
-cd ~/core/base/
-./configure
-make -j8
-sudo -E make install
-cd ~/libdispatch
-sh autogen.sh
-./configure CFLAGS="-I/usr/include/kqueue" LDFLAGS="-lkqueue -lpthread_workqueue -pthread -lm"
-make -j8
-sudo -E make install
-sudo ldconfig
-# ----------------------------------------------------------------------------------------
-# TEST COMPILING SOME CODE FROM THE INTERNET
-# ----------------------------------------------------------------------------------------
-You can compile the following code with:
-clang `gnustep-config --objc-flags` `gnustep-config --objc-libs` -fobjc-runtime=gnustep -fblocks -fobj-arc -lobjc  blocktest.m
-clang `gnustep-config --objc-flags` `gnustep-config --objc-libs` -fobj-arc -fobjc-runtime=gnustep -fblocks -fobj-arc -lobjc -ldispatch -lgnustep-base  Fraction.m helloGCD_objc.m
-cat > blocktest.m << EOF
-#include <stdio.h>
-int main() {
-    void (^hello)(void) = ^(void) {
-        printf("Hello, block!\n");
-    };
-    hello();
-    return 0;
-}
-EOF
-cat > helloGCD_objc.m << EOF
-#include <dispatch/dispatch.h>
-#import <stdio.h>
-#import "Fraction.h"
-int main( int argc, const char *argv[] ) {
-   dispatch_queue_t queue = dispatch_queue_create(NULL, NULL);
-   Fraction *frac = [[Fraction alloc] init];
-   [frac setNumerator: 1];
-   [frac setDenominator: 3];
-   // print it
-   dispatch_sync(queue, ^{
-     printf( "The fraction is: " );
-     [frac print];
-     printf( "\n" );
-   });
-   dispatch_release(queue);
-   return 0;
-}
-EOF
-cat > Fraction.h << EOF
-#import <Foundation/NSObject.h>
-@interface Fraction: NSObject {
-   int numerator;
-   int denominator;
-}
--(void) print;
--(void) setNumerator: (int) n;
--(void) setDenominator: (int) d;
--(int) numerator;
--(int) denominator;
-@end
-EOF
-cat > Fraction.m << EOF
-#import "Fraction.h"
-#import <stdio.h>
-@implementation Fraction
--(void) print {
-   printf( "%i/%i", numerator, denominator );
-}
--(void) setNumerator: (int) n {
-   numerator = n;
-}
--(void) setDenominator: (int) d {
-   denominator = d;
-}
--(int) denominator {
-   return denominator;
-}
--(int) numerator {
-   return numerator;
-}
-@end
-EOF
-# ------------------------------------------------------
-# ADDITIONAL OPTIONAL STEPS FOR INSTALLING GUI AND BACK
-# (i.e., if you're running Ubuntu Desktop)
-# ------------------------------------------------------
-sudo aptitude install libjpeg-dev libtiff-dev
-sudo aptitude install libcairo-dev libx11-dev:i386 libxt-dev
-cd ~/core/gui
-./configure
-make -j8
-sudo -E make install
-cd ~/core/back
-./configure
-make -j8
-sudo -E make install
-You can compile the following code with:
-clang `gnustep-config --objc-flags` `gnustep-config --objc-libs`  -fobjc-runtime=gnustep -fblocks -lobjc -ldispatch -lgnustep-base -lgnustep-gui  guitest.m
-cat > guitest.m << EOF
-#import <AppKit/AppKit.h>
-int main()
-{
-NSApplication *app;  // Without these 2 lines, seg fault may occur
-app = [NSApplication sharedApplication];
-NSAlert * alert = [[NSAlert alloc] init];
-[alert setMessageText:@"Hello alert"];
-[alert addButtonWithTitle:@"All done"];
-[alert runModal];
-}
-EOF
-</pre>