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HOWTO: ARC (libobjc2) and libdispatch on Ubuntu 12.04 Server
From: |
Patryk Laurent |
Subject: |
HOWTO: ARC (libobjc2) and libdispatch on Ubuntu 12.04 Server |
Date: |
Sat, 11 Aug 2012 12:52:58 -0400 |
Greetings,
Below are some step-by-step instructions on installing libobjc2 and libdispatch
on Ubuntu 12.04 server.
Best,
Patryk
# -----------------------------------------------------------------
# Objective C 2.0 on Ubuntu (from source)
# -----------------------------------------------------------------
# PART 1: LIBOBJC2 from source (with ARC)
# PART 2: LIBDISPATCH from source
# ON UBUNTU 12.04 SERVER
# -----------------------------------------------------------------
# Patryk Laurent (plaurent@me.com)
# Step 1 based on David Chisnall
(http://etoileos.com/news/archive/2011/08/14/1206/)
# Step 2 based on Chris Mowforth
http://chris.mowforth.com/installing-grand-central-dispatch-on-linux)
# -----------------------------------------------------------------
# August 11, 2012
# -----------------------------------------------------------------
# ==============================
# ==============================
# PART 1: new libobjc2 on Ubuntu
# ==============================
# ==============================
# --------------------------------------------------------------------
# Some examples to test Objective C and ARC once we get it installed
# --------------------------------------------------------------------
cd ~
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
cat > main.m << EOF
#import <stdio.h>
#import "Fraction.h"
int main( int argc, const char *argv[] ) {
// create a new instance
Fraction *frac = [[Fraction alloc] init];
// set the values
[frac setNumerator: 1];
[frac setDenominator: 3];
// print it
printf( "The fraction is: " );
[frac print];
printf( "\n" );
// free memory
[frac release];
return 0;
}
EOF
cat > mainarc.m << EOF
#import <stdio.h>
#import "Fraction.h"
int main( int argc, const char *argv[] ) {
// create a new instance
Fraction *frac = [[Fraction alloc] init];
// set the values
[frac setNumerator: 1];
[frac setDenominator: 3];
// print it
printf( "The fraction is: " );
[frac print];
printf( "\n" );
// free memory
// [frac release]; // valgrind should show less leakage with -fobjc-arc
return 0;
}
EOF
# -----------------------------------------------------------------
# INITIAL REQUIREMENTS
# -----------------------------------------------------------------
sudo apt-get -y install build-essential subversion clang libicu-dev libxml2-dev
libxml2 libgnutls-dev libssl-dev
#sudo apt-get -y install gnustep # If you want old runtime
#sudo apt-get -y install gnustep-make
#sudo apt-get -y install libgnustep-base-dev
sudo apt-get -y install gobjc # Def required for below.
# --------------------------------------------------------------------
# TEST (may fail w/ segfault if you did not apt-get install gnustep)
# --------------------------------------------------------------------
cd ~
gcc `gnustep-config --objc-flags` main.m Fraction.m -o test -lobjc
-lgnustep-base
./test
clang `gnustep-config --objc-flags` main.m Fraction.m -o test -lobjc
-lgnustep-base
./test
# --------------------------------------------------------------------
# OK, let's install the new GNUstep from Subversion repositories!
# (based on David Chisnall http://etoileos.com/news/archive/2011/08/14/1206/)
# --------------------------------------------------------------------
mkdir gs
cd gs
svn co svn://svn.gna.org/svn/gnustep/tools/make/trunk make
svn co http://svn.gna.org/svn/gnustep/modules/core
svn co svn://svn.gna.org/svn/gnustep/libs/libobjc2/trunk libobjc
# --------------------------------------------------------------------
# 1) Install GNUstep Make a first time.
# --------------------------------------------------------------------
cd ~/gs/make
export CC=clang
export CXX=clang++
./configure --enable-debug-by-default --with-layout=fhs
make && sudo -E make install
. /usr/local/share/GNUstep/Makefiles/GNUstep.sh
cd ..
cd ~/gs/core/base
./configure
make # On this FIRST TIME THRU, WILL SAY CAN'T BUILD NSBLOCKS for
this runtime
sudo make install
cd ..
# --------------------------------------------------------------------
# TEST (the resulting binary will segfault if we don't have a runtime)
# --------------------------------------------------------------------
cd ~
clang `gnustep-config --objc-flags` main.m Fraction.m -o test -lobjc
-lgnustep-base
# --------------------------------------------------------------------
# 2) Build libobjc2
# --------------------------------------------------------------------
cd ~/gs/libobjc
make -f Makefile
sudo make -f Makefile install
cd ..
# --------------------------------------------------------------------
# 3) NOW GO BACK, RECOMPILE GNUStep MAKE (TO DETECT THE NEW OBJC RUNTIME)
# --------------------------------------------------------------------
cd ~/gs/make
./configure --enable-objc-nonfragile-abi --enable-native-objc-exceptions
--with-layout=fhs --enable-debug-by-default CC=clang CXX=clang++
make && sudo -E make install
. /usr/local/share/GNUstep/Makefiles/GNUstep.sh
cd ..
# --------------------------------------------------------------------
# 4) AND THEN RECOMPILE CORE/BASE
# --------------------------------------------------------------------
cd ~/core/base
./configure --disable-mixedabi CC=clang CXX=clang++
make # THIS TIME THRU, NO COMPLAINTS ABOUT BLOCKS
sudo make install
cd ..
# --------------------------------------------------------------------
# 5) FINALLY TEST AGAIN AND ENJOY OBJECTIVE C WITH ARC
# Note that I need to add GNUSTEP-CONFIG --OBJC-LIBS below.
# If you don't want ARC, omit -fobj-arc
# --------------------------------------------------------------------
cd ~
clang `gnustep-config --objc-flags` `gnustep-config --objc-libs` -fobj-arc
-fobjc-nonfragile-abi mainarc.m Fraction.m -o test -lobjc -lgnustep-base
./test
# ==============================
# ==============================
# PART 2: libdispatch on Ubuntu
# ==============================
# ==============================
# --------------------------------------------------------------------
# Some examples to test GCD once we get it installed
# --------------------------------------------------------------------
cd ~
cat > helloGCD.c << EOF
#include <dispatch/dispatch.h>
#include <stdio.h>
int main() {
dispatch_queue_t queue = dispatch_queue_create(NULL, NULL);
dispatch_sync(queue, ^{
printf("Hello, world from a dispatch queue!\n");
});
dispatch_release(queue);
return 0;
}
EOF
cat > helloGCD_objc.c << 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
# --------------------------------------------------------------------
# INSTALLING LIBDISPATCH
# (based on Chris Mowforth
http://chris.mowforth.com/installing-grand-central-dispatch-on-linux)
# --------------------------------------------------------------------
sudo apt-get install clang libblocksruntime-dev libkqueue-dev
# Visit http://packages.ubuntu.com/oneiric/libpthread-workqueue0 for download
links
# Visit http://packages.ubuntu.com/oneiric/libpthread-workqueue-dev for
download link
mkdir dispatch
cd dispatch
sudo apt-get install make autoconf autogen libtool build-essential gcc-multilib
sudo apt-get install pkg-config
wget
http://mirror.pnl.gov/ubuntu//pool/universe/libp/libpthread-workqueue/libpthread-workqueue0_0.8.2-1_amd64.deb
wget
http://mirror.pnl.gov/ubuntu//pool/universe/libp/libpthread-workqueue/libpthread-workqueue-dev_0.8.2-1_amd64.deb
sudo dpkg -i libpthread-workqueue0_0.8.2-1_amd64.deb
sudo dpkg -i libpthread-workqueue-dev_0.8.2-1_amd64.deb
wget
http://archive.ubuntu.com/ubuntu/pool/universe/libd/libdispatch/libdispatch_0~svn197.orig.tar.gz
tar xvfz libdispatch_0~svn197.orig.tar.gz
cd libdispatch-0~svn197/
export CC=clang
export CXX=clang++
make distclean
./configure
make
# dispatch_starfish.o: In function `_dispatch_time_mach2nano':
# dispatch_starfish.c:(.text+0x5bc): undefined reference to
`_dispatch_host_time_data'
# dispatch_starfish.c:(.text+0x5ea): undefined reference to
`_dispatch_get_host_time_init'
# /usr/bin/ld: .libs/dispatch_starfish: hidden symbol
`_dispatch_host_time_data' isn't defined
# /usr/bin/ld: final link failed: Bad value
# clang: error: linker command failed with exit code 1 (use -v to see
invocation)
# make[1]: *** [dispatch_starfish] Error 1
# make[1]: Leaving directory
`/home/patryk/dispatch/libdispatch-0~svn197/testing'
# make: *** [all-recursive] Error 1
# --------------------------------------------------------------------
# To fix compile, comment out build of "testing" from Makefile
# --------------------------------------------------------------------
make clean
sed "s/testing/#testing/" Makefile > Makefile.new
mv Makefile.new Makefile
make
sudo make install
sudo ldconfig
# --------------------------------------------------------------------
# Testing
# --------------------------------------------------------------------
# Plain C: When not compiling with libobjc2 (just plain C) on Ubuntu you must
add -lBlocksRuntime
# --------------------------------------------------------------------
clang -o hi helloGCD.c -fblocks -ldispatch -lBlocksRuntime
./hi
clang -o hi helloGCD.c -fblocks -ldispatch
# /usr/bin/ld: /tmp/helloGCD-eXxFYY.o: undefined reference to symbol
'_NSConcreteGlobalBlock'
# /usr/bin/ld: note: '_NSConcreteGlobalBlock' is defined in DSO
/usr/lib/libBlocksRuntime.so.0
# so try adding it to the linker command line
# /usr/lib/libBlocksRuntime.so.0: could not read symbols: Invalid operation
# clang: error: linker command failed with exit code 1 (use -v to see
invocation)
# --------------------------------------------------------------------
# Compiling Objective C with ARC and blocks and libdispatch
# --------------------------------------------------------------------
# Note: do not use -lBlocksRuntime here since Apple on is not
# compatible with the libobjc2 one which has its own. (Note from
# David Chisnall)
# --------------------------------------------------------------------
clang `gnustep-config --objc-flags` `gnustep-config --objc-libs` -fobj-arc
-fobjc-nonfragile-abi -fblocks helloGCD_objc.m Fraction.m -o test -lobjc
-lgnustep-base -ldispatch
./test
- HOWTO: ARC (libobjc2) and libdispatch on Ubuntu 12.04 Server,
Patryk Laurent <=