= How to build Cocotron =

At this point you should have a [wiki:Build_GCC working GCC] patched for NEXT Objective-C runtime.

''Tools required: subversion, obj-c patched gcc, make, cmake''

Go and grab cocotron from subversion:
{{{
svn checkout http://cocotron.googlecode.com/svn/trunk cocotron-trunk
}}}

Building cocotron's Foundation is not as simple as GCC, so I'll be commenting all the steps. 

{{{
cd cocotron-trunk/Foundation # we're building only Foundation
}}}
get the build script from this ticket: http://code.google.com/p/cocotron/issues/detail?id=168 and put it in current directory
{{{
mkdir build
cd build
cmake -DCMAKE_C_COMPILER=/opt/objc/bin/gcc \
    -DCMAKE_CXX_COMPILER=/opt/objc/bin/g++ \
    -DCMAKE_INSTALL_PREFIX=/opt/objc ..
}}}

If you have cocotron trunk r242 or below do and fix one nasty bug:

at Foundation/NSInvocation.m  line 438 change
{{{
#ifndef WIN32
}}}
to
{{{
#if 0
}}}
as this bug fires on linux too.

Now you're ready to build Cocotron:
{{{
cd build
make
sudo make install
}}}

== Test code ==
{{{
#import <Foundation/Foundation.h>

int main(int argc, char *argv[])
{
        NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
        NSLog(@"Hello, Objective-C World!");

        [pool drain];
        return 0;
}
}}}

Build with:
{{{
/opt/objc/bin/gcc test.m -o test -I/opt/objc/include -L/opt/objc/lib -lFoundation -lpthread -ldl
}}}

You might also be interested in adding /opt/objc/lib into your /etc/ld.so.conf and running ldconfig