Toolchain 2.0

This article explains how to build a tool chain for iPhone OS 2.0.

Please note that this section is under development.

Mac OS X

Until a valid iPhone ARM toolchain installer can be legally distributed throughout the public (grr NDA), the alternative is simple. Install the Apple iPhone SDK, and use it's compiler, and specify the correct architecture, like so:

/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc -arch armv6 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS2.1.sdk

For extra headers that you have either obtained from an external source, or dumped from the iphone or iphone simulator frameworks yourself, place them in a custom include directory and pass the -I option through the compiler like so:

..../gcc -I "YOUR INCLUDE DIRECTORY".......

Use saurik's codesign tool (ldid) to sign the binary like so:

ldid -S <binary>

More on this coming soon.

Windows XP

Extraction of iPhone OS 2.0 SDK

Please Note: As of 7-Zip 4.59 Beta, support is available for .DMG and XAR-format archives. 7-Zip is now capable of completely extracting iPhone 2.0 SDK Package.

• Download the iPhone OS 2.0 SDK from Apple iPhone Dev Center.
• Download and install HFSExplorer from catacombae software.
• Start HFSExplorer and choose the menu File→Open UDIF Disk Image (.dmg)...
• Select the iPhone 2.0 SDK disk image iphone_sdk_final.dmg and press Open
• When the tool asks Which partition to read leave it at "Mac_OS_X" (Apple_HFS) and press OK
• Go to Packages and select the package you want to extract, e.g. iPhoneSDKHeadersAndLibs.pkg for the iPhone OS 2.0 header files.
• With right mouse button choose Extract data to extract an installation package.
• Please note that in order to extract this .pkg file on Windows, you must compile xar using Cygwin. Make sure you have libxml2, libxml2-devel, openssl and openssl-devel. You can then follow the instructions below.

Linux

Currently we can only describe how to get the headers from the iPhone OS 2.0 SDK.

Extraction of iPhone OS 2.0 Installation Packages (.pkg)

• Extract iPhoneSDKHeadersAndLibs.pkg from iPhone OS 2.0 SDK:

mount -t hfs -o loop /path/to/iphone_sdk_final.dmg /somepath/somedir

Copy iPhoneSDKHeadersAndLibs.pkg from /somepath/somedir

• Use the eXtensible ARchiver xar to extract the file Payload file containing the actual header files:

xar -xf iPhoneSDKHeadersAndLibs.pkg Payload

• Extract the contents of the resulting Payload file

zcat Payload | cpio -id

or

zcat Payload | cpio -id '*.h'

to extract only all header files included in the package.

Framework Headers

This section assumes that

zcat Payload | cpio -id '*.h'

got used in previous section.

If you want to move all Framework headers into an include directory continue as follows:

• Remove the project XCode templates since they will not be required anymore:

rm -rf Platforms/iPhoneOS.platform/Developer/Library

• Create your target include directory:

mkdir include

• Get just the System and usr directories from the iPhone Os 2.0 SDK and remove the empty Platforms directory hierarchy:

mv Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS2.0.sdk/* .
rmdir -p Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS2.0.sdk/

• Move the Framework headers to current directory and clean-up empty directory hierarchy:

mv System/Library/Frameworks/* .
rmdir -p System/Library/Frameworks/

• Rename/move all Framework header directories into include directory and cleanup

mv AddressBook.framework/Headers include/AddressBook
mv AddressBookUI.framework/Headers include/AddressBookUI
mv AudioToolbox.framework/Headers include/AudioToolbox
mv AudioUnit.framework/Headers include/AudioUnit
mv AVFoundation.framework/Headers include/AVFoundation
mv CFNetwork.framework/Headers include/CFNetwork
mv CoreAudio.framework/Headers include/CoreAudio
mv CoreFoundation.framework/Headers include/CoreFoundation
mv CoreGraphics.framework/Headers include/CoreGraphics
mv CoreLocation.framework/Headers include/CoreLocation
mv Foundation.framework/Headers include/Foundation
mv MediaPlayer.framework/Headers include/MediaPlayer
mv OpenAL.framework/Headers include/OpenAL
mv OpenGLES.framework/Headers include/OpenGLES
mv QuartzCore.framework/Headers include/QuartzCore
mv Security.framework/Headers include/Security
mv SystemConfiguration.framework/Headers include/SystemConfiguration
mv UIKit.framework/Headers include/UIKit
rmdir -p *.framework

• The above commands can also be simplified (and can be applied to other versions of SDKs, for example, iPhone SDK 2.2) using a bash shell command:

for a in *.framework; do mv $a/Headers include/${a%.*}; done
rmdir -p *.framework

• The remaining directories are include with all Framework headers and usr with all system related headers.

• Move the usr/include headers also into new include directory, remove usr/lib since gcc includes will not be needed (at least not on iPhone toolchain), and clean up:

mv usr/include/* include/
rm -rf usr/lib
rmdir -p usr/include/

• You may still remove the Payload file since we don't need it anymore:

rm Payload

• Create a tar file so that you can directly transfer to your iPhone:

tar --group 0 --owner 0 -cvf include.tar include

• You are done.

• Now you may transfer the include.tar to your iPhone (as user root), login to your iPhone via ssh and execute following commands to extract the header files (on your iPhone):

cd /var
tar xf /private/var/root/include.tar

iPhone/iPod Touch

There is a tool chain available after jailbreak from the Cydia installer. You just need to install the GNU C Compiler from Cydia to get the development environment on your iPhone or iPod Touch. BigBoss has some comments on this Toolchain on his webpage Toolchain 2.0.

If you want to use the header files from iPhone OS 2.0, you can obtain them from the iPhone OS 2.0 SDK as described in section Framework Headers.

NOTE: When using iphone-gcc ( the native compiler ) to compile iPhone applications, you must do one of the following:

1. Patch the SDK header files for use with the compiler ( stupid thing doesn't like the new headers! ) or
2. Use the old header files ( which are great, but some things dont work/exist the same anymore! ) or
3. Use the following settings in your Makefile to avoid warnings and errors during compilation and linking:

CC=/usr/bin/gcc

CFLAGS=-fsigned-char -g -ObjC -fobjc-exceptions \
  -Wall -Wundeclared-selector -Wreturn-type -Wnested-externs \
  -Wredundant-decls \
  -Wbad-function-cast \
  -Wchar-subscripts \
  -Winline -Wswitch -Wshadow \
  -I/var/include \
  -I/var/include/gcc/darwin/4.0 \
  -D_CTYPE_H_ \
  -D_BSD_ARM_SETJMP_H \
  -D_UNISTD_H_

CPPFLAGS=

LD=$(CC)

LDFLAGS=-lobjc \
  -F/System/Library/Frameworks \
  -framework CoreFoundation \
  -framework Foundation \
  -framework UIKit \
  -framework CoreGraphics \
  -L/usr/lib -lc /usr/lib/libgcc_s.1.dylib \
  -bind_at_load \
  -multiply_defined suppress

If you want to test the iPhone 2.0 Toolchain, you may use this HelloWorld example.

Misc. Issues

For the iPhone 2.2 SDK headers, you might encounter an error about not finding the stdint.h file when compiling natively on the iPhone. In that case, try this:

 cd /var/include
 ls stdint.h # make sure it doesn't exist
 ln -s gcc/darwin/4.0/stdint.h stdint.h