ld64.README

Apple ld64 85.2.1 Linux cross-toolchain patch
Mark Mentovai
2009 March 6

THE DEAL
--------
This patch allows Apple ld64 (the linker) to be built on Linux, forming a
portion of a cross toolchain able to produce Mac OS X binaries.

ACKNOWLEDGEMENTS
----------------
This is similar to odcctools, http://odcctools.darwinports.com/.  odcctools
has not been updated in over two years and does not apply to the latest
toolchain, such as the 10.5/Xcode 3 toolchain.  Some portions of odcctools
were consulted in developing these patches.

REQUIREMENTS
------------
This requires a suitable usr_include be located next to the ld64 directory,
for access to additional Mac headers.  See usr_include_maker.README.

BUILD
-----
cd ld64
CC="gcc -m32 -std=gnu99" CXX="g++ -m32" CFLAGS="-O2" CXXFLAGS="${CFLAGS}" make -f Makefile.linux

Note: -m32 is required on x86_64 systems because ld64 is not 64-bit
tolerant.  Additional libraries or library symbolic links may be needed.

Note: Although ld64 is not tolerant of running in 64-bit mode, it is
perfectly capable of dealing with 64-bit Mach-O objects.

INSTALL
-------
mkdir -p /Developer/usr/bin
cp src/ld64 src/rebase /Developer/usr/bin
ln -sf ld64 /Developer/usr/bin/ld
ln -sf ld /Developer/usr/bin/i686-apple-darwin9-ld
ln -sf ld /Developer/usr/bin/powerpc-apple-darwin9-ld