Current Version: 877.5 + ld64-253.3.
Originally ported by cjacker.

SUPPORTED OPERATING SYSTEMS:

Linux, FreeBSD, NetBSD, OpenBSD, DragonFlyBSD,
Windows (Cygwin), Mac OS X and iOS

SUPPORTED HOST ARCHITECTURES:

x86, x86_64, arm

Untested, but compiles:

aarch64, ppc, ppc64

armv4t, armv5, armv6, armv7, armv7f, armv7k, armv7s, armv6m
armv7m, armv7em, armv8, arm64, arm64v8, i386, x86_64 and x86_64h.

Mac OS X, iOS, watchOS (untested) and tvOS (untested)

Clang 3.2+ or gcc/g++/gcc-objc 4.7+, automake, autogen and libtool.

Optional, but recommended:

llvm-devel (For Link Time Optimization Support)
uuid-devel (For ld64 -random_uuid Support)
llvm-devel + xar-devel (For ld64 -bitcode_bundle Support)

You can find xar here.
Do not install libxar-dev on Ubuntu, it's a different package.

• cd cctools
• ./autogen.sh
• ./configure --prefix=<installdir> --target=<target> [--with-llvm-config=...]
• make
• make install

target = i386-apple-darwin11, x86_64-apple-darwin11, arm-apple-darwin11, ...

If you get compile errors because of unistd.h, then please run
../tools/fix_unistd_issue.sh and restart compiling.