Add new package "xpwn" from @dborca's fork.

This really hase some nice utilities for coping with HFS+ and DMG
format. We're going to use it for extracting the xcode DMG, but it could
be used for more, even generating DMGs.

The reason I'm using the fork instead of the repository from
@planetbeing is thet the fork contains a few fixes, especially for
dealing with symlinks in HFS+ images.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Add new package for Apple's XCode.

This package provides the SDK and standard library needed for
cross-compiling to Mac US X. We're using xpwn here to extract the DMG.

Also, this version (XCode 5.0.2) only contains the SDKs for version 10.9
and 10.8, so we might need to add requireFile directives for older
versions as well.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Add a cross-platform port of cctools.

This basically is binutils for Mac OS X, but ported to work on
(GNU/)Linux and FreeBSD.

And it's up-to-date as well! I'm mentioning this, because it was quite
hard to find a recent port of it and I just accidentally stumbled on it
while trying to do the port by myself.

So thanks to @tpoechtrager for doing this.

Also, I've added two more patches, which essentially are:

 * ld-rpath-nonfinal:
     This allows -rpath to be used for linking non-final builds, which
     was allowed for earlier versions of cctools and got a check for
     that in more recent versions.

 * ld-ignore-rpath-link:
     Ignores the -rpath-link option, because the cross-wrapper uses it
     in different places. Unfortunately, the cctools linker doesn't
     support it, so we might need to implement this later if it's
     possible (I'm not a Mach-O man^H^H^Hexpert).

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
gcc-4.8: Hook in cross-darwin libc and binutils.

Let's finally hook everything into the existing cross-building
infrastructure. We're using --with-sysroot instead of --with-headers
here, because the XCode SDK contains references to /usr/lib.

I've tried to patch those references, but unfortunately (at least with
install_name_tool) it isn't possible to change those refernces in stub
dylibs.

So after bugging @tpoechtrager with annoying questions (thanks again), I
think my initial approach (patching the SDK itself and/or regenerating
the dylib stubs) was way to complicated so I ended up with this
implementation.

Also, I've added a condition to binutilsCross to use cctools if the libc
is set to libSystem. This might need some cleanups someday, mainly to
figure out how to properly bridge cctools and binutils.

So, as an example on how to cross-compile GNU Hello to Darwin, you can
use something like this:

(import <nixpkgs> {
  crossSystem = {
    config = "x86_64-apple-darwin13";
    arch = "x86_64";
    libc = "libSystem";
    platform = {};
  };
}).hello.crossDrv

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
tzdata: Provide lib as an additional output.

We're already using tzcode inside tzdata, so let's make it available as
an output here. The reason we need it is in order to compile OpenCFLite.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
gcc-4.8: Add ObjC and ObjC++ support for Darwin.

Cross-compiling stuff against Mac OS X's CoreFoundation won't work
without ObjC support, and we don't want to compile commandline utilities
only, right?

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
xcode: Provide the commandline toolchain as well.

This toolchain contains Mach-O binaries and might not be useful in the
first place, but there are programs like dsymutil, where Apple didn't
release the source code, so we need a Mach-O loader...

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
darwin: Add new package opencflite.

This provides a port of Mac OS X's CoreFoundation and is needed if we
want to be able to run dsymutil using maloader.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
darwin: Add new package maloader.

This is the mentioned Mach-O loader that we're yoing to use to execute
Apple's proprietary binaries.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
cctools-port: Pass through wrapped XCToolchain.

At the moment, this includes only dyldinfo, dwarfdump and dsymutil, but
we'll see whether we need more of these utilities later.

Tho reason those are wrapped in cctools-port is because it is the
binutils used to cross-compile for Mac OS X.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
lua5.2/cross: Fix build for Darwin.

The ld from cctools doesn't like the -soname argument, so let's strip it
off for now until we have a binutils <-> cctools bridge.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
glew/cross: Fix build for Darwin.

The Makefile still contained calls to install with the -s (strip)
option, which we don't want because it uses the native strip utility and
we're going to crossStrip in fixupPhase later anyway.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
openssl/cross: Fix build for Darwin.

This is just a minor fix, because when using "darwin64-x86_64-cc" for
config.openssl.system, the OpenSSL build scripts try to compile with
$prefix-cc, which is not available with the gcc-cross-wrapper.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
zlib/cross: Fix build for Darwin.

Provide the correct cross ranlib, because native ranlib will fail.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
gcc-cross-wrapper: Allow to pass US X min version.

This allows to pass a new attribute osxMinVersion to crossSystem, which
specifies the minimum Mac OS X version you want to be compatible to.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
openssl: Use Darwin patch for cross-builds too.

Might be better to have something like stdenv.isDarwinTarget, which can
be used to test for native Darwin _and_ cross-built Darwin as a target.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
audiofile: Use alsaLib for native Linux only.

Using ALSA for non-Linux systems really doesn't make much sense, so
using buildNativeInputs to ensure it won't be used for cross-builds.

Of course, if you're cross-building to Linux, the dependency won't be
used, but right now we don't have a good way to easily check whether the
cross target is Linux.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
libpng12/cross: Don't add zlib for Darwin builds.

Cross builds for Darwin already include the CoreFoundation and the
libraries from XCode, so zlib already exists on that platform.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
SDL: Refactor package and fix Darwin cross-builds.

First of all, this needs two upstream patches for supporting OS X 10.9,
also the cross-gcc doesn't accept -fpascal-strings, so drop the flag.

And except putting all configure flags into a multiline string, we're
now using a list, which is easier when it comes to handling optional
components.

As X isn't used on recent Mac OS X versions and Windows, I'm temporarily
using --without-x for cross-builds until we have a better way to check
for those things.

Also, don't add audiofile to buildInputs if we're cross-compiling for
MinGW.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
cmake: Add patch for fixing Darwin cross-builds.

This is an upstream patch and will eventually get into the next release.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>