… since dmd uses the host C libs to determine the properties of type real. This change breaks ldc for native compiles, will have to come up with better solution.

…untime

…erence. This will match with C calling convention.

Turns all TLS vars into plain old globals.  Useful if TLS is not
supported by the target OS.

Add implementation similar to dmd -vtls to print all variables going
into TLS.

This brings together the iOS changes with the final release-0.13.0 with
dmd 2.064.

USE_REAL64 must be defined to make real types be treated as double, even
if the native host has a higher precision long double.  The makes commit
ed74a7c opt-in and not on by default.

Set versions ARM_SoftFP & D_HardFloat instead of ARM_SoftFloat &
D_SoftFloat for option -mfloat-abi=softfp (function calls use soft float
ABI but using hardware floating point instruction).

IPhoneOS and OSX are both set when triple OS is ios, as in
thumb-apple-ios.  This works like the C macros TARGET_OS_IPHONE
TARGET_OS_MAC where both are set because iPhone OS is considered a
variant of Mac OS X.

Initial version of IOSTargetABI for IPhoneOS on ARM.  It still has more
work to go.  Main difference is passing structs as values without byval
attribute.  This works around an LLVM problem with "top-down list latency
scheduler" pass that gets stores and loads out of order.

Was always defaulting thumb to soft, now uses same rules for arm.  The
end result is that thumbv7-apple-ios now defaults to softfp correctly.

Allow ldc to be a submodule.  This uses changes from
https://github.com/rpavlik/cmake-modules.

Conflicts:
	dmd2/mars.h
	gen/tocall.cpp
	runtime/druntime
	runtime/phobos

Pulling ios changes into ldc-v0.15.2.-beta1.  This version does not work
due to a change in ABI for variadics.

Conflicts:
	gen/tocall.cpp
	runtime/druntime
	runtime/phobos

The LDC ABI functions with 0.15.2 changed variadic calls so that
fastcc (llvm::CallingConv::Fast) no longer compiles.  Now using
ccc (llvm::CallingConv::C).

There is an LLVM optimizer bug that generates incorrect code for
functions like std.math.expi when using ccc.  It turns out that the bug
does not happen after upgrading from LLVM 3.5.1 to LLVM 3.6.  This means
that after this commit, use LLVM 3.6 or better.

The LDC ABI functions with 0.15.2 changed variadic calls so that
fastcc (llvm::CallingConv::Fast) no longer compiles.  Now using
ccc (llvm::CallingConv::C).

There is an LLVM optimizer bug that generates incorrect code for
functions like std.math.expi when using ccc.  It turns out that the bug
does not happen after upgrading from LLVM 3.5.1 to LLVM 3.6.  This means
that after this commit, use LLVM 3.6 or better.

Conflicts:
	runtime/druntime
	runtime/phobos

Gather source from new phobos subdirs std/algorithm, range, regex, and
others.

Conflicts:
	runtime/phobos

Conflicts:
	runtime/druntime
	runtime/phobos