This is a multi-threaded CPU miner for Litecoin and Bitcoin,
and now xcoin, forked from poolers cpuminer which is a 
fork of Jeff Garzik's reference cpuminer.

Git tree: https://github.com/Neisklar/quarkcoin-cpuminer

Different than the Sha256 and Scrypt implementation, the QRK hashing is
pure plain C code. So for performance gains, it may be good to tune
compilation with e.g. -march for specific CPU types


License: GPLv2.  See COPYING for details.

Poolers original README:

Downloads:  https://sourceforge.net/projects/cpuminer/files/
Git tree:   https://github.com/pooler/cpuminer

Dependencies:
	libcurl			http://curl.haxx.se/libcurl/
	jansson			http://www.digip.org/jansson/
		(jansson is included in-tree)

Basic *nix build instructions:
	./autogen.sh	# only needed if building from git repo
	./nomacro.pl	# only needed if building on Mac OS X or with Clang
	./configure CFLAGS="-O3"
	make

Notes for AIX users:
	* To build a 64-bit binary, export OBJECT_MODE=64
	* GNU-style long options are not supported, but are accessible
	  via configuration file

Basic Windows build instructions, using MinGW:
	Install MinGW and the MSYS Developer Tool Kit (http://www.mingw.org/)
		* Make sure you have mstcpip.h in MinGW\include
	If using MinGW-w64, install pthreads-w64
	Install libcurl devel (http://curl.haxx.se/download.html)
		* Make sure you have libcurl.m4 in MinGW\share\aclocal
		* Make sure you have curl-config in MinGW\bin
	In the MSYS shell, run:
		./autogen.sh	# only needed if building from git repo
		LIBCURL="-lcurldll" ./configure CFLAGS="-O3"
		make

Architecture-specific notes:
	ARM:	No runtime CPU detection. The miner can take advantage
		of some instructions specific to ARMv5E and later processors,
		but the decision whether to use them is made at compile time,
		based on compiler-defined macros.
		To use NEON instructions, add "-mfpu=neon" to CFLAGS.
	x86:	The miner checks for SSE2 instructions support at runtime,
		and uses them if they are available.
	x86-64:	The miner can take advantage of AVX, AVX2 and XOP instructions,
		but only if both the CPU and the operating system support them.
		    * Linux supports AVX starting from kernel version 2.6.30.
		    * FreeBSD supports AVX starting with 9.1-RELEASE.
		    * Mac OS X added AVX support in the 10.6.8 update.
		    * Windows supports AVX starting from Windows 7 SP1 and
		      Windows Server 2008 R2 SP1.
		The configure script outputs a warning if the assembler
		doesn't support some instruction sets. In that case, the miner
		can still be built, but unavailable optimizations are left off.

Usage instructions:  Run "minerd --help" to see options.

Connecting through a proxy:  Use the --proxy option.
To use a SOCKS proxy, add a socks4:// or socks5:// prefix to the proxy host.
Protocols socks4a and socks5h, allowing remote name resolving, are also
available since libcurl 7.18.0.
If no protocol is specified, the proxy is assumed to be a HTTP proxy.
When the --proxy option is not used, the program honors the http_proxy
and all_proxy environment variables.

Also many issues and FAQs are covered in the forum thread
dedicated to this program,
	https://bitcointalk.org/index.php?topic=55038.0