• README

  • This is a multi-threaded CPU and GPU miner for bitcoin.
    
    License: GPLv2.  See COPYING for details.
    
    Dependencies:
    	libcurl			http://curl.haxx.se/libcurl/
    	jansson			http://www.digip.org/jansson/
    	(jansson is included in-tree and not necessary)
    	libncurses5-dev (or libpdcurses on WIN32)
    
    Basic *nix build instructions:
    	To build with GPU mining support:
    	Install AMD APP sdk, latest version - there is no official place to
    	install it so just keep track of where it is if you're not installing
    	the include files and library files into the system directory.
    	(Do NOT install the ati amd sdk if you are on nvidia)
    
    The easiest way to install the ATI AMD SPP sdk on linux is to actually put it
    into a system location. Then building will be simpler. Download the correct
    version for either 32 bit or 64 bit from here:
    	http://developer.amd.com/sdks/AMDAPPSDK/downloads/Pages/default.aspx
    
    This will give you a file with a name like AMD-APP-SDK-v2.4-lnx64.tgz
    
    Then:
    
    sudo su
    cd /opt
    tar xf /path/to/AMD-APP-SDK-v2.4-lnx64.tgz
    cd /
    tar xf /opt/AMD-APP-SDK-v2.4-lnx64/icd-registration.tgz
    ln -s /opt/AMD-APP-SDK-v2.4-lnx64/include/CL /usr/include
    ln -s /opt/AMD-APP-SDK-v2.4-lnx64/lib/x86_64/* /usr/lib/
    ldconfig
    
    If you are on 32 bit, x86_64 in the 2nd last line should be x86
    
    	To actually build:
    
    	./autogen.sh	# only needed if building from git repo
    	CFLAGS="-O3 -Wall -march=native" ./configure
    	or if you haven't installed the ati files in system locations:
    	CFLAGS="-O3 -Wall -march=native -I<path to AMD APP include>" LDFLAGS="-L<path to AMD APP lib/x86_64> ./configure
    	make
    	
    	If it finds the opencl files it will inform you with
    	"OpenCL: FOUND. GPU mining support enabled."
    
    Basic WIN32 build instructions (on Fedora 13; requires mingw32):
    	./autogen.sh	# only needed if building from git repo
    	rm -f mingw32-config.cache
    	MINGW32_CFLAGS="-O3 -Wall -msse2" mingw32-configure
    	make
    	./mknsis.sh
    	
    Native WIN32 build instructions (on mingw32, on windows):
    	Install AMD APP sdk, latest version
    	(Do NOT install the ati amd sdk if you are on nvidia)
    	Install mingw32
    	Install libcurl, copy libcurl.m4 into /mingw/share/aclocal
    	Run:
    	autoreconf -fvi
    	CFLAGS="-O3 -Wall -msse2 -I<path to AMD APP include>" LDFLAGS="-L<path to AMD APP lib/x86>" ./configure
    	make
    
    Usage instructions:  Run "cgminer --help" to see options.
    
    Also many issues and FAQs are covered in the forum thread
    dedicated to this program,
    	http://forum.bitcoin.org/index.php?topic=28402.0
    
    The output line shows the following:
    [(5s):204.4  (avg):203.1 Mh/s] [Q:56  A:51  R:4  HW:0  E:91%  U:2.47/m]
    
    Each column is as follows:
    A 5 second exponentially decaying average hash rate
    An all time average hash rate
    The number of requested work items
    The number of accepted shares
    The number of rejected shares
    The number of hardware erorrs
    The efficiency defined as the accepted shares / requested work
    The utility defines as the number of shares / minute
    
    The cgminer status line shows:
     TQ: 1  ST: 1  LS: 0  SS: 0  DW: 0  NB: 1  LW: 8  LO: 1  RF: 1  I: 2
    
    TQ is Total Queued work items.
    ST is STaged work items (ready to use).
    LS is Longpoll Staged work items (mandatory new work)
    SS is Stale Shares discarded (detected and not submitted so don't count as rejects)
    DW is Discarded Work items (work from block no longer valid to work on)
    NB is New Blocks detected on the network
    LW is Locally generated Work items (during slow server providing work)
    LO is Local generation Occasions (server slow to provide work)
    RF is Remote Fail occasions (server slow to accept work)
    I is current Intensity (changes in dynamic mode).