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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). NOTE: Running intensities above 9 with current hardware is likely to only diminish return performance even if the hash rate might appear better. A good starting baseline intensity to try on dedicated miners is 8. Higher values are there to cope with future improvements in hardware.