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 an installed one may conflict) 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) ./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" LDFLAGS="-L ./configure make Note that you need to use /x86_64 for 64bit and /x86 for 32bit builds 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" LDFLAGS="-L" ./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=21275.0 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