/usr/lib/gcc/x86_64-linux-gnu/4.4.3/../../../../lib/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: ld returned 1 exit status

#!/bin/bash

# Script to modify the source to build rpcminer with CUDA support

echo "Make sure to have installed the CUDA drivers and toolkit";
echo "You can go to https://developer.nvidia.com/cuda-downloads";
echo "and https://help.ubuntu.com/community/Cuda";
sleep 3;

# 0.  Prepare the environment
Unpack the zip file with the source and go into the folder
unzip -q -d rpcminer `ls bitcoin-remote-rpc-*-src.zip` && cd rpcminer

# 1.  Open up the CMakeLists.txt.  There's a group of seven options
# (lines 5-11 in my version of the file for me).  I set "Enable CUDA
# miner" and "Build RPC miner" to ON and everythign else to OFF.
sed -i 's-\(OPTION(BITCOIN_\(ENABLE\|BUILD\)_\(OPENCL\|REMOTE\|GUI\|DAEMON\).*\)ON)-\1OFF)-g;' CMakeLists.txt;

# 2. Ran cmake → go to step 4

# 3.  Cleaned up some compile errors:
# 3A.  Added "#include <limits.h>"
# and "using namespace boost;" to serialize.h after the rest of the
# #includes
# 3A-a. Find last line with #include (after the boost library;
# there is another include near line 1112)
last_line_include_boost=`sed -n '/\#include.*boost/=' ./src/serialize.h | tail -n 1`;
# 3A-b. Add both "#include <limits.h>" and "using namespace boost;"
sed -i $last_line_include_boost's-^\(.*\)$-\1\n\#include <limits.h>\nusing namespace boost\;-g' ./src/serialize.h;
# 3C.  Modified bitcoinminercuda.cu to "#define _BITCOIN_MINER_CUDA_"
# right above the #ifdef that checks for it.
# 3C-a. For every file named "bitcoinminercuda.cu", check if it does
# not have "#define _BITCOIN_MINER_CUDA_". If that is the case, find
# the line with "#ifdef _BITCOIN_MINER_CUDA_", and put
# "#define# _BITCOIN_MINER_CUDA_" before it
for i in `find ./ -iname 'bitcoinminercuda.cu'`; do
   if [[ -z `grep '#define _BITCOIN_MINER_CUDA_' "$i"` ]]; then
      sed -i '/\#ifdef _BITCOIN_MINER_CUDA_/{x;s-.*-\#define _BITCOIN_MINER_CUDA_-;p;x}' "$i";
   fi;
done;

#4.  Ran make → Ran cmake and make
cmake ./ && make

#5.  Build the appropriate ".cubin" file
fad
#5A. Ask the user to input the correct version of the compute
#capabilities for their GPU
# http://wiki.blender.org/index.php/Dev:2.6/Source/Render/Cycles/Building
# http://ondoc.logand.com/d/365/html
# https://en.wikipedia.org/wiki/CUDA
# http://docs.nvidia.com/cuda/cuda-c-programming-guide/
#5A-a. Print message with the link to find the right information
echo "Visit the website https://developer.nvidia.com/cuda-gpus";
echo "and look for the Compute Capability corresponding to the model";
echo "of your GPU. Then input the number and press enter";
#5A-b. Read value from standard input
read GPU_CompCap;
#5A-c. Delete the period in the version
GPU_CompCap=`echo "$GPU_CompCap" | tr -d '.'`;
#5A-d. Run nvcc to compile the cubin file
nvcc ./src/cuda/bitcoinminercuda.cu -gencode arch=compute_"$GPU_CompCap",\"code=sm_$GPU_CompCap,compute_$GPU_CompCap\" --keep

Device 0: "NVS 3100M"
  CUDA Driver Version / Runtime Version          5.0 / 5.0
  CUDA Capability Major/Minor version number:    1.2
  Total amount of global memory:                 511 MBytes (536084480 bytes)
  ( 2) Multiprocessors x (  8) CUDA Cores/MP:    16 CUDA Cores
  GPU Clock rate:                                1468 MHz (1.47 GHz)
  Memory Clock rate:                             790 Mhz
  Memory Bus Width:                              64-bit
  Max Texture Dimension Size (x,y,z)             1D=(8192), 2D=(65536,32768), 3D=(2048,2048,2048)
  Max Layered Texture Size (dim) x layers        1D=(8192) x 512, 2D=(8192,8192) x 512
  Total amount of constant memory:               65536 bytes
  Total amount of shared memory per block:       16384 bytes
  Total number of registers available per block: 16384
  Warp size:                                     32
  Maximum number of threads per multiprocessor:  1024
  Maximum number of threads per block:           512
  Maximum sizes of each dimension of a block:    512 x 512 x 64
  Maximum sizes of each dimension of a grid:     65535 x 65535 x 1
  Maximum memory pitch:                          2147483647 bytes
  Texture alignment:                             256 bytes
  Concurrent copy and kernel execution:          Yes with 1 copy engine(s)
  Run time limit on kernels:                     Yes
  Integrated GPU sharing Host Memory:            No
  Support host page-locked memory mapping:       Yes
  Alignment requirement for Surfaces:            Yes
  Device has ECC support:                        Disabled
  Device supports Unified Addressing (UVA):      No
  Device PCI Bus ID / PCI location ID:           1 / 0
  Compute Mode:
     < Default (multiple host threads can use ::cudaSetDevice() with device simultaneously) >

deviceQuery, CUDA Driver = CUDART, CUDA Driver Version = 5.0, CUDA Runtime Version = 5.0, NumDevs = 1, Device0 = NVS 3100M