ruby-accel / mkmf-cu

A gem to build Ruby extensions written in C/C++ with NVIDIA CUDA.

About mkmf-cu

mkmf-cu is a gem to build Ruby extensions written in C/C++ with NVIDIA CUDA. It consists of a simple wrapper command for nvcc and a monkey patch for mkmf.

How to use it.

Instead of require "mkmf", just

require "mkmf-cu"

How does it work?

By requiring "mkmf-cu", compiler commands defined in mkmf will be replaced with mkmf-cu-nvcc, a command included in this gem.

When mkmf-cu-nvcc is called with arguments for gcc or clang, it convert them to ones suitable for nvcc and execute nvcc with them.

For example,

mkmf-cu-nvcc -I. -fno-common -pipe -Os -O2 -Wall -o culib.o -c culib.cu

will execute

nvcc -I. -O2 -o culib.o -c culib.cu --compiler-options -fno-common --compiler-options -Wall

Example

• https://github.com/ruby-accel/ruby-cuda-example

Notice

When the suffix of the name of a file containing CUDA code is not .cu, you must add the option "-x cu" to $CFLAGS or $CXXFLAGS in extconf.rb.

mkmf-cu's Issues

ruby.h:26:10: error: #include expects "FILENAME" or <FILENAME>

With extconf.rb like:

require 'mkmf-cu'

create_header('extconf.h')
create_makefile('culib/culib')

I get errors as:

compiling ../../../../ext/culib/culib.cu
[given command line options]: --mkmf-cu-ext=c -I. -I/home/sonots/.rbenv/versions/2.4.1/include/ruby-2.4.0/x86_64-linux -I/home/sonots/.rbenv/versions/2.4.1/include/ruby-2.4.0/ruby/backward -I/home/sonots/.rbenv/versions/2.4.1/include/ruby-2.4.0 -I../../../../ext/culib -DRUBY_EXTCONF_H="extconf.h" -I/home/sonots/.rbenv/versions/2.4.1/include -fPIC -I /home/sonots/nccl/build/include -I /home/sonots/.cudnn/active/cuda/include -o culib.o -c ../../../../ext/culib/culib.cu
nvcc -I. -I/home/sonots/.rbenv/versions/2.4.1/include/ruby-2.4.0/x86_64-linux -I/home/sonots/.rbenv/versions/2.4.1/include/ruby-2.4.0/ruby/backward -I/home/sonots/.rbenv/versions/2.4.1/include/ruby-2.4.0 -I../../../../ext/culib -I/home/sonots/.rbenv/versions/2.4.1/include -I/home/sonots/nccl/build/include -I/home/sonots/.cudnn/active/cuda/include -DRUBY_EXTCONF_H="extconf.h" -o culib.o -c ../../../../ext/culib/culib.cu --compiler-options -fPIC --compiler-bindir gcc
nvcc warning : The 'compute_20', 'sm_20', and 'sm_21' architectures are deprecated, and may be removed in a future release (Use -Wno-deprecated-gpu-targets to suppress warning).
In file included from /home/sonots/.rbenv/versions/2.4.1/include/ruby-2.4.0/ruby.h:33:0,
                 from ../../../../ext/culib/culib.cu:2:
/home/sonots/.rbenv/versions/2.4.1/include/ruby-2.4.0/ruby/ruby.h:26:10: error: #include expects "FILENAME" or <FILENAME>
 #include RUBY_EXTCONF_H
          ^
In file included from /home/sonots/.rbenv/versions/2.4.1/include/ruby-2.4.0/ruby/ruby.h:36:0,
                 from /home/sonots/.rbenv/versions/2.4.1/include/ruby-2.4.0/ruby.h:33,
                 from ../../../../ext/culib/culib.cu:2:
/home/sonots/.rbenv/versions/2.4.1/include/ruby-2.4.0/ruby/defines.h:22:10: error: #include expects "FILENAME" or <FILENAME>
 #include RUBY_EXTCONF_H
          ^
In file included from /home/sonots/.rbenv/versions/2.4.1/include/ruby-2.4.0/ruby/defines.h:143:0,
                 from /home/sonots/.rbenv/versions/2.4.1/include/ruby-2.4.0/ruby/ruby.h:36,
                 from /home/sonots/.rbenv/versions/2.4.1/include/ruby-2.4.0/ruby.h:33,
                 from ../../../../ext/culib/culib.cu:2:
/home/sonots/.rbenv/versions/2.4.1/include/ruby-2.4.0/ruby/missing.h:28:10: error: #include expects "FILENAME" or <FILENAME>
 #include RUBY_EXTCONF_H
          ^
In file included from /home/sonots/.rbenv/versions/2.4.1/include/ruby-2.4.0/ruby/ruby.h:2005:0,
                 from /home/sonots/.rbenv/versions/2.4.1/include/ruby-2.4.0/ruby.h:33,
                 from ../../../../ext/culib/culib.cu:2:
/home/sonots/.rbenv/versions/2.4.1/include/ruby-2.4.0/ruby/intern.h:26:10: error: #include expects "FILENAME" or <FILENAME>
 #include RUBY_EXTCONF_H
          ^