Specs with native extensions passing on MRI, JRuby, and Rubinius.

Added fake_build hook back to extconf.rb

Author: jdantonio

.gitignore

@@ -23,8 +23,9 @@ tmtags
 *.sw?
 .idea
 .rbx/*
-lib/*.jar
 lib/*.bundle
+lib/*.so
+lib/*.jar
 ext/*.bundle
 ext/*.so
 ext/*.jar

.travis.yml

@@ -1,21 +1,17 @@
 language: ruby
 rvm:
-  - 2.1.0
+  - 2.1.2
   - 2.0.0
   - 1.9.3
   - ruby-head
   - jruby-19mode
   - jruby-head
   - rbx-2
 jdk:
-  - openjdk7
-  - openjdk8
-  - oraclejdk7
   - oraclejdk8
 branches:
   only:
     - master
-    - atomic-reference
 matrix:
   allow_failures:
     - rvm: ruby-head

Rakefile

@@ -18,19 +18,20 @@ task :bench do
   exec "ruby -Ilib -Iext examples/bench_atomic.rb"
 end
 
+desc 'Clean up build artifacts'
+task :clean do
+  rm_rf 'pkg/classes'
+  rm_f  'lib/*.jar'
+  rm_rf '**/*.{o,so,bundle}'
+end
+
 if defined?(JRUBY_VERSION)
   require 'ant'
 
   EXTENSION_NAME = 'concurrent_jruby'
 
   directory 'pkg/classes'
 
-  desc 'Clean up build artifacts'
-  task :clean do
-    rm_rf 'pkg/classes'
-    rm_rf "lib/#{EXTENSION_NAME}.jar"
-  end
-
   desc 'Compile the extension'
   task :compile => 'pkg/classes' do |t|
     ant.javac :srcdir => 'ext', :destdir => t.prerequisites.first,
@@ -51,17 +52,19 @@ elsif use_c_extensions?
 
   require 'rake/extensiontask'
 
-  CLEAN.include Rake::FileList['**/*.so', '**/*.bundle', '**/*.o', '**/mkmf.log', '**/Makefile']
-
   spec = Gem::Specification.load('concurrent-ruby.gemspec')
   Rake::ExtensionTask.new(EXTENSION_NAME, spec) do |ext|
     ext.ext_dir = 'ext'
     ext.name = EXTENSION_NAME
     ext.source_pattern = "**/*.{h,c,cpp}"
   end
 
+  task :return_dummy_makefile do
+    sh "git co ext/Makefile"
+  end
+
   desc 'Clean, compile, and build the extension from scratch'
-  task :compile_c => [ :clean, :compile ]
+  task :compile_c => [ :clean, :compile, :return_dummy_makefile ]
 
   task :irb => [:compile] do
     sh "irb -r ./lib/#{EXTENSION_NAME}.bundle -I #{File.join(File.dirname(__FILE__), 'lib')}"
@@ -77,5 +80,5 @@ if defined?(JRUBY_VERSION)
 elsif use_c_extensions?
   task :default => [:compile_c, :travis_spec]
 else
-  task :default => [:travis_spec]
+  task :default => [:clean, :travis_spec]
 end

ext/Makefile

@@ -0,0 +1,5 @@
+all:
+	true
+
+install:
+	true

ext/extconf.rb

@@ -1,45 +1,58 @@
+require 'fileutils'
 require_relative '../lib/extension_helper'
 
+EXTENSION_NAME = 'concurrent_cruby'
+
 if defined?(JRUBY_VERSION)
   puts 'JRuby detected. Pure Java optimizations will be used.'
 elsif ! use_c_extensions?
   puts 'C optimizations are only supported on MRI 2.0 and above.'
 else
 
-  require 'mkmf'
+  def fake_build
+    # http://yorickpeterse.com/articles/hacking-extconf-rb/
+    FileUtils.touch(File.join(Dir.pwd, EXTENSION_NAME + '.' + RbConfig::CONFIG['DLEXT']))
+    $makefile_created = true
+  end
+
+  begin
 
-  extension_name = 'concurrent_cruby'
-  dir_config(extension_name)
+    require 'mkmf'
+    dir_config(EXTENSION_NAME)
 
-  have_header "libkern/OSAtomic.h"
+    have_header "libkern/OSAtomic.h"
 
-  def compiler_is_gcc
-    if CONFIG["GCC"] && CONFIG["GCC"] != ""
-      return true
-    elsif ( # This could stand to be more generic...  but I am afraid.
-           CONFIG["CC"] =~ /\bgcc\b/
-          )
-      return true
+    def compiler_is_gcc
+      if CONFIG["GCC"] && CONFIG["GCC"] != ""
+        return true
+      elsif ( # This could stand to be more generic...  but I am afraid.
+             CONFIG["CC"] =~ /\bgcc\b/
+            )
+        return true
+      end
+      return false
     end
-    return false
-  end
 
-  if compiler_is_gcc
-    case CONFIG["arch"]
-    when /mswin32|mingw|solaris/
-      $CFLAGS += " -march=native"
-    when 'i686-linux'
-      $CFLAGS += " -march=i686"
+    if compiler_is_gcc
+      case CONFIG["arch"]
+      when /mswin32|mingw|solaris/
+        $CFLAGS += " -march=native"
+      when 'i686-linux'
+        $CFLAGS += " -march=i686"
+      end
     end
-  end
 
-  try_run(<<CODE,$CFLAGS) && ($defs << '-DHAVE_GCC_CAS')
+    try_run(<<CODE,$CFLAGS) && ($defs << '-DHAVE_GCC_CAS')
 int main() {
   int i = 1;
   __sync_bool_compare_and_swap(&i, 1, 4);
   return (i != 4);
 }
 CODE
 
-  create_makefile(extension_name)
+    create_makefile(EXTENSION_NAME)
+  rescue
+    puts 'C optimizations are not supported on this version of Ruby.'
+    fake_build
+  end
 end