Module: GecodeBuild

Defined in:
ext/libgecode3/extconf.rb

Defined Under Namespace

Classes: BuildError

Constant Summary collapse

GECODE_VENDOR_DIR = 
File.expand_path("../vendor/gecode-3.7.3", __FILE__).freeze
PREFIX = 
File.expand_path("../../../lib/dep-selector-libgecode/vendored-gecode", __FILE__).freeze

Class Method Summary collapse

Class Method Details

.configure ⇒ Object 



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# File 'ext/libgecode3/extconf.rb', line 20

def self.configure
  File.join(GECODE_VENDOR_DIR, "configure")
end

.configure_cmd ⇒ Object 



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# File 'ext/libgecode3/extconf.rb', line 28

def self.configure_cmd
  args = %W[
    sh
    #{configure}
    --prefix=#{prefix}
    --disable-doc-dot
    --disable-doc-search
    --disable-doc-tagfile
    --disable-doc-chm
    --disable-doc-docset
    --disable-qt
    --disable-examples
    --disable-flatzinc
  ]
  args << "--with-host-os=windows" if windows?
  args
end

.gecode_vendor_dir ⇒ Object 



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# File 'ext/libgecode3/extconf.rb', line 16

def self.gecode_vendor_dir
  GECODE_VENDOR_DIR
end

.num_processors ⇒ Object 



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# File 'ext/libgecode3/extconf.rb', line 89

def self.num_processors
  n = case RbConfig::CONFIG['host_os']
      when /darwin/
        ((`which hwprefs` != '') ? `hwprefs thread_count` : `sysctl -n hw.ncpu`).chomp
      when /linux/
        `cat /proc/cpuinfo | grep processor | wc -l`.chomp
      when /freebsd/
        `sysctl -n hw.ncpu`.chomp
      when /mswin|mingw/
        require 'win32ole'
        wmi = WIN32OLE.connect("winmgmts://")
        # This only includes physical cores, HT's are not included.
        cpu = wmi.ExecQuery("select NumberOfCores from Win32_Processor")
        cpu.to_enum.first.NumberOfCores
      else
        4
      end
  n = n.to_i
  return 1 if n < 1
  return 4 if n > 4
  n
end

.patch_configure ⇒ Object

Depending on the version of mingw we’re using, g++ may or may not fail when given the -pthreads option. When testing with ‘gcc version 4.6.2 (GCC)` mingw, this patch is required for the build to succeed.



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# File 'ext/libgecode3/extconf.rb', line 76

def self.patch_configure
  if windows?
    original_configure = IO.read(configure)
    original_configure.gsub!('pthread', 'mthread')
    File.open(configure, "w+") { |f| f.print(original_configure) }
  end
end

.prefix ⇒ Object 



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# File 'ext/libgecode3/extconf.rb', line 24

def self.prefix
  PREFIX
end

.run ⇒ Object 



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# File 'ext/libgecode3/extconf.rb', line 122

def self.run
  Dir.chdir(gecode_vendor_dir) do
    run_build_commands or raise BuildError, "Failed to build gecode library."
  end
end

.run_build_commands ⇒ Object 



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# File 'ext/libgecode3/extconf.rb', line 112

def self.run_build_commands
  setup_env
  patch_configure
  system(*configure_cmd) &&
    system("make", "clean") &&
    system("make", "-j", (num_processors + 1).to_s) &&
    system("make", "install") &&
    system("make", "distclean")
end

.setup_env ⇒ Object 



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# File 'ext/libgecode3/extconf.rb', line 46

def self.setup_env
  if windows?
    ENV['CC'] ||= 'gcc'
    ENV['CXX'] ||= 'g++'

    # Ruby DevKit ships with BSD Tar
    ENV['PROG_TAR'] ||= 'bsdtar'

    # Optimize for size on Windows
    ENV['CFLAGS'] = "#{ENV['CFLAGS']} -Os"
    ENV['CXXFLAGS'] = "#{ENV['CXXFLAGS']} -Os"
  # Older versions of CentOS and RHEL need to use this
  elsif File.exist?('/usr/bin/gcc44')
    ENV['CC'] = 'gcc44'
    ENV['CXX'] = 'g++44'
  end

  # Configure the gecode libraries to look for other gecode libraries in the
  # installed lib dir. This isn't needed for dep-selector to correctly link
  # the libraries it uses, but if you check the libraries with `ldd`, they
  # will appear to have missing deps or to link to system installed gecode.
  # When used inside an Omnibus project, this will make the health checker
  # report an error.
  libpath = File.join(PREFIX, "lib")
  ENV['LD_RUN_PATH'] = libpath
end

.system(*args) ⇒ Object 



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# File 'ext/libgecode3/extconf.rb', line 84

def self.system(*args)
  print("-> #{args.join(' ')}\n")
  super(*args)
end

.windows? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/libgecode3/extconf.rb', line 12

def self.windows?
 !!(RUBY_PLATFORM =~ /mswin|mingw|windows/)
end