Top Level Namespace

Defined Under Namespace

Modules: Logging Classes: Array, Object, String

Constant Summary collapse

CONFIG = 
RbConfig::MAKEFILE_CONFIG
ORIG_LIBPATH = 


CXX_EXT =



%w[cc cxx cpp]


SRC_EXT =



%w[c m].concat(CXX_EXT)


INSTALL_DIRS =



[
  [dir_re('commondir'), "$(RUBYCOMMONDIR)"],
  [dir_re('sitedir'), "$(RUBYCOMMONDIR)"],
  [dir_re('vendordir'), "$(RUBYCOMMONDIR)"],
  [dir_re('rubylibdir'), "$(RUBYLIBDIR)"],
  [dir_re('archdir'), "$(RUBYARCHDIR)"],
  [dir_re('sitelibdir'), "$(RUBYLIBDIR)"],
  [dir_re('vendorlibdir'), "$(RUBYLIBDIR)"],
  [dir_re('sitearchdir'), "$(RUBYARCHDIR)"],
  [dir_re('vendorarchdir'), "$(RUBYARCHDIR)"],
  [dir_re('rubyhdrdir'), "$(RUBYHDRDIR)"],
  [dir_re('sitehdrdir'), "$(SITEHDRDIR)"],
  [dir_re('vendorhdrdir'), "$(VENDORHDRDIR)"],
  [dir_re('bindir'), "$(BINDIR)"],
]


OUTFLAG =





COUTFLAG =





CPPOUTFILE =





CONFTEST_C =



"conftest.c".freeze


STRING_OR_FAILED_FORMAT =



"%s"


FailedMessage =



<<MESSAGE
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
MESSAGE


EXPORT_PREFIX =



config_string('EXPORT_PREFIX') {|s| s.strip}


COMMON_HEADERS =



hdr.join("\n")


COMMON_LIBS =



config_string('COMMON_LIBS', &split) || []


COMPILE_RULES =



config_string('COMPILE_RULES', &split) || %w[.%s.%s:]


RULE_SUBST =



config_string('RULE_SUBST')


COMPILE_C =



config_string('COMPILE_C') || '$(CC) $(INCFLAGS) $(CPPFLAGS) $(CFLAGS) $(COUTFLAG)$@ -c $<'


COMPILE_CXX =



config_string('COMPILE_CXX') || '$(CXX) $(INCFLAGS) $(CPPFLAGS) $(CXXFLAGS) $(COUTFLAG)$@ -c $<'



config_string('TRY_LINK') ||
"$(CC) #{OUTFLAG}conftest $(INCFLAGS) $(CPPFLAGS) " \
"$(CFLAGS) $(src) $(LIBPATH) $(LDFLAGS) $(ARCH_FLAG) $(LOCAL_LIBS) $(LIBS)"



config_string('LINK_SO') ||
if CONFIG["DLEXT"] == $OBJEXT
  "ld $(DLDFLAGS) -r -o $@ $(OBJS)\n"
else
  "$(LDSHARED) #{OUTFLAG}$@ $(OBJS) " \
  "$(LIBPATH) $(DLDFLAGS) $(LOCAL_LIBS) $(LIBS)"
end


LIBPATHFLAG =



config_string('LIBPATHFLAG') || ' -L"%s"'


RPATHFLAG =



config_string('RPATHFLAG') || ''


LIBARG =



config_string('LIBARG') || '-l%s'


MAIN_DOES_NOTHING =



config_string('MAIN_DOES_NOTHING') || 'int main() {return 0;}'


UNIVERSAL_INTS =



config_string('UNIVERSAL_INTS') {|s| Shellwords.shellwords(s)} ||
%w[int short long long\ long]


CLEANINGS =



"
clean-rb-default::
clean-rb::
clean-so::
clean: clean-so clean-rb-default clean-rb
\t\t@-$(RM) $(CLEANLIBS#{sep}) $(CLEANOBJS#{sep}) $(CLEANFILES#{sep})

distclean-rb-default::
distclean-rb::
distclean-so::
distclean: clean distclean-so distclean-rb-default distclean-rb
\t\t@-$(RM) Makefile $(RUBY_EXTCONF_H) conftest.* mkmf.log
\t\t@-$(RM) core ruby$(EXEEXT) *~ $(DISTCLEANFILES#{sep})
\t\t@-$(RMDIRS) $(DISTCLEANDIRS#{sep})

realclean: distclean
"





Instance Method Summary
collapse






Instance Method Details





#all_headers_files_and_directories_with_subdirectories_for(directory) ⇒ Object










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# File 'lib/mkmfmf.rb', line 1626

def all_headers_files_and_directories_with_subdirectories_for( directory )

  headers     = Dir.glob( directory + '/**/*.h' )
  files = Array.new
  SRC_EXT.each do |this_ext|
    files.concat( Dir.glob( directory + '/**/*.' + this_ext ) )
  end

  include_directories = headers.collect { |file| File.dirname( file ) }.uniq
  file_directories    = files.collect { |file| File.dirname( file ) }.uniq

  [ headers, files, include_directories ].each do |this_pathset|
    this_pathset.collect { |path| File.expand_path( path ) }
  end
  
  return headers, files, file_directories, include_directories
  
end












#append_library(libs, lib) ⇒ Object







:no-doc:















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# File 'lib/mkmfmf.rb', line 672

def append_library(libs, lib) # :no-doc:
  format(LIBARG, lib) + " " + libs
end












#arg_config(config, default = nil, &block) ⇒ Object







:stopdoc:















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# File 'lib/mkmfmf.rb', line 1206

def arg_config(config, default=nil, &block)
  $arg_config << [config, default]
  defaults = []
  if default
    defaults << default
  elsif !block
    defaults << nil
  end
  $configure_args.fetch(config.tr('_', '-'), *defaults, &block)
end












#cc_command(opt = "") ⇒ Object










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# File 'lib/mkmfmf.rb', line 396

def cc_command(opt="")
  conf = RbConfig::CONFIG.merge('hdrdir' => $hdrdir.quote, 'srcdir' => $srcdir.quote,
                                'arch_hdrdir' => "#$arch_hdrdir",
                                'top_srcdir' => $top_srcdir.quote)
  RbConfig::expand("$(CC) #$INCFLAGS #$CPPFLAGS #$CFLAGS #$ARCH_FLAG #{opt} -c #{CONFTEST_C}",
		   conf)
end












#check_signedness(type, headers = nil) ⇒ Object







Returns the signedness of the given type. You may optionally specify additional headers to search in for the type.


If the type is found and is a numeric type, a macro is passed as a preprocessor constant to the compiler using the type name, in uppercase, prepended with ‘SIGNEDNESS_OF_’, followed by the type name, followed by ‘=X’ where ‘X’ is positive integer if the type is unsigned, or negative integer if the type is signed.


For example, if size_t is defined as unsigned, then check_signedness(‘size_t’) would returned 1 and the SIGNEDNESS_OF_SIZE_T=1 preprocessor macro would be passed to the compiler, and SIGNEDNESS_OF_INT=-1 if check_signedness(‘int’) is done.















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# File 'lib/mkmfmf.rb', line 1046

def check_signedness(type, headers = nil)
  signed = nil
  checking_for("signedness of #{type}", STRING_OR_FAILED_FORMAT) do
    if try_static_assert("(#{type})-1 < 0")
      signed = -1
    elsif try_static_assert("(#{type})-1 > 0")
      signed = +1
    else
      next nil
    end
    $defs.push("-DSIGNEDNESS_OF_%s=%+d" % [type.tr_cpp, signed])
    signed < 0 ? "signed" : "unsigned"
  end
  signed
end












#check_sizeof(type, headers = nil, opts = "", &b) ⇒ Object







Returns the size of the given type. You may optionally specify additional headers to search in for the type.


If found, a macro is passed as a preprocessor constant to the compiler using the type name, in uppercase, prepended with ‘SIZEOF_’, followed by the type name, followed by ‘=X’ where ‘X’ is the actual size.


For example, if check_sizeof(‘mystruct’) returned 12, then the SIZEOF_MYSTRUCT=12 preprocessor macro would be passed to the compiler.















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# File 'lib/mkmfmf.rb', line 1008

def check_sizeof(type, headers = nil, opts = "", &b)
  typename, member = type.split('.', 2)
  prelude = cpp_include(headers).split(/$/)
  prelude << "typedef #{typename} rbcv_typedef_;\n"
  prelude << "static rbcv_typedef_ *rbcv_ptr_;\n"
  prelude = [prelude]
  expr = "sizeof((*rbcv_ptr_)#{"." << member if member})"
  fmt = STRING_OR_FAILED_FORMAT
  checking_for checking_message("size of #{type}", headers), fmt do
    if UNIVERSAL_INTS.include?(type)
      type
    elsif size = UNIVERSAL_INTS.find {|t|
        try_static_assert("#{expr} == sizeof(#{t})", prelude, opts, &b)
      }
      $defs.push(format("-DSIZEOF_%s=SIZEOF_%s", type.tr_cpp, size.tr_cpp))
      size
    elsif size = try_constant(expr, prelude, opts, &b)
      $defs.push(format("-DSIZEOF_%s=%s", type.tr_cpp, size))
      size
    end
  end
end












#checking_for(m, fmt = nil) ⇒ Object







This emits a string to stdout that allows users to see the results of the various have* and find* methods as they are tested.


Internal use only.















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# File 'lib/mkmfmf.rb', line 688

def checking_for(m, fmt = nil)
  f = caller[0][/in `([^<].*)'$/, 1] and f << ": " #` for vim #'
  m = "checking #{/\Acheck/ =~ f ? '' : 'for '}#{m}... "
  message "%s", m
  a = r = nil
  Logging::postpone do
    r = yield
    a = (fmt ? fmt % r : r ? "yes" : "no") << "\n"
    "#{f}#{m}-------------------- #{a}\n"
  end
  message(a)
  Logging::message "--------------------\n\n"
  r
end












#checking_message(target, place = nil, opt = nil) ⇒ Object










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# File 'lib/mkmfmf.rb', line 703

def checking_message(target, place = nil, opt = nil)
  [["in", place], ["with", opt]].inject("#{target}") do |msg, (pre, noun)|
    if noun
      [[:to_str], [:join, ","], [:to_s]].each do |meth, *args|
        if noun.respond_to?(meth)
          break noun = noun.send(meth, *args)
        end
      end
      msg << " #{pre} #{noun}" unless noun.empty?
    end
    msg
  end
end












#config_string(key, config = CONFIG) ⇒ Object







:stopdoc:















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# File 'lib/mkmfmf.rb', line 75

def config_string(key, config = CONFIG)
  s = config[key] and !s.empty? and block_given? ? yield(s) : s
end












#configuration(srcdir) ⇒ Object










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# File 'lib/mkmfmf.rb', line 1443

def configuration(srcdir)
  mk = []
  vpath = $VPATH.dup
  if !CROSS_COMPILING
    case CONFIG['build_os']
    when 'cygwin'
      if CONFIG['target_os'] != 'cygwin'
        vpath = vpath.map {|p| p.sub(/.*/, '$(shell cygpath -u \&)')}
      end
    end
  end
  CONFIG["hdrdir"] ||= $hdrdir
  mk << %{
SHELL = /bin/sh

#### Start of system configuration section. ####
#{"top_srcdir = " + $top_srcdir.sub(%r"\A#{Regexp.quote($topdir)}/", "$(topdir)/") if $extmk}
srcdir = #{srcdir.gsub(/\$\((srcdir)\)|\$\{(srcdir)\}/) {mkintpath(CONFIG[$1||$2])}.quote}
topdir = #{mkintpath($extmk ? CONFIG["topdir"] : $topdir).quote}
hdrdir = #{mkintpath(CONFIG["hdrdir"]).quote}
arch_hdrdir = #{$arch_hdrdir}
VPATH = #{vpath.join(CONFIG['PATH_SEPARATOR'])}:#{$file_directories.collect{ |directory| File.expand_path( directory )}.join(':')}
}
  if $extmk
    mk << "RUBYLIB = -\nRUBYOPT = -r$(top_srcdir)/ext/purelib.rb\n"
  end
  if destdir = CONFIG["prefix"][$dest_prefix_pattern, 1]
    mk << "\nDESTDIR = #{destdir}\n"
  end
  CONFIG.each do |key, var|
    next unless /prefix$/ =~ key
    mk << "#{key} = #{with_destdir(var)}\n"
  end
  CONFIG.each do |key, var|
    next if /^abs_/ =~ key
    next if /^(?:src|top|hdr)dir$/ =~ key
    next unless /dir$/ =~ key
    mk << "#{key} = #{with_destdir(var)}\n"
  end
  if !$extmk and !$configure_args.has_key?('--ruby') and
      sep = config_string('BUILD_FILE_SEPARATOR')
    sep = ":/=#{sep}"
  else
    sep = ""
  end
  possible_command = (proc {|s| s if /top_srcdir/ !~ s} unless $extmk)
  extconf_h = $extconf_h ? "-DRUBY_EXTCONF_H=\\\"$(RUBY_EXTCONF_H)\\\" " : $defs.join(" ") << " "
  mk << %{
CC = #{CONFIG['CC']}
CXX = #{CONFIG['CXX']}
LIBRUBY = #{CONFIG['LIBRUBY']}
LIBRUBY_A = #{CONFIG['LIBRUBY_A']}
LIBRUBYARG_SHARED = #$LIBRUBYARG_SHARED
LIBRUBYARG_STATIC = #$LIBRUBYARG_STATIC
OUTFLAG = #{OUTFLAG}
COUTFLAG = #{COUTFLAG}

RUBY_EXTCONF_H = #{$extconf_h}
cflags   = #{CONFIG['cflags']}
optflags = #{CONFIG['optflags']}
debugflags = #{CONFIG['debugflags']}
warnflags = #{CONFIG['warnflags']}
CFLAGS   = #{$static ? '' : CONFIG['CCDLFLAGS']} #$CFLAGS #$ARCH_FLAG
INCFLAGS = -I. #$INCFLAGS#{$include_directories.collect{ |directory| ' -I' + directory}.join(' ')}
DEFS     = #{CONFIG['DEFS']}
CPPFLAGS = #{extconf_h}#{$CPPFLAGS}
CXXFLAGS = $(CFLAGS) #{CONFIG['CXXFLAGS']}
ldflags  = #{$LDFLAGS}
dldflags = #{$DLDFLAGS}
ARCH_FLAG = #{$ARCH_FLAG}
DLDFLAGS = $(ldflags) $(dldflags)
LDSHARED = #{CONFIG['LDSHARED']}
LDSHAREDXX = #{config_string('LDSHAREDXX') || '$(LDSHARED)'}
AR = #{CONFIG['AR']}
EXEEXT = #{CONFIG['EXEEXT']}

RUBY_BASE_NAME = #{CONFIG['RUBY_BASE_NAME']}
RUBY_INSTALL_NAME = #{CONFIG['RUBY_INSTALL_NAME']}
RUBY_SO_NAME = #{CONFIG['RUBY_SO_NAME']}
arch = #{CONFIG['arch']}
sitearch = #{CONFIG['sitearch']}
ruby_version = #{RbConfig::CONFIG['ruby_version']}
ruby = #{$ruby}
RUBY = $(ruby#{sep})
RM = #{config_string('RM', &possible_command) || '$(RUBY) -run -e rm -- -f'}
RM_RF = #{'$(RUBY) -run -e rm -- -rf'}
RMDIRS = #{config_string('RMDIRS', &possible_command) || '$(RUBY) -run -e rmdir -- -p'}
MAKEDIRS = #{config_string('MAKEDIRS', &possible_command) || '@$(RUBY) -run -e mkdir -- -p'}
INSTALL = #{config_string('INSTALL', &possible_command) || '@$(RUBY) -run -e install -- -vp'}
INSTALL_PROG = #{config_string('INSTALL_PROG') || '$(INSTALL) -m 0755'}
INSTALL_DATA = #{config_string('INSTALL_DATA') || '$(INSTALL) -m 0644'}
COPY = #{config_string('CP', &possible_command) || '@$(RUBY) -run -e cp -- -v'}

#### End of system configuration section. ####

preload = #{defined?($preload) && $preload ? $preload.join(' ') : ''}
}
  if $nmake == ?b
    mk.each do |x|
      x.gsub!(/^(MAKEDIRS|INSTALL_(?:PROG|DATA))+\s*=.*\n/) do
        "!ifndef " + $1 + "\n" +
        $& +
	"!endif\n"
      end
    end
  end
  mk
end












#cpp_command(outfile, opt = "") ⇒ Object










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# File 'lib/mkmfmf.rb', line 404

def cpp_command(outfile, opt="")
  conf = RbConfig::CONFIG.merge('hdrdir' => $hdrdir.quote, 'srcdir' => $srcdir.quote,
                                'arch_hdrdir' => "#$arch_hdrdir",
                                'top_srcdir' => $top_srcdir.quote)
  RbConfig::expand("$(CPP) #$INCFLAGS #$CPPFLAGS #$CFLAGS #{opt} #{CONFTEST_C} #{outfile}",
		   conf)
end












#cpp_include(header) ⇒ Object










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# File 'lib/mkmfmf.rb', line 462

def cpp_include(header)
  if header
    header = [header] unless header.kind_of? Array
    header.map {|h| String === h ? "#include <#{h}>\n" : h}.join
  else
    ""
  end
end












#create_header(header = "extconf.h") ⇒ Object







Generates a header file consisting of the various macro definitions generated by other methods such as have_func and have_header. These are then wrapped in a custom #ifndef based on the header file name, which defaults to ‘extconf.h’.


For example:


# extconf.rb
require 'mkmf'
have_func('realpath')
have_header('sys/utime.h')
create_header
create_makefile('foo')



The above script would generate the following extconf.h file:


#ifndef EXTCONF_H
#define EXTCONF_H
#define HAVE_REALPATH 1
#define HAVE_SYS_UTIME_H 1
#endif



Given that the create_header method generates a file based on definitions set earlier in your extconf.rb file, you will probably want to make this one of the last methods you call in your script.















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# File 'lib/mkmfmf.rb', line 1302

def create_header(header = "extconf.h")
  message "creating %s\n", header
  sym = header.tr_cpp
  hdr = ["#ifndef #{sym}\n#define #{sym}\n"]
  for line in $defs
    case line
    when /^-D([^=]+)(?:=(.*))?/
      hdr << "#define #$1 #{$2 ? Shellwords.shellwords($2)[0].gsub(/(?=\t+)/, "\\\n") : 1}\n"
    when /^-U(.*)/
      hdr << "#undef #$1\n"
    end
  end
  hdr << "#endif\n"
  hdr = hdr.join
  unless (IO.read(header) == hdr rescue false)
    open(header, "wb") do |hfile|
      hfile.write(hdr)
    end
  end
  $extconf_h = header
end












#create_makefile(target, srcprefix = nil) ⇒ Object







Generates the Makefile for your extension, passing along any options and preprocessor constants that you may have generated through other methods.


The target name should correspond the name of the global function name defined within your C extension, minus the ‘Init_’. For example, if your C extension is defined as ‘Init_foo’, then your target would simply be ‘foo’.


If any ‘/’ characters are present in the target name, only the last name is interpreted as the target name, and the rest are considered toplevel directory names, and the generated Makefile will be altered accordingly to follow that directory structure.


For example, if you pass ‘test/foo’ as a target name, your extension will be installed under the ‘test’ directory. This means that in order to load the file within a Ruby program later, that directory structure will have to be followed, e.g. “require ‘test/foo’”.


The srcprefix should be used when your source files are not in the same directory as your build script. This will not only eliminate the need for you to manually copy the source files into the same directory as your build script, but it also sets the proper target_prefix in the generated Makefile.


Setting the target_prefix will, in turn, install the generated binary in a directory under your RbConfig::CONFIG that mimics your local filesystem when you run ‘make install’.


For example, given the following file tree:


ext/
   extconf.rb
   test/
      foo.c



And given the following code:


create_makefile('test/foo', 'test')



That will set the target_prefix in the generated Makefile to ‘test’. That, in turn, will create the following file tree when installed via the ‘make install’ command:


/path/to/ruby/sitearchdir/test/foo.so



It is recommended that you use this approach to generate your makefiles, instead of copying files around manually, because some third party libraries may depend on the target_prefix being set properly.


The srcprefix argument can be used to override the default source directory, i.e. the current directory . It is included as part of the VPATH and added to the list of INCFLAGS.















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# File 'lib/mkmfmf.rb', line 1697

def create_makefile(target, srcprefix = nil)
  $target = target
  libpath = $DEFLIBPATH|$LIBPATH
  message "creating Makefile\n"
  rm_f "conftest*"
  if CONFIG["DLEXT"] == $OBJEXT
    for lib in libs = $libs.split
      lib.sub!(/-l(.*)/, %%"lib\\1.#{$LIBEXT}"%)
    end
    $defs.push(format("-DEXTLIB='%s'", libs.join(",")))
  end

  if target.include?('/')
    target_prefix, target = File.split(target)
    target_prefix[0,0] = '/'
  else
    target_prefix = ""
  end

  srcprefix ||= "$(srcdir)/#{srcprefix}".chomp('/')
  RbConfig.expand(srcdir = srcprefix.dup)

  ext = ".#{$OBJEXT}"
  if not $objs
    # get sources - we want anything with our SRC_EXT in ext/target or any subdirectory
    
    headers, files, $file_directories, $include_directories = all_headers_files_and_directories_with_subdirectories_for( srcdir )
    srcs  = $srcs || files
    
#    srcs = $srcs || Dir[File.join(srcdir, "*.{#{SRC_EXT.join(%q{,})}}")]
    
    objs = srcs.inject(Hash.new {[]}) {|h, f| h[File.dirname( f ) + '/' + File.basename(f, ".*") << ext] <<= f; h}
    $objs = objs.keys
#    unless objs.delete_if {|b, f| f.size == 1}.empty?
#      dups = objs.sort.map {|b, f|
#        "#{b[/.*\./]}{#{f.collect {|n| n[/([^.]+)\z/]}.join(',')}}"
#      }
#      abort "source files duplication - #{dups.join(", ")}"
#    end
  else
    $objs.collect! {|o| File.basename(o, ".*") << ext} unless $OBJEXT == "o"
    srcs = $srcs || $objs.collect {|o| o.chomp(ext) << ".c"}
  end
  $srcs = srcs

  target = nil if $objs.empty?

  if target and EXPORT_PREFIX
    if File.exist?(File.join(srcdir, target + '.def'))
      deffile = "$(srcdir)/$(TARGET).def"
      unless EXPORT_PREFIX.empty?
        makedef = %{-pe "$_.sub!(/^(?=\\w)/,'#{EXPORT_PREFIX}') unless 1../^EXPORTS$/i"}
      end
    else
      makedef = %{-e "puts 'EXPORTS', '#{EXPORT_PREFIX}Init_$(TARGET)'"}
    end
    if makedef
      $cleanfiles << '$(DEFFILE)'
      origdef = deffile
      deffile = "$(TARGET)-$(arch).def"
    end
  end
  origdef ||= ''

  if $extout and $INSTALLFILES
    $cleanfiles.concat($INSTALLFILES.collect {|files, dir|File.join(dir, files.sub(/\A\.\//, ''))})
    $distcleandirs.concat($INSTALLFILES.collect {|files, dir| dir})
  end

  if $extmk and not $extconf_h
    create_header
  end

  libpath = libpathflag(libpath)

  dllib = target ? "$(TARGET).#{CONFIG['DLEXT']}" : ""
  staticlib = target ? "$(TARGET).#$LIBEXT" : ""
  mfile = open("Makefile", "wb")
  conf = configuration(srcprefix)
  conf = yield(conf) if block_given?
  mfile.puts(conf)
  mfile.print "
libpath = #{($DEFLIBPATH|$LIBPATH).join(" ")}
LIBPATH = #{libpath}
DEFFILE = #{deffile}

CLEANFILES = #{$cleanfiles.join(' ')}
DISTCLEANFILES = #{$distcleanfiles.join(' ')}
DISTCLEANDIRS = #{$distcleandirs.join(' ')}

extout = #{$extout && $extout.quote}
extout_prefix = #{$extout_prefix}
target_prefix = #{target_prefix}
LOCAL_LIBS = #{$LOCAL_LIBS}
LIBS = #{$LIBRUBYARG} #{$libs} #{$LIBS}
SRCS = #{srcs.collect(&File.method(:basename)).join(' ')}
OBJS = #{$objs.collect(&File.method(:basename)).join(' ')}
TARGET = #{target}
DLLIB = #{dllib}
EXTSTATIC = #{$static || ""}
STATIC_LIB = #{staticlib unless $static.nil?}
#{!$extout && defined?($installed_list) ? "INSTALLED_LIST = #{$installed_list}\n" : ""}
" #"
  # TODO: fixme
  install_dirs.each {|d| mfile.print("%-14s= %s\n" % d) if /^[[:upper:]]/ =~ d[0]}
  n = ($extout ? '$(RUBYARCHDIR)/' : '') + '$(TARGET)'
  mfile.print "
TARGET_SO     = #{($extout ? '$(RUBYARCHDIR)/' : '')}$(DLLIB)
CLEANLIBS     = #{n}.#{CONFIG['DLEXT']} #{config_string('cleanlibs') {|t| t.gsub(/\$\*/) {n}}}
CLEANOBJS     = *.#{$OBJEXT} #{config_string('cleanobjs') {|t| t.gsub(/\$\*/, "$(TARGET)#{deffile ? '-$(arch)': ''}")} if target} *.bak

all:    #{$extout ? "install" : target ? "$(DLLIB)" : "Makefile"}
static: $(STATIC_LIB)#{$extout ? " install-rb" : ""}
.PHONY: all install static install-so install-rb
.PHONY: clean clean-so clean-rb
"
  mfile.print CLEANINGS
  fsep = config_string('BUILD_FILE_SEPARATOR') {|s| s unless s == "/"}
  if fsep
    sep = ":/=#{fsep}"
    fseprepl = proc {|s|
      s = s.gsub("/", fsep)
      s = s.gsub(/(\$\(\w+)(\))/) {$1+sep+$2}
      s = s.gsub(/(\$\{\w+)(\})/) {$1+sep+$2}
    }
  else
    fseprepl = proc {|s| s}
    sep = ""
  end
  dirs = []
  mfile.print "install: install-so install-rb\n\n"
  sodir = (dir = "$(RUBYARCHDIR)").dup
  mfile.print("install-so: ")
  if target
    f = "$(DLLIB)"
    dest = "#{dir}/#{f}"
    mfile.puts dir, "install-so: #{dest}"
    if $extout
      mfile.print "clean-so::\n"
      mfile.print "\t@-$(RM) #{fseprepl[dest]}\n"
      mfile.print "\t@-$(RMDIRS) #{fseprepl[dir]}\n"
    else
      mfile.print "#{dest}: #{f}\n\t@-$(MAKEDIRS) $(@D#{sep})\n"
      mfile.print "\t$(INSTALL_PROG) #{fseprepl[f]} $(@D#{sep})\n"
      if defined?($installed_list)
	mfile.print "\t@echo #{dir}/#{File.basename(f)}>>$(INSTALLED_LIST)\n"
      end
    end
  else
    mfile.puts "Makefile"
  end
  mfile.print("install-rb: pre-install-rb install-rb-default\n")
  mfile.print("install-rb-default: pre-install-rb-default\n")
  mfile.print("pre-install-rb: Makefile\n")
  mfile.print("pre-install-rb-default: Makefile\n")
  for sfx, i in [["-default", [["lib/**/*.rb", "$(RUBYLIBDIR)", "lib"]]], ["", $INSTALLFILES]]
    files = install_files(mfile, i, nil, srcprefix) or next
    for dir, *files in files
      unless dirs.include?(dir)
	dirs << dir
	mfile.print "pre-install-rb#{sfx}: #{dir}\n"
      end
      for f in files
	dest = "#{dir}/#{File.basename(f)}"
	mfile.print("install-rb#{sfx}: #{dest}\n")
	mfile.print("#{dest}: #{f}\n\t@-$(MAKEDIRS) $(@D#{sep})\n")
	mfile.print("\t$(#{$extout ? 'COPY' : 'INSTALL_DATA'}) #{f} $(@D#{sep})\n")
	if defined?($installed_list) and !$extout
	  mfile.print("\t@echo #{dest}>>$(INSTALLED_LIST)\n")
	end
        if $extout
          mfile.print("clean-rb#{sfx}::\n")
          mfile.print("\t@-$(RM) #{fseprepl[dest]}\n")
        end
      end
    end
    if $extout
      dirs.uniq!
      unless dirs.empty?
        mfile.print("clean-rb#{sfx}::\n")
        for dir in dirs.sort_by {|d| -d.count('/')}
          mfile.print("\t@-$(RMDIRS) #{fseprepl[dir]}\n")
        end
      end
    end
  end
  dirs.unshift(sodir) if target and !dirs.include?(sodir)
  dirs.each {|d| mfile.print "#{d}:\n\t$(MAKEDIRS) $@\n"}

  mfile.print <<-SITEINSTALL

site-install: site-install-so site-install-rb
site-install-so: install-so
site-install-rb: install-rb

  SITEINSTALL

  return unless target

  mfile.puts SRC_EXT.collect {|e| ".path.#{e} = $(VPATH)"} if $nmake == ?b
  mfile.print ".SUFFIXES: .#{SRC_EXT.join(' .')} .#{$OBJEXT}\n"
  mfile.print "\n"

  CXX_EXT.each do |e|
    COMPILE_RULES.each do |rule|
      mfile.printf(rule, e, $OBJEXT)
      mfile.printf("\n\t%s\n\n", COMPILE_CXX)
    end
  end
  %w[c].each do |e|
    COMPILE_RULES.each do |rule|
      mfile.printf(rule, e, $OBJEXT)
      mfile.printf("\n\t%s\n\n", COMPILE_C)
    end
  end

  mfile.print "$(RUBYARCHDIR)/" if $extout
  mfile.print "$(DLLIB): "
  mfile.print "$(DEFFILE) " if makedef
  mfile.print "$(OBJS) Makefile\n"
  mfile.print "\t@-$(RM) $(@#{sep})\n"
  mfile.print "\t@-$(MAKEDIRS) $(@D)\n" if $extout
  link_so = LINK_SO.gsub(/^/, "\t")
  if srcs.any?(&%r"\.(?:#{CXX_EXT.join('|')})\z".method(:===))
    link_so = link_so.sub(/\bLDSHARED\b/, '\&XX')
  end
  mfile.print link_so, "\n\n"
  unless $static.nil?
    mfile.print "$(STATIC_LIB): $(OBJS)\n\t@-$(RM) $(@#{sep})\n\t"
    mfile.print "$(AR) #{config_string('ARFLAGS') || 'cru '}$@ $(OBJS)"
    config_string('RANLIB') do |ranlib|
      mfile.print "\n\t@-#{ranlib} $(DLLIB) 2> /dev/null || true"
    end
  end
  mfile.print "\n\n"
  if makedef
    mfile.print "$(DEFFILE): #{origdef}\n"
    mfile.print "\t$(RUBY) #{makedef} #{origdef} > $@\n\n"
  end

  depend = File.join(srcdir, "depend")
  if File.exist?(depend)
    mfile.print("###\n", *depend_rules(File.read(depend)))
  else
    headers = %w[$(hdrdir)/ruby.h $(hdrdir)/ruby/defines.h]
    if RULE_SUBST
      headers.each {|h| h.sub!(/.*/, &RULE_SUBST.method(:%))}
    end
    headers << $config_h
    headers << '$(RUBY_EXTCONF_H)' if $extconf_h
    mfile.print "$(OBJS): ", headers.join(' '), "\n"
  end

  $makefile_created = true
ensure
  mfile.close if mfile
end












#create_tmpsrc(src) ⇒ Object










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# File 'lib/mkmfmf.rb', line 336

def create_tmpsrc(src)
  src = "#{COMMON_HEADERS}\n#{src}"
  src = yield(src) if block_given?
  src.gsub!(/[ \t]+$/, '')
  src.gsub!(/\A\n+|^\n+$/, '')
  src.sub!(/[^\n]\z/, "\\&\n")
  count = 0
  begin
    open(CONFTEST_C, "wb") do |cfile|
      cfile.print src
    end
  rescue Errno::EACCES
    if (count += 1) < 5
      sleep 0.2
      retry
    end
  end
  src
end












#depend_rules(depend) ⇒ Object










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# File 'lib/mkmfmf.rb', line 1565

def depend_rules(depend)
  suffixes = []
  depout = []
  cont = implicit = nil
  impconv = proc do
    COMPILE_RULES.each {|rule| depout << (rule % implicit[0]) << implicit[1]}
    implicit = nil
  end
  ruleconv = proc do |line|
    if implicit
      if /\A\t/ =~ line
        implicit[1] << line
        next
      else
        impconv[]
      end
    end
    if m = /\A\.(\w+)\.(\w+)(?:\s*:)/.match(line)
      suffixes << m[1] << m[2]
      implicit = [[m[1], m[2]], [m.post_match]]
      next
    elsif RULE_SUBST and /\A(?!\s*\w+\s*=)[$\w][^#]*:/ =~ line
      line.gsub!(%r"(\s)(?!\.)([^$(){}+=:\s\/\\,]+)(?=\s|\z)") {$1 + RULE_SUBST % $2}
    end
    depout << line
  end
  depend.each_line do |line|
    line.gsub!(/\.o\b/, ".#{$OBJEXT}")
    line.gsub!(/\$\((?:hdr|top)dir\)\/config.h/, $config_h)
    line.gsub!(%r"\$\(hdrdir\)/(?!ruby(?![^:;/\s]))(?=[-\w]+\.h)", '\&ruby/')
    if $nmake && /\A\s*\$\(RM|COPY\)/ =~ line
      line.gsub!(%r"[-\w\./]{2,}"){$&.tr("/", "\\")}
      line.gsub!(/(\$\((?!RM|COPY)[^:)]+)(?=\))/, '\1:/=\\')
    end
    if /(?:^|[^\\])(?:\\\\)*\\$/ =~ line
      (cont ||= []) << line
      next
    elsif cont
      line = (cont << line).join
      cont = nil
    end
    ruleconv.call(line)
  end
  if cont
    ruleconv.call(cont.join)
  elsif implicit
    impconv.call
  end
  unless suffixes.empty?
    depout.unshift(".SUFFIXES: ." + suffixes.uniq.join(" .") + "\n\n")
  end
  depout.unshift("$(OBJS): $(RUBY_EXTCONF_H)\n\n") if $extconf_h
  depout.flatten!
  depout
end












#dir_config(target, idefault = nil, ldefault = nil) ⇒ Object







Sets a target name that the user can then use to configure various ‘with’ options with on the command line by using that name. For example, if the target is set to “foo”, then the user could use the –with-foo-dir command line option.


You may pass along additional ‘include’ or ‘lib’ defaults via the idefault and ldefault parameters, respectively.


Note that dir_config only adds to the list of places to search for libraries and include files. It does not link the libraries into your application.















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# File 'lib/mkmfmf.rb', line 1335

def dir_config(target, idefault=nil, ldefault=nil)
  if dir = with_config(target + "-dir", (idefault unless ldefault))
    defaults = Array === dir ? dir : dir.split(File::PATH_SEPARATOR)
    idefault = ldefault = nil
  end

  idir = with_config(target + "-include", idefault)
  $arg_config.last[1] ||= "${#{target}-dir}/include"
  ldir = with_config(target + "-lib", ldefault)
  $arg_config.last[1] ||= "${#{target}-dir}/lib"

  idirs = idir ? Array === idir ? idir.dup : idir.split(File::PATH_SEPARATOR) : []
  if defaults
    idirs.concat(defaults.collect {|d| d + "/include"})
    idir = ([idir] + idirs).compact.join(File::PATH_SEPARATOR)
  end
  unless idirs.empty?
    idirs.collect! {|d| "-I" + d}
    idirs -= Shellwords.shellwords($CPPFLAGS)
    unless idirs.empty?
      $CPPFLAGS = (idirs.quote << $CPPFLAGS).join(" ")
    end
  end

  ldirs = ldir ? Array === ldir ? ldir.dup : ldir.split(File::PATH_SEPARATOR) : []
  if defaults
    ldirs.concat(defaults.collect {|d| d + "/lib"})
    ldir = ([ldir] + ldirs).compact.join(File::PATH_SEPARATOR)
  end
  $LIBPATH = ldirs | $LIBPATH

  [idir, ldir]
end












#dir_re(dir) ⇒ Object










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# File 'lib/mkmfmf.rb', line 79

def dir_re(dir)
  Regexp.new('\$(?:\('+dir+'\)|\{'+dir+'\})(?:\$(?:\(target_prefix\)|\{target_prefix\}))?')
end












#dummy_makefile(srcdir) ⇒ Object







:startdoc:















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# File 'lib/mkmfmf.rb', line 1553

def dummy_makefile(srcdir)
  configuration(srcdir) << <<RULES << CLEANINGS
CLEANFILES = #{$cleanfiles.join(' ')}
DISTCLEANFILES = #{$distcleanfiles.join(' ')}

all install static install-so install-rb: Makefile
.PHONY: all install static install-so install-rb
.PHONY: clean clean-so clean-rb

RULES
end












#egrep_cpp(pat, src, opt = "", &b) ⇒ Object










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# File 'lib/mkmfmf.rb', line 577

def egrep_cpp(pat, src, opt = "", &b)
  src = create_tmpsrc(src, &b)
  xpopen(cpp_command('', opt)) do |f|
    if Regexp === pat
      puts("    ruby -ne 'print if #{pat.inspect}'")
      f.grep(pat) {|l|
	puts "#{f.lineno}: #{l}"
	return true
      }
      false
    else
      puts("    egrep '#{pat}'")
      begin
	stdin = $stdin.dup
	$stdin.reopen(f)
	system("egrep", pat)
      ensure
	$stdin.reopen(stdin)
      end
    end
  end
ensure
  rm_f "conftest*"
  log_src(src)
end












#enable_config(config, default = nil) ⇒ Object







Tests for the presence of an –enable-config or –disable-config option. Returns true if the enable option is given, false if the disable option is given, and the default value otherwise.


This can be useful for adding custom definitions, such as debug information.


Example:


if enable_config("debug")
   $defs.push("-DOSSL_DEBUG") unless $defs.include? "-DOSSL_DEBUG"
end
















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# File 'lib/mkmfmf.rb', line 1264

def enable_config(config, default=nil)
  if arg_config("--enable-"+config)
    true
  elsif arg_config("--disable-"+config)
    false
  elsif block_given?
    yield(config, default)
  else
    return default
  end
end












#find_executable(bin, path = nil) ⇒ Object







Searches for the executable bin on path. The default path is your PATH environment variable. If that isn’t defined, it will resort to searching /usr/local/bin, /usr/ucb, /usr/bin and /bin.


If found, it will return the full path, including the executable name, of where it was found.


Note that this method does not actually affect the generated Makefile.















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# File 'lib/mkmfmf.rb', line 1198

def find_executable(bin, path = nil)
  checking_for checking_message(bin, path) do
    find_executable0(bin, path)
  end
end












#find_executable0(bin, path = nil) ⇒ Object







This method is used internally by the find_executable method.


Internal use only.















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# File 'lib/mkmfmf.rb', line 1163

def find_executable0(bin, path = nil)
  exts = config_string('EXECUTABLE_EXTS') {|s| s.split} || config_string('EXEEXT') {|s| [s]}
  if File.expand_path(bin) == bin
    return bin if File.executable?(bin)
    if exts
      exts.each {|ext| File.executable?(file = bin + ext) and return file}
    end
    return nil
  end
  if path ||= ENV['PATH']
    path = path.split(File::PATH_SEPARATOR)
  else
    path = %w[/usr/local/bin /usr/ucb /usr/bin /bin]
  end
  file = nil
  path.each do |dir|
    return file if File.executable?(file = File.join(dir, bin))
    if exts
      exts.each {|ext| File.executable?(ext = file + ext) and return ext}
    end
  end
  nil
end












#find_header(header, *paths) ⇒ Object







Instructs mkmf to search for the given header in any of the paths provided, and returns whether or not it was found in those paths.


If the header is found then the path it was found on is added to the list of included directories that are sent to the compiler (via the -I switch).















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# File 'lib/mkmfmf.rb', line 850

def find_header(header, *paths)
  message = checking_message(header, paths)
  header = cpp_include(header)
  checking_for message do
    if try_header(header)
      true
    else
      found = false
      paths.each do |dir|
        opt = "-I#{dir}".quote
        if try_header(header, opt)
          $INCFLAGS << " " << opt
          found = true
          break
        end
      end
      found
    end
  end
end












#find_library(lib, func, *paths, &b) ⇒ Object







Returns whether or not the entry point func can be found within the library lib in one of the paths specified, where paths is an array of strings. If func is nil , then the main() function is used as the entry point.


If lib is found, then the path it was found on is added to the list of library paths searched and linked against.















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# File 'lib/mkmfmf.rb', line 766

def find_library(lib, func, *paths, &b)
  func = "main" if !func or func.empty?
  lib = with_config(lib+'lib', lib)
  paths = paths.collect {|path| path.split(File::PATH_SEPARATOR)}.flatten
  checking_for "#{func}() in #{LIBARG%lib}" do
    libpath = $LIBPATH
    libs = append_library($libs, lib)
    begin
      until r = try_func(func, libs, &b) or paths.empty?
	$LIBPATH = libpath | [paths.shift]
      end
      if r
	$libs = libs
	libpath = nil
      end
    ensure
      $LIBPATH = libpath if libpath
    end
    r
  end
end












#find_type(type, opt, *headers, &b) ⇒ Object







Returns where the static type type is defined.


You may also pass additional flags to opt which are then passed along to the compiler.


See also have_type.















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# File 'lib/mkmfmf.rb', line 941

def find_type(type, opt, *headers, &b)
  opt ||= ""
  fmt = "not found"
  def fmt.%(x)
    x ? x.respond_to?(:join) ? x.join(",") : x : self
  end
  checking_for checking_message(type, nil, opt), fmt do
    headers.find do |h|
      try_type(type, h, opt, &b)
    end
  end
end












#have_const(const, headers = nil, opt = "", &b) ⇒ Object







Returns whether or not the constant const is defined. You may optionally pass the type of const as [const, type], like as:


have_const(%w[PTHREAD_MUTEX_INITIALIZER pthread_mutex_t], "pthread.h")



You may also pass additional headers to check against in addition to the common header files, and additional flags to opt which are then passed along to the compiler.


If found, a macro is passed as a preprocessor constant to the compiler using the type name, in uppercase, prepended with ‘HAVE_CONST_’.


For example, if have_const(‘foo’) returned true, then the HAVE_CONST_FOO preprocessor macro would be passed to the compiler.















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# File 'lib/mkmfmf.rb', line 985

def have_const(const, headers = nil, opt = "", &b)
  checking_for checking_message([*const].compact.join(' '), headers, opt) do
    try_const(const, headers, opt, &b)
  end
end












#have_devel? ⇒ Boolean













Returns:


    

  • 
(Boolean)

    • 










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# File 'lib/mkmfmf.rb', line 356

def have_devel?
  unless defined? $have_devel
    $have_devel = true
    $have_devel = try_link(MAIN_DOES_NOTHING)
  end
  $have_devel
end












#have_func(func, headers = nil, &b) ⇒ Object







Returns whether or not the function func can be found in the common header files, or within any headers that you provide. If found, a macro is passed as a preprocessor constant to the compiler using the function name, in uppercase, prepended with ‘HAVE_’.


For example, if have_func(‘foo’) returned true, then the HAVE_FOO preprocessor macro would be passed to the compiler.















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# File 'lib/mkmfmf.rb', line 796

def have_func(func, headers = nil, &b)
  checking_for checking_message("#{func}()", headers) do
    if try_func(func, $libs, headers, &b)
      $defs.push(format("-DHAVE_%s", func.tr_cpp))
      true
    else
      false
    end
  end
end












#have_header(header, preheaders = nil, &b) ⇒ Object







Returns whether or not the given header file can be found on your system. If found, a macro is passed as a preprocessor constant to the compiler using the header file name, in uppercase, prepended with ‘HAVE_’.


For example, if have_header(‘foo.h’) returned true, then the HAVE_FOO_H preprocessor macro would be passed to the compiler.















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# File 'lib/mkmfmf.rb', line 833

def have_header(header, preheaders = nil, &b)
  checking_for header do
    if try_header(cpp_include(preheaders)+cpp_include(header), &b)
      $defs.push(format("-DHAVE_%s", header.tr_cpp))
      true
    else
      false
    end
  end
end












#have_library(lib, func = nil, headers = nil, &b) ⇒ Object







Returns whether or not the given entry point func can be found within lib. If func is nil, the ‘main()’ entry point is used by default. If found, it adds the library to list of libraries to be used when linking your extension.


If headers are provided, it will include those header files as the header files it looks in when searching for func.


The real name of the library to be linked can be altered by ‘–with-FOOlib’ configuration option.















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# File 'lib/mkmfmf.rb', line 741

def have_library(lib, func = nil, headers = nil, &b)
  func = "main" if !func or func.empty?
  lib = with_config(lib+'lib', lib)
  checking_for checking_message("#{func}()", LIBARG%lib) do
    if COMMON_LIBS.include?(lib)
      true
    else
      libs = append_library($libs, lib)
      if try_func(func, libs, headers, &b)
        $libs = libs
        true
      else
        false
      end
    end
  end
end












#have_macro(macro, headers = nil, opt = "", &b) ⇒ Object







Returns whether or not macro is defined either in the common header files or within any headers you provide.


Any options you pass to opt are passed along to the compiler.















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# File 'lib/mkmfmf.rb', line 724

def have_macro(macro, headers = nil, opt = "", &b)
  checking_for checking_message(macro, headers, opt) do
    macro_defined?(macro, cpp_include(headers), opt, &b)
  end
end












#have_struct_member(type, member, headers = nil, &b) ⇒ Object







Returns whether or not the struct of type type contains member. If it does not, or the struct type can’t be found, then false is returned. You may optionally specify additional headers in which to look for the struct (in addition to the common header files).


If found, a macro is passed as a preprocessor constant to the compiler using the type name and the member name, in uppercase, prepended with ‘HAVE_’.


For example, if have_struct_member(‘struct foo’, ‘bar’) returned true, then the HAVE_STRUCT_FOO_BAR preprocessor macro would be passed to the compiler.


HAVE_ST_BAR is also defined for backward compatibility.















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# File 'lib/mkmfmf.rb', line 884

def have_struct_member(type, member, headers = nil, &b)
  checking_for checking_message("#{type}.#{member}", headers) do
    if try_compile(<<"SRC", &b)
#{cpp_include(headers)}
/*top*/
#{MAIN_DOES_NOTHING}
int s = (char *)&((#{type}*)0)->#{member} - (char *)0;
SRC
      $defs.push(format("-DHAVE_%s_%s", type.tr_cpp, member.tr_cpp))
      $defs.push(format("-DHAVE_ST_%s", member.tr_cpp)) # backward compatibility
      true
    else
      false
    end
  end
end












#have_type(type, headers = nil, opt = "", &b) ⇒ Object







Returns whether or not the static type type is defined. You may optionally pass additional headers to check against in addition to the common header files.


You may also pass additional flags to opt which are then passed along to the compiler.


If found, a macro is passed as a preprocessor constant to the compiler using the type name, in uppercase, prepended with ‘HAVE_TYPE_’.


For example, if have_type(‘foo’) returned true, then the HAVE_TYPE_FOO preprocessor macro would be passed to the compiler.















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# File 'lib/mkmfmf.rb', line 928

def have_type(type, headers = nil, opt = "", &b)
  checking_for checking_message(type, headers, opt) do
    try_type(type, headers, opt, &b)
  end
end












#have_typeof? ⇒ Boolean







Used internally by the what_type? method to check if typeof GCC extension is available.








Returns:


    

  • 
(Boolean)

    • 










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# File 'lib/mkmfmf.rb', line 1090

def have_typeof?
  return $typeof if defined?($typeof)
  $typeof = %w[__typeof__ typeof].find do |t|
    try_compile(<<SRC)
int rbcv_foo;
#{t}(rbcv_foo) rbcv_bar;
SRC
  end
end












#have_var(var, headers = nil, &b) ⇒ Object







Returns whether or not the variable var can be found in the common header files, or within any headers that you provide. If found, a macro is passed as a preprocessor constant to the compiler using the variable name, in uppercase, prepended with ‘HAVE_’.


For example, if have_var(‘foo’) returned true, then the HAVE_FOO preprocessor macro would be passed to the compiler.















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# File 'lib/mkmfmf.rb', line 815

def have_var(var, headers = nil, &b)
  checking_for checking_message(var, headers) do
    if try_var(var, headers, &b)
      $defs.push(format("-DHAVE_%s", var.tr_cpp))
      true
    else
      false
    end
  end
end












#init_mkmf(config = CONFIG) ⇒ Object







:stopdoc:















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# File 'lib/mkmfmf.rb', line 1957

def init_mkmf(config = CONFIG)
  $makefile_created = false
  $arg_config = []
  $enable_shared = config['ENABLE_SHARED'] == 'yes'
  $defs = []
  $extconf_h = nil
  $CFLAGS = with_config("cflags", arg_config("CFLAGS", config["CFLAGS"])).dup
  $ARCH_FLAG = with_config("arch_flag", arg_config("ARCH_FLAG", config["ARCH_FLAG"])).dup
  $CPPFLAGS = with_config("cppflags", arg_config("CPPFLAGS", config["CPPFLAGS"])).dup
  $LDFLAGS = with_config("ldflags", arg_config("LDFLAGS", config["LDFLAGS"])).dup
  $INCFLAGS = "-I$(arch_hdrdir)"
  $INCFLAGS << " -I$(hdrdir)/ruby/backward" unless $extmk
  $INCFLAGS << " -I$(hdrdir) -I$(srcdir)"
  $DLDFLAGS = with_config("dldflags", arg_config("DLDFLAGS", config["DLDFLAGS"])).dup
  $LIBEXT = config['LIBEXT'].dup
  $OBJEXT = config["OBJEXT"].dup
  $LIBS = "#{config['LIBS']} #{config['DLDLIBS']}"
  $LIBRUBYARG = ""
  $LIBRUBYARG_STATIC = config['LIBRUBYARG_STATIC']
  $LIBRUBYARG_SHARED = config['LIBRUBYARG_SHARED']
  $DEFLIBPATH = [$extmk ? "$(topdir)" : "$(libdir)"]
  $DEFLIBPATH.unshift(".")
  $LIBPATH = []
  $INSTALLFILES = []
  $NONINSTALLFILES = [/~\z/, /\A#.*#\z/, /\A\.#/, /\.bak\z/i, /\.orig\z/, /\.rej\z/, /\.l[ao]\z/, /\.o\z/]
  $VPATH = %w[$(srcdir) $(arch_hdrdir)/ruby $(hdrdir)/ruby]

  $objs = nil
  $srcs = nil
  $libs = ""
  if $enable_shared or RbConfig.expand(config["LIBRUBY"].dup) != RbConfig.expand(config["LIBRUBY_A"].dup)
    $LIBRUBYARG = config['LIBRUBYARG']
  end

  $LOCAL_LIBS = ""

  $cleanfiles = config_string('CLEANFILES') {|s| Shellwords.shellwords(s)} || []
  $cleanfiles << "mkmf.log"
  $distcleanfiles = config_string('DISTCLEANFILES') {|s| Shellwords.shellwords(s)} || []
  $distcleandirs = config_string('DISTCLEANDIRS') {|s| Shellwords.shellwords(s)} || []

  $extout ||= nil
  $extout_prefix ||= nil

  $arg_config.clear
  dir_config("opt")
end












#install_dirs(target_prefix = nil) ⇒ Object










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# File 'lib/mkmfmf.rb', line 108

def install_dirs(target_prefix = nil)
  if $extout
    dirs = [
      ['BINDIR',        '$(extout)/bin'],
      ['RUBYCOMMONDIR', '$(extout)/common'],
      ['RUBYLIBDIR',    '$(RUBYCOMMONDIR)$(target_prefix)'],
      ['RUBYARCHDIR',   '$(extout)/$(arch)$(target_prefix)'],
      ['HDRDIR',        '$(extout)/include/ruby$(target_prefix)'],
      ['ARCHHDRDIR',    '$(extout)/include/$(arch)/ruby$(target_prefix)'],
      ['extout',        "#$extout"],
      ['extout_prefix', "#$extout_prefix"],
    ]
  elsif $extmk
    dirs = [
      ['BINDIR',        '$(bindir)'],
      ['RUBYCOMMONDIR', '$(rubylibdir)'],
      ['RUBYLIBDIR',    '$(rubylibdir)$(target_prefix)'],
      ['RUBYARCHDIR',   '$(archdir)$(target_prefix)'],
      ['HDRDIR',        '$(rubyhdrdir)/ruby$(target_prefix)'],
      ['ARCHHDRDIR',    '$(rubyhdrdir)/$(arch)/ruby$(target_prefix)'],
    ]
  elsif $configure_args.has_key?('--vendor')
    dirs = [
      ['BINDIR',        '$(bindir)'],
      ['RUBYCOMMONDIR', '$(vendordir)$(target_prefix)'],
      ['RUBYLIBDIR',    '$(vendorlibdir)$(target_prefix)'],
      ['RUBYARCHDIR',   '$(vendorarchdir)$(target_prefix)'],
      ['HDRDIR',        '$(rubyhdrdir)/ruby$(target_prefix)'],
      ['ARCHHDRDIR',    '$(rubyhdrdir)/$(arch)/ruby$(target_prefix)'],
    ]
  else
    dirs = [
      ['BINDIR',        '$(bindir)'],
      ['RUBYCOMMONDIR', '$(sitedir)$(target_prefix)'],
      ['RUBYLIBDIR',    '$(sitelibdir)$(target_prefix)'],
      ['RUBYARCHDIR',   '$(sitearchdir)$(target_prefix)'],
      ['HDRDIR',        '$(rubyhdrdir)/ruby$(target_prefix)'],
      ['ARCHHDRDIR',    '$(rubyhdrdir)/$(arch)/ruby$(target_prefix)'],
    ]
  end
  dirs << ['target_prefix', (target_prefix ? "/#{target_prefix}" : "")]
  dirs
end












#install_files(mfile, ifiles, map = nil, srcprefix = nil) ⇒ Object










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# File 'lib/mkmfmf.rb', line 625

def install_files(mfile, ifiles, map = nil, srcprefix = nil)
  ifiles or return
  ifiles.empty? and return
  srcprefix ||= "$(srcdir)/#{srcprefix}".chomp('/')
  RbConfig::expand(srcdir = srcprefix.dup)
  dirs = []
  path = Hash.new {|h, i| h[i] = dirs.push([i])[-1]}
  ifiles.each do |files, dir, prefix|
    dir = map_dir(dir, map)
    prefix &&= %r|\A#{Regexp.quote(prefix)}/?|
    if /\A\.\// =~ files
      # install files which are in current working directory.
      files = files[2..-1]
      len = nil
    else
      # install files which are under the $(srcdir).
      files = File.join(srcdir, files)
      len = srcdir.size
    end
    f = nil
    Dir.glob(files) do |fx|
      f = fx
      f[0..len] = "" if len
      case File.basename(f)
      when *$NONINSTALLFILES
        next
      end
      d = File.dirname(f)
      d.sub!(prefix, "") if prefix
      d = (d.empty? || d == ".") ? dir : File.join(dir, d)
      f = File.join(srcprefix, f) if len
      path[d] << f
    end
    unless len or f
      d = File.dirname(files)
      d.sub!(prefix, "") if prefix
      d = (d.empty? || d == ".") ? dir : File.join(dir, d)
      path[d] << files
    end
  end
  dirs
end












#install_rb(mfile, dest, srcdir = nil) ⇒ Object










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# File 'lib/mkmfmf.rb', line 668

def install_rb(mfile, dest, srcdir = nil)
  install_files(mfile, [["lib/**/*.rb", dest, "lib"]], nil, srcdir)
end












#libpathflag(libpath = $DEFLIBPATH|$LIBPATH) ⇒ Object










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# File 'lib/mkmfmf.rb', line 412

def libpathflag(libpath=$DEFLIBPATH|$LIBPATH)
  libpath.map{|x|
    case x
    when "$(topdir)", /\A\./
      LIBPATHFLAG
    else
      LIBPATHFLAG+RPATHFLAG
    end % x.quote
  }.join
end












#link_command(ldflags, opt = "", libpath = $DEFLIBPATH|$LIBPATH) ⇒ Object










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# File 'lib/mkmfmf.rb', line 380

def link_command(ldflags, opt="", libpath=$DEFLIBPATH|$LIBPATH)
  conf = RbConfig::CONFIG.merge('hdrdir' => $hdrdir.quote,
                                'src' => "#{CONFTEST_C}",
                                'arch_hdrdir' => "#$arch_hdrdir",
                                'top_srcdir' => $top_srcdir.quote,
                                'INCFLAGS' => "#$INCFLAGS",
                                'CPPFLAGS' => "#$CPPFLAGS",
                                'CFLAGS' => "#$CFLAGS",
                                'ARCH_FLAG' => "#$ARCH_FLAG",
                                'LDFLAGS' => "#$LDFLAGS #{ldflags}",
                                'LIBPATH' => libpathflag(libpath),
                                'LOCAL_LIBS' => "#$LOCAL_LIBS #$libs",
                                'LIBS' => "#$LIBRUBYARG_STATIC #{opt} #$LIBS")
  RbConfig::expand(TRY_LINK.dup, conf)
end












#log_src(src) ⇒ Object










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# File 'lib/mkmfmf.rb', line 322

def log_src(src)
  src = src.split(/^/)
  fmt = "%#{src.size.to_s.size}d: %s"
  Logging::message <<"EOM"
checked program was:
/* begin */
EOM
  src.each_with_index {|line, no| Logging::message fmt, no+1, line}
  Logging::message <<"EOM"
/* end */

EOM
end












#macro_defined?(macro, src, opt = "", &b) ⇒ Boolean







This is used internally by the have_macro? method.








Returns:


    

  • 
(Boolean)

    • 










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# File 'lib/mkmfmf.rb', line 604

def macro_defined?(macro, src, opt = "", &b)
  src = src.sub(/[^\n]\z/, "\\&\n")
  try_compile(src + <<"SRC", opt, &b)
/*top*/
#ifndef #{macro}
# error
>>>>>> #{macro} undefined <<<<<<
#endif
SRC
end












#map_dir(dir, map = nil) ⇒ Object










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# File 'lib/mkmfmf.rb', line 152

def map_dir(dir, map = nil)
  map ||= INSTALL_DIRS
  map.inject(dir) {|d, (orig, new)| d.gsub(orig, new)}
end












#merge_libs(*libs) ⇒ Object










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# File 'lib/mkmfmf.rb', line 216

def merge_libs(*libs)
  libs.inject([]) do |x, y|
    xy = x & y
    xn = yn = 0
    y = y.inject([]) {|ary, e| ary.last == e ? ary : ary << e}
    y.each_with_index do |v, yi|
      if xy.include?(v)
        xi = [x.index(v), xn].max()
        x[xi, 1] = y[yn..yi]
        xn, yn = xi + (yi - yn + 1), yi + 1
      end
    end
    x.concat(y[yn..-1] || [])
  end
end












#message(*s) ⇒ Object










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# File 'lib/mkmfmf.rb', line 676

def message(*s)
  unless Logging.quiet and not $VERBOSE
    printf(*s)
    $stdout.flush
  end
end












#mkintpath(path) ⇒ Object










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# File 'lib/mkmfmf.rb', line 1437

def mkintpath(path)
  return File.expand_path( path ) unless $use_relative_paths
  return path
end












#mkmf_failed(path) ⇒ Object







Returns whether or not the Makefile was successfully generated. If not, the script will abort with an error message.


Internal use only.















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# File 'lib/mkmfmf.rb', line 2018

def mkmf_failed(path)
  unless $makefile_created or File.exist?("Makefile")
    opts = $arg_config.collect {|t, n| "\t#{t}#{n ? "=#{n}" : ""}\n"}
    abort "*** #{path} failed ***\n" + FailedMessage + opts.join
  end
end












#modified?(target, times) ⇒ Boolean







Returns time stamp of the target file if it exists and is newer than or equal to all of times.








Returns:


    

  • 
(Boolean)

    • 










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# File 'lib/mkmfmf.rb', line 210

def modified?(target, times)
  (t = File.mtime(target)) rescue return nil
  Array === times or times = [times]
  t if times.all? {|n| n <= t}
end












#pkg_config(pkg) ⇒ Object







Handles meta information about installed libraries. Uses your platform’s pkg-config program if it has one.















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# File 'lib/mkmfmf.rb', line 1373

def pkg_config(pkg)
  if pkgconfig = with_config("#{pkg}-config") and find_executable0(pkgconfig)
    # iff package specific config command is given
    get = proc {|opt| `#{pkgconfig} --#{opt}`.chomp}
  elsif ($PKGCONFIG ||=
         (pkgconfig = with_config("pkg-config", ("pkg-config" unless CROSS_COMPILING))) &&
         find_executable0(pkgconfig) && pkgconfig) and
      system("#{$PKGCONFIG} --exists #{pkg}")
    # default to pkg-config command
    get = proc {|opt| `#{$PKGCONFIG} --#{opt} #{pkg}`.chomp}
  elsif find_executable0(pkgconfig = "#{pkg}-config")
    # default to package specific config command, as a last resort.
    get = proc {|opt| `#{pkgconfig} --#{opt}`.chomp}
  end
  if get
    cflags = get['cflags']
    ldflags = get['libs']
    libs = get['libs-only-l']
    ldflags = (Shellwords.shellwords(ldflags) - Shellwords.shellwords(libs)).quote.join(" ")
    $CFLAGS += " " << cflags
    $LDFLAGS += " " << ldflags
    $libs += " " << libs
    Logging::message "package configuration for %s\n", pkg
    Logging::message "cflags: %s\nldflags: %s\nlibs: %s\n\n",
                     cflags, ldflags, libs
    [cflags, ldflags, libs]
  else
    Logging::message "package configuration for %s is not found\n", pkg
    nil
  end
end












#relative_from(path, base) ⇒ Object










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# File 'lib/mkmfmf.rb', line 83

def relative_from(path, base)
  dir = File.join(path, "")
  if File.expand_path(dir) == File.expand_path(dir, base)
    path
  else
    File.join(base, path)
  end
end












#rm_f(*files) ⇒ Object










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# File 'lib/mkmfmf.rb', line 198

def rm_f(*files)
  opt = (Hash === files.last ? [files.pop] : [])
  FileUtils.rm_f(Dir[*files.flatten], *opt)
end












#rm_rf(*files) ⇒ Object










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# File 'lib/mkmfmf.rb', line 203

def rm_rf(*files)
  opt = (Hash === files.last ? [files.pop] : [])
  FileUtils.rm_rf(Dir[*files.flatten], *opt)
end












#scalar_ptr_type?(type, member = nil, headers = nil, &b) ⇒ Boolean







Used internally by the what_type? method to determine if type is a scalar pointer.








Returns:


    

  • 
(Boolean)

    • 










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# File 'lib/mkmfmf.rb', line 1066

def scalar_ptr_type?(type, member = nil, headers = nil, &b)
  try_compile(<<"SRC", &b)   # pointer
#{cpp_include(headers)}
/*top*/
volatile #{type} conftestval;
#{MAIN_DOES_NOTHING}
int t() {return (int)(1-*(conftestval#{member ? ".#{member}" : ""}));}
SRC
end












#scalar_type?(type, member = nil, headers = nil, &b) ⇒ Boolean







Used internally by the what_type? method to determine if type is a scalar pointer.








Returns:


    

  • 
(Boolean)

    • 










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# File 'lib/mkmfmf.rb', line 1078

def scalar_type?(type, member = nil, headers = nil, &b)
  try_compile(<<"SRC", &b)   # pointer
#{cpp_include(headers)}
/*top*/
volatile #{type} conftestval;
#{MAIN_DOES_NOTHING}
int t() {return (int)(1-(conftestval#{member ? ".#{member}" : ""}));}
SRC
end












#try_compile(src, opt = "", &b) ⇒ Object










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# File 'lib/mkmfmf.rb', line 446

def try_compile(src, opt="", &b)
  try_do(src, cc_command(opt), &b)
ensure
  rm_f "conftest*"
end












#try_const(const, headers = nil, opt = "", &b) ⇒ Object










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# File 'lib/mkmfmf.rb', line 954

def try_const(const, headers = nil, opt = "", &b)
  const, type = *const
  if try_compile(<<"SRC", opt, &b)
#{cpp_include(headers)}
/*top*/
typedef #{type || 'int'} conftest_type;
conftest_type conftestval = #{type ? '' : '(int)'}#{const};
SRC
    $defs.push(format("-DHAVE_CONST_%s", const.tr_cpp))
    true
  else
    false
  end
end












#try_constant(const, headers = nil, opt = "", &b) ⇒ Object










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# File 'lib/mkmfmf.rb', line 504

def try_constant(const, headers = nil, opt = "", &b)
  includes = cpp_include(headers)
  if CROSS_COMPILING
    if try_static_assert("#{const} > 0", headers, opt)
      # positive constant
    elsif try_static_assert("#{const} < 0", headers, opt)
      neg = true
      const = "-(#{const})"
    elsif try_static_assert("#{const} == 0", headers, opt)
      return 0
    else
      # not a constant
      return nil
    end
    upper = 1
    lower = 0
    until try_static_assert("#{const} <= #{upper}", headers, opt)
      lower = upper
      upper <<= 1
    end
    return nil unless lower
    while upper > lower + 1
      mid = (upper + lower) / 2
      if try_static_assert("#{const} > #{mid}", headers, opt)
        lower = mid
      else
        upper = mid
      end
    end
    upper = -upper if neg
    return upper
  else
    src = %{#{includes}
#include <stdio.h>
/*top*/
int conftest_const = (int)(#{const});
int main() {printf("%d\\n", conftest_const); return 0;}
}
    if try_link0(src, opt, &b)
      xpopen("./conftest") do |f|
        return Integer(f.gets)
      end
    end
  end
  nil
end












#try_cpp(src, opt = "", &b) ⇒ Object










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# File 'lib/mkmfmf.rb', line 452

def try_cpp(src, opt="", &b)
  try_do(src, cpp_command(CPPOUTFILE, opt), &b)
ensure
  rm_f "conftest*"
end












#try_do(src, command, &b) ⇒ Object










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# File 'lib/mkmfmf.rb', line 364

def try_do(src, command, &b)
  unless have_devel?
    raise <<MSG
The complier failed to generate an executable file.
You have to install development tools first.
MSG
  end
  begin
    src = create_tmpsrc(src, &b)
    xsystem(command)
  ensure
    log_src(src)
    rm_rf 'conftest.dSYM'
  end
end












#try_func(func, libs, headers = nil, &b) ⇒ Object










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# File 'lib/mkmfmf.rb', line 551

def try_func(func, libs, headers = nil, &b)
  headers = cpp_include(headers)
  try_link(<<"SRC", libs, &b) or
  try_link(<<"SRC", libs, &b)
#{headers}
/*top*/
#{MAIN_DOES_NOTHING}
int t() { #{func}(); return 0; }
SRC
end












#try_link(src, opt = "", &b) ⇒ Object










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# File 'lib/mkmfmf.rb', line 440

def try_link(src, opt="", &b)
  try_link0(src, opt, &b)
ensure
  rm_f "conftest*", "c0x32*"
end












#try_link0(src, opt = "", &b) ⇒ Object










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# File 'lib/mkmfmf.rb', line 423

def try_link0(src, opt="", &b)
  cmd = link_command("", opt)
  if $universal
    require 'tmpdir'
    Dir.mktmpdir("mkmf_", oldtmpdir = ENV["TMPDIR"]) do |tmpdir|
      begin
        ENV["TMPDIR"] = tmpdir
        try_do(src, cmd, &b)
      ensure
        ENV["TMPDIR"] = oldtmpdir
      end
    end
  else
    try_do(src, cmd, &b)
  end
end












#try_run(src, opt = "", &b) ⇒ Object










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# File 'lib/mkmfmf.rb', line 615

def try_run(src, opt = "", &b)
  if try_link0(src, opt, &b)
    xsystem("./conftest")
  else
    nil
  end
ensure
  rm_f "conftest*"
end












#try_static_assert(expr, headers = nil, opt = "", &b) ⇒ Object










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# File 'lib/mkmfmf.rb', line 495

def try_static_assert(expr, headers = nil, opt = "", &b)
  headers = cpp_include(headers)
  try_compile(<<SRC, opt, &b)
#{headers}
/*top*/
int conftest_const[(#{expr}) ? 1 : -1];
SRC
end












#try_type(type, headers = nil, opt = "", &b) ⇒ Object










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# File 'lib/mkmfmf.rb', line 901

def try_type(type, headers = nil, opt = "", &b)
  if try_compile(<<"SRC", opt, &b)
#{cpp_include(headers)}
/*top*/
typedef #{type} conftest_type;
int conftestval[sizeof(conftest_type)?1:-1];
SRC
    $defs.push(format("-DHAVE_TYPE_%s", type.tr_cpp))
    true
  else
    false
  end
end












#try_var(var, headers = nil, &b) ⇒ Object










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# File 'lib/mkmfmf.rb', line 567

def try_var(var, headers = nil, &b)
  headers = cpp_include(headers)
  try_compile(<<"SRC", &b)
#{headers}
/*top*/
#{MAIN_DOES_NOTHING}
int t() { const volatile void *volatile p; p = &(&#{var})[0]; return 0; }
SRC
end












#use_relative_paths ⇒ Object










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# File 'lib/mkmfmf.rb', line 1621

def use_relative_paths
  $use_relative_paths = true
  yield if block_given?
end












#what_type?(type, member = nil, headers = nil, &b) ⇒ Boolean













Returns:


    

  • 
(Boolean)

    • 










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# File 'lib/mkmfmf.rb', line 1100

def what_type?(type, member = nil, headers = nil, &b)
  m = "#{type}"
  var = val = "*rbcv_var_"
  func = "rbcv_func_(void)"
  if member
    m << "." << member
  else
    type, member = type.split('.', 2)
  end
  if member
    val = "(#{var}).#{member}"
  end
  prelude = [cpp_include(headers).split(/^/)]
  prelude << ["typedef #{type} rbcv_typedef_;\n",
              "extern rbcv_typedef_ *#{func};\n",
              "static rbcv_typedef_ #{var};\n",
             ]
  type = "rbcv_typedef_"
  fmt = member && !(typeof = have_typeof?) ? "seems %s" : "%s"
  if typeof
    var = "*rbcv_member_"
    func = "rbcv_mem_func_(void)"
    member = nil
    type = "rbcv_mem_typedef_"
    prelude[-1] << "typedef #{typeof}(#{val}) #{type};\n"
    prelude[-1] << "extern #{type} *#{func};\n"
    prelude[-1] << "static #{type} #{var};\n"
    val = var
  end
  def fmt.%(x)
    x ? super : "unknown"
  end
  checking_for checking_message(m, headers), fmt do
    if scalar_ptr_type?(type, member, prelude, &b)
      if try_static_assert("sizeof(*#{var}) == 1", prelude)
        return "string"
      end
      ptr = "*"
    elsif scalar_type?(type, member, prelude, &b)
      unless member and !typeof or try_static_assert("(#{type})-1 < 0", prelude)
        unsigned = "unsigned"
      end
      ptr = ""
    else
      next
    end
    type = UNIVERSAL_INTS.find do |t|
      pre = prelude
      unless member
        pre += [["static #{unsigned} #{t} #{ptr}#{var};\n",
                 "extern #{unsigned} #{t} #{ptr}*#{func};\n"]]
      end
      try_static_assert("sizeof(#{ptr}#{val}) == sizeof(#{unsigned} #{t})", pre)
    end
    type or next
    [unsigned, type, ptr].join(" ").strip
  end
end












#winsep(s) ⇒ Object







Converts forward slashes to backslashes. Aimed at MS Windows.


Internal use only.















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# File 'lib/mkmfmf.rb', line 1414

def winsep(s)
  s.tr('/', '\\')
end












#with_cflags(flags) ⇒ Object










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# File 'lib/mkmfmf.rb', line 479

def with_cflags(flags)
  cflags = $CFLAGS
  $CFLAGS = flags
  ret = yield
ensure
  $CFLAGS = cflags unless ret
end












#with_config(config, default = nil) ⇒ Object







Tests for the presence of a –with-config or –without-config option. Returns true if the with option is given, false if the without option is given, and the default value otherwise.


This can be useful for adding custom definitions, such as debug information.


Example:


if with_config("debug")
   $defs.push("-DOSSL_DEBUG") unless $defs.include? "-DOSSL_DEBUG"
end
















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# File 'lib/mkmfmf.rb', line 1231

def with_config(config, default=nil)
  config = config.sub(/^--with[-_]/, '')
  val = arg_config("--with-"+config) do
    if arg_config("--without-"+config)
      false
    elsif block_given?
      yield(config, default)
    else
      break default
    end
  end
  case val
  when "yes"
    true
  when "no"
    false
  else
    val
  end
end












#with_cppflags(flags) ⇒ Object










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# File 'lib/mkmfmf.rb', line 471

def with_cppflags(flags)
  cppflags = $CPPFLAGS
  $CPPFLAGS = flags
  ret = yield
ensure
  $CPPFLAGS = cppflags unless ret
end












#with_destdir(dir) ⇒ Object










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# File 'lib/mkmfmf.rb', line 1405

def with_destdir(dir)
  dir = dir.sub($dest_prefix_pattern, '')
  /\A\$[\(\{]/ =~ dir ? dir : "$(DESTDIR)"+dir
end












#with_ldflags(flags) ⇒ Object










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# File 'lib/mkmfmf.rb', line 487

def with_ldflags(flags)
  ldflags = $LDFLAGS
  $LDFLAGS = flags
  ret = yield
ensure
  $LDFLAGS = ldflags unless ret
end












#xpopen(command, *mode, &block) ⇒ Object










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# File 'lib/mkmfmf.rb', line 310

def xpopen command, *mode, &block
  Logging::open do
    case mode[0]
    when nil, /^r/
      puts "#{command} |"
    else
      puts "| #{command}"
    end
    IO.popen(command, *mode, &block)
  end
end












#xsystem(command) ⇒ Object










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# File 'lib/mkmfmf.rb', line 297

def xsystem command
  varpat = /\$\((\w+)\)|\$\{(\w+)\}/
  if varpat =~ command
    vars = Hash.new {|h, k| h[k] = ''; ENV[k]}
    command = command.dup
    nil while command.gsub!(varpat) {vars[$1||$2]}
  end
  Logging::open do
    puts command.quote
    system(command)
  end
end