MakeMakefile#create_makefile

create_makefile(target, srcprefix = nil) { |conf| ... }

# File tmp/rubies/ruby-3.3.0/lib/mkmf.rb, line 2271
  def create_makefile(target, srcprefix = nil)
    $target = target
    libpath = $DEFLIBPATH|$LIBPATH
    message "creating Makefile\n"
    MakeMakefile.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}"
    orig_srcs = Dir[File.join(srcdir, "*.{#{SRC_EXT.join(%q{,})}}")]
    if not $objs
      srcs = $srcs || orig_srcs
      $objs = []
      objs = srcs.inject(Hash.new {[]}) {|h, f|
        h.key?(o = File.basename(f, ".*") << ext) or $objs << o
        h[o] <<= f
        h
      }
      unless objs.delete_if {|b, f| f.size == 1}.empty?
        dups = objs.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

    hdrs = Dir[File.join(srcdir, "*.{#{HDR_EXT.join(%q{,})}}")]

    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 = %{$(RUBY) -pe "$$_.sub!(/^(?=\\w)/,'#{EXPORT_PREFIX}') unless 1../^EXPORTS$/i" #{deffile}}
        end
      else
        makedef = %{(echo EXPORTS && echo $(TARGET_ENTRY))}
      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.delete_prefix('./'))})
      $distcleandirs.concat($INSTALLFILES.collect {|files, dir| dir})
    end

    if $extmk and $static
      $defs << "-DRUBY_EXPORT=1"
    end

    if $extmk and not $extconf_h
      create_header
    end

    libpath = libpathflag(libpath)

    dllib = target ? "$(TARGET).#{CONFIG['DLEXT']}" : ""
    staticlib = target ? "$(TARGET).#$LIBEXT" : ""
    conf = configuration(srcprefix)
    conf << "\
libpath = #{($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}
ORIG_SRCS = #{orig_srcs.collect(&File.method(:basename)).join(' ')}
SRCS = $(ORIG_SRCS) #{(srcs - orig_srcs).collect(&File.method(:basename)).join(' ')}
OBJS = #{$objs.join(" ")}
HDRS = #{hdrs.map{|h| '$(srcdir)/' + File.basename(h)}.join(' ')}
LOCAL_HDRS = #{$headers.join(' ')}
TARGET = #{target}
TARGET_NAME = #{target && target[/\A\w+/]}
TARGET_ENTRY = #{EXPORT_PREFIX || ''}Init_$(TARGET_NAME)
DLLIB = #{dllib}
EXTSTATIC = #{$static || ""}
STATIC_LIB = #{staticlib unless $static.nil?}
#{!$extout && defined?($installed_list) ? "INSTALLED_LIST = #{$installed_list}\n" : ""}
TIMESTAMP_DIR = #{$extout && $extmk ? '$(extout)/.timestamp' : '.'}
" #"
    # TODO: fixme
    install_dirs.each {|d| conf << ("%-14s= %s\n" % d) if /^[[:upper:]]/ =~ d[0]}
    sodir = $extout ? '$(TARGET_SO_DIR)' : '$(RUBYARCHDIR)'
    n = '$(TARGET_SO_DIR)$(TARGET)'
    cleanobjs = ["$(OBJS)"]
    if $extmk
      %w[bc i s].each {|ex| cleanobjs << "$(OBJS:.#{$OBJEXT}=.#{ex})"}
    end
    if target
      config_string('cleanobjs') {|t| cleanobjs << t.gsub(/\$\*/, "$(TARGET)#{deffile ? '-$(arch)': ''}")}
    end
    conf << "\
TARGET_SO_DIR =#{$extout ? " $(RUBYARCHDIR)/" : ''}
TARGET_SO     = $(TARGET_SO_DIR)$(DLLIB)
CLEANLIBS     = #{'$(TARGET_SO) ' if target}#{config_string('cleanlibs') {|t| t.gsub(/\$\*/) {n}}}
CLEANOBJS     = #{cleanobjs.join(' ')} *.bak
TARGET_SO_DIR_TIMESTAMP = #{timestamp_file(sodir, target_prefix)}
" #"

    conf = yield(conf) if block_given?
    mfile = File.open("Makefile", "wb")
    mfile.puts(conf)
    mfile.print "
all:    #{$extout ? "install" : target ? "$(DLLIB)" : "Makefile"}
static: #{$extmk && !$static ? "all" : "$(STATIC_LIB)#{$extout ? " install-rb" : ""}"}
.PHONY: all install static install-so install-rb
.PHONY: clean clean-so clean-static 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.gsub(/(\$\{\w+)(\})/) {$1+sep+$2}
      }
      rsep = ":#{fsep}=/"
    else
      fseprepl = proc {|s| s}
      sep = ""
      rsep = ""
    end
    dirs = []
    mfile.print "install: install-so install-rb\n\n"
    dir = sodir.dup
    mfile.print("install-so: ")
    if target
      f = "$(DLLIB)"
      dest = "$(TARGET_SO)"
      stamp = '$(TARGET_SO_DIR_TIMESTAMP)'
      if $extout
        mfile.puts dest
        mfile.print "clean-so::\n"
        mfile.print "\t-$(Q)$(RM) #{fseprepl[dest]} #{fseprepl[stamp]}\n"
        mfile.print "\t-$(Q)$(RMDIRS) #{fseprepl[dir]}#{$ignore_error}\n"
      else
        mfile.print "#{f} #{stamp}\n"
        mfile.print "\t$(INSTALL_PROG) #{fseprepl[f]} #{dir}\n"
        if defined?($installed_list)
          mfile.print "\t@echo #{dir}/#{File.basename(f)}>>$(INSTALLED_LIST)\n"
        end
      end
      mfile.print "clean-static::\n"
      mfile.print "\t-$(Q)$(RM) $(STATIC_LIB)\n"
    else
      mfile.puts "Makefile"
    end
    mfile.print("install-rb: pre-install-rb do-install-rb install-rb-default\n")
    mfile.print("install-rb-default: pre-install-rb-default do-install-rb-default\n")
    mfile.print("pre-install-rb: Makefile\n")
    mfile.print("pre-install-rb-default: Makefile\n")
    mfile.print("do-install-rb:\n")
    mfile.print("do-install-rb-default:\n")
    for sfx, i in [["-default", [["lib/**/*.rb", "$(RUBYLIBDIR)", "lib"]]], ["", $INSTALLFILES]]
      files = install_files(mfile, i, nil, srcprefix) or next
      for dir, *files in files
        unless dirs.include?(dir)
          dirs << dir
          mfile.print "pre-install-rb#{sfx}: #{timestamp_file(dir, target_prefix)}\n"
        end
        for f in files
          dest = "#{dir}/#{File.basename(f)}"
          mfile.print("do-install-rb#{sfx}: #{dest}\n")
          mfile.print("#{dest}: #{f} #{timestamp_file(dir, target_prefix)}\n")
          mfile.print("\t$(Q) $(#{$extout ? 'COPY' : 'INSTALL_DATA'}) #{f} $(@D)\n")
          if defined?($installed_list) and !$extout
            mfile.print("\t@echo #{dest}>>$(INSTALLED_LIST)\n")
          end
          if $extout
            mfile.print("clean-rb#{sfx}::\n")
            mfile.print("\t-$(Q)$(RM) #{fseprepl[dest]}\n")
          end
        end
      end
      mfile.print "pre-install-rb#{sfx}:\n"
      if files.empty?
        mfile.print("\t@$(NULLCMD)\n")
      else
        q = "$(MAKE) -q do-install-rb#{sfx}"
        if $nmake
          mfile.print "!if \"$(Q)\" == \"@\"\n\t@#{q} || \\\n!endif\n\t"
        else
          mfile.print "\t$(Q1:0=@#{q} || )"
        end
        mfile.print "$(ECHO1:0=echo) installing#{sfx.sub(/^-/, " ")} #{target} libraries\n"
      end
      if $extout
        dirs.uniq!
        unless dirs.empty?
          mfile.print("clean-rb#{sfx}::\n")
          for dir in dirs.sort_by {|d| -d.count('/')}
            stamp = timestamp_file(dir, target_prefix)
            mfile.print("\t-$(Q)$(RM) #{fseprepl[stamp]}\n")
            mfile.print("\t-$(Q)$(RMDIRS) #{fseprepl[dir]}#{$ignore_error}\n")
          end
        end
      end
    end
    if target and !dirs.include?(sodir)
      mfile.print "$(TARGET_SO_DIR_TIMESTAMP):\n\t$(Q) $(MAKEDIRS) $(@D) #{sodir}\n\t$(Q) $(TOUCH) $@\n"
    end
    dirs.each do |d|
      t = timestamp_file(d, target_prefix)
      mfile.print "#{t}:\n\t$(Q) $(MAKEDIRS) $(@D) #{d}\n\t$(Q) $(TOUCH) $@\n"
    end

    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.print ".SUFFIXES: .#{(SRC_EXT + [$OBJEXT, $ASMEXT]).compact.join(' .')}\n"
    mfile.print "\n"

    compile_command = "\n\t$(ECHO) compiling $(<#{rsep})\n\t$(Q) %s\n\n"
    command = compile_command % COMPILE_CXX
    asm_command = compile_command.sub(/compiling/, 'translating') % ASSEMBLE_CXX
    CXX_EXT.each do |e|
      each_compile_rules do |rule|
        mfile.printf(rule, e, $OBJEXT)
        mfile.print(command)
        mfile.printf(rule, e, $ASMEXT)
        mfile.print(asm_command)
      end
    end
    command = compile_command % COMPILE_C
    asm_command = compile_command.sub(/compiling/, 'translating') % ASSEMBLE_C
    C_EXT.each do |e|
      each_compile_rules do |rule|
        mfile.printf(rule, e, $OBJEXT)
        mfile.print(command)
        mfile.printf(rule, e, $ASMEXT)
        mfile.print(asm_command)
      end
    end

    mfile.print "$(TARGET_SO): "
    mfile.print "$(DEFFILE) " if makedef
    mfile.print "$(OBJS) Makefile"
    mfile.print " $(TARGET_SO_DIR_TIMESTAMP)" if $extout
    mfile.print "\n"
    mfile.print "\t$(ECHO) linking shared-object #{target_prefix.sub(/\A\/(.*)/, '\1/')}$(DLLIB)\n"
    mfile.print "\t-$(Q)$(RM) $(@#{sep})\n"
    link_so = LINK_SO.gsub(/^/, "\t$(Q) ")
    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): $(OBJS)\n\t-$(Q)$(RM) $(@#{sep})\n\t"
      mfile.print "$(ECHO) linking static-library $(@#{rsep})\n\t$(Q) "
      mfile.print "$(AR) #{config_string('ARFLAGS') || 'cru '}$@ $(OBJS)"
      config_string('RANLIB') do |ranlib|
        mfile.print "\n\t-$(Q)#{ranlib} $(@)#{$ignore_error}"
      end
    end
    mfile.print "\n\n"
    if makedef
      mfile.print "$(DEFFILE): #{origdef}\n"
      mfile.print "\t$(ECHO) generating $(@#{rsep})\n"
      mfile.print "\t$(Q) #{makedef} > $@\n\n"
    end

    depend = File.join(srcdir, "depend")
    if File.exist?(depend)
      mfile.print("###\n", *depend_rules(File.read(depend)))
    else
      mfile.print "$(OBJS): $(HDRS) $(ruby_headers)\n"
    end

    $makefile_created = true
  ensure
    mfile.close if mfile
  end

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['sitearchdir'] that mimics your local filesystem when you run make install.

For example, given the following file tree:

Example

ext/
  extconf.rb
  test/
    foo.c

And given the following code:

Example

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.

See also #create_header #depend_rules #convertible_int #dir_config also in 4.1 · 4.0 · 3.4 · 3.2 · 3.1 · 3.0

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