1 files changed, 168 insertions, 0 deletions
diff --git a/jni/ruby/ext/fiddle/extconf.rb b/jni/ruby/ext/fiddle/extconf.rb
new file mode 100644
index 0000000..5688086
--- /dev/null
+++ b/jni/ruby/ext/fiddle/extconf.rb
@@ -0,0 +1,168 @@
+require 'mkmf'
+
+# :stopdoc:
+
+if ! enable_config('bundled-libffi', false)
+  dir_config 'libffi'
+
+  pkg_config("libffi") and
+    ver = pkg_config("libffi", "modversion")
+
+  if have_header(ffi_header = 'ffi.h')
+    true
+  elsif have_header(ffi_header = 'ffi/ffi.h')
+    $defs.push(format('-DUSE_HEADER_HACKS'))
+    true
+  end and (have_library('ffi') || have_library('libffi'))
+end or
+begin
+  ver = Dir.glob("#{$srcdir}/libffi-*/")
+        .map {|n| File.basename(n)}
+        .max_by {|n| n.scan(/\d+/).map(&:to_i)}
+  unless ver
+    raise "missing libffi. Please install libffi."
+  end
+
+  srcdir = "#{$srcdir}/#{ver}"
+  ffi_header = 'ffi.h'
+  libffi = Struct.new(*%I[dir srcdir builddir include lib a cflags ldflags opt arch]).new
+  libffi.dir = ver
+  if $srcdir == "."
+    libffi.builddir = "#{ver}/#{RUBY_PLATFORM}"
+    libffi.srcdir = "."
+  else
+    libffi.builddir = libffi.dir
+    libffi.srcdir = relative_from(srcdir, "..")
+  end
+  libffi.include = "#{libffi.builddir}/include"
+  libffi.lib = "#{libffi.builddir}/.libs"
+  libffi.a = "#{libffi.lib}/libffi_convenience.#{$LIBEXT}"
+  nowarn = CONFIG.merge("warnflags"=>"")
+  libffi.cflags = RbConfig.expand("$(CFLAGS)", nowarn)
+  ver = ver[/libffi-(.*)/, 1]
+
+  FileUtils.mkdir_p(libffi.dir)
+  libffi.opt = CONFIG['configure_args'][/'(-C)'/, 1]
+  libffi.ldflags = RbConfig.expand("$(LDFLAGS) #{libpathflag([relative_from($topdir, "..")])} #{$LIBRUBYARG}")
+  libffi.arch = RbConfig::CONFIG['host']
+  if $mswin
+    $defs << "-DFFI_BUILDING"
+    libffi_config = "#{relative_from($srcdir, '..')}/win32/libffi-config.rb"
+    config = CONFIG.merge("top_srcdir" => $top_srcdir)
+    args = $ruby.gsub(/:\/=\\/, '')
+    args.gsub!(/\)\\/, ')/')
+    args = args.shellsplit
+    args.map! {|s| RbConfig.expand(s, config)}
+    args << '-C' << libffi.dir << libffi_config
+    opts = {}
+  else
+    args = %W[sh #{libffi.srcdir}/configure ]
+    opts = {chdir: libffi.dir}
+  end
+  cc = RbConfig::CONFIG['CC']
+  cxx = RbConfig::CONFIG['CXX']
+  ld = RbConfig::CONFIG['LD']
+  args.concat %W[
+    --srcdir=#{libffi.srcdir}
+    --host=#{libffi.arch}
+    --enable-builddir=#{RUBY_PLATFORM}
+  ]
+  args << ($enable_shared || !$static ? '--enable-shared' : '--enable-static')
+  args << libffi.opt if libffi.opt
+  args.concat %W[
+      CC=#{cc} CFLAGS=#{libffi.cflags}
+      CXX=#{cxx} CXXFLAGS=#{RbConfig.expand("$(CXXFLAGS)", nowarn)}
+      LD=#{ld} LDFLAGS=#{libffi.ldflags}
+  ]
+
+  FileUtils.rm_f("#{libffi.include}/ffitarget.h")
+  Logging::open do
+    Logging.message("%p in %p\n", args, opts)
+    system(*args, **opts) or
+      raise "failed to configure libffi. Please install libffi."
+  end
+  if $mswin && File.file?("#{libffi.include}/ffitarget.h")
+    FileUtils.rm_f("#{libffi.include}/ffitarget.h")
+  end
+  unless File.file?("#{libffi.include}/ffitarget.h")
+    FileUtils.cp("#{srcdir}/src/x86/ffitarget.h", libffi.include, preserve: true)
+  end
+  $INCFLAGS << " -I" << libffi.include
+end
+
+if ver
+  ver = ver.gsub(/-rc\d+/, '') # If ver contains rc version, just ignored.
+  ver = (ver.split('.') + [0,0])[0,3]
+  $defs.push(%{-DRUBY_LIBFFI_MODVERSION=#{ '%d%03d%03d' % ver }})
+end
+
+have_header 'sys/mman.h'
+
+if have_header "dlfcn.h"
+  have_library "dl"
+
+  %w{ dlopen dlclose dlsym }.each do |func|
+    abort "missing function #{func}" unless have_func(func)
+  end
+
+  have_func "dlerror"
+elsif have_header "windows.h"
+  %w{ LoadLibrary FreeLibrary GetProcAddress }.each do |func|
+    abort "missing function #{func}" unless have_func(func)
+  end
+end
+
+have_const('FFI_STDCALL', ffi_header)
+
+config = File.read(RbConfig.expand(File.join($arch_hdrdir, "ruby/config.h")))
+types = {"SIZE_T"=>"SSIZE_T", "PTRDIFF_T"=>nil, "INTPTR_T"=>nil}
+types.each do |type, signed|
+  if /^\#define\s+SIZEOF_#{type}\s+(SIZEOF_(.+)|\d+)/ =~ config
+    if size = $2 and size != 'VOIDP'
+      size = types.fetch(size) {size}
+      $defs << format("-DTYPE_%s=TYPE_%s", signed||type, size)
+    end
+    if signed
+      check_signedness(type.downcase, "stddef.h")
+    end
+  end
+end
+
+if libffi
+  $LOCAL_LIBS.prepend("./#{libffi.a} ").strip!
+end
+create_makefile 'fiddle' do |conf|
+  if !libffi
+    next conf << "LIBFFI_CLEAN = none\n"
+  elsif $gnumake && !$nmake
+    submake = "$(MAKE) -C $(LIBFFI_DIR)\n"
+  else
+    submake = "cd $(LIBFFI_DIR) && \\\n\t\t" << "#{config_string("exec")} $(MAKE)".strip
+  end
+  if $nmake
+    cmd = "$(RUBY) -C $(LIBFFI_DIR) #{libffi_config} --srcdir=$(LIBFFI_SRCDIR)"
+  else
+    cmd = "cd $(LIBFFI_DIR) && #$exec $(LIBFFI_SRCDIR)/configure #{libffi.opt}"
+  end
+  sep = "/"
+  seprpl = config_string('BUILD_FILE_SEPARATOR') {|s| sep = s; ":/=#{s}" if s != "/"} || ""
+  conf << <<-MK.gsub(/^ +| +$/, '')
+   PWD =
+   LIBFFI_CONFIGURE = #{cmd}
+   LIBFFI_ARCH = #{libffi.arch}
+   LIBFFI_SRCDIR = #{libffi.srcdir}
+   LIBFFI_DIR = #{libffi.dir}
+   LIBFFI_A = #{libffi.a}
+   LIBFFI_CFLAGS = #{libffi.cflags}
+   LIBFFI_LDFLAGS = #{libffi.ldflags}
+   FFI_H = $(LIBFFI_DIR)/include/ffi.h
+   SUBMAKE_LIBFFI = #{submake}
+   LIBFFI_CLEAN = libffi
+  MK
+end
+
+if libffi
+  $LIBPATH.pop
+end
+
+# :startdoc: