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  | 
require 'formula'
class Ruby < Formula
  homepage 'https://www.ruby-lang.org/'
  url 'http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.0.tar.bz2'
  sha256 '1d3f4ad5f619ec15229206b6667586dcec7cc986672c8fbb8558161ecf07e277'
  head do
    url 'http://svn.ruby-lang.org/repos/ruby/trunk/'
    depends_on :autoconf
  end
  option :universal
  option 'with-suffix', 'Suffix commands with "21"'
  option 'with-doc', 'Install documentation'
  option 'with-tcltk', 'Install with Tcl/Tk support'
  depends_on 'pkg-config' => :build
  depends_on 'readline' => :recommended
  depends_on 'gdbm' => :optional
  depends_on 'gmp' => :optional
  depends_on 'libffi' => :optional
  depends_on 'libyaml'
  depends_on 'openssl'
  depends_on :x11 if build.with? 'tcltk'
  fails_with :llvm do
    build 2326
  end
  # pthread_setname_np() is unavailable before Snow Leopard
  # Reported upstream: https://bugs.ruby-lang.org/issues/9492
  def patches; DATA; end if MacOS.version < :snow_leopard
  def install
    system "autoconf" if build.head?
    args = %W[--prefix=#{prefix} --enable-shared --disable-silent-rules]
    args << "--program-suffix=21" if build.with? "suffix"
    args << "--with-arch=#{Hardware::CPU.universal_archs.join(',')}" if build.universal?
    args << "--with-out-ext=tk" unless build.with? "tcltk"
    args << "--disable-install-doc" unless build.with? "doc"
    args << "--disable-dtrace" unless MacOS::CLT.installed?
    paths = []
    paths.concat %w[readline gdbm gmp libffi].map { |dep|
      Formula.factory(dep).opt_prefix if build.with? dep
    }.compact
    paths.concat %w[libyaml openssl].map { |dep|
      Formula.factory(dep).opt_prefix
    }
    args << "--with-opt-dir=#{paths.join(":")}"
    # Put gem, site and vendor folders in the HOMEBREW_PREFIX
    ruby_lib = HOMEBREW_PREFIX/"lib/ruby"
    (ruby_lib/'site_ruby').mkpath
    (ruby_lib/'vendor_ruby').mkpath
    (ruby_lib/'gems').mkpath
    (lib/'ruby').install_symlink ruby_lib/'site_ruby',
                                 ruby_lib/'vendor_ruby',
                                 ruby_lib/'gems'
    system "./configure", *args
    system "make"
    system "make install"
  end
  def caveats; <<-EOS.undent
    By default, gem installed executables will be placed into:
      #{opt_prefix}/bin
    You may want to add this to your PATH. After upgrades, you can run
      gem pristine --all --only-executables
    to restore binstubs for installed gems.
    EOS
  end
end
__END__
diff --git a/thread_pthread.c b/thread_pthread.c
index 3911f8f..74d1ab7 100644
--- a/thread_pthread.c
+++ b/thread_pthread.c
@@ -1416,15 +1416,6 @@ timer_thread_sleep(rb_global_vm_lock_t* unused)
 }
 #endif /* USE_SLEEPY_TIMER_THREAD */
 
-#if defined(__linux__) && defined(PR_SET_NAME)
-# define SET_THREAD_NAME(name) prctl(PR_SET_NAME, name)
-#elif defined(__APPLE__)
-/* pthread_setname_np() on Darwin does not have target thread argument */
-# define SET_THREAD_NAME(name) pthread_setname_np(name)
-#else
-# define SET_THREAD_NAME(name) (void)0
-#endif
-
 static void *
 thread_timer(void *p)
 {
@@ -1432,7 +1423,9 @@ thread_timer(void *p)
 
     if (TT_DEBUG) WRITE_CONST(2, "start timer thread\n");
 
-    SET_THREAD_NAME("ruby-timer-thr");
+#if defined(__linux__) && defined(PR_SET_NAME)
+    prctl(PR_SET_NAME, "ruby-timer-thr");
+#endif
 
 #if !USE_SLEEPY_TIMER_THREAD
     native_mutex_initialize(&timer_thread_lock);
  |