import Options
import platform

PLATFORM_IS_DARWIN = platform.platform().find('Darwin') == 0

def set_options(opt):
  pass
  #opt.tool_options('compiler_cc')

def configure(conf):
  print "--- libev ---"
  #conf.check_tool('compiler_cc')

  conf.check_cc(header_name="sys/inotify.h")
  have_epoll = conf.check_cc(header_name="sys/epoll.h")
  conf.check_cc(header_name="sys/event.h")
  conf.check_cc(header_name="sys/queue.h")
  conf.check_cc(header_name="port.h")
  conf.check_cc(header_name="poll.h")
  conf.check_cc(header_name="sys/select.h")
  conf.check_cc(header_name="sys/eventfd.h")
  conf.check_cc(header_name="sys/inotify.h", function_name="inotify_init")
  if have_epoll:
    code = """
        #include <sys/epoll.h>

        int main() {
        epoll_ctl(0, 0, 0, NULL);
            return 0;
        }
    """
    conf.check_cc(fragment=code, define_name="HAVE_EPOLL_CTL", msg="Checking for epoll_ctl")

  if PLATFORM_IS_DARWIN:
    conf.check_cc(header_name="sys/event.h", function_name="kqueue")
  else:
    conf.check_cc(header_name="sys/queue.h", function_name="kqueue")
  conf.check_cc(header_name="port.h", function_name="port_create")
  conf.check_cc(header_name="poll.h", function_name="poll")
  conf.check_cc(header_name="sys/select.h", function_name="select")
  conf.check_cc(header_name="sys/eventfd.h", function_name="eventfd")
  code = """
      #include <syscall.h>
      #include <time.h>
      #include <stdio.h>

      int main() {
          struct timespec ts; 
          int status = syscall(SYS_clock_gettime, CLOCK_REALTIME, &ts);
          puts("1"); // fucking waf...
          return 0;
      }
  """
  conf.check_cc(fragment=code, define_name="HAVE_CLOCK_SYSCALL", execute=True,
                msg="Checking for SYS_clock_gettime")

  have_librt = conf.check(lib='rt', uselib_store='RT')
  if have_librt:
    conf.check_cc(lib="rt", header_name="time.h", function_name="clock_gettime")
  if PLATFORM_IS_DARWIN:
    conf.check_cc(header_name="time.h", function_name="nanosleep")
  elif have_librt:
    conf.check_cc(lib="rt", header_name="time.h", function_name="nanosleep")
  conf.check_cc(lib="m", header_name="math.h", function_name="ceil")

  conf.define("HAVE_CONFIG_H", 1)

  conf.env.append_value('CCFLAGS', ['-DEV_MULTIPLICITY=0'])
  conf.env.append_value('CXXFLAGS', ['-DEV_MULTIPLICITY=0'])

def build(bld):
  libev = bld.new_task_gen("cc")
  libev.source = 'ev.c'
  libev.target = 'ev'
  libev.name = 'ev'
  libev.includes = '. ../..'
  libev.uselib = "RT"
  libev.install_path = None
  if bld.env["USE_DEBUG"]:
    libev.clone("debug");
  bld.install_files('${PREFIX}/include/node/', 'ev.h');