HAVE_POPEN       2417 magick/blob.c  #if defined(HAVE_POPEN)
HAVE_POPEN        407 magick/resource.c #  elif defined(MAGICK_PHYSICAL_MEMORY_COMMAND) && defined(HAVE_POPEN)
HAVE_POPEN        421 magick/studio.h #if !defined(HAVE_POPEN) && defined(HAVE__POPEN)