=provides

/^#\s*define\s+(\w+)/

=implementation

#ifndef IVdf
#  if IVSIZE == LONGSIZE
#    define	IVdf      "ld"
#    define	UVuf      "lu"
#    define	UVof      "lo"
#    define	UVxf      "lx"
#    define	UVXf      "lX"
#  else
#    if IVSIZE == INTSIZE
#      define	IVdf      "d"
#      define	UVuf      "u"
#      define	UVof      "o"
#      define	UVxf      "x"
#      define	UVXf      "X"
#    endif
#  endif
#endif

#ifndef NVef
#  if defined(USE_LONG_DOUBLE) && defined(HAS_LONG_DOUBLE) && \
      defined(PERL_PRIfldbl) /* Not very likely, but let's try anyway. */ 
#    define NVef          PERL_PRIeldbl
#    define NVff          PERL_PRIfldbl
#    define NVgf          PERL_PRIgldbl
#  else
#    define NVef          "e"
#    define NVff          "f"
#    define NVgf          "g"
#  endif
#endif