Re: stdint module rewrite (was: Re: Build CVS (TRUNK) failed.)

[Mark D. Baushke]

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Hi Bruno,

No values are assigned to some of the BITSIZEOF_* macros in the config.h
file:

/* Define to the number of bits in type 'int_fast16_t'. */
/* #undef BITSIZEOF_INT_FAST16_T */

/* Define to the number of bits in type 'int_fast32_t'. */
/* #undef BITSIZEOF_INT_FAST32_T */

/* Define to the number of bits in type 'int_fast64_t'. */
/* #undef BITSIZEOF_INT_FAST64_T */

/* Define to the number of bits in type 'int_fast8_t'. */
/* #undef BITSIZEOF_INT_FAST8_T */

/* Define to the number of bits in type 'uint_fast16_t'. */
/* #undef BITSIZEOF_UINT_FAST16_T */

/* Define to the number of bits in type 'uint_fast32_t'. */
/* #undef BITSIZEOF_UINT_FAST32_T */

/* Define to the number of bits in type 'uint_fast64_t'. */
/* #undef BITSIZEOF_UINT_FAST64_T */

/* Define to the number of bits in type 'uint_fast8_t'. */
/* #undef BITSIZEOF_UINT_FAST8_T */

which leads to interesting substitutions in the generated Makefile

BITSIZEOF_INT16_T = 16
BITSIZEOF_INT32_T = 32
BITSIZEOF_INT64_T = 64
BITSIZEOF_INT8_T = 8
BITSIZEOF_INTMAX_T = 64
BITSIZEOF_INTPTR_T = 32
BITSIZEOF_INT_FAST16_T = 
BITSIZEOF_INT_FAST32_T = 
BITSIZEOF_INT_FAST64_T = 
BITSIZEOF_INT_FAST8_T = 
BITSIZEOF_INT_LEAST16_T = 16
BITSIZEOF_INT_LEAST32_T = 32
BITSIZEOF_INT_LEAST64_T = 64
BITSIZEOF_INT_LEAST8_T = 8
BITSIZEOF_LONG = 32
BITSIZEOF_PTRDIFF_T = 32
BITSIZEOF_SIG_ATOMIC_T = 32
BITSIZEOF_SIZE_T = 32
BITSIZEOF_UINT16_T = 16
BITSIZEOF_UINT32_T = 32
BITSIZEOF_UINT64_T = 64
BITSIZEOF_UINT8_T = 8
BITSIZEOF_UINTMAX_T = 64
BITSIZEOF_UINTPTR_T = 32
BITSIZEOF_UINT_FAST16_T = 
BITSIZEOF_UINT_FAST32_T = 
BITSIZEOF_UINT_FAST64_T = 
BITSIZEOF_UINT_FAST8_T = 
BITSIZEOF_UINT_LEAST16_T = 16
BITSIZEOF_UINT_LEAST32_T = 32
BITSIZEOF_UINT_LEAST64_T = 64
BITSIZEOF_UINT_LEAST8_T = 8
BITSIZEOF_UNSIGNED_INT = 32
BITSIZEOF_UNSIGNED_LONG = 32
BITSIZEOF_WCHAR_T = 32
BITSIZEOF_WINT_T = 32

and is propagated into the stdint.h file. For example, on a machine
which does not define UINT_FAST16_MAX (Solaris 9), I see the following:

#if 0
# ifndef UINT_FAST16_MAX
#  if  < 32
#   define UINT_FAST16_MAX  (((1 << ( - 1)) - 1) * 2 + 1)
#  else
#   define UINT_FAST16_MAX  (((1UL << ( - 1)) - 1) * 2 + 1)
#  endif
# endif
#else
# if _STDINT_H_INT64_FASTER_THAN_INT32
#  define UINT_FAST16_MAX  UINT64_MAX
# else
#  define UINT_FAST16_MAX  UINT32_MAX
# endif
#endif

I am not at all certain that all compilers will ignore illegal
preprocessor expressions in a '#if 0' block. So, should some
other expression for '#  if  < 32' be generated?

        -- Mark

Bruno Haible <address@hidden> writes:

> Mark D. Baushke wrote:
> > This rewrite works for FreeBSD 4.2, FreeBSD 5.2, FreeBSD 6.1.
> 
> After
>  - rewriting it again to produce a standalone stdint.h (that doesn't
>    need anything from config.h),
>  - reducing the generated configure shell code, using Ralf's trick,
>  - adding a test suite module,
>  - further testing, I committed this rewrite.
> 
> Happy using <stdint.h> !
> 
> Bruno
> 
> 
> 2006-06-15  Bruno Haible  <address@hidden>
> 
>       * modules/stdint (Files): Include m4/full-header-path.m4,
>       m4/size_max.m4, m4/wchar_t.m4.
>       (Makefile.am): Many more substitutions.
>       * modules/stdint-tests: New file.
>       * tests/test-stdint.c: New file.
>       * m4/stdint.m4 (gl_STDINT_H): Rewritten to produce a complete stdint.h.
>       (gl_HEADER_STDINT_H, gl_HEADER_INTTYPES_H, gl_STDINT_CHECK_TYPES,
>       gl_STDINT_MISSING_BOUND, gl_STDINT_MISSING_BOUNDS,
>       gl_STDINT_MISSING_BOUNDS2, gl_STDINT_BITSIZEOF, gl_CHECK_TYPES_SIGNED,
>       gl_CHECK_TYPE_SAME): New macros.
>       * lib/stdint_.h: Rewritten to be fully auto-configured.
>       Fixes bug on HP-UX/IA64.
> 
...
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