diff options
Diffstat (limited to 'gl/m4/stdint.m4')
| -rw-r--r-- | gl/m4/stdint.m4 | 70 |
1 files changed, 48 insertions, 22 deletions
diff --git a/gl/m4/stdint.m4 b/gl/m4/stdint.m4 index 1a4b4a6a..bb6c34fe 100644 --- a/gl/m4/stdint.m4 +++ b/gl/m4/stdint.m4 @@ -1,5 +1,5 @@ -# stdint.m4 serial 22 -dnl Copyright (C) 2001-2002, 2004-2007 Free Software Foundation, Inc. +# stdint.m4 serial 29 +dnl Copyright (C) 2001-2007 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. @@ -45,32 +45,32 @@ AC_DEFUN([gl_STDINT_H], fi AC_SUBST([HAVE_SYS_TYPES_H]) - dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_stdint_h. + gl_CHECK_NEXT_HEADERS([stdint.h]) if test $ac_cv_header_stdint_h = yes; then - gl_ABSOLUTE_HEADER([stdint.h]) - ABSOLUTE_STDINT_H=\"$gl_cv_absolute_stdint_h\" HAVE_STDINT_H=1 else - ABSOLUTE_STDINT_H=\"no/such/file/stdint.h\" HAVE_STDINT_H=0 fi - AC_SUBST([ABSOLUTE_STDINT_H]) AC_SUBST([HAVE_STDINT_H]) - dnl Now see whether we need a substitute <stdint.h>. Use - dnl ABSOLUTE_STDINT_H, not <stdint.h>, so that it also works during - dnl a "config.status --recheck" if a stdint.h has been - dnl created in the build directory. + dnl Now see whether we need a substitute <stdint.h>. if test $ac_cv_header_stdint_h = yes; then AC_CACHE_CHECK([whether stdint.h conforms to C99], [gl_cv_header_working_stdint_h], [gl_cv_header_working_stdint_h=no AC_COMPILE_IFELSE([ AC_LANG_PROGRAM([[ -#include <stddef.h> #define __STDC_LIMIT_MACROS 1 /* to make it work also in C++ mode */ #define __STDC_CONSTANT_MACROS 1 /* to make it work also in C++ mode */ -#include ABSOLUTE_STDINT_H +#define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */ +#include <stdint.h> +/* Dragonfly defines WCHAR_MIN, WCHAR_MAX only in <wchar.h>. */ +#if !(defined WCHAR_MIN && defined WCHAR_MAX) +#error "WCHAR_MIN, WCHAR_MAX not defined in <stdint.h>" +#endif +] +gl_STDINT_INCLUDES +[ #ifdef INT8_MAX int8_t a1 = INT8_MAX; int8_t a1min = INT8_MIN; @@ -142,12 +142,32 @@ uintptr_t h = UINTPTR_MAX; #endif intmax_t i = INTMAX_MAX; uintmax_t j = UINTMAX_MAX; + +#include <limits.h> /* for CHAR_BIT */ +#define TYPE_MINIMUM(t) \ + ((t) ((t) 0 < (t) -1 ? (t) 0 : ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))) +#define TYPE_MAXIMUM(t) \ + ((t) ((t) 0 < (t) -1 ? (t) -1 : ~ (~ (t) 0 << (sizeof (t) * CHAR_BIT - 1)))) struct s { - int check_PTRDIFF: PTRDIFF_MIN < 0 && 0 < PTRDIFF_MAX ? 1 : -1; - int check_SIG_ATOMIC: SIG_ATOMIC_MIN <= 0 && 0 < SIG_ATOMIC_MAX ? 1 : -1; - int check_SIZE: 0 < SIZE_MAX ? 1 : -1; - int check_WCHAR: WCHAR_MIN <= 0 && 0 < WCHAR_MAX ? 1 : -1; - int check_WINT: WINT_MIN <= 0 && 0 < WINT_MAX ? 1 : -1; + int check_PTRDIFF: + PTRDIFF_MIN == TYPE_MINIMUM (ptrdiff_t) + && PTRDIFF_MAX == TYPE_MAXIMUM (ptrdiff_t) + ? 1 : -1; + /* Detect bug in FreeBSD 6.0 / ia64. */ + int check_SIG_ATOMIC: + SIG_ATOMIC_MIN == TYPE_MINIMUM (sig_atomic_t) + && SIG_ATOMIC_MAX == TYPE_MAXIMUM (sig_atomic_t) + ? 1 : -1; + int check_SIZE: SIZE_MAX == TYPE_MAXIMUM (size_t) ? 1 : -1; + int check_WCHAR: + WCHAR_MIN == TYPE_MINIMUM (wchar_t) + && WCHAR_MAX == TYPE_MAXIMUM (wchar_t) + ? 1 : -1; + /* Detect bug in mingw. */ + int check_WINT: + WINT_MIN == TYPE_MINIMUM (wint_t) + && WINT_MAX == TYPE_MAXIMUM (wint_t) + ? 1 : -1; /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others. */ int check_UINT8_C: @@ -202,6 +222,10 @@ struct s { fi AC_SUBST([HAVE_SYS_BITYPES_H]) + dnl Check for <wchar.h> (missing in Linux uClibc when built without wide + dnl character support). + AC_CHECK_HEADERS_ONCE([wchar.h]) + gl_STDINT_TYPE_PROPERTIES STDINT_H=stdint.h fi @@ -337,14 +361,16 @@ AC_DEFUN([gl_STDINT_INCLUDES], included before <wchar.h>. */ #include <stddef.h> #include <signal.h> - #include <stdio.h> - #include <time.h> - #include <wchar.h> + #if HAVE_WCHAR_H + # include <stdio.h> + # include <time.h> + # include <wchar.h> + #endif ]]) dnl gl_STDINT_TYPE_PROPERTIES dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t -dnl of interest to stdint_.h. +dnl of interest to stdint.in.h. AC_DEFUN([gl_STDINT_TYPE_PROPERTIES], [ gl_STDINT_BITSIZEOF([ptrdiff_t sig_atomic_t size_t wchar_t wint_t], |