[deliverable/binutils-gdb.git] / gnulib / import / m4 / mode_t.m4

# mode_t.m4 serial 2
dnl Copyright (C) 2009-2019 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.

# For using mode_t, it's sufficient to use AC_TYPE_MODE_T and
# include <sys/types.h>.

# Define PROMOTED_MODE_T to the type that is the result of "default argument
# promotion" (ISO C 6.5.2.2.(6)) of the type mode_t.
AC_DEFUN([gl_PROMOTED_TYPE_MODE_T],
[
  AC_REQUIRE([AC_TYPE_MODE_T])
  AC_CACHE_CHECK([for promoted mode_t type], [gl_cv_promoted_mode_t], [
    dnl Assume mode_t promotes to 'int' if and only if it is smaller than 'int',
    dnl and to itself otherwise. This assumption is not guaranteed by the ISO C
    dnl standard, but we don't know of any real-world counterexamples.
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>]],
      [[typedef int array[2 * (sizeof (mode_t) < sizeof (int)) - 1];]])],
      [gl_cv_promoted_mode_t='int'],
      [gl_cv_promoted_mode_t='mode_t'])
  ])
  AC_DEFINE_UNQUOTED([PROMOTED_MODE_T], [$gl_cv_promoted_mode_t],
    [Define to the type that is the result of default argument promotions of type mode_t.])
])
Commit	Line	Data
6ec2e0f5	1	# mode_t.m4 serial 2
c0c3707f	2	dnl Copyright (C) 2009-2019 Free Software Foundation, Inc.
6ec2e0f5 SDJ	3	dnl This file is free software; the Free Software Foundation
	4	dnl gives unlimited permission to copy and/or distribute it,
	5	dnl with or without modifications, as long as this notice is preserved.
	6
	7	# For using mode_t, it's sufficient to use AC_TYPE_MODE_T and
	8	# include <sys/types.h>.
	9
	10	# Define PROMOTED_MODE_T to the type that is the result of "default argument
	11	# promotion" (ISO C 6.5.2.2.(6)) of the type mode_t.
	12	AC_DEFUN([gl_PROMOTED_TYPE_MODE_T],
	13	[
	14	AC_REQUIRE([AC_TYPE_MODE_T])
	15	AC_CACHE_CHECK([for promoted mode_t type], [gl_cv_promoted_mode_t], [
	16	dnl Assume mode_t promotes to 'int' if and only if it is smaller than 'int',
	17	dnl and to itself otherwise. This assumption is not guaranteed by the ISO C
	18	dnl standard, but we don't know of any real-world counterexamples.
	19	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>]],
	20	[[typedef int array[2 * (sizeof (mode_t) < sizeof (int)) - 1];]])],
	21	[gl_cv_promoted_mode_t='int'],
	22	[gl_cv_promoted_mode_t='mode_t'])
	23	])
	24	AC_DEFINE_UNQUOTED([PROMOTED_MODE_T], [$gl_cv_promoted_mode_t],
	25	[Define to the type that is the result of default argument promotions of type mode_t.])
	26	])