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dnl Copyright (C) 2003, 2007-2023 Free Software Foundation, Inc. |
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dnl This file is free software; the Free Software Foundation |
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dnl gives unlimited permission to copy and/or distribute it, |
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dnl with or without modifications, as long as this notice is preserved. |
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dnl From Bruno Haible. |
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dnl Test whether <wchar.h> has the 'wint_t' type and whether gnulib's |
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dnl <wchar.h> or <wctype.h> would, if present, override 'wint_t'. |
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dnl Prerequisite: AC_PROG_CC |
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AC_DEFUN([gt_TYPE_WINT_T], |
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[ |
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AC_CACHE_CHECK([for wint_t], [gt_cv_c_wint_t], |
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[AC_COMPILE_IFELSE( |
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[AC_LANG_PROGRAM( |
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[[#include <wchar.h> |
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wint_t foo = (wchar_t)'\0';]], |
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[[]])], |
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[gt_cv_c_wint_t=yes], |
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[gt_cv_c_wint_t=no])]) |
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if test $gt_cv_c_wint_t = yes; then |
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AC_DEFINE([HAVE_WINT_T], [1], [Define if you have the 'wint_t' type.]) |
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dnl Determine whether gnulib's <wchar.h> or <wctype.h> would, if present, |
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dnl override 'wint_t'. |
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AC_CACHE_CHECK([whether wint_t is large enough], |
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[gl_cv_type_wint_t_large_enough], |
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[AC_COMPILE_IFELSE( |
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[AC_LANG_PROGRAM( |
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[[#include <wchar.h> |
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int verify[sizeof (wint_t) < sizeof (int) ? -1 : 1]; |
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]])], |
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[gl_cv_type_wint_t_large_enough=yes], |
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[gl_cv_type_wint_t_large_enough=no])]) |
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if test $gl_cv_type_wint_t_large_enough = no; then |
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GNULIBHEADERS_OVERRIDE_WINT_T=1 |
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else |
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GNULIBHEADERS_OVERRIDE_WINT_T=0 |
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fi |
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else |
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GNULIBHEADERS_OVERRIDE_WINT_T=0 |
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fi |
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AC_SUBST([GNULIBHEADERS_OVERRIDE_WINT_T]) |
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]) |
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dnl Prerequisites of the 'wint_t' override. |
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AC_DEFUN([gl_TYPE_WINT_T_PREREQ], |
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[ |
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AC_CHECK_HEADERS_ONCE([crtdefs.h]) |
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if test $ac_cv_header_crtdefs_h = yes; then |
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HAVE_CRTDEFS_H=1 |
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else |
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HAVE_CRTDEFS_H=0 |
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fi |
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AC_SUBST([HAVE_CRTDEFS_H]) |
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]) |
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