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# wctype_h.m4 serial 30
dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it.
dnl Copyright (C) 2006-2023 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.
dnl Written by Paul Eggert.
AC_DEFUN_ONCE([gl_WCTYPE_H],
[
AC_REQUIRE([gl_WCTYPE_H_DEFAULTS])
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_CANONICAL_HOST])
AC_CHECK_FUNCS_ONCE([iswcntrl])
if test $ac_cv_func_iswcntrl = yes; then
HAVE_ISWCNTRL=1
else
HAVE_ISWCNTRL=0
fi
AC_SUBST([HAVE_ISWCNTRL])
AC_REQUIRE([gt_TYPE_WINT_T])
if test $gt_cv_c_wint_t = yes; then
HAVE_WINT_T=1
else
HAVE_WINT_T=0
fi
AC_SUBST([HAVE_WINT_T])
AC_REQUIRE([gl_TYPE_WINT_T_PREREQ])
gl_CHECK_NEXT_HEADERS([wctype.h])
if test $ac_cv_header_wctype_h = yes; then
if test $ac_cv_func_iswcntrl = yes; then
dnl Linux libc5 has an iswprint function that returns 0 for all arguments.
dnl The other functions are likely broken in the same way.
AC_CACHE_CHECK([whether iswcntrl works], [gl_cv_func_iswcntrl_works],
[
AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <wchar.h>
#include <wctype.h>
int main () { return iswprint ('x') == 0; }
]])],
[gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no],
[dnl Guess no on Linux libc5, yes otherwise.
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h>
#if __GNU_LIBRARY__ == 1
Linux libc5 i18n is broken.
#endif]], [[]])],
[gl_cv_func_iswcntrl_works="guessing yes"],
[gl_cv_func_iswcntrl_works="guessing no"])
])
])
fi
HAVE_WCTYPE_H=1
else
HAVE_WCTYPE_H=0
fi
AC_SUBST([HAVE_WCTYPE_H])
if test $GNULIBHEADERS_OVERRIDE_WINT_T = 1; then
REPLACE_ISWCNTRL=1
else
case "$gl_cv_func_iswcntrl_works" in
*yes) REPLACE_ISWCNTRL=0 ;;
*) REPLACE_ISWCNTRL=1 ;;
esac
fi
AC_SUBST([REPLACE_ISWCNTRL])
if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
dnl Redefine all of iswcntrl, ..., iswxdigit in <wctype.h>.
:
fi
if test $REPLACE_ISWCNTRL = 1; then
REPLACE_TOWLOWER=1
else
AC_CHECK_FUNCS([towlower])
if test $ac_cv_func_towlower = yes; then
REPLACE_TOWLOWER=0
else
AC_CHECK_DECLS([towlower],,,
[[#include <wchar.h>
#if HAVE_WCTYPE_H
# include <wctype.h>
#endif
]])
if test $ac_cv_have_decl_towlower = yes; then
dnl On Minix 3.1.8, the system's <wctype.h> declares towlower() and
dnl towupper() although it does not have the functions. Avoid a
dnl collision with gnulib's replacement.
REPLACE_TOWLOWER=1
else
REPLACE_TOWLOWER=0
fi
fi
fi
AC_SUBST([REPLACE_TOWLOWER])
if test $HAVE_ISWCNTRL = 0 || test $REPLACE_TOWLOWER = 1; then
dnl Redefine towlower, towupper in <wctype.h>.
:
fi
dnl We assume that the wctype() and iswctype() functions exist if and only
dnl if the type wctype_t is defined in <wchar.h> or in <wctype.h> if that
dnl exists.
dnl HP-UX 11.00 declares all these in <wchar.h> and lacks <wctype.h>.
AC_CACHE_CHECK([for wctype_t], [gl_cv_type_wctype_t],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[#include <wchar.h>
#if HAVE_WCTYPE_H
# include <wctype.h>
#endif
wctype_t a;
]],
[[]])],
[gl_cv_type_wctype_t=yes],
[gl_cv_type_wctype_t=no])
])
if test $gl_cv_type_wctype_t = no; then
HAVE_WCTYPE_T=0
fi
dnl We assume that the wctrans() and towctrans() functions exist if and only
dnl if the type wctrans_t is defined in <wctype.h>.
AC_CACHE_CHECK([for wctrans_t], [gl_cv_type_wctrans_t],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[#include <wchar.h>
#include <wctype.h>
wctrans_t a;
]],
[[]])],
[gl_cv_type_wctrans_t=yes],
[gl_cv_type_wctrans_t=no])
])
if test $gl_cv_type_wctrans_t = no; then
HAVE_WCTRANS_T=0
fi
dnl Check for declarations of anything we want to poison if the
dnl corresponding gnulib module is not in use.
gl_WARN_ON_USE_PREPARE([[
#if !(defined __GLIBC__ && !defined __UCLIBC__)
# include <wchar.h>
#endif
#include <wctype.h>
]],
[wctype iswctype wctrans towctrans
])
])
# gl_WCTYPE_MODULE_INDICATOR([modulename])
# sets the shell variable that indicates the presence of the given module
# to a C preprocessor expression that will evaluate to 1.
# This macro invocation must not occur in macros that are AC_REQUIREd.
AC_DEFUN([gl_WCTYPE_MODULE_INDICATOR],
[
dnl Ensure to expand the default settings once only.
gl_WCTYPE_H_REQUIRE_DEFAULTS
gl_MODULE_INDICATOR_SET_VARIABLE([$1])
dnl Define it also as a C macro, for the benefit of the unit tests.
gl_MODULE_INDICATOR_FOR_TESTS([$1])
])
# Initializes the default values for AC_SUBSTed shell variables.
# This macro must not be AC_REQUIREd. It must only be invoked, and only
# outside of macros or in macros that are not AC_REQUIREd.
AC_DEFUN([gl_WCTYPE_H_REQUIRE_DEFAULTS],
[
m4_defun(GL_MODULE_INDICATOR_PREFIX[_WCTYPE_H_MODULE_INDICATOR_DEFAULTS], [
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISWBLANK])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISWDIGIT])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISWXDIGIT])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCTYPE])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISWCTYPE])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCTRANS])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TOWCTRANS])
])
m4_require(GL_MODULE_INDICATOR_PREFIX[_WCTYPE_H_MODULE_INDICATOR_DEFAULTS])
AC_REQUIRE([gl_WCTYPE_H_DEFAULTS])
])
AC_DEFUN([gl_WCTYPE_H_DEFAULTS],
[
dnl Assume proper GNU behavior unless another module says otherwise.
HAVE_ISWBLANK=1; AC_SUBST([HAVE_ISWBLANK])
HAVE_WCTYPE_T=1; AC_SUBST([HAVE_WCTYPE_T])
HAVE_WCTRANS_T=1; AC_SUBST([HAVE_WCTRANS_T])
REPLACE_ISWBLANK=0; AC_SUBST([REPLACE_ISWBLANK])
REPLACE_ISWDIGIT=0; AC_SUBST([REPLACE_ISWDIGIT])
REPLACE_ISWXDIGIT=0; AC_SUBST([REPLACE_ISWXDIGIT])
])
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