+ AC_SUBST([HAVE_XLOCALE_H])
+
+ dnl <locale.h> is always overridden, because of GNULIB_POSIXCHECK.
+ gl_CHECK_NEXT_HEADERS([locale.h])
+
+ if test -n "$STDDEF_H" \
+ || test $gl_cv_header_locale_h_posix2001 = no \
+ || test $gl_cv_header_locale_h_needs_xlocale_h = yes; then
+ gl_REPLACE_LOCALE_H
+ 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([[#include <locale.h>
+/* Some systems provide declarations in a non-standard header. */
+#if HAVE_XLOCALE_H
+# include <xlocale.h>
+#endif
+ ]], [duplocale])
+])
+
+dnl Unconditionally enables the replacement of <locale.h>.
+AC_DEFUN([gl_REPLACE_LOCALE_H],
+[
+ dnl This is a no-op, because <locale.h> is always overridden.
+ :
+])
+
+AC_DEFUN([gl_LOCALE_MODULE_INDICATOR],
+[
+ dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+ AC_REQUIRE([gl_LOCALE_H_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])
+])
+
+AC_DEFUN([gl_LOCALE_H_DEFAULTS],
+[
+ GNULIB_DUPLOCALE=0; AC_SUBST([GNULIB_DUPLOCALE])
+ dnl Assume proper GNU behavior unless another module says otherwise.
+ HAVE_DUPLOCALE=1; AC_SUBST([HAVE_DUPLOCALE])
+ REPLACE_DUPLOCALE=0; AC_SUBST([REPLACE_DUPLOCALE])