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-rw-r--r--m4/langinfo_h.m425
1 files changed, 20 insertions, 5 deletions
diff --git a/m4/langinfo_h.m4 b/m4/langinfo_h.m4
index 950fe20af..87959f77a 100644
--- a/m4/langinfo_h.m4
+++ b/m4/langinfo_h.m4
@@ -1,10 +1,10 @@
-# langinfo_h.m4 serial 9
+# langinfo_h.m4 serial 12
dnl Copyright (C) 2009-2021 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.
-AC_DEFUN([gl_LANGINFO_H],
+AC_DEFUN_ONCE([gl_LANGINFO_H],
[
AC_REQUIRE([gl_LANGINFO_H_DEFAULTS])
@@ -104,18 +104,33 @@ int a = YESEXPR;
]], [nl_langinfo])
])
+# gl_LANGINFO_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_LANGINFO_MODULE_INDICATOR],
[
- dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
- AC_REQUIRE([gl_LANGINFO_H_DEFAULTS])
+ dnl Ensure to expand the default settings once only.
+ gl_LANGINFO_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_LANGINFO_H_REQUIRE_DEFAULTS],
+[
+ m4_defun(GL_MODULE_INDICATOR_PREFIX[_LANGINFO_H_MODULE_INDICATOR_DEFAULTS], [
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_NL_LANGINFO])
+ ])
+ m4_require(GL_MODULE_INDICATOR_PREFIX[_LANGINFO_H_MODULE_INDICATOR_DEFAULTS])
+ AC_REQUIRE([gl_LANGINFO_H_DEFAULTS])
+])
+
AC_DEFUN([gl_LANGINFO_H_DEFAULTS],
[
- GNULIB_NL_LANGINFO=0; AC_SUBST([GNULIB_NL_LANGINFO])
dnl Assume proper GNU behavior unless another module says otherwise.
HAVE_NL_LANGINFO=1; AC_SUBST([HAVE_NL_LANGINFO])
REPLACE_NL_LANGINFO=0; AC_SUBST([REPLACE_NL_LANGINFO])