diff options
Diffstat (limited to 'm4/iconv_h.m4')
| -rw-r--r-- | m4/iconv_h.m4 | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/m4/iconv_h.m4 b/m4/iconv_h.m4 index ab8e2837a..294098829 100644 --- a/m4/iconv_h.m4 +++ b/m4/iconv_h.m4 @@ -1,10 +1,10 @@ -# iconv_h.m4 serial 12 +# iconv_h.m4 serial 15 dnl Copyright (C) 2007-2021 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_ICONV_H], +AC_DEFUN_ONCE([gl_ICONV_H], [ AC_REQUIRE([gl_ICONV_H_DEFAULTS]) @@ -24,22 +24,37 @@ AC_DEFUN([gl_ICONV_H], dnl Unconditionally enables the replacement of <iconv.h>. AC_DEFUN([gl_REPLACE_ICONV_H], [ - AC_REQUIRE([gl_ICONV_H_DEFAULTS]) + gl_ICONV_H_REQUIRE_DEFAULTS ICONV_H='iconv.h' AM_CONDITIONAL([GL_GENERATE_ICONV_H], [test -n "$ICONV_H"]) ]) +# gl_ICONV_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_ICONV_MODULE_INDICATOR], [ - dnl Use AC_REQUIRE here, so that the default settings are expanded once only. - AC_REQUIRE([gl_ICONV_H_DEFAULTS]) + dnl Ensure to expand the default settings once only. + gl_ICONV_H_REQUIRE_DEFAULTS gl_MODULE_INDICATOR_SET_VARIABLE([$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_ICONV_H_REQUIRE_DEFAULTS], +[ + m4_defun(GL_MODULE_INDICATOR_PREFIX[_ICONV_H_MODULE_INDICATOR_DEFAULTS], [ + gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ICONV]) + ]) + m4_require(GL_MODULE_INDICATOR_PREFIX[_ICONV_H_MODULE_INDICATOR_DEFAULTS]) + AC_REQUIRE([gl_ICONV_H_DEFAULTS]) +]) + AC_DEFUN([gl_ICONV_H_DEFAULTS], [ m4_ifdef([gl_ANSI_CXX], [AC_REQUIRE([gl_ANSI_CXX])]) - GNULIB_ICONV=0; AC_SUBST([GNULIB_ICONV]) dnl Assume proper GNU behavior unless another module says otherwise. ICONV_CONST=; AC_SUBST([ICONV_CONST]) REPLACE_ICONV=0; AC_SUBST([REPLACE_ICONV]) |