| # 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_ONCE([gl_ICONV_H], |
| [ |
| AC_REQUIRE([gl_ICONV_H_DEFAULTS]) |
| |
| dnl Execute this unconditionally, because ICONV_H may be set by other |
| dnl modules, after this code is executed. |
| gl_CHECK_NEXT_HEADERS([iconv.h]) |
| |
| dnl Check for declarations of anything we want to poison if the |
| dnl corresponding gnulib module is not in use, and which is not |
| dnl guaranteed by C89. |
| gl_WARN_ON_USE_PREPARE([[#include <iconv.h> |
| ]], [iconv iconv_open]) |
| |
| AC_REQUIRE([AC_C_RESTRICT]) |
| ]) |
| |
| dnl Unconditionally enables the replacement of <iconv.h>. |
| AC_DEFUN([gl_REPLACE_ICONV_H], |
| [ |
| 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 Ensure to expand the default settings once only. |
| gl_ICONV_H_REQUIRE_DEFAULTS |
| gl_MODULE_INDICATOR_SET_VARIABLE([$1]) |
| ]) |
| |
| # Initializes the default values for AC_SUBSTed shell variables. |
| # This macro must not be AC_REQUIREd. It must only be invoked, and only |
| # outside of macros or in macros that are not AC_REQUIREd. |
| AC_DEFUN([gl_ICONV_H_REQUIRE_DEFAULTS], |
| [ |
| m4_defun(GL_MODULE_INDICATOR_PREFIX[_ICONV_H_MODULE_INDICATOR_DEFAULTS], [ |
| gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ICONV]) |
| ]) |
| m4_require(GL_MODULE_INDICATOR_PREFIX[_ICONV_H_MODULE_INDICATOR_DEFAULTS]) |
| AC_REQUIRE([gl_ICONV_H_DEFAULTS]) |
| ]) |
| |
| AC_DEFUN([gl_ICONV_H_DEFAULTS], |
| [ |
| m4_ifdef([gl_ANSI_CXX], [AC_REQUIRE([gl_ANSI_CXX])]) |
| dnl Assume proper GNU behavior unless another module says otherwise. |
| ICONV_CONST=; AC_SUBST([ICONV_CONST]) |
| REPLACE_ICONV=0; AC_SUBST([REPLACE_ICONV]) |
| REPLACE_ICONV_OPEN=0; AC_SUBST([REPLACE_ICONV_OPEN]) |
| REPLACE_ICONV_UTF=0; AC_SUBST([REPLACE_ICONV_UTF]) |
| ICONV_H=''; AC_SUBST([ICONV_H]) |
| m4_ifdef([gl_POSIXCHECK], |
| [ICONV_H='iconv.h'], |
| [if m4_ifdef([gl_ANSI_CXX], [test "$CXX" != no], [false]); then |
| dnl Override <fnmatch.h> always, to support the C++ GNULIB_NAMESPACE. |
| ICONV_H='iconv.h' |
| fi |
| ]) |
| AM_CONDITIONAL([GL_GENERATE_ICONV_H], [test -n "$ICONV_H"]) |
| ]) |