| 1 | # iconv_h.m4 serial 15
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| 2 | dnl Copyright (C) 2007-2021 Free Software Foundation, Inc.
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| 3 | dnl This file is free software; the Free Software Foundation
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| 4 | dnl gives unlimited permission to copy and/or distribute it,
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| 5 | dnl with or without modifications, as long as this notice is preserved.
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| 6 |
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| 7 | AC_DEFUN_ONCE([gl_ICONV_H],
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| 8 | [
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| 9 | AC_REQUIRE([gl_ICONV_H_DEFAULTS])
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| 10 |
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| 11 | dnl Execute this unconditionally, because ICONV_H may be set by other
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| 12 | dnl modules, after this code is executed.
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| 13 | gl_CHECK_NEXT_HEADERS([iconv.h])
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| 14 |
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| 15 | dnl Check for declarations of anything we want to poison if the
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| 16 | dnl corresponding gnulib module is not in use, and which is not
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| 17 | dnl guaranteed by C89.
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| 18 | gl_WARN_ON_USE_PREPARE([[#include <iconv.h>
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| 19 | ]], [iconv iconv_open])
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| 20 |
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| 21 | AC_REQUIRE([AC_C_RESTRICT])
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| 22 | ])
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| 23 |
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| 24 | dnl Unconditionally enables the replacement of <iconv.h>.
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| 25 | AC_DEFUN([gl_REPLACE_ICONV_H],
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| 26 | [
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| 27 | gl_ICONV_H_REQUIRE_DEFAULTS
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| 28 | ICONV_H='iconv.h'
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| 29 | AM_CONDITIONAL([GL_GENERATE_ICONV_H], [test -n "$ICONV_H"])
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| 30 | ])
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| 31 |
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| 32 | # gl_ICONV_MODULE_INDICATOR([modulename])
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| 33 | # sets the shell variable that indicates the presence of the given module
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| 34 | # to a C preprocessor expression that will evaluate to 1.
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| 35 | # This macro invocation must not occur in macros that are AC_REQUIREd.
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| 36 | AC_DEFUN([gl_ICONV_MODULE_INDICATOR],
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| 37 | [
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| 38 | dnl Ensure to expand the default settings once only.
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| 39 | gl_ICONV_H_REQUIRE_DEFAULTS
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| 40 | gl_MODULE_INDICATOR_SET_VARIABLE([$1])
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| 41 | ])
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| 42 |
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| 43 | # Initializes the default values for AC_SUBSTed shell variables.
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| 44 | # This macro must not be AC_REQUIREd. It must only be invoked, and only
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| 45 | # outside of macros or in macros that are not AC_REQUIREd.
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| 46 | AC_DEFUN([gl_ICONV_H_REQUIRE_DEFAULTS],
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| 47 | [
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| 48 | m4_defun(GL_MODULE_INDICATOR_PREFIX[_ICONV_H_MODULE_INDICATOR_DEFAULTS], [
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| 49 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ICONV])
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| 50 | ])
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| 51 | m4_require(GL_MODULE_INDICATOR_PREFIX[_ICONV_H_MODULE_INDICATOR_DEFAULTS])
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| 52 | AC_REQUIRE([gl_ICONV_H_DEFAULTS])
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| 53 | ])
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| 54 |
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| 55 | AC_DEFUN([gl_ICONV_H_DEFAULTS],
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| 56 | [
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| 57 | m4_ifdef([gl_ANSI_CXX], [AC_REQUIRE([gl_ANSI_CXX])])
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| 58 | dnl Assume proper GNU behavior unless another module says otherwise.
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| 59 | ICONV_CONST=; AC_SUBST([ICONV_CONST])
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| 60 | REPLACE_ICONV=0; AC_SUBST([REPLACE_ICONV])
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| 61 | REPLACE_ICONV_OPEN=0; AC_SUBST([REPLACE_ICONV_OPEN])
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| 62 | REPLACE_ICONV_UTF=0; AC_SUBST([REPLACE_ICONV_UTF])
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| 63 | ICONV_H=''; AC_SUBST([ICONV_H])
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| 64 | m4_ifdef([gl_POSIXCHECK],
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| 65 | [ICONV_H='iconv.h'],
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| 66 | [if m4_ifdef([gl_ANSI_CXX], [test "$CXX" != no], [false]); then
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| 67 | dnl Override <fnmatch.h> always, to support the C++ GNULIB_NAMESPACE.
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| 68 | ICONV_H='iconv.h'
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| 69 | fi
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| 70 | ])
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| 71 | AM_CONDITIONAL([GL_GENERATE_ICONV_H], [test -n "$ICONV_H"])
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| 72 | ])
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