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Diffstat (limited to 'gnulib-m4/iconv.m4')
-rw-r--r--gnulib-m4/iconv.m467
1 files changed, 31 insertions, 36 deletions
diff --git a/gnulib-m4/iconv.m4 b/gnulib-m4/iconv.m4
index 877d8822..00057953 100644
--- a/gnulib-m4/iconv.m4
+++ b/gnulib-m4/iconv.m4
@@ -1,5 +1,5 @@
-# iconv.m4 serial 21
-dnl Copyright (C) 2000-2002, 2007-2014, 2016-2018 Free Software Foundation,
+# iconv.m4 serial 24
+dnl Copyright (C) 2000-2002, 2007-2014, 2016-2022 Free Software Foundation,
dnl Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -7,6 +7,12 @@ dnl with or without modifications, as long as this notice is preserved.
dnl From Bruno Haible.
+AC_PREREQ([2.64])
+
+dnl Note: AM_ICONV is documented in the GNU gettext manual
+dnl <https://www.gnu.org/software/gettext/manual/html_node/AM_005fICONV.html>.
+dnl Don't make changes that are incompatible with that documentation!
+
AC_DEFUN([AM_ICONV_LINKFLAGS_BODY],
[
dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
@@ -86,8 +92,9 @@ AC_DEFUN([AM_ICONV_LINK],
#endif
]],
[[int result = 0;
- /* Test against AIX 5.1 bug: Failures are not distinguishable from successful
- returns. */
+ /* Test against AIX 5.1...7.2 bug: Failures are not distinguishable from
+ successful returns. This is even documented in
+ <https://www.ibm.com/support/knowledgecenter/ssw_aix_72/i_bostechref/iconv.html> */
{
iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
if (cd_utf8_to_88591 != (iconv_t)(-1))
@@ -225,8 +232,7 @@ AC_DEFUN([AM_ICONV_LINK],
AC_SUBST([LTLIBICONV])
])
-dnl Define AM_ICONV using AC_DEFUN_ONCE for Autoconf >= 2.64, in order to
-dnl avoid warnings like
+dnl Define AM_ICONV using AC_DEFUN_ONCE, in order to avoid warnings like
dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required".
dnl This is tricky because of the way 'aclocal' is implemented:
dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN.
@@ -234,54 +240,43 @@ dnl Otherwise aclocal's initial scan pass would miss the macro definition.
dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions.
dnl Otherwise aclocal would emit many "Use of uninitialized value $1"
dnl warnings.
-m4_define([gl_iconv_AC_DEFUN],
- m4_version_prereq([2.64],
- [[AC_DEFUN_ONCE(
- [$1], [$2])]],
- [m4_ifdef([gl_00GNULIB],
- [[AC_DEFUN_ONCE(
- [$1], [$2])]],
- [[AC_DEFUN(
- [$1], [$2])]])]))
-gl_iconv_AC_DEFUN([AM_ICONV],
+AC_DEFUN_ONCE([AM_ICONV],
[
AM_ICONV_LINK
if test "$am_cv_func_iconv" = yes; then
- AC_MSG_CHECKING([for iconv declaration])
- AC_CACHE_VAL([am_cv_proto_iconv], [
- AC_COMPILE_IFELSE(
- [AC_LANG_PROGRAM(
- [[
+ AC_CACHE_CHECK([whether iconv is compatible with its POSIX signature],
+ [gl_cv_iconv_nonconst],
+ [AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[
#include <stdlib.h>
#include <iconv.h>
extern
#ifdef __cplusplus
"C"
#endif
-#if defined(__STDC__) || defined(_MSC_VER) || defined(__cplusplus)
size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
-#else
-size_t iconv();
-#endif
- ]],
- [[]])],
- [am_cv_proto_iconv_arg1=""],
- [am_cv_proto_iconv_arg1="const"])
- am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
- am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
- AC_MSG_RESULT([
- $am_cv_proto_iconv])
+ ]],
+ [[]])],
+ [gl_cv_iconv_nonconst=yes],
+ [gl_cv_iconv_nonconst=no])
+ ])
else
dnl When compiling GNU libiconv on a system that does not have iconv yet,
dnl pick the POSIX compliant declaration without 'const'.
- am_cv_proto_iconv_arg1=""
+ gl_cv_iconv_nonconst=yes
+ fi
+ if test $gl_cv_iconv_nonconst = yes; then
+ iconv_arg1=""
+ else
+ iconv_arg1="const"
fi
- AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1],
+ AC_DEFINE_UNQUOTED([ICONV_CONST], [$iconv_arg1],
[Define as const if the declaration of iconv() needs const.])
dnl Also substitute ICONV_CONST in the gnulib generated <iconv.h>.
m4_ifdef([gl_ICONV_H_DEFAULTS],
[AC_REQUIRE([gl_ICONV_H_DEFAULTS])
- if test -n "$am_cv_proto_iconv_arg1"; then
+ if test $gl_cv_iconv_nonconst != yes; then
ICONV_CONST="const"
fi
])