-# iconv.m4 serial 22
+# iconv.m4 serial 23
dnl Copyright (C) 2000-2002, 2007-2014, 2016-2020 Free Software Foundation,
dnl Inc.
dnl This file is free software; the Free Software Foundation
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.
[
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
])