284 lines
9.3 KiB
Plaintext
284 lines
9.3 KiB
Plaintext
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# iconv.m4 serial 24
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dnl Copyright (C) 2000-2002, 2007-2014, 2016-2022 Free Software Foundation,
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dnl Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl From Bruno Haible.
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AC_PREREQ([2.64])
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dnl Note: AM_ICONV is documented in the GNU gettext manual
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dnl <https://www.gnu.org/software/gettext/manual/html_node/AM_005fICONV.html>.
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dnl Don't make changes that are incompatible with that documentation!
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AC_DEFUN([AM_ICONV_LINKFLAGS_BODY],
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[
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dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
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AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
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AC_REQUIRE([AC_LIB_RPATH])
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dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
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dnl accordingly.
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AC_LIB_LINKFLAGS_BODY([iconv])
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])
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AC_DEFUN([AM_ICONV_LINK],
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[
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dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
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dnl those with the standalone portable GNU libiconv installed).
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
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dnl accordingly.
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AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
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dnl Add $INCICONV to CPPFLAGS before performing the following checks,
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dnl because if the user has installed libiconv and not disabled its use
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dnl via --without-libiconv-prefix, he wants to use it. The first
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dnl AC_LINK_IFELSE will then fail, the second AC_LINK_IFELSE will succeed.
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am_save_CPPFLAGS="$CPPFLAGS"
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AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
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AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [
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am_cv_func_iconv="no, consider installing GNU libiconv"
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am_cv_lib_iconv=no
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[[
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#include <stdlib.h>
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#include <iconv.h>
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]],
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[[iconv_t cd = iconv_open("","");
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iconv(cd,NULL,NULL,NULL,NULL);
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iconv_close(cd);]])],
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[am_cv_func_iconv=yes])
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if test "$am_cv_func_iconv" != yes; then
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am_save_LIBS="$LIBS"
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LIBS="$LIBS $LIBICONV"
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[[
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#include <stdlib.h>
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#include <iconv.h>
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]],
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[[iconv_t cd = iconv_open("","");
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iconv(cd,NULL,NULL,NULL,NULL);
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iconv_close(cd);]])],
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[am_cv_lib_iconv=yes]
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[am_cv_func_iconv=yes])
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LIBS="$am_save_LIBS"
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fi
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])
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if test "$am_cv_func_iconv" = yes; then
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AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [
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dnl This tests against bugs in AIX 5.1, AIX 6.1..7.1, HP-UX 11.11,
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dnl Solaris 10.
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am_save_LIBS="$LIBS"
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if test $am_cv_lib_iconv = yes; then
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LIBS="$LIBS $LIBICONV"
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fi
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am_cv_func_iconv_works=no
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for ac_iconv_const in '' 'const'; do
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AC_RUN_IFELSE(
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[AC_LANG_PROGRAM(
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[[
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#include <iconv.h>
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#include <string.h>
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#ifndef ICONV_CONST
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# define ICONV_CONST $ac_iconv_const
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#endif
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]],
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[[int result = 0;
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/* Test against AIX 5.1...7.2 bug: Failures are not distinguishable from
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successful returns. This is even documented in
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<https://www.ibm.com/support/knowledgecenter/ssw_aix_72/i_bostechref/iconv.html> */
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{
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iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
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if (cd_utf8_to_88591 != (iconv_t)(-1))
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{
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static ICONV_CONST char input[] = "\342\202\254"; /* EURO SIGN */
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char buf[10];
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ICONV_CONST char *inptr = input;
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size_t inbytesleft = strlen (input);
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char *outptr = buf;
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size_t outbytesleft = sizeof (buf);
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size_t res = iconv (cd_utf8_to_88591,
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&inptr, &inbytesleft,
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&outptr, &outbytesleft);
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if (res == 0)
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result |= 1;
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iconv_close (cd_utf8_to_88591);
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}
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}
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/* Test against Solaris 10 bug: Failures are not distinguishable from
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successful returns. */
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{
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iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646");
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if (cd_ascii_to_88591 != (iconv_t)(-1))
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{
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static ICONV_CONST char input[] = "\263";
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char buf[10];
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ICONV_CONST char *inptr = input;
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size_t inbytesleft = strlen (input);
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char *outptr = buf;
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size_t outbytesleft = sizeof (buf);
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size_t res = iconv (cd_ascii_to_88591,
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&inptr, &inbytesleft,
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&outptr, &outbytesleft);
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if (res == 0)
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result |= 2;
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iconv_close (cd_ascii_to_88591);
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}
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}
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/* Test against AIX 6.1..7.1 bug: Buffer overrun. */
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{
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iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1");
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if (cd_88591_to_utf8 != (iconv_t)(-1))
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{
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static ICONV_CONST char input[] = "\304";
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static char buf[2] = { (char)0xDE, (char)0xAD };
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ICONV_CONST char *inptr = input;
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size_t inbytesleft = 1;
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char *outptr = buf;
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size_t outbytesleft = 1;
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size_t res = iconv (cd_88591_to_utf8,
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&inptr, &inbytesleft,
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&outptr, &outbytesleft);
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if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD)
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result |= 4;
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iconv_close (cd_88591_to_utf8);
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}
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}
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#if 0 /* This bug could be worked around by the caller. */
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/* Test against HP-UX 11.11 bug: Positive return value instead of 0. */
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{
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iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
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if (cd_88591_to_utf8 != (iconv_t)(-1))
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{
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static ICONV_CONST char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
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char buf[50];
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ICONV_CONST char *inptr = input;
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size_t inbytesleft = strlen (input);
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char *outptr = buf;
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size_t outbytesleft = sizeof (buf);
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size_t res = iconv (cd_88591_to_utf8,
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&inptr, &inbytesleft,
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&outptr, &outbytesleft);
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if ((int)res > 0)
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result |= 8;
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iconv_close (cd_88591_to_utf8);
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}
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}
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#endif
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/* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
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provided. */
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{
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/* Try standardized names. */
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iconv_t cd1 = iconv_open ("UTF-8", "EUC-JP");
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/* Try IRIX, OSF/1 names. */
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iconv_t cd2 = iconv_open ("UTF-8", "eucJP");
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/* Try AIX names. */
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iconv_t cd3 = iconv_open ("UTF-8", "IBM-eucJP");
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/* Try HP-UX names. */
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iconv_t cd4 = iconv_open ("utf8", "eucJP");
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if (cd1 == (iconv_t)(-1) && cd2 == (iconv_t)(-1)
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&& cd3 == (iconv_t)(-1) && cd4 == (iconv_t)(-1))
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result |= 16;
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if (cd1 != (iconv_t)(-1))
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iconv_close (cd1);
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if (cd2 != (iconv_t)(-1))
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iconv_close (cd2);
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if (cd3 != (iconv_t)(-1))
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iconv_close (cd3);
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if (cd4 != (iconv_t)(-1))
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iconv_close (cd4);
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}
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return result;
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]])],
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[am_cv_func_iconv_works=yes], ,
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[case "$host_os" in
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aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
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*) am_cv_func_iconv_works="guessing yes" ;;
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esac])
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test "$am_cv_func_iconv_works" = no || break
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done
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LIBS="$am_save_LIBS"
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])
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case "$am_cv_func_iconv_works" in
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*no) am_func_iconv=no am_cv_lib_iconv=no ;;
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*) am_func_iconv=yes ;;
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esac
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else
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am_func_iconv=no am_cv_lib_iconv=no
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fi
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if test "$am_func_iconv" = yes; then
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AC_DEFINE([HAVE_ICONV], [1],
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[Define if you have the iconv() function and it works.])
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fi
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if test "$am_cv_lib_iconv" = yes; then
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AC_MSG_CHECKING([how to link with libiconv])
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AC_MSG_RESULT([$LIBICONV])
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else
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dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
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dnl either.
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CPPFLAGS="$am_save_CPPFLAGS"
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LIBICONV=
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LTLIBICONV=
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fi
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AC_SUBST([LIBICONV])
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AC_SUBST([LTLIBICONV])
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])
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dnl Define AM_ICONV using AC_DEFUN_ONCE, in order to avoid warnings like
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dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required".
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dnl This is tricky because of the way 'aclocal' is implemented:
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dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN.
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dnl Otherwise aclocal's initial scan pass would miss the macro definition.
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dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions.
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dnl Otherwise aclocal would emit many "Use of uninitialized value $1"
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dnl warnings.
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AC_DEFUN_ONCE([AM_ICONV],
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[
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AM_ICONV_LINK
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if test "$am_cv_func_iconv" = yes; then
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AC_CACHE_CHECK([whether iconv is compatible with its POSIX signature],
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[gl_cv_iconv_nonconst],
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[AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[[
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#include <stdlib.h>
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#include <iconv.h>
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extern
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#ifdef __cplusplus
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"C"
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#endif
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size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
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]],
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[[]])],
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[gl_cv_iconv_nonconst=yes],
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[gl_cv_iconv_nonconst=no])
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])
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else
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dnl When compiling GNU libiconv on a system that does not have iconv yet,
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dnl pick the POSIX compliant declaration without 'const'.
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gl_cv_iconv_nonconst=yes
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fi
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if test $gl_cv_iconv_nonconst = yes; then
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iconv_arg1=""
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else
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iconv_arg1="const"
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fi
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AC_DEFINE_UNQUOTED([ICONV_CONST], [$iconv_arg1],
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[Define as const if the declaration of iconv() needs const.])
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dnl Also substitute ICONV_CONST in the gnulib generated <iconv.h>.
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m4_ifdef([gl_ICONV_H_DEFAULTS],
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[AC_REQUIRE([gl_ICONV_H_DEFAULTS])
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if test $gl_cv_iconv_nonconst != yes; then
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ICONV_CONST="const"
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fi
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])
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])
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