| # iconv.m4 serial 26 |
| dnl Copyright (C) 2000-2002, 2007-2014, 2016-2023 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, |
| 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. |
| AC_REQUIRE([AC_LIB_PREPARE_PREFIX]) |
| AC_REQUIRE([AC_LIB_RPATH]) |
| |
| dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV |
| dnl accordingly. |
| AC_LIB_LINKFLAGS_BODY([iconv]) |
| ]) |
| |
| AC_DEFUN([AM_ICONV_LINK], |
| [ |
| dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and |
| dnl those with the standalone portable GNU libiconv installed). |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| |
| dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV |
| dnl accordingly. |
| AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY]) |
| |
| dnl Add $INCICONV to CPPFLAGS before performing the following checks, |
| dnl because if the user has installed libiconv and not disabled its use |
| dnl via --without-libiconv-prefix, he wants to use it. The first |
| dnl AC_LINK_IFELSE will then fail, the second AC_LINK_IFELSE will succeed. |
| am_save_CPPFLAGS="$CPPFLAGS" |
| AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV]) |
| |
| AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [ |
| am_cv_func_iconv="no, consider installing GNU libiconv" |
| am_cv_lib_iconv=no |
| AC_LINK_IFELSE( |
| [AC_LANG_PROGRAM( |
| [[ |
| #include <stdlib.h> |
| #include <iconv.h> |
| ]], |
| [[iconv_t cd = iconv_open("",""); |
| iconv(cd,NULL,NULL,NULL,NULL); |
| iconv_close(cd);]])], |
| [am_cv_func_iconv=yes]) |
| if test "$am_cv_func_iconv" != yes; then |
| am_save_LIBS="$LIBS" |
| LIBS="$LIBS $LIBICONV" |
| AC_LINK_IFELSE( |
| [AC_LANG_PROGRAM( |
| [[ |
| #include <stdlib.h> |
| #include <iconv.h> |
| ]], |
| [[iconv_t cd = iconv_open("",""); |
| iconv(cd,NULL,NULL,NULL,NULL); |
| iconv_close(cd);]])], |
| [am_cv_lib_iconv=yes] |
| [am_cv_func_iconv=yes]) |
| LIBS="$am_save_LIBS" |
| fi |
| ]) |
| if test "$am_cv_func_iconv" = yes; then |
| AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [ |
| dnl This tests against bugs in AIX 5.1, AIX 6.1..7.1, HP-UX 11.11, |
| dnl Solaris 10. |
| am_save_LIBS="$LIBS" |
| if test $am_cv_lib_iconv = yes; then |
| LIBS="$LIBS $LIBICONV" |
| fi |
| am_cv_func_iconv_works=no |
| for ac_iconv_const in '' 'const'; do |
| AC_RUN_IFELSE( |
| [AC_LANG_PROGRAM( |
| [[ |
| #include <iconv.h> |
| #include <string.h> |
| |
| #ifndef ICONV_CONST |
| # define ICONV_CONST $ac_iconv_const |
| #endif |
| ]], |
| [[int result = 0; |
| /* 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)) |
| { |
| static ICONV_CONST char input[] = "\342\202\254"; /* EURO SIGN */ |
| char buf[10]; |
| ICONV_CONST char *inptr = input; |
| size_t inbytesleft = strlen (input); |
| char *outptr = buf; |
| size_t outbytesleft = sizeof (buf); |
| size_t res = iconv (cd_utf8_to_88591, |
| &inptr, &inbytesleft, |
| &outptr, &outbytesleft); |
| if (res == 0) |
| result |= 1; |
| iconv_close (cd_utf8_to_88591); |
| } |
| } |
| /* Test against Solaris 10 bug: Failures are not distinguishable from |
| successful returns. */ |
| { |
| iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646"); |
| if (cd_ascii_to_88591 != (iconv_t)(-1)) |
| { |
| static ICONV_CONST char input[] = "\263"; |
| char buf[10]; |
| ICONV_CONST char *inptr = input; |
| size_t inbytesleft = strlen (input); |
| char *outptr = buf; |
| size_t outbytesleft = sizeof (buf); |
| size_t res = iconv (cd_ascii_to_88591, |
| &inptr, &inbytesleft, |
| &outptr, &outbytesleft); |
| if (res == 0) |
| result |= 2; |
| iconv_close (cd_ascii_to_88591); |
| } |
| } |
| /* Test against AIX 6.1..7.1 bug: Buffer overrun. */ |
| { |
| iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1"); |
| if (cd_88591_to_utf8 != (iconv_t)(-1)) |
| { |
| static ICONV_CONST char input[] = "\304"; |
| static char buf[2] = { (char)0xDE, (char)0xAD }; |
| ICONV_CONST char *inptr = input; |
| size_t inbytesleft = 1; |
| char *outptr = buf; |
| size_t outbytesleft = 1; |
| size_t res = iconv (cd_88591_to_utf8, |
| &inptr, &inbytesleft, |
| &outptr, &outbytesleft); |
| if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD) |
| result |= 4; |
| iconv_close (cd_88591_to_utf8); |
| } |
| } |
| #if 0 /* This bug could be worked around by the caller. */ |
| /* Test against HP-UX 11.11 bug: Positive return value instead of 0. */ |
| { |
| iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591"); |
| if (cd_88591_to_utf8 != (iconv_t)(-1)) |
| { |
| static ICONV_CONST char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337"; |
| char buf[50]; |
| ICONV_CONST char *inptr = input; |
| size_t inbytesleft = strlen (input); |
| char *outptr = buf; |
| size_t outbytesleft = sizeof (buf); |
| size_t res = iconv (cd_88591_to_utf8, |
| &inptr, &inbytesleft, |
| &outptr, &outbytesleft); |
| if ((int)res > 0) |
| result |= 8; |
| iconv_close (cd_88591_to_utf8); |
| } |
| } |
| #endif |
| /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is |
| provided. */ |
| { |
| /* Try standardized names. */ |
| iconv_t cd1 = iconv_open ("UTF-8", "EUC-JP"); |
| /* Try IRIX, OSF/1 names. */ |
| iconv_t cd2 = iconv_open ("UTF-8", "eucJP"); |
| /* Try AIX names. */ |
| iconv_t cd3 = iconv_open ("UTF-8", "IBM-eucJP"); |
| /* Try HP-UX names. */ |
| iconv_t cd4 = iconv_open ("utf8", "eucJP"); |
| if (cd1 == (iconv_t)(-1) && cd2 == (iconv_t)(-1) |
| && cd3 == (iconv_t)(-1) && cd4 == (iconv_t)(-1)) |
| result |= 16; |
| if (cd1 != (iconv_t)(-1)) |
| iconv_close (cd1); |
| if (cd2 != (iconv_t)(-1)) |
| iconv_close (cd2); |
| if (cd3 != (iconv_t)(-1)) |
| iconv_close (cd3); |
| if (cd4 != (iconv_t)(-1)) |
| iconv_close (cd4); |
| } |
| return result; |
| ]])], |
| [am_cv_func_iconv_works=yes], , |
| [case "$host_os" in |
| aix* | hpux*) am_cv_func_iconv_works="guessing no" ;; |
| *) am_cv_func_iconv_works="guessing yes" ;; |
| esac]) |
| test "$am_cv_func_iconv_works" = no || break |
| done |
| LIBS="$am_save_LIBS" |
| ]) |
| case "$am_cv_func_iconv_works" in |
| *no) am_func_iconv=no am_cv_lib_iconv=no ;; |
| *) am_func_iconv=yes ;; |
| esac |
| else |
| am_func_iconv=no am_cv_lib_iconv=no |
| fi |
| if test "$am_func_iconv" = yes; then |
| AC_DEFINE([HAVE_ICONV], [1], |
| [Define if you have the iconv() function and it works.]) |
| fi |
| if test "$am_cv_lib_iconv" = yes; then |
| AC_MSG_CHECKING([how to link with libiconv]) |
| AC_MSG_RESULT([$LIBICONV]) |
| else |
| dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV |
| dnl either. |
| CPPFLAGS="$am_save_CPPFLAGS" |
| LIBICONV= |
| LTLIBICONV= |
| fi |
| AC_SUBST([LIBICONV]) |
| AC_SUBST([LTLIBICONV]) |
| ]) |
| |
| 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". |
| AC_DEFUN_ONCE([AM_ICONV], |
| [ |
| AM_ICONV_LINK |
| if test "$am_cv_func_iconv" = yes; then |
| 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 |
| size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft); |
| ]], |
| [[]])], |
| [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'. |
| gl_cv_iconv_nonconst=yes |
| fi |
| if test $gl_cv_iconv_nonconst = yes; then |
| iconv_arg1="" |
| else |
| iconv_arg1="const" |
| fi |
| AC_DEFINE_UNQUOTED([ICONV_CONST], [$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 $gl_cv_iconv_nonconst != yes; then |
| ICONV_CONST="const" |
| fi |
| ]) |
| |
| dnl A summary result, for those packages which want to print a summary at the |
| dnl end of the configuration. |
| if test "$am_func_iconv" = yes; then |
| if test -n "$LIBICONV"; then |
| am_cv_func_iconv_summary='yes, in libiconv' |
| else |
| am_cv_func_iconv_summary='yes, in libc' |
| fi |
| else |
| if test "$am_cv_func_iconv" = yes; then |
| am_cv_func_iconv_summary='not working, consider installing GNU libiconv' |
| else |
| am_cv_func_iconv_summary='no, consider installing GNU libiconv' |
| fi |
| fi |
| ]) |
