# iconv.m4 serial 19 (gettext-0.18.2)

dnl Copyright (C) 2000-2002, 2007-2014, 2016 Free Software Foundation, 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_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 bug: Failures are not distinguishable from successful

     returns.  */

  {

    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.  */

  if (/* Try standardized names.  */

      iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1)

      /* Try IRIX, OSF/1 names.  */

      && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1)

      /* Try AIX names.  */

      && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1)

      /* Try HP-UX names.  */

      && iconv_open ("utf8", "eucJP") == (iconv_t)(-1))

    result |= 16;

  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 for Autoconf >= 2.64, in order to

dnl 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.

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],

[

  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(

           [[

#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])

    AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_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

         ICONV_CONST="const"

       fi

      ])

  fi

])