2008-08-27 20:38:55 +00:00
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dnl
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dnl Test for libiconv
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dnl
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dnl This macros shamelessly stolen from
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dnl http://gcc.gnu.org/ml/gcc-bugs/2001-06/msg01398.html.
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dnl Written by Bruno Haible.
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dnl
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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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dnl
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2010-03-03 21:49:27 +00:00
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AC_CHECK_HEADERS(iconv.h)
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2008-08-27 20:38:55 +00:00
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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_TRY_LINK([#include <stdlib.h>
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#include <iconv.h>],
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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="$LIBS -liconv"
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AC_TRY_LINK([#include <stdlib.h>
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#include <iconv.h>],
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[iconv_t cd = iconv_open("","");
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iconv(cd,NULL,NULL,NULL,NULL);
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iconv_close(cd);],
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am_cv_lib_iconv=yes
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am_cv_func_iconv=yes)
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LIBS="$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_MSG_CHECKING([for iconv declaration])
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AC_CACHE_VAL(am_cv_proto_iconv, [
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AC_TRY_COMPILE([
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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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#if defined(__STDC__) || defined(__cplusplus)
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size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
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#else
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size_t iconv();
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#endif
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], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
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am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
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am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
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AC_MSG_RESULT([$]{ac_t:-
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}[$]am_cv_proto_iconv)
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AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
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[Define as const if the declaration of iconv() needs const.])
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else
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echo '*** The iconv library is needed but could not be found.'
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echo '*** Please install it and re-run configure. You can find iconv'
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echo '*** at http://www.gnu.org/software/libiconv/'
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exit 1
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fi
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ICONV_LIBS=
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if test "$am_cv_lib_iconv" = yes; then
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ICONV_LIBS="-liconv"
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fi
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AC_SUBST(ICONV_LIBS)
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