iconv.m4

# LIBICONV_CHECK_CONFIG ([DEFAULT-ACTION])
# ----------------------------------------------------------
#
# Checks for iconv.  DEFAULT-ACTION is the string yes or no to
# specify whether to default to --with-iconv or --without-iconv.
# If not supplied, DEFAULT-ACTION is no.
#
# This macro #defines HAVE_ICONV if a required header files is
# found, and sets @ICONV_LDFLAGS@ and @ICONV_CFLAGS@ to the necessary
# values.
#
# This macro is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

AC_DEFUN([LIBICONV_TRY_LINK],
[
found_iconv=$1
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);
]])],[found_iconv="yes"],[])
])dnl

AC_DEFUN([LIBICONV_CHECK_CONFIG],
[
	AC_ARG_WITH([iconv],[
If you want to specify iconv installation directories:
AS_HELP_STRING([--with-iconv@<:@=DIR@:>@], [use iconv from given base install directory (DIR), default is to search through a number of common places for the iconv files.])],
		[
			if test "$withval" = "yes"; then
				ICONV_CFLAGS="-I/usr/include"
				ICONV_LDFLAGS="-L/usr/lib"
				_iconv_dir_set=$withval
			elif test "$withval" != "no"; then
				_iconv_dir_lib="$withval/lib"
				ICONV_CFLAGS="-I$withval/include"
				ICONV_LDFLAGS="-L$_iconv_dir_lib"
				_iconv_dir_set="yes"
			fi
		]
	)

	AC_ARG_WITH([iconv-include],
		AS_HELP_STRING([--with-iconv-include@<:@=DIR@:>@],
			[use iconv include headers from given path.]
		),
		[
			ICONV_CFLAGS="-I$withval"
			_iconv_dir_set="yes"
		]
	)

	AC_ARG_WITH([iconv-lib],
		AS_HELP_STRING([--with-iconv-lib@<:@=DIR@:>@],
			[use iconv libraries from given path.]
		),
		[
			ICONV_LDFLAGS="-L$withval"
			_iconv_dir_lib="-L$withval"
			_iconv_dir_set="yes"
		]
	)

	AC_CHECK_HEADER([iconv.h],[found_iconv=yes])
	AC_MSG_CHECKING(for ICONV support)
	if test -n "$_iconv_dir_set" -o "x$found_iconv" = xyes; then
		found_iconv="yes"
	elif test -f /usr/local/include/iconv.h; then
		ICONV_CFLAGS="-I/usr/local/include"
		ICONV_LDFLAGS="-L/usr/local/lib"
		found_iconv="yes"
	else
		found_iconv="no"
		AC_MSG_RESULT(no)
	fi

	if test "x$found_iconv" = "xyes"; then
		am_save_CFLAGS="$CFLAGS"
		am_save_LDFLAGS="$LDFLAGS"
		am_save_LIBS="$LIBS"

		CFLAGS="$CFLAGS $ICONV_CFLAGS"
		LDFLAGS="$LDFLAGS $ICONV_LDFLAGS"

		LIBICONV_TRY_LINK([no])

		if test "x$found_iconv" = "xno"; then
			ICONV_LIBS="-liconv"
			if test "x$enable_static_libs" = "xyes"; then
				test "x$static_linking_support" = "xno" -a -z "$_iconv_dir_lib" && AC_MSG_ERROR(["Compiler not support statically linked libs from default folders"])

				if test "x$static_linking_support" = "xno"; then
					ICONV_LIBS="$_iconv_dir_lib/libiconv.a"
				else
					ICONV_LIBS="${static_linking_support}static $ICONV_LIBS ${static_linking_support}dynamic"
				fi
			fi
			LIBS="$LIBS $ICONV_LIBS"
			LIBICONV_TRY_LINK([no])
		fi

		LIBS="$am_save_LIBS"
		CFLAGS="$am_save_CFLAGS"
		LDFLAGS="$am_save_LDFLAGS"
	fi

	if test "x$found_iconv" = "xyes"; then
		AC_DEFINE([HAVE_ICONV], 1, [Define to 1 if you have the 'libiconv' library (-liconv)])
		AC_MSG_RESULT(yes)
	else
		ICONV_LIBS=""
		ICONV_CFLAGS=""
		ICONV_LDFLAGS=""
	fi

	AC_SUBST(ICONV_LIBS)
	AC_SUBST(ICONV_CFLAGS)
	AC_SUBST(ICONV_LDFLAGS)
])dnl