m4/xerces_transcoder_selection.m4 - xerces-c - Git at Google

 dnl @synopsis XERCES_TRANSCODER_SELECTION
 dnl
 dnl Determines the which transcoder to use
 dnl
 dnl @category C
 dnl @author James Berry
 dnl @version 2005-05-23
 dnl @license AllPermissive
 dnl
 dnl $Id$

 AC_DEFUN([XERCES_TRANSCODER_SELECTION],
 	[

 	######################################################
 	# Test for availability of each transcoder on this host.
 	# For each transcoder that's available, and hasn't been disabled, add it to our list.
 	# If the transcoder has been explicitly "enable"d, then vote for it strongly,
 	# in upper case.
 	######################################################

 	tc_list=

 	# Check for GNU iconv support
 	no_GNUiconv=false
 	AC_CHECK_HEADERS([iconv.h wchar.h string.h stdlib.h stdio.h ctype.h locale.h errno.h], [], [no_GNUiconv=true])
         # The code in iconv needs just on of these include files
 	AC_CHECK_HEADER([endian.h],
                         [],
                         [
                          AC_CHECK_HEADER([machine/endian.h],
                                          [],
                                          [
                                           AC_CHECK_HEADER([arpa/nameser_compat.h],
                                                           [],
                                                           [no_GNUiconv=true])
                                          ])
                         ])
 	AC_CHECK_FUNCS([iconv_open iconv_close iconv], [], [no_GNUiconv=true])
 	AC_MSG_CHECKING([whether we can support the GNU iconv Transcoder])
 	list_add=
 	AS_IF([! $no_GNUiconv], [
 		AC_ARG_ENABLE([transcoder-gnuiconv],
 			AS_HELP_STRING([--enable-transcoder-gnuiconv],
 				[Enable GNU iconv-based transcoder support]),
 			[AS_IF([test x"$enableval" = xyes],
 				[list_add=GNUICONV])],
 			[list_add=gnuiconv])
 	])
 	AS_IF([test x"$list_add" != x],
 		[tc_list="$tc_list -$list_add-"; AC_MSG_RESULT(yes)],
 		[AC_MSG_RESULT(no)]
 	)

 	# Check for iconv support
 	no_iconv=false
 	AC_CHECK_HEADERS([wchar.h], [], [no_iconv=true])
 	AC_CHECK_FUNCS([mblen wcstombs mbstowcs], [], [no_iconv=true])
 	AC_MSG_CHECKING([whether we can support the iconv Transcoder])
 	list_add=
 	AS_IF([! $no_iconv], [
 		AC_ARG_ENABLE([transcoder-iconv],
 			AS_HELP_STRING([--enable-transcoder-iconv],
 				[Enable iconv-based transcoder support]),
 			[AS_IF([test x"$enableval" = xyes],
 				[list_add=ICONV])],
 			[list_add=iconv])
 	])
 	AS_IF([test x"$list_add" != x],
 		[tc_list="$tc_list -$list_add-"; AC_MSG_RESULT(yes)],
 		[AC_MSG_RESULT(no)]
 	)

 	# Check for ICU
 	AC_REQUIRE([XERCES_ICU_PREFIX])
 	AC_MSG_CHECKING([whether we can support the ICU Transcoder])
 	list_add=
 	AS_IF([test x"$xerces_cv_icu_present" != x"no"], [
 		AC_ARG_ENABLE([transcoder-icu],
 			AS_HELP_STRING([--enable-transcoder-icu],
 				[Enable icu-based transcoder support]),
 			[AS_IF([test x"$enableval" = xyes],
 				[list_add=ICU])],
 			[list_add=icu])
 	])
 	AS_IF([test x"$list_add" != x],
 		[tc_list="$tc_list -$list_add-"; AC_MSG_RESULT(yes)],
 		[AC_MSG_RESULT(no)]
 	)


 	# Check for platform-specific transcoders
 	list_add=
 	case $host_os in
 	darwin*)
 		AC_MSG_CHECKING([whether we can support the MacOSUnicodeConverter Transcoder])
 		AS_IF([test x"$ac_cv_header_CoreServices_CoreServices_h" = xyes], [
 			AC_ARG_ENABLE([transcoder-macosunicodeconverter],
 				AS_HELP_STRING([--enable-transcoder-macosunicodeconverter],
 					[Enable MacOSUnicodeConverter-based transcoder support]),
 				[AS_IF([test x"$enableval" = xyes],
 					[list_add=MACOSUNICODECONVERTER])],
 				[list_add=macosunicodeconverter])
 		])
 		AS_IF([test x"$list_add" != x],
 			[tc_list="$tc_list -$list_add-"; AC_MSG_RESULT(yes)],
 			[AC_MSG_RESULT(no)]
 		)
 		;;
 	windows* | mingw*)
 		AC_MSG_CHECKING([whether we can support the Windows Transcoder])
 		AC_ARG_ENABLE([transcoder-windows],
 			AS_HELP_STRING([--enable-transcoder-windows],
 				[Enable Windows-based transcoder support]),
 			[AS_IF([test x"$enableval" = xyes],
 				[list_add=WINDOWS])],
 			[list_add=windows])
 		AS_IF([test x"$list_add" != x],
 			[tc_list="$tc_list -$list_add-"; AC_MSG_RESULT(yes)],
 			[AC_MSG_RESULT(no)]
 		)
 		;;
 	cygwin*)
 		# Only add it to the list if the user explicitly asked
                 # for it.
 		#
 		AC_MSG_CHECKING([whether to use the Windows Transcoder])
 		AC_ARG_ENABLE([transcoder-windows],
 			AS_HELP_STRING([--enable-transcoder-windows],
 				[Enable Windows-based transcoder support]),
 			[AS_IF([test x"$enableval" = xyes],
 			       [list_add=WINDOWS])])
 		AS_IF([test x"$list_add" != x],
 			[tc_list="$tc_list -$list_add-"; AC_MSG_RESULT(yes)],
 			[AC_MSG_RESULT(no)]
 		)
 		;;
 	esac

 	# TODO: Tests for additional transcoders

 	######################################################
 	# Determine which transcoder to use.
 	#
 	# We do this in two passes. Transcoders that have been enabled with "yes",
 	# and which start out in upper case, get the top priority on the first pass.
 	# On the second pass, we consider those which are simply available, but
 	# which were not "disable"d (these won't even be in our list).
 	######################################################
 	transcoder=
 	az_lower=abcdefghijklmnopqrstuvwxyz
 	az_upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ
 	AC_MSG_CHECKING([for which Transcoder to use (choices:$tc_list)])
 	for i in 1 2; do
  		# Swap upper/lower case in the tc_list. Cannot use tr ranges
                 # because of the portability issues.
                 #
 		tc_list=`echo $tc_list | tr "$az_lower$az_upper" "$az_upper$az_lower"`

 		# Check for each transcoder, in implicit rank order
 		case $tc_list in

 		*-icu-*)
 			transcoder=icu
 			AC_DEFINE([XERCES_USE_TRANSCODER_ICU], 1, [Define to use the ICU-based transcoder])
 			LIBS="${LIBS} ${xerces_cv_icu_libs}"
 			break
 			;;

 		*-macosunicodeconverter-*)
 			transcoder=macosunicodeconverter
 			AC_DEFINE([XERCES_USE_TRANSCODER_MACOSUNICODECONVERTER], 1, [Define to use the Mac OS UnicodeConverter-based transcoder])
 			XERCES_LINK_DARWIN_FRAMEWORK([CoreServices])
 			break
 			;;

 		*-gnuiconv-*)
 			transcoder=gnuiconv
 			AC_DEFINE([XERCES_USE_TRANSCODER_GNUICONV], 1, [Define to use the GNU iconv transcoder])
 			break
 			;;

 		*-windows-*)
 			transcoder=windows
 			AC_DEFINE([XERCES_USE_TRANSCODER_WINDOWS], 1, [Define to use the Windows transcoder])
 			break
 			;;

 		*-iconv-*)
 			transcoder=iconv
 			AC_DEFINE([XERCES_USE_TRANSCODER_ICONV], 1, [Define to use the iconv transcoder])
 			break
 			;;

 		*)
 			AS_IF([test $i -eq 2], [
 				AC_MSG_RESULT([none])
 				AC_MSG_ERROR([Xerces cannot function without a transcoder])
 				]
 			)
 			;;
 		esac
 	done
 	if test x"$transcoder" != x; then
 		AC_MSG_RESULT($transcoder)
 	fi

 	# Define the auto-make conditionals which determine what actually gets compiled
 	# Note that these macros can't be executed conditionally, which is why they're here, not above.
 	AM_CONDITIONAL([XERCES_USE_TRANSCODER_ICU],			[test x"$transcoder" = xicu])
 	AM_CONDITIONAL([XERCES_USE_TRANSCODER_MACOSUNICODECONVERTER],	[test x"$transcoder" = xmacosunicodeconverter])
 	AM_CONDITIONAL([XERCES_USE_TRANSCODER_GNUICONV],		[test x"$transcoder" = xgnuiconv])
 	AM_CONDITIONAL([XERCES_USE_TRANSCODER_ICONV],			[test x"$transcoder" = xiconv])
 	AM_CONDITIONAL([XERCES_USE_TRANSCODER_WINDOWS],			[test x"$transcoder" = xwindows])

 	]
 )
	dnl @synopsis XERCES_TRANSCODER_SELECTION
	dnl
	dnl Determines the which transcoder to use
	dnl
	dnl @category C
	dnl @author James Berry
	dnl @version 2005-05-23
	dnl @license AllPermissive
	dnl
	dnl $Id$

	AC_DEFUN([XERCES_TRANSCODER_SELECTION],
	[

	######################################################
	# Test for availability of each transcoder on this host.
	# For each transcoder that's available, and hasn't been disabled, add it to our list.
	# If the transcoder has been explicitly "enable"d, then vote for it strongly,
	# in upper case.
	######################################################

	tc_list=

	# Check for GNU iconv support
	no_GNUiconv=false
	AC_CHECK_HEADERS([iconv.h wchar.h string.h stdlib.h stdio.h ctype.h locale.h errno.h], [], [no_GNUiconv=true])
	# The code in iconv needs just on of these include files
	AC_CHECK_HEADER([endian.h],
	[],
	[
	AC_CHECK_HEADER([machine/endian.h],
	[],
	[
	AC_CHECK_HEADER([arpa/nameser_compat.h],
	[],
	[no_GNUiconv=true])
	])
	])
	AC_CHECK_FUNCS([iconv_open iconv_close iconv], [], [no_GNUiconv=true])
	AC_MSG_CHECKING([whether we can support the GNU iconv Transcoder])
	list_add=
	AS_IF([! $no_GNUiconv], [
	AC_ARG_ENABLE([transcoder-gnuiconv],
	AS_HELP_STRING([--enable-transcoder-gnuiconv],
	[Enable GNU iconv-based transcoder support]),
	[AS_IF([test x"$enableval" = xyes],
	[list_add=GNUICONV])],
	[list_add=gnuiconv])
	])
	AS_IF([test x"$list_add" != x],
	[tc_list="$tc_list -$list_add-"; AC_MSG_RESULT(yes)],
	[AC_MSG_RESULT(no)]
	)

	# Check for iconv support
	no_iconv=false
	AC_CHECK_HEADERS([wchar.h], [], [no_iconv=true])
	AC_CHECK_FUNCS([mblen wcstombs mbstowcs], [], [no_iconv=true])
	AC_MSG_CHECKING([whether we can support the iconv Transcoder])
	list_add=
	AS_IF([! $no_iconv], [
	AC_ARG_ENABLE([transcoder-iconv],
	AS_HELP_STRING([--enable-transcoder-iconv],
	[Enable iconv-based transcoder support]),
	[AS_IF([test x"$enableval" = xyes],
	[list_add=ICONV])],
	[list_add=iconv])
	])
	AS_IF([test x"$list_add" != x],
	[tc_list="$tc_list -$list_add-"; AC_MSG_RESULT(yes)],
	[AC_MSG_RESULT(no)]
	)

	# Check for ICU
	AC_REQUIRE([XERCES_ICU_PREFIX])
	AC_MSG_CHECKING([whether we can support the ICU Transcoder])
	list_add=
	AS_IF([test x"$xerces_cv_icu_present" != x"no"], [
	AC_ARG_ENABLE([transcoder-icu],
	AS_HELP_STRING([--enable-transcoder-icu],
	[Enable icu-based transcoder support]),
	[AS_IF([test x"$enableval" = xyes],
	[list_add=ICU])],
	[list_add=icu])
	])
	AS_IF([test x"$list_add" != x],
	[tc_list="$tc_list -$list_add-"; AC_MSG_RESULT(yes)],
	[AC_MSG_RESULT(no)]
	)


	# Check for platform-specific transcoders
	list_add=
	case $host_os in
	darwin*)
	AC_MSG_CHECKING([whether we can support the MacOSUnicodeConverter Transcoder])
	AS_IF([test x"$ac_cv_header_CoreServices_CoreServices_h" = xyes], [
	AC_ARG_ENABLE([transcoder-macosunicodeconverter],
	AS_HELP_STRING([--enable-transcoder-macosunicodeconverter],
	[Enable MacOSUnicodeConverter-based transcoder support]),
	[AS_IF([test x"$enableval" = xyes],
	[list_add=MACOSUNICODECONVERTER])],
	[list_add=macosunicodeconverter])
	])
	AS_IF([test x"$list_add" != x],
	[tc_list="$tc_list -$list_add-"; AC_MSG_RESULT(yes)],
	[AC_MSG_RESULT(no)]
	)
	;;
	windows* \| mingw*)
	AC_MSG_CHECKING([whether we can support the Windows Transcoder])
	AC_ARG_ENABLE([transcoder-windows],
	AS_HELP_STRING([--enable-transcoder-windows],
	[Enable Windows-based transcoder support]),
	[AS_IF([test x"$enableval" = xyes],
	[list_add=WINDOWS])],
	[list_add=windows])
	AS_IF([test x"$list_add" != x],
	[tc_list="$tc_list -$list_add-"; AC_MSG_RESULT(yes)],
	[AC_MSG_RESULT(no)]
	)
	;;
	cygwin*)
	# Only add it to the list if the user explicitly asked
	# for it.
	#
	AC_MSG_CHECKING([whether to use the Windows Transcoder])
	AC_ARG_ENABLE([transcoder-windows],
	AS_HELP_STRING([--enable-transcoder-windows],
	[Enable Windows-based transcoder support]),
	[AS_IF([test x"$enableval" = xyes],
	[list_add=WINDOWS])])
	AS_IF([test x"$list_add" != x],
	[tc_list="$tc_list -$list_add-"; AC_MSG_RESULT(yes)],
	[AC_MSG_RESULT(no)]
	)
	;;
	esac

	# TODO: Tests for additional transcoders

	######################################################
	# Determine which transcoder to use.
	#
	# We do this in two passes. Transcoders that have been enabled with "yes",
	# and which start out in upper case, get the top priority on the first pass.
	# On the second pass, we consider those which are simply available, but
	# which were not "disable"d (these won't even be in our list).
	######################################################
	transcoder=
	az_lower=abcdefghijklmnopqrstuvwxyz
	az_upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ
	AC_MSG_CHECKING([for which Transcoder to use (choices:$tc_list)])
	for i in 1 2; do
	# Swap upper/lower case in the tc_list. Cannot use tr ranges
	# because of the portability issues.
	#
	tc_list=`echo $tc_list \| tr "$az_lower$az_upper" "$az_upper$az_lower"`

	# Check for each transcoder, in implicit rank order
	case $tc_list in

	-icu-)
	transcoder=icu
	AC_DEFINE([XERCES_USE_TRANSCODER_ICU], 1, [Define to use the ICU-based transcoder])
	LIBS="${LIBS} ${xerces_cv_icu_libs}"
	break
	;;

	-macosunicodeconverter-)
	transcoder=macosunicodeconverter
	AC_DEFINE([XERCES_USE_TRANSCODER_MACOSUNICODECONVERTER], 1, [Define to use the Mac OS UnicodeConverter-based transcoder])
	XERCES_LINK_DARWIN_FRAMEWORK([CoreServices])
	break
	;;

	-gnuiconv-)
	transcoder=gnuiconv
	AC_DEFINE([XERCES_USE_TRANSCODER_GNUICONV], 1, [Define to use the GNU iconv transcoder])
	break
	;;

	-windows-)
	transcoder=windows
	AC_DEFINE([XERCES_USE_TRANSCODER_WINDOWS], 1, [Define to use the Windows transcoder])
	break
	;;

	-iconv-)
	transcoder=iconv
	AC_DEFINE([XERCES_USE_TRANSCODER_ICONV], 1, [Define to use the iconv transcoder])
	break
	;;

	*)
	AS_IF([test $i -eq 2], [
	AC_MSG_RESULT([none])
	AC_MSG_ERROR([Xerces cannot function without a transcoder])
	]
	)
	;;
	esac
	done
	if test x"$transcoder" != x; then
	AC_MSG_RESULT($transcoder)
	fi

	# Define the auto-make conditionals which determine what actually gets compiled
	# Note that these macros can't be executed conditionally, which is why they're here, not above.
	AM_CONDITIONAL([XERCES_USE_TRANSCODER_ICU], [test x"$transcoder" = xicu])
	AM_CONDITIONAL([XERCES_USE_TRANSCODER_MACOSUNICODECONVERTER], [test x"$transcoder" = xmacosunicodeconverter])
	AM_CONDITIONAL([XERCES_USE_TRANSCODER_GNUICONV], [test x"$transcoder" = xgnuiconv])
	AM_CONDITIONAL([XERCES_USE_TRANSCODER_ICONV], [test x"$transcoder" = xiconv])
	AM_CONDITIONAL([XERCES_USE_TRANSCODER_WINDOWS], [test x"$transcoder" = xwindows])

	]
	)