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	diff --git a/m4/herwig.m4 b/m4/herwig.m4
	--- a/m4/herwig.m4
	+++ b/m4/herwig.m4
	@@ -1,853 +1,863 @@
	# check for gcc bug http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34130
	AC_DEFUN([HERWIG_CHECK_ABS_BUG],
	[
	AC_REQUIRE([HERWIG_COMPILERFLAGS])
	if test "$GCC" = "yes"; then
	AC_MSG_CHECKING([for gcc abs bug])
	AC_RUN_IFELSE([
	AC_LANG_PROGRAM(
	[[ int foo (int i) { return -2 * __builtin_abs(i - 2); } ]],
	[[ if ( foo(1) != -2 \|\| foo(3) != -2 ) return 1; ]]
	)],
	[ AC_MSG_RESULT([not found. Compiler is ok.]) ],
	[
	AC_MSG_RESULT([found. Builtin abs() is buggy.])
	AC_MSG_CHECKING([if -fno-builtin-abs works])
	oldcxxflags=$CXXFLAGS
	CXXFLAGS="$CXXFLAGS -fno-builtin-abs"
	AC_RUN_IFELSE([
	AC_LANG_PROGRAM(
	[[
	#include <cstdlib>
	int foo (int i) { return -2 * std::abs(i - 2); }
	]],
	[[
	if (foo(1) != -2 \|\| foo(3) != -2) return 1;
	]]
	)],
	[
	AC_MSG_RESULT([yes. Setting -fno-builtin-abs.])
	AM_CXXFLAGS="$AM_CXXFLAGS -fno-builtin-abs"
	AM_CFLAGS="$AM_CFLAGS -fno-builtin-abs"
	],
	[
	AC_MSG_RESULT([no. Setting -fno-builtin.])
	AC_MSG_WARN([
	*****************************************************************************
	For this version of gcc, -fno-builtin-abs alone did not work to avoid the
	gcc abs() bug. Instead, all gcc builtin functions are now disabled.
	Update gcc if possible.
	*****************************************************************************])
	AM_CXXFLAGS="$AM_CXXFLAGS -fno-builtin"
	AM_CFLAGS="$AM_CFLAGS -fno-builtin"
	]
	)
	CXXFLAGS=$oldcxxflags
	]
	)
	fi
	])

	dnl ##### THEPEG #####
	AC_DEFUN([HERWIG_CHECK_THEPEG],
	[
	defaultlocation="${prefix}"
	test "x$defaultlocation" = xNONE && defaultlocation="${ac_default_prefix}"
	AC_MSG_CHECKING([for libThePEG in])
	AC_ARG_WITH(thepeg,
	AC_HELP_STRING([--with-thepeg=DIR],[location of ThePEG installation]),
	[],
	[with_thepeg="${defaultlocation}"])
	AC_MSG_RESULT([$with_thepeg])

	if test "x$with_thepeg" = "xno"; then
	AC_MSG_ERROR([Cannot build Herwig++ without ThePEG. Please set --with-thepeg.])
	fi

	THEPEGLDFLAGS="-L${with_thepeg}/lib/ThePEG"

	THEPEGHASLHAPDF="no"
	if test -e ${with_thepeg}/lib/ThePEG/ThePEGLHAPDF.so ; then
	THEPEGHASLHAPDF="yes"
	fi
	if test "${host_cpu}" == "x86_64" -a -e ${with_thepeg}/lib64/ThePEG/libThePEG.so ; then
	THEPEGLDFLAGS="-L${with_thepeg}/lib64/ThePEG"
	if test -e ${with_thepeg}/lib64/ThePEG/ThePEGLHAPDF.so ; then
	THEPEGHASLHAPDF="yes"
	fi
	fi

	if test "x$THEPEGHASLHAPDF" == "xno" ; then
	AC_MSG_ERROR([Herwig++ requires ThePEG to be build with lhapdf.])
	fi

	THEPEGHASFASTJET="no"
	if test -e ${with_thepeg}/lib/ThePEG/FastJetFinder.so ; then
	THEPEGHASFASTJET="yes"
	fi
	if test "${host_cpu}" == "x86_64" -a -e ${with_thepeg}/lib64/ThePEG/libThePEG.so ; then
	THEPEGLDFLAGS="-L${with_thepeg}/lib64/ThePEG"
	if test -e ${with_thepeg}/lib64/ThePEG/FastJetFinder.so ; then
	THEPEGHASFASTJET="yes"
	fi
	fi

	if test "x$THEPEGHASFASTJET" == "xno" ; then
	AC_MSG_ERROR([Herwig++ requires ThePEG to be build with FastJet.])
	fi

	THEPEGPATH="${with_thepeg}"

	oldldflags="$LDFLAGS"
	oldlibs="$LIBS"

	LDFLAGS="$LDFLAGS $THEPEGLDFLAGS"
	AC_CHECK_LIB([ThePEG],[debugThePEG],[],
	[AC_MSG_ERROR([No ThePEG libraries in $THEPEGLDFLAGS. Please set --with-thepeg.])])

	AC_SUBST([THEPEGLIB],[-lThePEG])
	AC_SUBST(THEPEGLDFLAGS)
	AC_SUBST(THEPEGPATH)
	AC_SUBST(THEPEGHASLHAPDF)
	AC_SUBST(THEPEGHASFASTJET)

	LIBS="$oldlibs"
	LDFLAGS="$oldldflags"

	AC_MSG_CHECKING([for ThePEG headers in])
	AC_ARG_WITH([thepeg-headers],
	AC_HELP_STRING([--with-thepeg-headers=DIR],[location of ThePEG include directory]),
	[],
	[with_thepeg_headers="${with_thepeg}/include"])
	AC_MSG_RESULT([$with_thepeg_headers])

	if test "x$with_thepeg_headers" = "xno"; then
	AC_MSG_ERROR([Cannot build Herwig++ without ThePEG headers. Please set --with-thepeg-headers.])
	fi

	THEPEGINCLUDE="-I$with_thepeg_headers"

	oldcppflags="$CPPFLAGS"
	CPPFLAGS="$CPPFLAGS $THEPEGINCLUDE"
	AC_CHECK_HEADER([ThePEG/Config/ThePEG.h],[],
	[AC_MSG_ERROR([No ThePEG headers in $with_thepeg_headers. Please set --with-thepeg-headers.])])
	CPPFLAGS="$oldcppflags"

	AC_SUBST(THEPEGINCLUDE)

	AC_MSG_CHECKING([for HepMCAnalysis.so in ThePEG])

	THEPEGHASHEPMC="no"
	if test -e ${with_thepeg}/lib/ThePEG/HepMCAnalysis.so ; then
	THEPEGHASHEPMC="yes"
	fi
	if test "${host_cpu}" == "x86_64" -a -e ${with_thepeg}/lib64/ThePEG/libThePEG.so ; then
	THEPEGLDFLAGS="-L${with_thepeg}/lib64/ThePEG"
	if test -e ${with_thepeg}/lib64/ThePEG/HepMCAnalysis.so ; then
	THEPEGHASHEPMC="yes"
	fi
	fi

	if test "x$THEPEGHASHEPMC" == "xno" ; then
	CREATE_HEPMC="# create"
	AC_MSG_RESULT([not found])
	else
	CREATE_HEPMC="create"
	AC_MSG_RESULT([found])
	fi

	AC_SUBST([CREATE_HEPMC])

	AC_MSG_CHECKING([for RivetAnalysis.so in ThePEG])

	THEPEGHASRIVET="no"
	if test -e ${with_thepeg}/lib/ThePEG/RivetAnalysis.so ; then
	THEPEGHASRIVET="yes"
	fi
	if test "${host_cpu}" == "x86_64" -a -e ${with_thepeg}/lib64/ThePEG/libThePEG.so ; then
	THEPEGLDFLAGS="-L${with_thepeg}/lib64/ThePEG"
	if test -e ${with_thepeg}/lib64/ThePEG/RivetAnalysis.so ; then
	THEPEGHASRIVET="yes"
	fi
	fi

	if test "x$THEPEGHASRIVET" == "xno" ; then
	CREATE_RIVET="# create"
	AC_MSG_RESULT([not found])
	else
	CREATE_RIVET="create"
	AC_MSG_RESULT([found])
	fi

	AC_SUBST([CREATE_RIVET])
	])

	dnl ##### LOOPTOOLS #####
	AC_DEFUN([HERWIG_LOOPTOOLS],
	[
	AC_REQUIRE([AC_PROG_FC])
	AC_REQUIRE([AC_FC_LIBRARY_LDFLAGS])
	AC_REQUIRE([AC_PROG_CC])
	AC_REQUIRE([HERWIG_COMPILERFLAGS])

	AC_MSG_CHECKING([if Looptools build works])
	enable_looptools=yes

	if test "x$GCC" = "xyes"; then
	case "${host}" in
	x86_64-\|-darwin1*)
	AM_FCFLAGS="$AM_FCFLAGS -fdefault-integer-8"
	;;
	esac

	AC_LANG_PUSH([Fortran])
	oldFCFLAGS="$FCFLAGS"
	FCFLAGS="$AM_FCFLAGS"
	AC_COMPILE_IFELSE(
	AC_LANG_PROGRAM([],[ print *[,]"Hello"]),
	[],
	[AC_MSG_RESULT([no])
	AC_MSG_ERROR([needs gfortran on 64bit machines])]
	)
	FCFLAGS="$oldFCFLAGS"
	AC_LANG_POP([Fortran])
	fi
	AC_MSG_RESULT([$enable_looptools])

	AC_SUBST([F77],[$FC])
	AC_SUBST([FFLAGS],[$FCFLAGS])
	AC_SUBST([AM_FFLAGS],[$AM_FCFLAGS])
	AC_SUBST([FLIBS],[$FCLIBS])
	])

	dnl ##### VBFNLO #####
	AC_DEFUN([HERWIG_CHECK_VBFNLO],
	[
	AC_MSG_CHECKING([for VBFNLO])

	AC_ARG_WITH([vbfnlo],
	AS_HELP_STRING([--with-vbfnlo=DIR], [Installation path of VBFNLO]),
	[],
	[with_vbfnlo=no]

	)

	AC_MSG_RESULT([$with_vbfnlo])

	AS_IF([test "x$with_vbfnlo" != "xno"],
	[AC_CHECK_FILES(
	${with_vbfnlo}/lib/VBFNLO/libVBFNLO.so,
	[have_vbfnlo=lib], [have_vbfnlo=no])],
	[have_vbfnlo=no])

	AS_IF([test "x$with_vbfnlo" != "xno" -a "x$have_vbfnlo" = "xno" ],
	[AC_CHECK_FILES(
	${with_vbfnlo}/lib64/VBFNLO/libVBFNLO.so,
	[have_vbfnlo=lib64], [have_vbfnlo=no])])

	+AS_IF([test "x$with_vbfnlo" != "xno" -a "x$have_vbfnlo" = "xno" ],
	+ [AC_CHECK_FILES(
	+ ${with_vbfnlo}/lib/VBFNLO/libVBFNLO.dylib,
	+ [have_vbfnlo=lib], [have_vbfnlo=no])])
	+
	+AS_IF([test "x$with_vbfnlo" != "xno" -a "x$have_vbfnlo" = "xno" ],
	+ [AC_CHECK_FILES(
	+ ${with_vbfnlo}/lib64/VBFNLO/libVBFNLO.dylib,
	+ [have_vbfnlo=lib64], [have_vbfnlo=no])])
	+
	AS_IF([test "x$have_vbfnlo" = "xlib"],
	[VBFNLOLIBS=${with_vbfnlo}/lib/VBFNLO
	AC_SUBST(VBFNLOLIBS)
	])

	AS_IF([test "x$have_vbfnlo" = "xlib64"],
	[VBFNLOLIBS=${with_vbfnlo}/lib64/VBFNLO
	AC_SUBST(VBFNLOLIBS)
	])

	AS_IF([test "x$with_vbfnlo" != "xno" -a "x$have_vbfnlo" = "xno"],
	[AC_MSG_ERROR([vbfnlo requested but not found])])

	AM_CONDITIONAL(HAVE_VBFNLO,[test "x$have_vbfnlo" = "xlib" -o "x$have_vbfnlo" = "xlib64"])

	if test "x$have_vbfnlo" = "xlib" -o "x$have_vbfnlo" = "xlib64" ; then
	VBFNLOINCLUDE=${with_vbfnlo}/include
	AC_SUBST(VBFNLOINCLUDE)
	VBFNLOLIB=${with_vbfnlo}/${have_vbfnlo}/VBFNLO
	AC_SUBST(VBFNLOLIB)
	LOAD_VBFNLO="library"
	CREATE_VBFNLO="create"
	INSERT_VBFNLO="insert"
	SET_VBFNLO="set"
	DO_VBFNLO="do"
	MKDIR_VBFNLO="mkdir"
	else
	LOAD_VBFNLO="# library"
	CREATE_VBFNLO="# create"
	INSERT_VBFNLO="# insert"
	SET_VBFNLO="# set"
	DO_VBFNLO="# do"
	MKDIR_VBFNLO="# mkdir"
	fi

	AC_SUBST([LOAD_VBFNLO])
	AC_SUBST([CREATE_VBFNLO])
	AC_SUBST([INSERT_VBFNLO])
	AC_SUBST([SET_VBFNLO])
	AC_SUBST([DO_VBFNLO])
	AC_SUBST([MKDIR_VBFNLO])

	])

	dnl ##### njet #####
	AC_DEFUN([HERWIG_CHECK_NJET],
	[
	AC_MSG_CHECKING([for njet])

	AC_ARG_WITH([njet],
	AS_HELP_STRING([--with-njet=DIR], [Installation path of njet]),
	[],
	[with_njet=no]

	)

	AC_MSG_RESULT([$with_njet])

	AS_IF([test "x$with_njet" != "xno"],
	[AC_CHECK_FILES(
	${with_njet}/lib/libnjet2.so,
	[have_njet=lib], [have_njet=no])],
	[have_njet=no])

	AS_IF([test "x$with_njet" != "xno" -a "x$have_njet" = "xno" ],
	[AC_CHECK_FILES(
	${with_njet}/lib64/libnjet2.so,
	[have_njet=lib64], [have_njet=no])])

	AS_IF([test "x$have_njet" = "xlib"],
	[NJETLIBPATH=${with_njet}/lib
	AC_SUBST(NJETLIBPATH)
	NJETINCLUDEPATH=${with_njet}/include
	AC_SUBST(NJETINCLUDEPATH)
	NJETPREFIX=${with_njet}
	AC_SUBST(NJETPREFIX)
	])

	AS_IF([test "x$have_njet" = "xlib64"],
	[NJETLIBPATH=${with_njet}/lib64
	AC_SUBST(NJETLIBPATH)
	NJETINCLUDEPATH=${with_njet}/include
	AC_SUBST(NJETINCLUDEPATH)
	NJETPREFIX=${with_njet}
	AC_SUBST(NJETPREFIX)
	])

	AS_IF([test "x$with_njet" != "xno" -a "x$have_njet" = "xno"],
	[AC_MSG_ERROR([njet requested but not found])])

	AM_CONDITIONAL(HAVE_NJET,[test "x$have_njet" = "xlib" -o "x$have_njet" = "xlib64"])

	if test "x$have_njet" = "xlib" -o "x$have_njet" = "xlib64" ; then
	LOAD_NJET="library"
	CREATE_NJET="create"
	INSERT_NJET="insert"
	DO_NJET="do"
	else
	LOAD_NJET="# library"
	CREATE_NJET="# create"
	INSERT_NJET="# insert"
	DO_NJET="# do"
	fi

	AC_SUBST([LOAD_NJET])
	AC_SUBST([CREATE_NJET])
	AC_SUBST([INSERT_NJET])
	AC_SUBST([DO_NJET])

	])



	dnl ##### gosam #####
	AC_DEFUN([HERWIG_CHECK_GOSAM],
	[
	AC_MSG_CHECKING([for gosam])

	AC_ARG_WITH([gosam],
	AS_HELP_STRING([--with-gosam=DIR], [Installation path of gosam]),
	[],
	[with_gosam=no]
	)

	AC_MSG_RESULT([$with_gosam])

	AS_IF([test "x$with_gosam" != "xno"],
	[AC_CHECK_FILES(
	${with_gosam}/bin/gosam.py,
	[have_gosam=lib], [have_gosam=no])],
	[have_gosam=no])

	AS_IF([test "x$have_gosam" = "xlib"],
	[GOSAMPREFIX=${with_gosam}
	AC_SUBST(GOSAMPREFIX)
	])

	AS_IF([test "x$with_gosam" != "xno" -a "x$have_gosam" = "xno"],
	[AC_MSG_ERROR([GoSam requested but not found])])

	AM_CONDITIONAL(HAVE_GOSAM,[test "x$have_gosam" = "xlib" ])

	if test "x$have_gosam" = "xlib" ; then
	LOAD_GOSAM="library"
	CREATE_GOSAM="create"
	INSERT_GOSAM="insert"
	DO_GOSAM="do"
	else
	LOAD_GOSAM="# library"
	CREATE_GOSAM="# create"
	INSERT_GOSAM="# insert"
	DO_GOSAM="# do"
	fi

	AC_SUBST([LOAD_GOSAM])
	AC_SUBST([CREATE_GOSAM])
	AC_SUBST([INSERT_GOSAM])
	AC_SUBST([DO_GOSAM])


	])


	dnl ##### gosam-contrib #####
	AC_DEFUN([HERWIG_CHECK_GOSAM_CONTRIB],
	[
	AC_MSG_CHECKING([for gosam-contrib])

	AC_ARG_WITH([gosam-contrib],
	AS_HELP_STRING([--with-gosam-contrib=DIR], [Installation path of gosam-contrib]),
	[],
	[with_gosam_contrib=no]
	)

	AC_MSG_RESULT([$with_gosam_contrib])

	AS_IF([test "x$with_gosam_contrib" = "xno" -a "x$with_gosam" != "xno"],
	[AC_CHECK_FILES(
	${with_gosam}/lib/libsamurai.so,
	[with_gosam_contrib=${with_gosam}], [])
	])

	AS_IF([test "x$with_gosam_contrib" = "xno" -a "x$with_gosam" != "xno"],
	[AC_CHECK_FILES(
	${with_gosam}/lib64/libsamurai.so,
	[with_gosam_contrib=${with_gosam}], [])
	])

	AS_IF([test "x$with_gosam_contrib" = "xno" -a "x$with_gosam" != "xno"],
	[AC_CHECK_FILES(
	${with_gosam}/lib/libsamurai.dylib,
	[with_gosam_contrib=${with_gosam}], [])
	])

	AS_IF([test "x$with_gosam_contrib" = "xno" -a "x$with_gosam" != "xno"],
	[AC_CHECK_FILES(
	${with_gosam}/lib64/libsamurai.dylib,
	[with_gosam_contrib=${with_gosam}], [])
	])

	AS_IF([test "x$with_gosam_contrib" = "xno" -a "x$with_gosam" != "xno"],
	[AC_MSG_ERROR([GoSam requested without requesting GoSam-Contrib])])

	AS_IF([test "x$with_gosam_contrib" != "xno"],
	[AC_CHECK_FILES(
	${with_gosam_contrib}/lib/libsamurai.so,
	[have_gosam_contrib=lib], [have_gosam_contrib=no])],
	[have_gosam_contrib=no])

	AS_IF([test "x$with_gosam_contrib" != "xno" -a "x$have_gosam_contrib" = "xno" ],
	[AC_CHECK_FILES(
	${with_gosam_contrib}/lib64/libsamurai.so,
	[have_gosam_contrib=lib64], [have_gosam_contrib=no])])

	AS_IF([test "x$with_gosam_contrib" != "xno" -a "x$have_gosam_contrib" = "xno" ],
	[AC_CHECK_FILES(
	${with_gosam_contrib}/lib/libsamurai.dylib,
	[have_gosam_contrib=lib], [have_gosam_contrib=no])])

	AS_IF([test "x$with_gosam_contrib" != "xno" -a "x$have_gosam_contrib" = "xno" ],
	[AC_CHECK_FILES(
	${with_gosam_contrib}/lib64/libsamurai.dylib,
	[have_gosam_contrib=lib64], [have_gosam_contrib=no])])







	AS_IF([test "x$have_gosam_contrib" != "xno"],
	[GOSAMCONTRIBPREFIX=${with_gosam_contrib}
	AC_SUBST(GOSAMCONTRIBPREFIX)
	])

	AS_IF([test "x$have_gosam_contrib" = "xlib"],
	[GOSAMCONTRIBLIBS=${with_gosam_contrib}/lib
	AC_SUBST(GOSAMCONTRIBLIBS)
	])

	AS_IF([test "x$have_gosam_contrib" = "xlib64"],
	[GOSAMCONTRIBLIBS=${with_gosam_contrib}/lib64
	AC_SUBST(GOSAMCONTRIBLIBS)
	])

	AS_IF([test "x$with_gosam_contrib" != "xno" -a "x$have_gosam_contrib" = "xno"],
	[AC_MSG_ERROR([GoSam-Contrib requested but not found])])

	AM_CONDITIONAL(HAVE_GOSAM_CONTRIB,[test "x$have_gosam_contrib" = "xlib" -o "x$have_gosam_contrib" = "xlib64"])

	if test "x$have_gosam_contrib" = "xlib" -o "x$have_gosam_contrib" = "xlib64" ; then
	LOAD_GOSAM_CONTRIB="library"
	CREATE_GOSAM_CONTRIB="create"
	INSERT_GOSAM_CONTRIB="insert"
	else
	LOAD_GOSAM_CONTRIB="# library"
	CREATE_GOSAM_CONTRIB="# create"
	INSERT_GOSAM_CONTRIB="# insert"
	fi

	AC_SUBST([LOAD_GOSAM_CONTRIB])
	AC_SUBST([CREATE_GOSAM_CONTRIB])
	AC_SUBST([INSERT_GOSAM_CONTRIB])


	])


	dnl ##### OpenLoops #####
	AC_DEFUN([HERWIG_CHECK_OPENLOOPS],
	[
	AC_MSG_CHECKING([for OpenLoops])

	AC_ARG_WITH([openloops],
	AS_HELP_STRING([--with-openloops=DIR], [Installation path of OpenLoops]),
	[],
	[with_openloops=no]

	)

	AC_MSG_RESULT([$with_openloops])

	AS_IF([test "x$with_openloops" != "xno"],
	[AC_CHECK_FILES(
	${with_openloops}/lib/libopenloops.so,
	[have_openloops=lib], [have_openloops=no])],
	[have_openloops=no])

	AS_IF([test "x$with_openloops" != "xno" -a "x$have_openloops" = "xno" ],
	[AC_CHECK_FILES(
	${with_openloops}/lib/libopenloops.dylib,
	[have_openloops=lib], [have_openloops=no])])

	AS_IF([test "x$with_openloops" != "xno" -a "x$have_openloops" = "xno" ],
	[AC_CHECK_FILES(
	${with_openloops}/lib64/libopenloops.so,
	[have_openloops=lib64], [have_openloops=no])])


	AS_IF([test "x$with_openloops" != "xno" -a "x$have_openloops" = "xno" ],
	[AC_CHECK_FILES(
	${with_openloops}/lib64/libopenloops.dylib,
	[have_openloops=lib64], [have_openloops=no])])





	AS_IF([test "x$have_openloops" = "xlib"],
	[OPENLOOPSLIBS=${with_openloops}/lib
	AC_SUBST(OPENLOOPSLIBS)
	])

	AS_IF([test "x$have_openloops" = "xlib64"],
	[OPENLOOPSLIBS=${with_openloops}/lib64
	AC_SUBST(OPENLOOPSLIBS)
	])

	AS_IF([test "x$with_openloops" != "xno" -a "x$have_openloops" = "xno"],
	[AC_MSG_ERROR([OpenLoops requested but not found])])

	AM_CONDITIONAL(HAVE_OPENLOOPS,[test "x$have_openloops" = "xlib" -o "x$have_openloops" = "xlib64"])

	if test "x$have_openloops" = "xlib" -o "x$have_openloops" = "xlib64" ; then
	OPENLOOPSPREFIX=${with_openloops}
	LOAD_OPENLOOPS="library"
	CREATE_OPENLOOPS="create"
	INSERT_OPENLOOPS="insert"
	SET_OPENLOOPS="set"
	DO_OPENLOOPS="do"
	MKDIR_OPENLOOPS="mkdir"
	else
	LOAD_OPENLOOPS="# library"
	CREATE_OPENLOOPS="# create"
	INSERT_OPENLOOPS="# insert"
	SET_OPENLOOPS="# set"
	DO_OPENLOOPS="# do"
	MKDIR_OPENLOOPS="# mkdir"
	fi

	AC_SUBST([OPENLOOPSPREFIX])
	AC_SUBST([LOAD_OPENLOOPS])
	AC_SUBST([CREATE_OPENLOOPS])
	AC_SUBST([INSERT_OPENLOOPS])
	AC_SUBST([SET_OPENLOOPS])
	AC_SUBST([DO_OPENLOOPS])
	AC_SUBST([MKDIR_OPENLOOPS])

	])

	#########################################

	dnl ##### madgraph #####
	AC_DEFUN([HERWIG_CHECK_MADGRAPH],
	[
	AC_MSG_CHECKING([for MadGraph])

	AC_ARG_WITH([madgraph],
	AS_HELP_STRING([--with-madgraph=DIR], [Installation path of MadGraph]),
	[],
	[with_madgraph=no]
	)

	AC_MSG_RESULT([$with_madgraph])

	AS_IF([test "x$with_madgraph" != "xno"],
	[AC_CHECK_FILES(
	${with_madgraph}/bin/mg5_aMC,
	[have_madgraph=yes], [have_madgraph=no])],
	[have_madgraph=no])

	AS_IF([test "x$have_madgraph" = "xyes"],
	[MADGRAPHPREFIX=${with_madgraph}
	AC_SUBST(MADGRAPHPREFIX)
	])

	AS_IF([test "x$with_madgraph" != "xno" -a "x$have_madgraph" = "xno"],
	[AC_MSG_ERROR([MadGraph requested but not found])])

	AM_CONDITIONAL(HAVE_MADGRAPH,[test "x$have_madgraph" = "xyes" ])

	if test "x$have_madgraph" = "xyes" ; then
	LOAD_MADGRAPH="library"
	CREATE_MADGRAPH="create"
	INSERT_MADGRAPH="insert"
	SET_MADGRAPH="set"
	DO_MADGRAPH="do"
	else
	LOAD_MADGRAPH="# library"
	CREATE_MADGRAPH="# create"
	INSERT_MADGRAPH="# insert"
	SET_MADGRAPH="# set"
	DO_MADGRAPH="# do"
	fi

	AC_SUBST([LOAD_MADGRAPH])
	AC_SUBST([CREATE_MADGRAPH])
	AC_SUBST([INSERT_MADGRAPH])
	AC_SUBST([SET_MADGRAPH])
	AC_SUBST([DO_MADGRAPH])

	])

	dnl ##### PDF PATH #####
	AC_DEFUN([HERWIG_PDF_PATH],
	[
	AC_MSG_CHECKING([which Herwig++ PDF data to use])
	AC_ARG_WITH(pdf,
	AC_HELP_STRING([--with-pdf=DIR],[installation path of Herwig++PDF data tarball]),
	[],
	[with_pdf=${prefix}]
	)
	HERWIG_PDF_PREFIX=${with_pdf}/share/Herwig++PDF

	if test -f "${HERWIG_PDF_PREFIX}/mrst/2008/mrstMCal.dat"; then
	AC_MSG_RESULT([$with_pdf])
	localPDFneeded=false
	else
	AC_MSG_RESULT([Using built-in PDF data set. For other data sets, set --with-pdf.])
	HERWIG_PDF_PREFIX=PDF
	localPDFneeded=true
	fi
	HERWIG_PDF_DEFAULT=${HERWIG_PDF_PREFIX}/mrst/2008/mrstMCal.dat
	HERWIG_PDF_NLO=${HERWIG_PDF_PREFIX}/mrst/2002/mrst2002nlo.dat
	HERWIG_PDF_POMERON=${HERWIG_PDF_PREFIX}/diffraction/

	AM_CONDITIONAL(WANT_LOCAL_PDF,[test "x$localPDFneeded" = "xtrue"])
	AC_SUBST(HERWIG_PDF_DEFAULT)
	AC_SUBST(HERWIG_PDF_NLO)
	AC_SUBST(HERWIG_PDF_POMERON)
	])

	dnl ###### GSL ######
	AC_DEFUN([HERWIG_CHECK_GSL],
	[
	AC_MSG_CHECKING([for gsl location])
	GSLINCLUDE=""
	GSLLIBS=""

	AC_ARG_WITH(gsl,
	AC_HELP_STRING([--with-gsl=DIR],[location of gsl installation @<:@default=system libs@:>@]),
	[],
	[with_gsl=system])

	if test "x$with_gsl" = "xno"; then
	AC_MSG_ERROR([libgsl is required. Please install the GNU scientific library and header files.])
	fi

	if test "x$with_gsl" = "xsystem"; then
	AC_MSG_RESULT([in system libraries])
	oldlibs="$LIBS"
	AC_CHECK_LIB(m,main)
	AC_CHECK_LIB(gslcblas,main)
	AC_CHECK_LIB(gsl,main,[],
	[
	AC_MSG_ERROR([Cannot find libgsl. Please install the GNU scientific library and header files or use --with-gsl=.])
	]
	)
	GSLLIBS="$LIBS"
	GSLPATH="$with_gsl"
	LIBS=$oldlibs
	else
	if test "`uname -m`" = "x86_64" -a -e "$with_gsl/lib64/libgsl.a" -a -d "$with_gsl/include/gsl"; then
	AC_MSG_RESULT([found in $with_gsl])
	GSLLIBS="-L$with_gsl/lib64 -R$with_gsl/lib64 -lgslcblas -lgsl"
	GSLINCLUDE="-I$with_gsl/include"
	GSLPATH="$with_gsl"
	elif test -e "$with_gsl/lib/libgsl.a" -a -d "$with_gsl/include/gsl"; then
	AC_MSG_RESULT([found in $with_gsl])
	GSLLIBS="-L$with_gsl/lib -R$with_gsl/lib -lgslcblas -lgsl"
	GSLINCLUDE="-I$with_gsl/include"
	GSLPATH="$with_gsl"
	else
	AC_MSG_RESULT([not found])
	AC_MSG_ERROR([Can't find $with_gsl/lib/libgsl.a or the headers in $with_gsl/include])
	fi
	fi

	AC_SUBST(GSLINCLUDE)
	AC_SUBST(GSLLIBS)
	AC_SUBST(GSLPATH)
	])

	AC_DEFUN([HERWIG_VERSIONSTRING],
	[
	if test -d $srcdir/.svn; then
	AC_CHECK_PROG(have_svnversion,[svnversion],[yes],[no])
	fi
	AM_CONDITIONAL(USE_SVNVERSION,[test "x$have_svnversion" = "xyes"])
	])

	dnl ##### COMPILERFLAGS #####
	AC_DEFUN([HERWIG_COMPILERFLAGS],
	[
	AC_REQUIRE([HERWIG_CHECK_GSL])
	AC_REQUIRE([HERWIG_CHECK_THEPEG])
	AC_REQUIRE([BOOST_REQUIRE])

	AM_CPPFLAGS="-I\$(top_builddir)/include $THEPEGINCLUDE \$(GSLINCLUDE) \$(BOOST_CPPFLAGS)"

	AC_MSG_CHECKING([for debugging mode])
	AC_ARG_ENABLE(debug,
	AC_HELP_STRING([--enable-debug],[debug mode, use --enable-debug=slow for additional options that slow down the run.]),
	[],
	[enable_debug=no]
	)
	AC_MSG_RESULT([$enable_debug])

	if test "x$enable_debug" = "xno"; then
	debugflags=""
	else
	debugflags="-g"
	fi

	dnl -Wfloat-equal -fvisibility-inlines-hidden -Wctor-dtor-privacy -Weffc++
	if test -n "$GCC"; then
	warnflags="-ansi -pedantic -Wall -Wextra -Wno-overloaded-virtual"

	if test "x$enable_debug" = "xslow"; then
	debugflags="$debugflags -fno-inline"
	AM_CPPFLAGS="$AM_CPPFLAGS -D_GLIBCXX_DEBUG"
	fi
	fi

	dnl do an actual capability check on ld instead of this workaround
	case "${host}" in
	-darwin)
	;;
	*)
	AM_LDFLAGS="-Wl,--enable-new-dtags"
	;;
	esac

	AC_SUBST(AM_CPPFLAGS)
	AC_SUBST(AM_CFLAGS, ["$warnflags $debugflags"])
	AC_SUBST(AM_CXXFLAGS,["$warnflags $debugflags"])
	AC_SUBST(AM_FCFLAGS, ["$debugflags"])
	AC_SUBST(AM_LDFLAGS)
	])

	AC_DEFUN([HERWIG_ENABLE_MODELS],
	[
	AC_MSG_CHECKING([if BSM models should be built])

	AC_ARG_ENABLE(models,
	AC_HELP_STRING([--disable-models],[Turn off compilation of BSM models.]),
	[],
	[enable_models=yes]
	)
	AC_MSG_RESULT([$enable_models])

	LOAD_BSM=""
	if test "$enable_models" = "yes"; then
	LOAD_BSM="read BSMlibs.in"
	fi
	AC_SUBST(LOAD_BSM)

	AM_CONDITIONAL(WANT_BSM,[test "$enable_models" = "yes"])
	])

	AC_DEFUN([HERWIG_OVERVIEW],
	[
	FCSTRING=`$FC --version \| head -1`
	CXXSTRING=`$CXX --version \| head -1`
	CCSTRING=`$CC --version \| head -1`
	if test "x$PYTHON" != "x:"
	then
	python_was_found="yes, using Python $PYTHON_VERSION"
	else
	python_was_found="no, requires Python >= 2.6"
	fi
	cat << _HW_EOF_ > config.herwig
	*****************************************************
	*** $PACKAGE_STRING configuration summary
	*** Please include this information in bug reports!
	***--------------------------------------------------
	*** Prefix: $prefix
	***
	*** BSM models: $enable_models
	*** UFO converter: ${python_was_found}
	***
	*** Herwig debug mode: $enable_debug
	***
	*** ThePEG: $with_thepeg
	*** ThePEG headers: $with_thepeg_headers
	***
	*** GoSam: $with_gosam
	*** GoSam-Contrib: $with_gosam_contrib
	*** MadGraph: $with_madgraph
	*** njet: $with_njet
	*** OpenLoops: $with_openloops
	*** VBFNLO: $with_vbfnlo
	***
	*** GSL: $with_gsl
	*** boost: ${BOOST_CPPFLAGS:-system}
	*** Fastjet: ${fjconfig}
	***
	*** Host: $host
	*** CC: $CCSTRING
	*** CXX: $CXXSTRING
	*** FC: $FCSTRING
	***
	*** CXXFLAGS: $CXXFLAGS
	*****************************************************
	_HW_EOF_
	])

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