thepeg.m4
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	# Check for ThePEG.
	AC_DEFUN([THEPEG_CHECK_THEPEG],
	[THEPEGBUILD="no"

	AC_MSG_CHECKING([if THEPEGPATH is set])
	if test -z "$THEPEGPATH"; then
	if test -f "../ThePEG/Config/config.h"; then
	THEPEGPATH="\$(top_builddir)/../ThePEG"
	THEPEGBUILD="yes"
	AC_MSG_RESULT([no (using ../ThePEG)])
	AM_CPPFLAGS="-I\$(top_builddir)/include -I\$(top_builddir)/../ThePEG/include "
	SETUPTHEPEG="$THEPEGPATH/src/setupThePEG -L $THEPEGPATH/lib"
	RUNTHEPEG="$THEPEGPATH/src/runThePEG -L $THEPEGPATH/lib"
	THEPEGDOC="\$(top_builddir)/../ThePEG/Doc"
	THEPEGLIB="\$(top_builddir)/../ThePEG/lib"
	else
	if test "x$prefix" == "xNONE"; then
	THEPEGPATH=$ac_default_prefix
	else
	THEPEGPATH=$prefix
	fi
	AC_MSG_RESULT([no (using $THEPEGPATH)])
	fi
	else
	AC_MSG_RESULT([yes ($THEPEGPATH)])
	fi

	if test "$THEPEGBUILD" == "no"; then
	AM_CPPFLAGS="-I\$(top_builddir)/include -I$THEPEGPATH/include "
	SETUPTHEPEG="$THEPEGPATH/bin/setupThePEG"
	RUNTHEPEG="$THEPEGPATH/bin/runThePEG"
	THEPEGDOC="$THEPEGPATH/share/ThePEG/Doc"
	THEPEGLIB="$THEPEGPATH/lib/ThePEG"
	AC_MSG_CHECKING([if the installed ThePEG works])
	if test -x $SETUPTHEPEG && $SETUPTHEPEG /dev/null; then
	AC_MSG_RESULT(yes)
	else
	AC_MSG_RESULT(no)
	AC_MSG_ERROR(ThePEG must be installed and THEPEGPATH set properly.)
	fi
	fi
	AC_ARG_VAR(THEPEGPATH,[The path to where ThePEG is installed. Default is $prefix unless we are working in a sister of the build directory of ThePEG.])

	pkglibdir="\$(libdir)/ThePEG"
	AC_SUBST(pkglibdir)
	AC_SUBST(THEPEGPATH)
	AC_SUBST(THEPEGINCLUDE)
	AC_SUBST(THEPEGDOC)
	AC_SUBST(THEPEGLIB)
	AC_SUBST(SETUPTHEPEG)
	AC_SUBST(RUNTHEPEG)
	AC_SUBST(AM_CPPFLAGS)
	])

	# Search for ThePEG in standard places.
	AC_DEFUN([THEPEG_SEARCH_THEPEG],
	[THEPEGBUILD="no"

	AC_MSG_CHECKING([if THEPEGPATH is set])
	if test -z "$THEPEGPATH"; then
	if test -f "../ThePEG/Config/config.h"; then
	THEPEGPATH="\$(top_builddir)/../ThePEG"
	THEPEGBUILD="yes"
	AC_MSG_RESULT([no (found ../ThePEG)])
	AM_CPPFLAGS="-I\$(top_builddir)/include -I\$(top_builddir)/../ThePEG/include "
	SETUPTHEPEG="$THEPEGPATH/src/setupThePEG -L $THEPEGPATH/lib"
	RUNTHEPEG="$THEPEGPATH/src/runThePEG -L $THEPEGPATH/lib"
	THEPEGDOC="\$(top_builddir)/../ThePEG/Doc"
	THEPEGLIB="\$(top_builddir)/../ThePEG/lib"
	else
	for dirbase in / /usr $ac_default_prefix $prefix; do
	if test -f $dirbase/include/ThePEG/Config/config.h; then
	THEPEGPATH=$dirbase
	fi
	done
	if test -z "$THEPEGPATH"; then
	AC_MSG_RESULT([no])
	AC_MSG_ERROR(Could not find a valid ThePEG installation or build directory)
	else
	AC_MSG_RESULT([no (found $THEPEGPATH)])
	fi
	fi
	else
	AC_MSG_RESULT([yes ($THEPEGPATH)])
	fi

	if test "$THEPEGBUILD" == "no"; then
	AM_CPPFLAGS="-I\$(top_builddir)/include -I$THEPEGPATH/include "
	SETUPTHEPEG="$THEPEGPATH/bin/setupThePEG"
	RUNTHEPEG="$THEPEGPATH/bin/runThePEG"
	THEPEGDOC="$THEPEGPATH/share/ThePEG/Doc"
	THEPEGLIB="$THEPEGPATH/lib/ThePEG"
	AC_MSG_CHECKING([if the installed ThePEG works])
	if test -x $SETUPTHEPEG && $SETUPTHEPEG /dev/null; then
	AC_MSG_RESULT(yes)
	else
	AC_MSG_RESULT(no)
	AC_MSG_ERROR(ThePEG must be installed and THEPEGPATH set properly.)
	fi
	fi
	AC_ARG_VAR(THEPEGPATH,[The path to where ThePEG is installed. Default is $prefix unless we are working in a sister of the build directory of ThePEG.])

	pkglibdir="\$(libdir)/ThePEG"
	AC_SUBST(pkglibdir)
	AC_SUBST(THEPEGPATH)
	AC_SUBST(THEPEGINCLUDE)
	AC_SUBST(THEPEGDOC)
	AC_SUBST(THEPEGLIB)
	AC_SUBST(SETUPTHEPEG)
	AC_SUBST(RUNTHEPEG)
	AC_SUBST(AM_CPPFLAGS)
	])

	AC_DEFUN([THEPEG_EMPTY_SUBST],
	[EMPTY=""
	AC_SUBST(EMPTY)
	])

	AC_DEFUN([THEPEG_SEARCH_PREFIXDIR_FILES],
	[AC_MSG_CHECKING([if $1 and $2 is set])
	if test -z "$$1"; then
	for dirbase in / /usr $ac_default_prefix $prefix; do
	if test -z "$$2"; then
	for filename in $4; do
	if test -f $dirbase/$3/$filename; then
	$1=$dirbase/$3
	$2=$filename
	fi
	done
	else
	if test -f $dirbase/$3/$$2; then
	$1=$dirbase/$3
	fi
	fi
	done
	if test -z "$$1" -o -z "$$2"; then
	AC_MSG_ERROR(no. Could not guess appropriate value for $1 and $2)
	else
	AC_MSG_RESULT([no (found $$1 and $$2)])
	fi
	else
	if test -z "$$2"; then
	for filename in $4; do
	if test -f $$1/$filename; then
	$2=$filename
	fi
	done
	AC_MSG_RESULT([no (found $$1 and $$2)])
	else
	if test -f $$1/$$2; then
	AC_MSG_RESULT([yes ($$1 and $$2)])
	else
	AC_MSG_ERROR(no. Could not guess appropriate value for $1 and $2)
	fi
	fi
	fi
	AC_ARG_VAR($1,[$5])
	AC_ARG_VAR($2,[$6])
	])

	AC_DEFUN([THEPEG_CHECK_PREFIXDIR],
	[AC_MSG_CHECKING([if $1 is set])
	if test -z "$$1"; then
	if test -d $prefix/$2; then
	$1=$prefix/$2
	elif test -d $ac_default_prefix/$2; then
	$1=$ac_default_prefix/$2
	elif test -d /usr/$2; then
	$1=/usr/$2
	elif test -d /$2; then
	$1=/$2
	else
	AC_MSG_ERROR(no. Could not guess appropriate value for $1)
	fi
	AC_MSG_RESULT([no (using $$1)])
	else
	AC_MSG_RESULT([yes ($$1)])
	fi
	AC_ARG_VAR($1,[$3])
	])


	AC_DEFUN([THEPEG_CHECK_ENVDEFAULT],
	[AC_MSG_CHECKING([if $1 is set])
	if test -z "$$1"; then
	$1="$2"
	AC_MSG_RESULT([no (using $$1)])
	else
	AC_MSG_RESULT([yes ($$1)])
	fi
	AC_ARG_VAR($1,[$3])
	])

	AC_DEFUN([THEPEG_DEFINE_ENVDEFAULT],
	[AC_MSG_CHECKING([if $2 is set])
	if test -z "$$2"; then
	$2="$3"
	AC_MSG_RESULT([no (using $$2)])
	else
	AC_MSG_RESULT([yes ($$2)])
	fi
	AC_ARG_VAR($2,[$4])
	AC_DEFINE_UNQUOTED($1,"$$2",[$4])
	])

	AC_DEFUN([THEPEG_CHECK_EXPM1],
	[echo $ECHO_N "checking for expm1... $ECHO_C" 1>&6
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <cmath>
	]], [[expm1(1.0);
	]])],[AC_DEFINE(ThePEG_HAS_EXPM1,1,define if expm1 is available)
	echo "${ECHO_T}yes" 1>&6
	],[echo "${ECHO_T}no" 1>&6])])

	AC_DEFUN([THEPEG_CHECK_LOG1P],
	[echo $ECHO_N "checking for log1p... $ECHO_C" 1>&6
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <cmath>
	]], [[log1p(1.0);
	]])],[AC_DEFINE(ThePEG_HAS_LOG1P,1,define if log1p is available)
	echo "${ECHO_T}yes" 1>&6
	],[echo "${ECHO_T}no" 1>&6])])

	AC_DEFUN([THEPEG_CHECK_DLOPEN],
	[echo $ECHO_N "checking for dlopen... $ECHO_C" 1>&6
	# do this with libtool!
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <dlfcn.h>
	]], [[dlopen("", 1);
	]])],[AC_DEFINE(ThePEG_HAS_DLOPEN,1,define if dlopen is available)
	echo "${ECHO_T}yes" 1>&6
	],[echo "${ECHO_T}no" 1>&6])])

	AC_DEFUN([THEPEG_CHECK_SSTREAM],
	[echo $ECHO_N "checking for <sstream>... $ECHO_C" 1>&6
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sstream>
	]], [[std::ostringstream os;
	]])],[AC_DEFINE(ThePEG_HAS_SSTREAM,1,define if sstream is available)
	echo "${ECHO_T}yes" 1>&6
	],[echo "${ECHO_T}no" 1>&6])])

	AC_DEFUN([THEPEG_CHECK_FPUCONTROL],
	[
	AC_REQUIRE([AX_COMPILER_VENDOR])
	echo $ECHO_N "checking for <fpu_control>... $ECHO_C" 1>&6
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <fpu_control.h>
	]], [[fpu_control_t cw; _FPU_GETCW(cw); cw &= ~(_FPU_MASK_IM\|_FPU_MASK_DM\|_FPU_MASK_ZM\|_FPU_MASK_OM); _FPU_SETCW(cw);
	]])],[
	if test "${ax_cv_cxx_compiler_vendor}" == "clang"; then
	echo "${ECHO_T}not useable with clang/llvm" 1>&6
	else
	AC_DEFINE(ThePEG_HAS_FPU_CONTROL,1,define if fpucontrol is available)
	echo "${ECHO_T}yes" 1>&6
	fi
	],[echo "${ECHO_T}no" 1>&6])])

	AC_DEFUN([THEPEG_CHECK_FENV],
	[
	AC_REQUIRE([AX_COMPILER_VENDOR])
	echo $ECHO_N "checking for <fenv.h>... $ECHO_C" 1>&6
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <fenv.h>
	]], [[feenableexcept(FE_DIVBYZERO\|FE_OVERFLOW\|FE_INVALID);]])],[
	if test "${ax_cv_cxx_compiler_vendor}" == "clang"; then
	echo "${ECHO_T}not useable with clang/llvm" 1>&6
	else
	AC_DEFINE(ThePEG_HAS_FENV,1,define if fenv is available)
	echo "${ECHO_T}yes" 1>&6
	fi
	],[echo "${ECHO_T}no" 1>&6])])

	AC_DEFUN([THEPEG_ADD_THEPEG_PATH],
	[if test "$THEPEGBUILD" == "yes"; then
	if test -f "../$2/Config/config.h"; then
	$1="\$(top_builddir)/../$2/lib"
	SETUPTHEPEG="$SETUPTHEPEG -L\$(top_builddir)/../$2/lib"
	RUNTHEPEG="$RUNTHEPEG -L\$(top_builddir)/../$2/lib"
	AM_CPPFLAGS="$AM_CPPFLAGS -I\$(top_builddir)/../$2/include"
	fi
	else
	$1="$THEPEGLIB"
	fi
	AC_SUBST($1)
	])

	AC_DEFUN([THEPEG_HAS_JAVA],
	[ hasjava=yes
	AC_PATH_PROG(JAVAC, javac)
	AC_PATH_PROG(JAVA, java)
	AC_PATH_PROG(JAR, jar)
	if test -z "$JAR" -o -z "$JAVA" -o -z "$JAVAC"; then hasjava=no; else
	AC_MSG_CHECKING([if java works])
	echo 'public class conftest { public static void main(String[[]]arg){}}' > conftest.java
	$JAVAC -source $1 conftest.java 1>&5 2>&5
	if test $? -ne 0; then hasjava=no; fi
	echo "Main-Class: conftest" > conftest.manifest
	$JAR cmf conftest.manifest conftest.jar conftest.class 1>&5 2>&5
	if test $? -ne 0; then hasjava=no; fi
	$JAVA -jar conftest.jar 1>&5 2>&5
	if test $? -ne 0; then hasjava=no; fi
	rm -f conftest.java conftest.err conftest.class conftest.manifest conftest.jar
	fi
	if test "x$hasjava" != "xno"; then
	AC_MSG_RESULT([yes])
	$2
	else
	AC_MSG_RESULT([no])
	$3
	fi
	])

	AC_DEFUN([THEPEG_LIBTOOL_VERSION_INFO],
	[ LIBTOOLVERSIONINFO="-version-info $1:$2:$3"
	AC_SUBST(LIBTOOLVERSIONINFO)])

	AC_DEFUN([THEPEG_CHECK_GSL],
	[
	AC_MSG_CHECKING([for gsl location])
	GSLINCLUDE=""
	GSLLIBS=""

	AC_ARG_WITH(gsl,
	AC_HELP_STRING([--with-gsl=path],[location of gsl installation. Default: system lib]),
	[],
	[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,sqrt)
	AC_CHECK_LIB(gslcblas,cblas_srot)
	AC_CHECK_LIB(gsl,gsl_ran_poisson,[],
	[
	AC_MSG_ERROR([Cannot find libgsl. Please install the GNU scientific library.])
	]
	)
	GSLLIBS="$LIBS"
	LIBS=$oldlibs
	GSLPATH="$with_gsl"
	else
	if test "`uname -m`" = "x86_64" -a -e "$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$with_gsl/lib64 -lgsl -lgslcblas"
	GSLINCLUDE="-I$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$with_gsl/lib -lgsl -lgslcblas"
	GSLINCLUDE="-I$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

	dnl AM_CONDITIONAL(HAVE_GSL,[test "x$with_HepMC" != "xno"])
	AC_SUBST(GSLINCLUDE)
	AC_SUBST(GSLLIBS)
	AC_SUBST(GSLPATH)
	])

	AC_DEFUN([THEPEG_BOOST_UNIT_TEST],
	[
	AC_REQUIRE([BOOST_REQUIRE])
	if test "x$BOOST_NOT_FOUND" = "xtrue"; then
	BOOSTMESSAGE="Boost not found."
	AC_SUBST([BOOST_ACTIVATE_UNIT_TESTS],[false])
	elif test -z "$BOOST_UNIT_TEST_FRAMEWORK_LDPATH"; then
	BOOSTMESSAGE="Boost unit test libs not found."
	AC_SUBST([BOOST_ACTIVATE_UNIT_TESTS],[false])
	AC_SUBST([BOOST_NOT_FOUND],[false])
	else
	BOOSTMESSAGE="$BOOST_UNIT_TEST_FRAMEWORK_LDPATH"
	AC_SUBST([BOOST_ACTIVATE_UNIT_TESTS],[true])
	AC_SUBST([BOOST_NOT_FOUND],[false])
	fi
	AC_SUBST(BOOSTMESSAGE)
	AM_CONDITIONAL([COND_BOOSTTEST], [test "x$BOOST_ACTIVATE_UNIT_TESTS" = "xtrue"])
	])


	AC_DEFUN([THEPEG_OVERVIEW],
	[
	CXXSTRING=`$CXX --version \| head -1`
	cat << _THEPEG_EOF_ > config.thepeg
	*****************************************************
	*** $PACKAGE_STRING configuration summary
	*** Please include this information in bug reports!
	***--------------------------------------------------
	*** Prefix: $prefix
	***
	*** Dimension checks: yes
	***
	*** GSL: $with_gsl
	***
	*** LHAPDF: $lhaconfig ($lhapdf_version) $warnlhapdf
	*** HepMC: $with_hepmc
	*** Rivet: $with_rivet
	*** FastJet: $fjconfig $warnfastjet
	***
	*** Boost Unit Tests: ${BOOSTMESSAGE}
	***
	*** Host: $host
	*** CXX: $CXXSTRING
	***
	*** CXXFLAGS: $CXXFLAGS
	*****************************************************
	_THEPEG_EOF_
	])

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