## Process this file with autoconf to produce a configure script.

AC_PREREQ(2.59)
AC_INIT([Rivet],[1.8.0],[rivet@projects.hepforge.org],[Rivet])
if test "$prefix" = "$PWD"; then
  AC_MSG_ERROR([Installation into the build directory is not supported: use a different --prefix argument])
fi
AC_CONFIG_SRCDIR([src/Core/Analysis.cc])
AC_CONFIG_HEADERS([include/Rivet/Config/DummyConfig.hh include/Rivet/Config/RivetConfig.hh include/Rivet/Config/BuildOptions.hh])
AM_INIT_AUTOMAKE(dist-bzip2)
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
AC_CONFIG_MACRO_DIR([m4])
AC_SUBST(LT_OBJDIR)

## Package-specific #defines
AC_DEFINE_UNQUOTED(RIVET_VERSION, "$PACKAGE_VERSION", "Rivet version string")
AC_DEFINE_UNQUOTED(RIVET_NAME, "$PACKAGE_NAME", "Rivet name string")
AC_DEFINE_UNQUOTED(RIVET_STRING, "$PACKAGE_STRING", "Rivet name and version string")
AC_DEFINE_UNQUOTED(RIVET_TARNAME, "$PACKAGE_TARNAME", "Rivet short name string")
AC_DEFINE_UNQUOTED(RIVET_BUGREPORT, "$PACKAGE_BUGREPORT", "Rivet contact email address")

## Set library version info code
## Set for version 1.8.0
VERSIONINFOFLAGS="-version-info 11:0:0"
AC_SUBST(VERSIONINFOFLAGS)

## OS X
AC_CEDAR_OSX

## LCG platform tag
AC_LCG_TAG

## Set default compiler flags
if test "x$CXXFLAGS" == "x"; then CXXFLAGS="-O2"; fi

## Make compiler error messages more readable if gfilt is installed.
dnl AC_CEDAR_CXXFILTER

## Checks for programs.
AC_LANG(C++)
AC_PROG_CXX
AC_PROG_INSTALL
AC_PROG_LN_S
AC_DISABLE_STATIC
AC_LIBTOOL_DLOPEN
AC_PROG_LIBTOOL

## GNU Scientific Library
AC_SEARCH_GSL
AC_CEDAR_HEADERS([gsl], , , [AC_MSG_ERROR([GSL (GNU Scientific Library) is required])])
oldCPPFLAGS=$CPPFLAGS
CPPFLAGS="$CPPFLAGS -I$GSLINCPATH"
AC_CHECK_HEADER([gsl/gsl_vector.h], [], [AC_MSG_ERROR([GSL vectors not found.])])
CPPFLAGS=$oldCPPFLAGS

## Boost C++ header library
AC_CEDAR_HEADERS([Boost], , , [AC_MSG_ERROR([Boost is required])])
oldCPPFLAGS=$CPPFLAGS
CPPFLAGS="$CPPFLAGS -I$BOOSTINCPATH"
BOOSTERRMSG="You need at least version 1.34.0 of Boost for this installation."
BOOSTERRMSG="$BOOSTERRMSG If you want to use Boost from a non-standard location,"
BOOSTERRMSG="$BOOSTERRMSG please specify '--with-boost-incpath=/path/to/boost_1_35/include'"
BOOSTERRMSG="$BOOSTERRMSG as option to the configure script or run the rivet-bootstrap script "
BOOSTERRMSG="$BOOSTERRMSG with the --install-boost option, or --boost=/path/to/boost"
AC_CHECK_HEADER([boost/foreach.hpp], [], [AC_MSG_ERROR([Boost foreach not found. $BOOSTERRMSG])])
AC_CHECK_HEADER([boost/smart_ptr.hpp], [], [AC_MSG_ERROR([Boost smart_ptr not found. $BOOSTERRMSG])])
AC_CHECK_HEADER([boost/lexical_cast.hpp], [], [AC_MSG_ERROR([Boost lexical_cast not found. $BOOSTERRMSG])])
AC_CHECK_HEADER([boost/assign.hpp], [], [AC_MSG_ERROR([Boost assign not found. $BOOSTERRMSG])])
AC_CHECK_HEADER([boost/random.hpp], [], [AC_MSG_ERROR([Boost random numbers not found. $BOOSTERRMSG])])
CPPFLAGS=$oldCPPFLAGS


## HepMC library
AC_CEDAR_LIBRARYANDHEADERS([HepMC], , , [AC_MSG_ERROR([HepMC is required])])
oldCPPFLAGS=$CPPFLAGS
CPPFLAGS="$CPPFLAGS -I$HEPMCINCPATH"
if test -e "$HEPMCINCPATH/HepMC/HepMCDefs.h"; then
  AC_LANG_CONFTEST([AC_LANG_SOURCE([#include <iostream>
#include "HepMC/HepMCDefs.h"
int main() { std::cout << HEPMC_VERSION << std::endl; return 0; }])])
else
  AC_LANG_CONFTEST([AC_LANG_SOURCE([#include <iostream>
#include "HepMC/defs.h"
int main() { std::cout << VERSION << std::endl; return 0; }])])
fi
if test -f conftest.cc; then
  $CXX $CPPFLAGS conftest.cc -o conftest 2>&1 1>&5
elif test -f conftest.C; then
  $CXX $CPPFLAGS conftest.C -o conftest 2>&1 1>&5
else
  $CXX $CPPFLAGS conftest.cpp -o conftest 2>&1 1>&5
fi
hepmc_version=`./conftest`
if test x$hepmc_version != x; then
  let hepmc_major=`echo "$hepmc_version" | cut -d. -f1`
  let hepmc_minor=`echo "$hepmc_version" | cut -d. -f2`
fi
rm -f conftest conftest.cpp conftest.cc conftest.C
HEPMC_VERSION=$hepmc_major$hepmc_minor
AC_MSG_NOTICE([HepMC version is $hepmc_version -> $HEPMC_VERSION])
AC_SUBST(HEPMC_VERSION)
CPPFLAGS=$oldCPPFLAGS


## FastJet library
AC_CEDAR_LIBRARYANDHEADERS([fastjet], , , [AC_MSG_ERROR([FastJet is required])])
AC_PATH_PROG(FJCONFIG, fastjet-config, [], $FASTJETPATH/bin:$PATH)
if test -f "$FJCONFIG"; then
  AC_MSG_CHECKING([FastJet version using fastjet-config])
  fjversion=$($FJCONFIG --version)
  AC_MSG_RESULT([$fjversion])

  fjmajor=$(echo $fjversion | cut -f1 -d.)
  fjminor=$(echo $fjversion | cut -f2 -d.)
  fjmicro=$(echo $fjversion | cut -f3 -d.)
  if test "$fjmajor" -lt 2 \
    -o "$fjmajor" -eq 2 -a "$fjminor" -lt 4 \
    -o "$fjmajor" -eq 2 -a "$fjminor" -eq 4 -a "$fjmicro" -lt 2; then
    AC_MSG_ERROR([FastJet version 2.4.2 or later is required])
  fi
  FASTJETCONFIGLIBADD="$($FJCONFIG --plugins --shared --libs | sed 's/\-\-rpath/-rpath/g') -lsiscone_spherical -lsiscone"
  #FASTJETLIBPATH="$($FJCONFIG --libs | sed 's/.*\-L\([^\ ]\+\).*/\1/')"
else
  FASTJETCONFIGLIBADD="-L$FASTJETLIBPATH -l$FASTJETLIBNAME"
  FASTJETCONFIGLIBADD="$FASTJETCONFIGLIBADD -lSISConePlugin -lsiscone -lsiscone_spherical"
  FASTJETCONFIGLIBADD="$FASTJETCONFIGLIBADD -lCDFConesPlugin -lD0RunIIConePlugin -lNestedDefsPlugin"
  FASTJETCONFIGLIBADD="$FASTJETCONFIGLIBADD -lTrackJetPlugin -lATLASConePlugin -lCMSIterativeConePlugin"
  FASTJETCONFIGLIBADD="$FASTJETCONFIGLIBADD -lEECambridgePlugin -lJadePlugin"
fi;
AC_MSG_NOTICE([FastJet LIBADD = $FASTJETCONFIGLIBADD])
AC_SUBST(FASTJETCONFIGLIBADD)
# Check for FastJet headers that require the --enable-all(cxx)plugins option
FASTJET_ERRMSG="Required FastJet plugin headers were not found: did you build FastJet with the --enable-allcxxplugins option?"
oldCPPFLAGS=$CPPFLAGS
CPPFLAGS="$CPPFLAGS -I$FASTJETINCPATH"
AC_CHECK_HEADER([fastjet/D0RunIIConePlugin.hh], [], [AC_MSG_ERROR([$FASTJET_ERRMSG])])
AC_CHECK_HEADER([fastjet/TrackJetPlugin.hh], [], [AC_MSG_ERROR([$FASTJET_ERRMSG])])
CPPFLAGS=$oldCPPFLAGS


## Build Doxygen if possible
AC_ARG_ENABLE([doxygen],
  [AC_HELP_STRING(--disable-doxygen, [don't try to make Doxygen documentation])],
  [], [enable_doxygen=yes])
if test x$enable_doxygen = xyes; then
   AC_PATH_PROG(DOXYGEN, doxygen)
fi
AM_CONDITIONAL(WITH_DOXYGEN, [test x$DOXYGEN != x])


## Disable build/install of standard analyses
AC_ARG_ENABLE([analyses],
  [AC_HELP_STRING(--disable-analyses, [don't try to build or install standard analyses])],
  [], [enable_analyses=yes])
if test x$enable_analyses != xyes; then
   AC_MSG_WARN([Not building standard Rivet analyses, by request])
fi
AM_CONDITIONAL(ENABLE_ANALYSES, [test x$enable_analyses = xyes])


## Enable build/install of unvalidated analyses
AC_ARG_ENABLE([unvalidated],
  [AC_HELP_STRING(--enable-unvalidated, [build and install unvalidated analyses])],
  [], [enable_unvalidated=no])
if test x$enable_unvalidated = xyes; then
   AC_MSG_WARN([Building unvalidated Rivet analyses, by request])
else
   AC_MSG_NOTICE([Not building unvalidated Rivet analyses])
fi
AM_CONDITIONAL(ENABLE_UNVALIDATED, [test x$enable_unvalidated = xyes])


## Disable build/install of validated-but-preliminary analyses
AC_ARG_ENABLE([preliminary],
  [AC_HELP_STRING(--disable-preliminary, [build and install validated-but-preliminary analyses])],
  [], [enable_preliminary=yes])
if test x$enable_preliminary = xyes; then
   AC_MSG_NOTICE([Building preliminary Rivet analyses])
else
   AC_MSG_NOTICE([Not building preliminary Rivet analyses, by request])
fi
AM_CONDITIONAL(ENABLE_PRELIMINARY, [test x$enable_preliminary = xyes])


## Disable build/install of now-obsolete preliminary analyses
AC_ARG_ENABLE([obsolete],
  [AC_HELP_STRING(--disable-obsolete, [build and install now-obsolete analyses])],
  [], [enable_obsolete=$enable_preliminary])
if test x$enable_obsolete = xyes; then
   AC_MSG_NOTICE([Building obsolete Rivet analyses])
else
   AC_MSG_NOTICE([Not building obsolete Rivet analyses, by request])
fi
AM_CONDITIONAL(ENABLE_OBSOLETE, [test x$enable_obsolete = xyes])


## Build LaTeX docs if possible...
AC_PATH_PROG(PDFLATEX, pdflatex)
AM_CONDITIONAL(WITH_PDFLATEX, [test x$PDFLATEX != x])
## ... unless told otherwise!
AC_ARG_ENABLE([pdfmanual],
  [AC_HELP_STRING(--disable-pdfmanual, [don't try to build or install the PDF manual])],
  [], [enable_pdfmanual=yes])
if test x$enable_pdfmanual != xyes; then
   AC_MSG_WARN([Not building Rivet PDF manual, by request])
fi
AM_CONDITIONAL(ENABLE_PDFMANUAL, [test x$enable_pdfmanual = xyes])


## Build asciidoc docs if possible
AC_PATH_PROG(ASCIIDOC, asciidoc)
AM_CONDITIONAL(WITH_ASCIIDOC, [test x$ASCIIDOC != x])


## Test to see if we have to install libyaml-cpp
AC_CEDAR_LIBRARYANDHEADERS([yaml-cpp], , , [AC_MSG_NOTICE([Rivet will install the yaml-cpp library])])


## Python extension
AC_ARG_ENABLE(pyext, [AC_HELP_STRING(--disable-pyext,
  [don't build Python module (default=build)])],
  [], [enable_pyext=yes])
AZ_PYTHON_DEFAULT
## Basic Python checks
if test x$enable_pyext == xyes; then
  AZ_PYTHON_PATH
  AZ_PYTHON_VERSION_ENSURE([2.4])
  PYTHON_VERSION=`$PYTHON -c "import sys; print '.'.join(map(str, sys.version_info@<:@:2@:>@));"`
  AC_SUBST(PYTHON_VERSION)
  RIVET_PYTHONPATH=`$PYTHON -c "import distutils.sysconfig; print distutils.sysconfig.get_python_lib(prefix='$prefix', plat_specific=True);"`
  AC_SUBST(RIVET_PYTHONPATH)
  ## Test for Python header
  if test -x "$PYTHON"; then
    AC_MSG_CHECKING([for Python include path])
    python_incpath=`$PYTHON -c "import distutils.sysconfig; print distutils.sysconfig.get_python_inc();"`
    AC_MSG_RESULT([$python_incpath])
    python_header="$python_incpath/Python.h"
    if test -z "$python_incpath"; then
      AC_MSG_ERROR([Can't build Python extension since include directory cannot be determined from distutils])
      enable_pyext=no
    elif test ! -e "$python_header"; then
      AC_MSG_ERROR([Can't build Python extension since header file $python_header cannot be found])
      enable_pyext=no
    fi
  else
    AC_MSG_ERROR([Can't build Python extension since python can't be found])
    enable_pyext=no
  fi
fi
## SWIG checks
if test x$enable_pyext == xyes; then
  AC_PROG_SWIG
  if test x$SWIG == x; then
    AC_MSG_ERROR([Can't build Python extension since swig could not be found])
    enable_pyext=no
  else
    ## Test that SWIG makes a compilable source file...
    ## cf. g++ 4.x requires that string literal is "_const_ char*"
    cat > conftest.i <<EOL
%module conftest
%{
  void foo();
%}
void foo();
EOL
    AC_MSG_CHECKING([if $SWIG can make a Python function wrapper])
    flag_ok=yes
    stat_string=`$SWIG -c++ -python conftest.i 2>&1 1>&5` ; test -z "$stat_string" || flag_ok=no
    AC_MSG_RESULT([$flag_ok])
    if test x$flag_ok != xyes; then
      AC_MSG_ERROR([Can't build Python extension since $SWIG is not able to make a Python wrapper])
      enable_pyext=no
    else
      swig_compiler=$CXX
      AC_CEDAR_CHECKCXXFLAG([-Wno-format], [AC_MSG_NOTICE([adding -Wno-format to swig compilation test]);
        swig_compiler="$swig_compiler -Wno-format"])
      AC_MSG_CHECKING([if $SWIG is compatible with the $CXX compiler])
      flag_ok=yes
      if test x$flag_ok == xyes; then
        stat_string=`$swig_compiler -c conftest_wrap.cxx $CPPFLAGS $CXXFLAGS -I$python_incpath 2>&1 1>&5` ; test -z "$stat_string" || flag_ok=no
      fi
      AC_MSG_RESULT([$flag_ok])
      if test x$flag_ok != xyes; then
        AC_MSG_ERROR([Can't build Python extension since $SWIG is not compatible with $CXX. Get a newer SWIG version!])
        enable_pyext=no
      fi
    fi
  fi
  rm -rf conftest*
fi
## Finish
if test x$enable_pyext == xyes; then
  AC_MSG_NOTICE([All Python build checks successful: 'rivet' Python extension will be built])
fi
AM_CONDITIONAL(ENABLE_PYEXT, [test x$enable_pyext == xyes])


## Set default build flags
AM_CPPFLAGS="-I\$(top_srcdir)/include -I\$(top_builddir)/include"
#AM_CPPFLAGS="$AM_CPPFLAGS -I\$(top_srcdir)/include/eigen2"
AM_CPPFLAGS="$AM_CPPFLAGS \$(GSL_CPPFLAGS)"
AM_CPPFLAGS="$AM_CPPFLAGS -I\$(BOOSTINCPATH) \$(BOOST_CPPFLAGS)"
AM_CPPFLAGS="$AM_CPPFLAGS -I\$(HEPMCINCPATH)"
AM_CPPFLAGS="$AM_CPPFLAGS -I\$(FASTJETINCPATH)"
AC_CEDAR_CHECKCXXFLAG([-pedantic], [AM_CXXFLAGS="$AM_CXXFLAGS -pedantic "])
AC_CEDAR_CHECKCXXFLAG([-ansi], [AM_CXXFLAGS="$AM_CXXFLAGS -ansi "])
AC_CEDAR_CHECKCXXFLAG([-Wall], [AM_CXXFLAGS="$AM_CXXFLAGS -Wall "])
AC_CEDAR_CHECKCXXFLAG([-Wno-long-long], [AM_CXXFLAGS="$AM_CXXFLAGS -Wno-long-long "])


## Debug flag (default=none)
AC_ARG_ENABLE([debug], [AC_HELP_STRING(--enable-debug,
  [build with debugging symbols  @<:@default=no@:>@])], [], [enable_debug=no])
if test x$enable_debug == xyes; then
  AC_CEDAR_CHECKCXXFLAG([-g], [AM_CXXFLAGS="$AM_CXXFLAGS -g "])
fi


## Extra warnings flag (default=none)
AC_ARG_ENABLE([extra-warnings], [AC_HELP_STRING(--enable-extra-warnings,
  [build with extra compiler warnings (recommended for developers)  @<:@default=no@:>@])], [], [enable_extra_warnings=no])
if test x$enable_extra_warnings == xyes; then
   AC_CEDAR_CHECKCXXFLAG([-Wextra], [AM_CXXFLAGS="$AM_CXXFLAGS -Wextra "])
fi


AC_SUBST(AM_CPPFLAGS)
AC_SUBST(AM_CXXFLAGS)

AC_EMPTY_SUBST
AC_CONFIG_FILES(include/Makefile include/Rivet/Makefile)
AC_CONFIG_FILES(src/Makefile)
AC_CONFIG_FILES(src/Core/Makefile)
AC_CONFIG_FILES(src/Tools/Makefile src/Tools/yaml-cpp/Makefile)
AC_CONFIG_FILES(src/Projections/Makefile)
AC_CONFIG_FILES(src/Analyses/Makefile)
AC_CONFIG_FILES(test/Makefile)
AC_CONFIG_FILES(pyext/Makefile pyext/rivet/Makefile pyext/setup.py)
AC_CONFIG_FILES(data/Makefile data/refdata/Makefile data/anainfo/Makefile data/plotinfo/Makefile data/texmf/Makefile)
AC_CONFIG_FILES(doc/Makefile)
AC_CONFIG_FILES(doc/rivetversion.sty)
AC_CONFIG_FILES(autopackage/default.apspec)
AC_CONFIG_FILES(autopackage/data.apspec)
AC_CONFIG_FILES(bin/Makefile bin/rivet-config bin/rivet-buildplugin)
AC_CONFIG_FILES(Makefile Doxyfile)
AC_CONFIG_FILES(rivetenv.sh rivetenv.csh)

AC_OUTPUT

if test x$enable_pyrivet == xyes; then
   cat <<EOF

************************************************************
RIVET CONFIGURED!

Now build and install (to the $prefix tree) with e.g.
make -j2 && make -j2 install

To use Rivet, we recommend reading HepMC files from a file
or pipe (the latter may be made with mkfifo) using the
'rivet' executable.

For a more pleasant command line experience, you can include
the data/rivet-completion file into your .bashrc file,
or your bash_completion.d directory if you have one.

The rivetenv.*sh files will not be installed, but can help you
to set up a Rivet runtime environment in future.
************************************************************
EOF
fi