# -*- coding: utf-8; mode: tcl; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- vim:fenc=utf-8:ft=tcl:et:sw=4:ts=4:sts=4
# $Id$

PortSystem          1.0

PortGroup           active_variants 1.1
PortGroup           cmake 1.0
PortGroup           compiler_blacklist_versions 1.0
PortGroup           github 1.0
PortGroup           select 1.0
PortGroup           xcodeversion 1.0

# don't forget to update both the git tag and the version
github.setup        root-mirror root 6-06-08 v
version             [string map {- .} ${github.version}]
livecheck.version   ${github.version}
# github.setup      root-mirror root <sha>
# version           6.06.05
# livecheck.version 6-06-04

set version_major   [lindex [split ${version} .] 0]

checksums           rmd160  547484b51868ee1368779a9e0aea310eda17a6f1 \
                    sha256  ce5f6c56f353e449792ed3c8c5367e5407093261355b905e388cd8e708b41d39

name                root${version_major}
categories          science
maintainers         hep.phy.cam.ac.uk:jonesc mojca
license             LGPL-2.1+

description         ROOT is a data analysis framework from CERN
long_description    The ROOT system provides a set of frameworks with all \
                    the functionality needed to handle and analyze large amounts \
                    of data in a very efficient way.

homepage            http://root.cern.ch/
platforms           darwin

dist_subdir         root

depends_lib         port:expat \
                    port:gmp \
                    port:giflib \
                    port:jpeg \
                    port:libpng \
                    port:lzma \
                    port:ocaml \
                    port:ocaml-ctypes \
                    port:ocaml-findlib \
                    port:pcre \
                    port:tiff \
                    port:zlib \
                    port:xz
                  # port:freetype

depends_run         port:root_select

cmake.out_of_source yes

# TODO: the file ${filespath}/${name} would have to be generated on the fly instead
select.group        root
select.file         ${filespath}/${name}

# Force a compatible compiler
compiler.blacklist-append *gcc* {clang < 500} macports-clang-3.3
compiler.fallback-append  macports-clang-3.7 macports-clang-3.6 macports-clang-3.5

# port specific location
set install_prefix ${prefix}/libexec/root${version_major}

configure.args-append \
                    -Dgnuinstall=ON \
                    -Drpath=ON \
                    -DCMAKE_INSTALL_PREFIX="${install_prefix}" \
                    -DCMAKE_INSTALL_SYSCONFDIR="${install_prefix}/etc/root" \
                    -DCMAKE_INSTALL_NAME_DIR="${install_prefix}/lib/root" \
                    -Dfortran=OFF \
                    -Dbuiltin_davix=ON \
                    -Dbuiltin_freetype=ON \
                    -Dbuiltin_glew=OFF \
                    -Dbuiltin_pcre=OFF \
                    -Dbuiltin_zlib=OFF \
                    -Dbuiltin_lzma=OFF \
                    -Dbuiltin_afterimage=ON \
                    -Dfftw3=OFF \
                    -Dkrb5=OFF \
                    -Dldap=OFF \
                    -Dmysql=OFF \
                    -Dsqlite=OFF \
                    -Dodbc=OFF \
                    -Dopengl=OFF \
                    -Dpythia6=OFF \
                    -Dpythia8=OFF \
                    -Droofit=OFF \
                    -Dssl=OFF \
                    -Dxml=OFF \
                    -Dpython=OFF \
                    -Dfitsio=OFF \
                    -Dgsl_shared=OFF \
                    -Dbuiltin_gsl=OFF \
                    -Dpgsql=OFF \
                    -Ddcache=OFF \
                    -Dchirp=OFF \
                    -Dhdfs=OFF \
                    -Druby=OFF \
                    -Dminuit2=OFF \
                    -Dtmva=OFF \
                    -Dqt=OFF \
                    -Dqtgsi=OFF \
                    -Dbonjour=OFF \
                    -Dgviz=OFF \
                    -Dsoversion=OFF \
                    -Dcxx11=ON \
                    -Dcxx14=OFF \
                    -Dlibcxx=ON \
                    -Dxrootd=OFF \
                    -Dbuiltin_ftgl=ON \
                    -Dmathmore=OFF \
                    -Dgenvector=ON \
                    -Dmemstat=ON \
                    -Dunuran=ON \
                    -Dtable=ON \
                    -Dgdml=ON \
                    -Dhttp=OFF \
                    -Dvc=OFF \
                    -Dastiff=ON \
                    -Dgeocad=OFF \
                    -Dr=OFF \
                    -DPNG_LIBRARY=${prefix}/lib/libpng.dylib \
                    -DPNG_PNG_INCLUDE_DIR=${prefix}/include

platform darwin {

    # No longer compiles on OSX10.6, due to update to internal LLVM version.
    # Disable build on this platform.
    if { ${os.major} < 11 } {
        pre-fetch {
            ui_error "${name} is not supported on this OSX release."
            return -code error "Unsupported OSX version"
        }
    }

    # Note that we are forcing this choice.  This means that anything linking
    # against root6 needs to also be using libc++.  This is possibly
    # problematic, but luckily there is just a limited set of such dependents.
    # Another problem is that all dependencies might need to be built-in
    # to make sure that they all use libc++.
    if { ${configure.cxx_stdlib} ne "libc++" } {
        configure.cxx_stdlib libc++
        depends_lib-append port:libcxx
    }

    pre-configure {
        # replace
        #   -DCMAKE_OSX_SYSROOT="/Developer/SDKs/MacOSX10.6.sdk"
        #   -DCMAKE_OSX_DEPLOYMENT_TARGET="10.6"
        # with
        #   -DCMAKE_OSX_SYSROOT="/"
        #   -DCMAKE_OSX_DEPLOYMENT_TARGET=""
        configure.args-strsed "s|CMAKE_OSX_SYSROOT=\[^\[:blank:\]\]*|CMAKE_OSX_SYSROOT=\"/\"|"
        configure.args-strsed "s|CMAKE_OSX_DEPLOYMENT_TARGET=\[^\[:blank:\]\]*|CMAKE_OSX_DEPLOYMENT_TARGET=\"\"|"

        # Force use of system python in build scripts
        # Find command finds text files containing the string to be replaced.
        # shtest-encoding.py intentionally includes an unreadable character, so have to skip it ...
        set pystringtoreplace "/usr/bin/env python"
        foreach f [ exec find ${worksrcpath} -type f -and -not -name "shtest-encoding.py" -and -name "*.py" ] {
            reinplace "s|${pystringtoreplace}|/usr/bin/python|g" $f
        }
    }
}

post-destroot {
    # Temporary - Set execute flag on binaries (broken in 6.06.00)
    foreach f [glob -directory ${destroot}${install_prefix}/bin *] {
        system "chmod +x $f"
    }
    # create versioned symlinks for the content of libexec bin dir
    foreach f [glob -directory ${destroot}${install_prefix}/bin *] {
        set filename  [file tail $f]
        set extension [file extension $filename]
        set base      [file rootname $filename]
        set versioned_filename ${base}${version_major}${extension}
        ln -s ${install_prefix}/bin/${filename} ${destroot}${prefix}/bin/${versioned_filename}
    }
    # lib dir
    ln -s ${install_prefix}/lib/root ${destroot}${prefix}/lib/root${version_major}
    # include dir
    ln -s ${install_prefix}/include/root ${destroot}${prefix}/include/root${version_major}
    # etc dir
    ln -s ${install_prefix}/etc/root ${destroot}${prefix}/etc/root${version_major}
    # share dir
    ln -s ${install_prefix}/share ${destroot}${prefix}/share/root${version_major}
    # Compress manpages in custom location (borrowed from mariadb)
    set manpath ${install_prefix}/share/man
    set gzip [findBinary gzip ${portutil::autoconf::gzip_path}]
    foreach manpage [glob -type f ${destroot}${manpath}/man1/*] {
        # Zip the man file
        system "$gzip -9vf ${manpage}"
        # Create man pages for versioned files
        set filename  [file tail $manpage]
        set extension [file extension $filename]
        set base      [file rootname $filename]
        set versioned_filename ${base}${version_major}${extension}.gz
        set d [file tail $manpage]
        ln -s ${manpath}/man1/${d}.gz ${destroot}${prefix}/share/man/man1/${versioned_filename}
    }
}

set run_port_select "No"
pre-activate {
  if { ![file exists ${prefix}/bin/root]  &&
       ![file exists ${prefix}/bin/root5] &&
       ![file exists ${prefix}/bin/root6] } {
     set run_port_select "Yes"
  }
}

post-activate {
  ui_msg "======================================================================================"
  if { ${run_port_select} == "Yes" } {
      ui_msg "  Making root${version_major} your default root version. To change this run 'sudo port select root'"
      catch { system "port select root root${version_major}" }
  } else {
      ui_msg "  To make root${version_major} your default root version, run 'sudo port select root root${version_major}'"
  }
  ui_msg "======================================================================================"
}

universal_variant   no

default_variants    +cocoa +ssl +xml +gsl +minuit2 +tmva +roofit +graphviz +opengl +soversion +http

# Enable C++14 by default when Xcode allows (Xcode 6.3 onwards)
if { [vercmp $xcodeversion "6.3"] >= 0 } {
    default_variants-append +cxx14
}

variant qt4 description {Enable QT4 support} {
    configure.args-replace  -Dqt=OFF -Dqt=ON
    PortGroup qt4 1.0
}

variant cxx14 description {Enable c++14 compiler support} {
    configure.args-replace  -Dcxx14=OFF -Dcxx14=ON
    # Update compiler blacklist to force use of MP's Clang 3.7 when required
    compiler.blacklist-append {clang < 602} macports-clang-3.4
}

variant valgrind description {Build internal LLVM library with valgrind support} {
    depends_lib-append      port:valgrind
}

variant http description {Build with HTTP Server library support} {
    configure.args-replace  -Dhttp=OFF -Dhttp=ON
}

variant vc description {Build with Vc library support} {
    ui_msg "Vc support is currently disabled by upstream"
#   configure.args-replace  -Dvc=OFF -Dvc=ON
}

variant debug description {Enable a debug build} {
    configure.args-append   -DCMAKE_BUILD_TYPE=Debug
}

variant xrootd description {Build with XRootD support} {
    configure.args-replace  -Dxrootd=OFF -Dxrootd=ON
#   configure.args-append   -Dbuiltin_xrootd=ON
    configure.args-append   -DXROOTD_INCLUDE_DIR="${prefix}/include/xrootd"
    depends_lib-append      port:xrootd
}

variant soversion description {Build with soversion support} {
    configure.args-replace  -Dsoversion=OFF -Dsoversion=ON
}

variant graphviz description {Build with graphviz support} {
    configure.args-replace  -Dgviz=OFF -Dgviz=ON
    configure.args-append   -DGRAPHVIZ_INCLUDE_DIR="${prefix}/include"
#                           -DGRAPHVIZ_CDT_LIBRARY="${prefix}/lib/libcdt.dylib" \
#                           -DGRAPHVIZ_GRAPH_LIBRARY="${prefix}/lib/libcgraph.dylib" \
#                           -DGRAPHVIZ_GVC_LIBRARY="${prefix}/lib/libgvc.dylib" \
#                           -DGRAPHVIZ_PATHPLAN_LIBRARY="${prefix}/lib/libpathplan.dylib"
    depends_lib-append      path:bin/dot:graphviz
}

variant avahi description {Build with avahi support} {
    configure.args-replace  -Dbonjour=OFF -Dbonjour=ON
#   configure.args-append   -DAVAHI_INCLUDE_DIR="${prefix}/include" \
#                           -DAVAHI_client_LIBRARY="${prefix}/lib"
    depends_lib-append      port:avahi
}

variant fftw3 description {Build with fftw3 support} {
    configure.args-replace  -Dfftw3=OFF -Dfftw3=ON
    configure.args-append   -DFFTW_INCLUDE_DIR="${prefix}/include" \
                            -DFFTW_LIBRARY="${prefix}/lib/libfftw3.dylib"
    depends_lib-append      port:fftw-3
}

variant gsl description {Build with gsl support} {
    # Builtin GSL library
    #configure.args-replace -Dbuiltin_gsl=OFF -Dbuiltin_gsl=ON
    # External GSL library
    configure.args-replace  -Dgsl_shared=OFF -Dgsl_shared=ON
    configure.args-append   -DGSL_CONFIG_EXECUTABLE="${prefix}/bin/gsl-config"
    depends_lib-append      port:gsl
    # Enable the MathMore library
    configure.args-replace  -Dmathmore=OFF -Dmathmore=ON
}

variant fitsio description {Build with fitsio support} {
    configure.args-replace  -Dfitsio=OFF -Dfitsio=ON
    configure.args-append   -DCFITSIO_INCLUDE_DIR="${prefix}/include" \
                            -DCFITSIO_LIBRARIES="${prefix}/lib"
    depends_lib-append      port:cfitsio
}

variant odbc description {Build with odbc support} {
    configure.args-replace  -Dodbc=OFF -Dodbc=ON
    configure.args-append   -DODBC_INCLUDE_DIR="${prefix}/include" \
                            -DODBC_LIBRARY="${prefix}/lib/libiodbc.dylib"
    depends_lib-append      port:libiodbc
}

variant ldap description {Build with ldap support} {
    configure.args-replace  -Dldap=OFF -Dldap=ON
#   configure.args-append   -DLDAP_INCLUDE_DIR="${prefix}/include" \
#                           -DLDAP_LIBRARY="${prefix}/lib"
    depends_lib-append      port:openldap
}

variant roofit description {Build the RooFit advanced fitting package} {
    configure.args-replace  -Droofit=OFF -Droofit=ON
}

variant tmva description {Build the TMVA package} {
    configure.args-replace  -Dtmva=OFF -Dtmva=ON
}

variant minuit2 description {Build with minuit2 support} {
    configure.args-replace  -Dminuit2=OFF -Dminuit2=ON
}

variant opengl description {Build with opengl support} {
    configure.args-delete   -Dopengl=OFF
    configure.args-delete   -Dbuiltin_glew=OFF
    configure.args-append   -Dopengl=ON -Dbuiltin_glew=ON
}

# ========================================================================================
# Setup various python variants
# ========================================================================================

# List of possible python versions
set python_versions { 2.6 2.7 3.3 3.4 }
set default_python_variant +python27

# Define the available variants
foreach py_ver ${python_versions} {
    set py_ver_no_dot [join [split ${py_ver} "."] ""]
    set variant_line {variant python${py_ver_no_dot} description "Build with python ${py_ver} support"}
    foreach py_over ${python_versions} {
        if { ${py_ver} == ${py_over} } { continue }
        set py_over_no_dot [join [split ${py_over} "."] ""]
        append variant_line " conflicts python${py_over_no_dot}"
    }
    append variant_line { { } }
    eval $variant_line
    if {[variant_isset python${py_ver_no_dot}]} {
        if {${default_python_variant} != "+python${py_ver_no_dot}"} {
            set default_python_variant ""
        }
    }
}

if {${default_python_variant} != ""} {
    default_variants-append "${default_python_variant}"
}

# If a python variant is enabled, activate it
set active_python_version ""
foreach py_ver ${python_versions} {
    set py_ver_no_dot [join [split ${py_ver} "."] ""]
    if {[variant_isset python${py_ver_no_dot}]} {

        set active_python_version        ${py_ver}
        set active_python_version_no_dot ${py_ver_no_dot}

        # Check root5 variants
        pre-activate {
            set portname root5
            if {![catch {set result [active_variants ${portname} python${active_python_version_no_dot}]}]} {
                if {$result} {
                    ui_error "Cannot install ${name} with +python${active_python_version_no_dot} variant"
                    return -code error "${portname} port is already installed with +python${active_python_version_no_dot} and both cannot be active at once. Pick a different python variant."
                }
            }
        }

        # Setup python
        set mypydir ${frameworks_dir}/Python.framework/Versions/${py_ver}
        configure.args-replace  -Dpython=OFF -Dpython=ON
        configure.args-append   -DPYTHON_INCLUDE_DIR="${mypydir}/Headers" \
                                -DPYTHON_EXECUTABLE="${mypydir}/bin/python${py_ver}"
        # Explicitly set python library
        if       { [ file exists "${mypydir}/lib/libpython${py_ver}.dylib" ] } {
            configure.args-append -DPYTHON_LIBRARY="${mypydir}/lib/libpython${py_ver}.dylib"
        } elseif { [ file exists "${prefix}/lib/libpython${py_ver}.dylib" ] } {
            configure.args-append -DPYTHON_LIBRARY="${prefix}/lib/libpython${py_ver}.dylib"
        }
        depends_lib-append      port:python${py_ver_no_dot}
        
        post-destroot {
            # Install PyROOT lib in the correct place
            set mypylibdir  ${frameworks_dir}/Python.framework/Versions/${active_python_version}/lib/python${active_python_version}
            set mypysitedir ${mypylibdir}/site-packages/
            file mkdir ${destroot}${mypysitedir}
            foreach pyfile [glob ${destroot}${install_prefix}/lib/root/*.py*] { move $pyfile ${destroot}${mypysitedir}/ }
            ln -sf ${install_prefix}/lib/root/libPyROOT.so ${destroot}${mypylibdir}/
            # Fix python version in scripts
            set pystringtoreplace "/usr/bin/python"
            foreach f [ exec find ${destroot}${install_prefix} -type f -and -name "*.py" ] {
                reinplace "s|${pystringtoreplace}|${prefix}/bin/python${active_python_version}|g" $f
            }
            foreach f [ exec find ${destroot}${install_prefix}/bin -type f | xargs grep -Il ${pystringtoreplace} ] {
                reinplace "s|${pystringtoreplace}|${prefix}/bin/python${active_python_version}|g" $f
            }
        }

    }
}

# ========================================================================================

variant ssl description {Build with ssl support} {
    configure.args-replace  -Dssl=OFF -Dssl=ON
    depends_lib-append      path:lib/libssl.dylib:openssl
}

variant xml description {Build with xml support} {
    configure.args-replace  -Dxml=OFF -Dxml=ON
    configure.args-append   -DLIBXML2_INCLUDE_DIR="${prefix}/include/libxml2" \
                            -DLIBXML2_LIBRARIES="${prefix}/lib/libxml2.dylib" \
                            -DLIBXML2_XMLLINT_EXECUTABLE="${prefix}/bin/xmllint"
    depends_lib-append      port:libxml2
}

variant sqlite3 description {Build with sqlite3 support} {
    configure.args-replace  -Dsqlite=OFF -Dsqlite=ON
    depends_lib-append      port:sqlite3
}

variant mysql conflicts mysql51 mysql55 mysql56 mariadb percona description {Build with mysql5 support} {
    configure.args-replace  -Dmysql=OFF -Dmysql=ON
    configure.args-append   -DMYSQL_CONFIG_EXECUTABLE=${prefix}"/lib/mysql5/bin/mysql_config"
    depends_lib-append      port:mysql5
}

variant mysql51 conflicts mysql mysql55 mysql56 mariadb percona description {Build with mysql51 support} {
    configure.args-replace  -Dmysql=OFF -Dmysql=ON
    configure.args-append   -DMYSQL_CONFIG_EXECUTABLE=${prefix}"/lib/mysql51/bin/mysql_config"
    depends_lib-append      port:mysql51
}

variant mysql55 conflicts mysql mysql51 mysql56 mariadb percona description {Build with mysql55 support} {
    configure.args-replace  -Dmysql=OFF -Dmysql=ON
    configure.args-append   -DMYSQL_CONFIG_EXECUTABLE=${prefix}"/lib/mysql55/bin/mysql_config"
    depends_lib-append      port:mysql55
}

variant mysql56 conflicts mysql mysql51 mysql55 mariadb percona description {Build with mysql56 support} {
    configure.args-replace  -Dmysql=OFF -Dmysql=ON
    configure.args-append   -DMYSQL_CONFIG_EXECUTABLE=${prefix}"/lib/mysql56/bin/mysql_config"
    depends_lib-append      port:mysql56
}

variant mariadb conflicts mysql mysql51 mysql55 mysql56 percona description {Build with mariadb support} {
    configure.args-replace  -Dmysql=OFF -Dmysql=ON
    configure.args-append   -DMYSQL_CONFIG_EXECUTABLE=${prefix}"/lib/mariadb/bin/mysql_config"
    depends_lib-append      port:mariadb
}

variant percona conflicts mysql mysql51 mysql55 mysql56 mariadb description {Build with percona support} {
    configure.args-replace  -Dmysql=OFF -Dmysql=ON
    configure.args-append   -DMYSQL_CONFIG_EXECUTABLE=${prefix}"/lib/percona/bin/mysql_config"
    depends_lib-append      port:percona
}

variant postgresql90 conflicts postgresql92 description {Build with PostgreSQL 9.0 support} {
    configure.args-replace -Dpgsql=OFF -Dpgsql=ON
    configure.args-append  -DPOSTGRESQL_INCLUDE_DIR="${prefix}/include/postgresql90"\
                           -DPOSTGRESQL_LIBRARY="${prefix}/lib/postgresql90/libpq.dylib"
    depends_lib-append      port:libpqxx port:postgresql90
}

variant postgresql92 conflicts postgresql90 description {Build with PostgreSQL 9.2 support} {
    configure.args-replace -Dpgsql=OFF -Dpgsql=ON
    configure.args-append  -DPOSTGRESQL_INCLUDE_DIR="${prefix}/include/postgresql92" \
                           -DPOSTGRESQL_LIBRARY="${prefix}/lib/postgresql92/libpq.dylib"
    depends_lib-append      port:libpqxx port:postgresql92
}

# variant oracle description {Build with Oracle support} {
#     configure.args-replace --disable-oracle --enable-oracle
#     configure.args-append  -DORACLE_PATH_INCLUDES="${prefix}/lib/oracle/sdk/include" \
#                            -DORACLE_PATH_LIB="${prefix}/lib/oracle" \
#                            -DORACLE_OCI_VERSION=8
#     depends_lib-append     port:oracle-instantclient
# }

variant pythia description {Enables Pythia 8 support} {
    configure.args-replace  -Dpythia8=OFF -Dpythia8=ON
    configure.args-append   -DPYTHIA8_INCLUDE_DIR=${prefix}/include/pythia \
                            -DPYTHIA8_LIBRARY=${prefix}/lib/libpythia8.dylib
    depends_lib-append      port:pythia
}

variant cocoa conflicts x11 description {Enables native OSX graphical backend} {
    # Enable cocoa support in configure
    configure.args-append   -Dcocoa=ON -Dx11=OFF
}

variant x11 conflicts cocoa description {Enables X11 graphical backend} {
    # Dependencies on X11 ports
    depends_lib-append      port:xorg-libX11 port:mesa port:libGLU port:Xft2 port:xpm
    # Disable cocoa
    configure.args-append   -Dcocoa=OFF -Dx11=ON \
                            -DOPENGL_INCLUDE_DIR=${prefix}/include \
                            -DOPENGL_gl_LIBRARY=${prefix}/lib/libGL.dylib \
                            -DX11_ICE_INCLUDE_PATH=${prefix}/include \
                            -DX11_SM_INCLUDE_PATH=${prefix}/include \
                            -DX11_X11_INCLUDE_PATH=${prefix}/include \
                            -DX11_Xext_INCLUDE_PATH=${prefix}/include \
                            -DX11_Xft_INCLUDE_PATH=${prefix}/include \
                            -DX11_Xpm_INCLUDE_PATH=${prefix}/include \
                            -DX11_ICE_LIB=${prefix}/lib/libICE.dylib \
                            -DX11_SM_LIB=${prefix}/lib/libSM.dylib \
                            -DX11_X11_LIB=${prefix}/lib/libX11.dylib \
                            -DX11_Xext_LIB=${prefix}/lib/libXext.dylib \
                            -DX11_Xft_LIB=${prefix}/lib/libXft.dylib \
                            -DX11_Xpm_LIB=${prefix}/lib/libXpm.dylib \
                            -DOPENGL_glu_LIBRARY=${prefix}/lib/libGLU.dylib
}

# ========================================================================================
# Setup various clang variants, to provide alternative C++ compilers that support cocoa
# ========================================================================================

# List of possible clang versions that work
set clang_versions { 3.4 3.5 3.6 3.7 3.8 }

# Define the available variants
foreach clang_ver ${clang_versions} {
    set clang_ver_no_dot [join [split ${clang_ver} "."] ""]
    set variant_line {variant clang${clang_ver_no_dot} description "Compile using MacPorts clang ${clang_ver}"}
    foreach clang_over ${clang_versions} {
        if { ${clang_ver} == ${clang_over} } { continue }
        set clang_over_no_dot [join [split ${clang_over} "."] ""]
        append variant_line " conflicts clang${clang_over_no_dot}"
    }
    append variant_line { { } }
    eval $variant_line
}

# make sure that the proper variant is automatically selected
# (ROOT crashes if the compiler it was built with doesn't exist)
if { ![variant_isset clang34] &&
     ![variant_isset clang35] &&
     ![variant_isset clang36] &&
     ![variant_isset clang37] &&
     ![variant_isset clang38] } {
    if       { ${configure.compiler} eq "macports-clang-3.4" } {
        default_variants-append +clang34
    } elseif { ${configure.compiler} eq "macports-clang-3.5" } {
        default_variants-append +clang35
    } elseif { ${configure.compiler} eq "macports-clang-3.6" } {
        default_variants-append +clang36
    } elseif { ${configure.compiler} eq "macports-clang-3.7" } {
        default_variants-append +clang37
    } elseif { ${configure.compiler} eq "macports-clang-3.8" } {
        default_variants-append +clang38
    }
}

# Is a variant active ?
set active_clang_variant ""
foreach clang_ver ${clang_versions} {
    set clang_ver_no_dot [join [split ${clang_ver} "."] ""]
    if {[variant_isset clang${clang_ver_no_dot}]} {
        set active_clang_variant ${clang_ver}
    }
}

# If so, set it up.
if { ${active_clang_variant} != "" } {
    configure.compiler  macports-clang-${active_clang_variant}
    # TODO
    # configure.args-append   --with-llvm-config="${prefix}/bin/llvm-config-mp-"${active_clang_variant}
    depends_run-append  port:clang-${active_clang_variant}
}

# ========================================================================================
# Following is for fortran support
# Might eventually move to a portgroup, or similar, so could be simplified.
# Based on recipe from https://trac.macports.org/wiki/PortfileRecipes#fortran
# Note that g95 does not work here, so that variant is removed
# ========================================================================================

set gcc_versions { 4.7 4.8 4.9 5 6 }
set default_fortran_variant +gcc6

foreach gcc_ver ${gcc_versions} {
    set gcc_ver_no_dot [join [split ${gcc_ver} "."] ""]

    set variant_line {variant gcc${gcc_ver_no_dot} description "Build with gfortran from gcc${gcc_ver_no_dot}"}

    foreach gcc_over ${gcc_versions} {
        if {${gcc_ver} == ${gcc_over}} {
            continue
        }
        set gcc_over_no_dot [join [split ${gcc_over} "."] ""]
        append variant_line " conflicts gcc${gcc_over_no_dot}"
    }

    append variant_line { {} }

    eval $variant_line

    if {[variant_isset gcc${gcc_ver_no_dot}]} {
        if {${default_fortran_variant} != "+gcc${gcc_ver_no_dot}"} {
            set default_fortran_variant ""
        }
    }
}

if {${default_fortran_variant} != ""} {
    default_variants-append "${default_fortran_variant}"
}

foreach gcc_ver ${gcc_versions} {
    set gcc_ver_no_dot [join [split ${gcc_ver} "."] ""]

    if {[variant_isset gcc${gcc_ver_no_dot}]} {
        depends_lib-append path:lib/libgcc/libgcc_s.1.dylib:libgcc
        depends_build-append port:gcc${gcc_ver_no_dot}

        configure.fc  ${prefix}/bin/gfortran-mp-${gcc_ver}
        configure.f77 ${prefix}/bin/gfortran-mp-${gcc_ver}
        configure.f90 ${prefix}/bin/gfortran-mp-${gcc_ver}

        configure.args-replace -Dfortran=OFF -Dfortran=ON
    }
}

# ========================================================================================

# Various variants etc. with problems. Work in progress...

# variant ruby description {Build with ruby support} {
#     configure.args-replace  -Druby=OFF -Druby=ON
#     depends_lib-append      port:ruby
# }

# variant geocad description {Enable CAD Interface} {
#     configure.args-replace  -Dgeocad=OFF -Dgeocad=ON
#     depends_lib-append      port:oce
#     configure.args-append   -DOCC_INCLUDE_DIR="${prefix}/include/oce"
# }

# variant r description {Enable R support} {
#     configure.args-replace  -Dr=OFF -Dr=ON
#     depends_lib-append  port:R
# }

livecheck.type      regex
livecheck.url       ${github.homepage}/tags
livecheck.regex     {archive/v(6[-.]\d[02468][-.]\d{2}).tar.gz}