configure

#!/bin/sh

# Use xml2-config or pkg-config to get the include directories for libxml-2.0
if xml2-config --version >/dev/null 2>&1; then
    libxml2_cflags=$(xml2-config --cflags)
    libxml2_libs=$(xml2-config --libs)
elif pkg-config --version >/dev/null 2>&1; then
    libxml2_cflags=$(pkg-config --cflags libxml-2.0)
    libxml2_libs=$(pkg-config --libs --static libxml-2.0)
else
    echo "Warning: libxml2 not found. Neither xml2-config nor pkg-config is available."
    libxml_unavilable=true
fi

if [ -n "$libxml2_cflags" ]; then
    PKG_CFLAGS="$PKG_CFLAGS $libxml2_cflags -DHAVE_LIBXML"
    echo "libxml2 include directories: $libxml2_cflags"
else
    echo "Warning: libxml2 include directory not found."
    libxml_unavilable=true
fi

if [ -n "$libxml2_libs" ]; then
    PKG_LIBS="$PKG_LIBS $libxml2_libs"
    echo "libxml2 library link flags: $libxml2_libs"
else
    echo "Warning: libxml2 library link flags not found."
    libxml_unavilable=true
fi

if [ "$libxml_unavilable" = true ]; then
    echo "GraphML import will not be available."
fi

OBJECTS='${SOURCES} ${MINIGMPSOURCES}'

if echo '#include <glpk.h>' | `"${R_HOME}/bin/R" CMD config CC` -E $CPPFLAGS - > /dev/null 2>&1; then
  echo "Using installed GLPK"
  PKG_LIBS="$PKG_LIBS -lglpk"
else
  echo "Using vendored GLPK"
  PKG_CFLAGS="$PKG_CFLAGS -Ivendor/cigraph/vendor/glpk -Ivendor/cigraph/vendor/glpk/env -Ivendor/cigraph/vendor/glpk/minisat -Ivendor/cigraph/vendor/glpk/misc -Ivendor/cigraph/vendor/glpk/draft -Ivendor/cigraph/vendor/glpk/npp -Ivendor/cigraph/vendor/glpk/api -Ivendor/cigraph/vendor/glpk/mpl -Ivendor/cigraph/vendor/glpk/bflib -Ivendor/cigraph/vendor/glpk/amd -Ivendor/cigraph/vendor/glpk/simplex -Ivendor/cigraph/vendor/glpk/colamd"
  OBJECTS=${OBJECTS}' ${GLPKSOURCES}'
fi

echo "# Generated from Makevars.in, do not edit by hand" > src/Makevars.new
sed -e "s|@cflags@|$PKG_CFLAGS|" -e "s|@libs@|$PKG_LIBS|" -e "s|@objects@|${OBJECTS}|" src/Makevars.in >> src/Makevars.new
if [ ! -f src/Makevars ] || (which diff > /dev/null && ! diff -q src/Makevars src/Makevars.new); then
    cp -f src/Makevars.new src/Makevars
fi
rm -f src/Makevars.new