#!/bin/sh
echo "Checking to see if libmagic is available..."

: ${R_HOME=`R RHOME`}
if test -z "${R_HOME}"; then
  echo "could not determine R_HOME"
  exit 1
fi

CC=`"${R_HOME}/bin/R" CMD config CC`
CFLAGS=`"${R_HOME}/bin/R" CMD config CFLAGS`
CPPFLAGS=`"${R_HOME}/bin/R" CMD config CPPFLAGS`
CXXFLAGS=`"${R_HOME}/bin/R" CMD config CXXFLAGS`
LDFLAGS=`"${R_HOME}/bin/R" CMD config LDFLAGS`
DYLIB_LDFLAGS=`"${R_HOME}/bin/R" CMD config DYLIB_LDFLAGS`
SHLIB_LDFLAGS=`"${R_HOME}/bin/R" CMD config SHLIB_LDFLAGS`

temp_src=$(mktemp)
cat > ${temp_src} <<EOF
#include "src/magic.h"
int main() {
  magic_t t = magic_open(MAGIC_NONE);
  return(0)
}
EOF

temp_exe=$(mktemp)

${CC} ${CFLAGS} ${CPPFLAGS} ${LD_FLAGS} ${CXXFLAGS} ${DYLIB_LDFLAGS} ${SHLIB_LDFLAGS} -L/usr/local/lib -L/opt/local/lib -L/usr/lib -lmagic -o ${temp_exe} ${temp_src} > /dev/null 2>&1

ccerr=$?

rm ${temp_src} ${temp_exe}

if [ "$ccerr" = 1 ] ; then
  echo
  echo
  echo "The libmagic library was not found."
  echo
  echo "Please install it before installing this package."
  echo
  echo
  exit 1
fi

exit 0