configure

#! /usr/bin/env sh

if [ -z "$R_HOME" ]; then
    echo >&2 R_HOME is not set, are you running R CMD INSTALL?
    exit 1
fi

if [ "$R_OSTYPE" = "unix" ]; then
    UNAME=`uname`
else
    UNAME=Windows
fi

# CentOS 7 seems to work with C++-14
if [ "$UNAME" = "Linux" ]; then
    CXX_STANDARD=14
else
    CXX_STANDARD=14
fi

if [ "$UNAME" = "Windows" ]; then
    CMAKE_PREFIX_PATH="../extra/cmake"
    PROTOBUF_LIBS="`pkg-config --libs protobuf`"
    LIBCURL_LIBS="`pkg-config --libs libcurl`"
    XCFLAGS="-DCURL_STATICLIB"
    XCXXFLAGS="-DCURL_STATICLIB"
elif [ "$UNAME" = "Darwin" ]; then
    CMAKE_PREFIX_PATH="/opt/R/`arch`"
    PROTOBUF_LIBS="-lprotobuf"
    LIBCURL_LIBS="-lcurl"
else
    CMAKE_PREFIX_PATH=""
    PROTOBUF_LIBS="-lprotobuf"
    LIBCURL_LIBS="-lcurl"
fi

CMAKE_BUILD_PARALLEL_LEVEL=""
if ! echo ${R_LIBRARY_DIR} | grep -q otelsdk.Rcheck &&
   ! echo ${R_LIBS} | grep -q otelsdk.Rcheck; then
  if [ -n "$NCPU" ]; then
    # already set
    true
  elif [ "$R_OSTYPE" = "windows" ]; then
    NCPU=$NUMBER_OF_PROCESSORS
  elif [ "$UNAME" = "Linux" ]; then
    NCPU=`cat /proc/cpuinfo  | grep '^processor\s*:' | wc -l || true`
  elif [ "$UNAME" = "Darwin" ]; then
    NCPU=`sysctl -n hw.ncpu || true`
  else
    NCPU=""
  fi
  if expr "$NCPU" : '[1-9][0-9]*$' >/dev/null; then
    echo '**'" using $NCPU processors (unless configured differently in Makeconf)."
    CMAKE_BUILD_PARALLEL_LEVEL="CMAKE_BUILD_PARALLEL_LEVEL=$NCPU"
  else
    echo '**'" parallel compilation is disabled."
    NCPU=""
  fi
fi

cat src/Makevars.in |
  sed "s|@UNAME@|${UNAME}|" |
  sed "s|@CXX_STANDARD@|${CXX_STANDARD}|" |
  sed "s|@XCFLAGS@|${XCFLAGS}|" |
  sed "s|@XCXXFLAGS@|${XCXXFLAGS}|" |
  sed "s|@PROTOBUF_LIBS@|${PROTOBUF_LIBS}|" |
  sed "s|@LIBCURL_LIBS@|${LIBCURL_LIBS}|" |
  sed "s|@OTEL_CLEANUP@|${OTEL_CLEANUP}|" |
  sed "s|@CMAKE_PREFIX_PATH@|${CMAKE_PREFIX_PATH}|" |
  sed "s|@CMAKE_BUILD_PARALLEL_LEVEL@|${CMAKE_BUILD_PARALLEL_LEVEL}|" |
  cat > src/Makevars