configure

#!/bin/sh

# RcppParallel flags: prefer R_HOME but fall back to Rscript on PATH
RSCRIPT=""
if [ -n "${R_HOME}" ]; then
    RSCRIPT="${R_HOME}/bin/Rscript"
else
    RSCRIPT="$(command -v Rscript || true)"
fi
if [ -n "${RSCRIPT}" ]; then
    RCPP_PARALLEL_CPPFLAGS=`"${RSCRIPT}" -e "cat(RcppParallel::CxxFlags())" 2>/dev/null || true`
    RCPP_PARALLEL_LIBS=`"${RSCRIPT}" -e "cat(RcppParallel::LdFlags())" 2>/dev/null || true`
else
    RCPP_PARALLEL_CPPFLAGS=""
    RCPP_PARALLEL_LIBS=""
fi

# # Generate src/sources.mk with the list of .cpp files under src/ (recursively)
# # and write a Makefile fragment src/Makevars.in.
# # Output file sources.mk
# OUT="src/sources.mk"

# # Find all .cpp files recursively under src/
# CPP_FILES=$(find src -type f -name "*.cpp" | sed -E 's|^src/||')

# # Start writing the file
# {
#     echo "# ------------------------------------------------------------------"
#     echo "# AUTO-GENERATED — DO NOT EDIT"
#     echo "# This file lists C++ sources compiled into the package."
#     echo "# Regenerate by running './configure' (or the project's build step)."
#     echo "# ------------------------------------------------------------------"
#     echo "SOURCES = \\" 
  
#     # List each cpp file with a backslash
#     for f in $CPP_FILES; do
#     echo "  $f \\"
#     done

#     # Empty line at the end
#     echo ""
# } > "$OUT"

# Substitute into Makevars
sed -e "s|@RCPP_PARALLEL_CPPFLAGS@|${RCPP_PARALLEL_CPPFLAGS}|" \
    -e "s|@RCPP_PARALLEL_LIBS@|${RCPP_PARALLEL_LIBS}|" \
src/Makevars.in > src/Makevars