# std::optional/<regex> in the vendored SIU core need C++17.
CXX_STD = CXX17
# Portable Makevars: no GNU-make extensions (CRAN policy). -lcurl resolves
# once the SystemRequirement libcurl (deb: libcurl4-openssl-dev, rpm:
# libcurl-devel) is installed; its headers/lib are on the default path.
PKG_LIBS = -lcurl
