~/R/svn/R-devel/configure -C \
--enable-R-shlib --enable-memory-profiling \
--build=x86_64-apple-darwin20 \
--with-tcl-config=/usr/local/lib/tclConfig.sh \
--with-tk-config=/usr/local/lib/tkConfig.sh \
--x-includes=/opt/X11/include --x-libraries=/opt/X11/lib \
PKG_CONFIG_PATH=/opt/X11/lib/pkgconfig:/opt/R/x86_64//lib/pkgconfig:/usr/lib/pkgconfig