[*] cc -std=gnu2x --version
<.> /tmp/work/devel/R-renv/work/.compiler/bin/c-fail-wrapper -fcommon -m64 -fstack-protector-strong -D_FORTIFY_SOURCE=2 -std=gnu2x --version -gdwarf-4 -gstrict-dwarf -I/tmp/work/devel/R-renv/work/.buildlink/include
*** Please consider adding c to USE_LANGUAGES in the package Makefile.
[*] cc -std=gnu2x -I/opt/local/lib/R/include -DNDEBUG -I/opt/local/include -I/opt/local/include/glib-2.0 -I/opt/local/include/gio-unix-2.0 -I/opt/local/lib/glib-2.0/include -I/usr/include -I/opt/local/include/freetype2 -I/opt/local/include/harfbuzz -I/opt/local/include/ncurses -DLDAP_DEPRECATED -I/opt/local/include/libxml2 -fPIC -pipe -O2 -msave-args -fno-aggressive-loop-optimizations -pthread -I/opt/local/include -I/opt/local/include/glib-2.0 -I/opt/local/include/gio-unix-2.0 -I/opt/local/lib/glib-2.0/include -I/usr/include -I/opt/local/include/freetype2 -I/opt/local/include/harfbuzz -I/opt/local/include/ncurses -DLDAP_DEPRECATED -I/opt/local/include/libxml2 -c renv.c -o renv.o
<.> /tmp/work/devel/R-renv/work/.compiler/bin/c-fail-wrapper -fcommon -m64 -fstack-protector-strong -D_FORTIFY_SOURCE=2 -std=gnu2x -I/tmp/work/devel/R-renv/work/.buildlink/lib/R/include -DNDEBUG -I/tmp/work/devel/R-renv/work/.buildlink/include -I/tmp/work/devel/R-renv/work/.buildlink/include/glib-2.0 -I/tmp/work/devel/R-renv/work/.buildlink/include/gio-unix-2.0 -I/tmp/work/devel/R-renv/work/.buildlink/lib/glib-2.0/include -I/tmp/work/devel/R-renv/work/.buildlink/include/freetype2 -I/tmp/work/devel/R-renv/work/.buildlink/include/harfbuzz -I/tmp/work/devel/R-renv/work/.buildlink/include/ncurses -DLDAP_DEPRECATED -I/tmp/work/devel/R-renv/work/.buildlink/include/libxml2 -fPIC -pipe -O2 -msave-args -fno-aggressive-loop-optimizations -pthread -DLDAP_DEPRECATED -c renv.c -o renv.o -gdwarf-4 -gstrict-dwarf
*** Please consider adding c to USE_LANGUAGES in the package Makefile.