# Override R weird defaults:
# https://stackoverflow.com/questions/23414448/r-makevars-file-to-overwrite-r-cmds-default-g-options
-
%.o: %.c
- gcc -I/usr/include/R -I/usr/local/include/R -DNDEBUG -fpic -O2 -c $< -o $@
-
-# On u-psud cluster:
-#%.o: %.c
-# gcc -I"/usr/local/R/3.6.1/lib64/R/include" -I/usr/local/include -DNDEBUG -fpic -O2 -c $< -o $@
+ $(CC) -std=c11 -I"$(R_INCLUDE_DIR)" -DNDEBUG -fPIC -O2 -c $< -o $@