-# $2 is the name of the C flags variable
-# $3 is the name of the LD flags variable
-# $4 is the name of the CPP flags variable
+# $2 is the name of the CC flags variable
+# $3 is the name of the linker flags variable when linking with gcc
+# $4 is the name of the linker flags variable when linking with ld
+# $5 is the name of the CPP flags variable