#ifndef _GLIBCPP_OS_DEFINES
# define _GLIBCPP_OS_DEFINES
-// By enabling this, all GNU extensions are enabled.
+// By defining this, all GNU extensions are enabled.
#define _GNU_SOURCE 1
-// By enabling this, all ISO C99 functionality is enabled.
+// By defining this, all ISO C99 functionality is enabled.
#define _ISOC99_SOURCE 1
// This keeps isanum, et al from being propagated as macros.