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-rw-r--r--stdlib/stdlib.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/stdlib/stdlib.h b/stdlib/stdlib.h
index d11b8bf73b..b43c170951 100644
--- a/stdlib/stdlib.h
+++ b/stdlib/stdlib.h
@@ -382,6 +382,13 @@ extern int setenv __P ((__const char *__name, __const char *__value,
 extern void unsetenv __P ((__const char *__name));
 #endif
 
+#ifdef	__USE_MISC
+/* The `clearenv' was planned to be added to POSIX.1 but probably
+   never made it.  Nevertheless the POSIX.9 standard (POSIX bindings
+   for Fortran 77) requires this function.  */
+extern int clearenv __P ((void));
+#endif
+
 /* Execute the given line as a shell command.  */
 extern int system __P ((__const char *__command));