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-rw-r--r--include/stdlib.h14
1 files changed, 8 insertions, 6 deletions
diff --git a/include/stdlib.h b/include/stdlib.h
index cc92273..1902950 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -161,14 +161,16 @@ _Noreturn void
quick_exit(int);
#endif /* __ISO_C_VISIBLE >= 2011 */
/*
- * Extensions made by POSIX relative to C. We don't know yet which edition
- * of POSIX made these extensions, so assume they've always been there until
- * research can be done.
+ * Extensions made by POSIX relative to C.
*/
-#if __POSIX_VISIBLE /* >= ??? */
-int posix_memalign(void **, size_t, size_t); /* (ADV) */
-int rand_r(unsigned *); /* (TSF) */
+#if __POSIX_VISIBLE >= 199506 || __XSI_VISIBLE
char *realpath(const char * __restrict, char * __restrict);
+#endif
+#if __POSIX_VISIBLE >= 199506
+int rand_r(unsigned *); /* (TSF) */
+#endif
+#if __POSIX_VISIBLE >= 200112
+int posix_memalign(void **, size_t, size_t); /* (ADV) */
int setenv(const char *, const char *, int);
int unsetenv(const char *);
#endif
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