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-rw-r--r--conform/data/ctype.h-data2
1 files changed, 2 insertions, 0 deletions
diff --git a/conform/data/ctype.h-data b/conform/data/ctype.h-data
index 190c5678c2..f0aa947873 100644
--- a/conform/data/ctype.h-data
+++ b/conform/data/ctype.h-data
@@ -15,6 +15,8 @@ function int toupper (int)
 #ifndef ISO
 function int isascii (int)
 function int toascii (int)
+
+# XPG says the following two are macros.  But we test a bit more strictly.
 function int _toupper (int)
 function int _tolower (int)