diff --git a/gl/stdbool.in.h b/gl/stdbool.in.h
index e2312ecb80af9e7c78f3b094aec9612c5f5a4753..574c281a8f2912987ef2f02835f20c2c5196a4aa 100644 (file)
--- a/gl/stdbool.in.h
+++ b/gl/stdbool.in.h
with this substitute. With this substitute, only the values 0 and 1
give the expected result when converted to _Bool' or 'bool'.
+ - C99 allows the use of (_Bool)0.0 in constant expressions, but
+ this substitute cannot always provide this property.
+
Also, it is suggested that programs use 'bool' rather than '_Bool';
this isn't required, but 'bool' is more common. */