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-rw-r--r--doc/posix-headers/stddef.texi7
1 files changed, 7 insertions, 0 deletions
diff --git a/doc/posix-headers/stddef.texi b/doc/posix-headers/stddef.texi
index 84db56c0cb..829447ca37 100644
--- a/doc/posix-headers/stddef.texi
+++ b/doc/posix-headers/stddef.texi
@@ -18,4 +18,11 @@ NetBSD 5.0
Portability problems not fixed by Gnulib:
@itemize
+@item
+Some platforms provide an @code{offsetof} macro that cannot be used in
+arbitrary expressions:
+Solaris 10
+This problem can be worked around by parenthesizing the
+@code{offsetof} expression in the unlikely case you use it with
+@code{sizeof} or @samp{[]}.
@end itemize