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-rw-r--r--doc/posix-headers/stdbool.texi7
1 files changed, 6 insertions, 1 deletions
diff --git a/doc/posix-headers/stdbool.texi b/doc/posix-headers/stdbool.texi
index 5b7ed0753f..d7ba4068fc 100644
--- a/doc/posix-headers/stdbool.texi
+++ b/doc/posix-headers/stdbool.texi
@@ -3,7 +3,12 @@
POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/stdbool.h.html}
-Gnulib module: stdbool
+Gnulib module: stdbool-c99
+
+The @code{stdbool-c99} module is present only for programs that
+formerly used the old @code{stdbool} module for C99 compatibility,
+and that for some reason cannot use the current @code{stdbool} module
+for C23 compatibility.
Portability problems fixed by Gnulib:
@itemize