--- a/doc/gnulib.texi
+++ b/doc/gnulib.texi
@@ -2895,6 +2895,7 @@
 @menu
 * alloca::
 * alloca-opt::
+* String Functions in C Locale::
 * Quoting::
 * error and progname::
 * gcd::
@@ -2912,6 +2913,58 @@
 @findex alloca
 @include alloca-opt.texi
 
+@node String Functions in C Locale
+@section Character and String Functions in C Locale
+
+The functions in this section are similar to the generic string functions
+from the standard C library, except that
+@itemize
+@item
+They behave as if the locale was set to the "C" locale, even when the
+locale is different, and/or
+@item
+They are specially optimized for the case where all characters are plain
+ASCII characters.
+@end itemize
+
+@menu
+* c-ctype::
+* c-strcase::
+* c-strcaseeq::
+* c-strcasestr::
+* c-strstr::
+* c-strtod::
+* c-strtold::
+@end menu
+
+@node c-ctype
+@subsection c-ctype
+@include c-ctype.texi
+
+@node c-strcase
+@subsection c-strcase
+@include c-strcase.texi
+
+@node c-strcaseeq
+@subsection c-strcaseeq
+@include c-strcaseeq.texi
+
+@node c-strcasestr
+@subsection c-strcasestr
+@include c-strcasestr.texi
+
+@node c-strstr
+@subsection c-strstr
+@include c-strstr.texi
+
+@node c-strtod
+@subsection c-strtod
+@include c-strtod.texi
+
+@node c-strtold
+@subsection c-strtold
+@include c-strtold.texi
+
 @include quote.texi
 @include error.texi
 @include gcd.texi