+2025-05-01 G. Branden Robinson <g.branden.robinson@gmail.com> (tiny change)
+
+ doc: Clarify age of <sys/types.h>.
+ * doc/gnulib-readme.texi (C language versions): Mention when
+ <sys/types.h> first appeared.
+
2025-05-01 Bruno Haible <bruno@clisp.org>
vc-mtime: Add API for more efficient use of git.
@code{<locale.h>}, @code{<signal.h>}, @code{<stdio.h>},
@code{<stdlib.h>}, @code{<string.h>}, and @code{<time.h>}. Similarly,
many modules include @code{<sys/types.h>} even though it's not
-in the C standard; that's OK since @code{<sys/types.h>} has been around nearly
-forever.
+in the C standard; that's OK since @code{<sys/types.h>} has been around
+@c https://minnie.tuhs.org/cgi-bin/utree.pl?file=V7/usr/include/sys/types.h
+since Seventh Edition Unix (1979).
Even if the include files exist, they may not conform to the C standard.
However, GCC has a @command{fixincludes} script that attempts to fix most