Make it possible to turn off the mkdir override on Windows.

* lib/sys_stat.in.h (mkdir): Conditionalize through GNULIB_MKDIR and
GNULIB_MDA_MKDIR. Also support GNULIB_POSIXCHECK.
* m4/sys_stat_h.m4 (gl_SYS_STAT_H_DEFAULTS): Initialize GNULIB_MKDIR,
GNULIB_MDA_MKDIR.
* modules/sys_stat (Makefile.am): Substitute GNULIB_MKDIR,
GNULIB_MDA_MKDIR.
* modules/mkdir (configure.ac): Invoke gl_SYS_STAT_MODULE_INDICATOR.
* doc/posix-functions/mkdir.texi: Mention also the 'sys_stat' module.

1 files changed, 12 insertions, 8 deletions

diff --git a/doc/posix-functions/mkdir.texi b/doc/posix-functions/mkdir.texi
index 141d35d289..1162947fac 100644
--- a/doc/posix-functions/mkdir.texi
+++ b/doc/posix-functions/mkdir.texi
@@ -4,21 +4,15 @@
 
 POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/mkdir.html}
 
-Gnulib module: mkdir
+Gnulib module: sys_stat or mkdir
 
-Portability problems fixed by Gnulib:
+Portability problems fixed by either Gnulib module @code{sys_stat} or @code{mkdir}:
 @itemize
 @item
 This function is declared in different header files (namely, @code{<io.h>} or
 @code{<direct.h>}) on some platforms:
 mingw, MSVC 14.
 @item
-When the argument ends in a slash, the function call fails on some platforms.
-@item
-This function mistakenly succeeds on @samp{mkdir("d/./",mode)} on
-some platforms:
-Cygwin 1.5.x, mingw, MSVC 14.
-@item
 On Windows platforms (excluding Cygwin), this function is called @code{_mkdir}
 and takes only one argument.  The fix (without Gnulib) is to define a macro
 like this:
@@ -31,6 +25,16 @@ or
 @end smallexample
 @end itemize
 
+Portability problems fixed by Gnulib module @code{mkdir}:
+@itemize
+@item
+When the argument ends in a slash, the function call fails on some platforms.
+@item
+This function mistakenly succeeds on @samp{mkdir("d/./",mode)} on
+some platforms:
+Cygwin 1.5.x, mingw, MSVC 14.
+@end itemize
+
 Portability problems not fixed by Gnulib:
 @itemize
 @end itemize