Update from Gnulib

This incorporates:
2019-06-24 unistd: stddef.h and sys/types.h namespace cleanup
* lib/gnulib.mk.in: Regenerate.
* lib/unistd.in.h: Copy from gnulib.

2 files changed, 9 insertions, 10 deletions

diff --git a/lib/gnulib.mk.in b/lib/gnulib.mk.in
index d0bef0bd5de..b9a32d9dbc1 100644
--- a/lib/gnulib.mk.in
+++ b/lib/gnulib.mk.in
@@ -1073,7 +1073,9 @@ gl_GNULIB_ENABLED_dirfd = @gl_GNULIB_ENABLED_dirfd@
 gl_GNULIB_ENABLED_euidaccess = @gl_GNULIB_ENABLED_euidaccess@
 gl_GNULIB_ENABLED_getdtablesize = @gl_GNULIB_ENABLED_getdtablesize@
 gl_GNULIB_ENABLED_getgroups = @gl_GNULIB_ENABLED_getgroups@
+gl_GNULIB_ENABLED_malloca = @gl_GNULIB_ENABLED_malloca@
 gl_GNULIB_ENABLED_open = @gl_GNULIB_ENABLED_open@
+gl_GNULIB_ENABLED_pathmax = @gl_GNULIB_ENABLED_pathmax@
 gl_GNULIB_ENABLED_strtoll = @gl_GNULIB_ENABLED_strtoll@
 gl_LIBOBJS = @gl_LIBOBJS@
 gl_LTLIBOBJS = @gl_LTLIBOBJS@
diff --git a/lib/unistd.in.h b/lib/unistd.in.h
index 94a8f383c99..59ee39ecea5 100644
--- a/lib/unistd.in.h
+++ b/lib/unistd.in.h
@@ -52,7 +52,10 @@
 #define _@GUARD_PREFIX@_UNISTD_H
 
 /* NetBSD 5.0 mis-defines NULL.  Also get size_t.  */
-#include <stddef.h>
+/* But avoid namespace pollution on glibc systems.  */
+#ifndef __GLIBC__
+# include <stddef.h>
+#endif
 
 /* mingw doesn't define the SEEK_* or *_FILENO macros in <unistd.h>.  */
 /* MSVC declares 'unlink' in <stdio.h>, not in <unistd.h>.  We must include
@@ -124,15 +127,9 @@
 
 /* MSVC defines off_t in <sys/types.h>.
    May also define off_t to a 64-bit type on native Windows.  */
-#if !@HAVE_UNISTD_H@ || @WINDOWS_64_BIT_OFF_T@
-/* Get off_t.  */
-# include <sys/types.h>
-#endif
-
-#if (@GNULIB_READ@ || @GNULIB_WRITE@ \
-     || @GNULIB_READLINK@ || @GNULIB_READLINKAT@ \
-     || @GNULIB_PREAD@ || @GNULIB_PWRITE@ || defined GNULIB_POSIXCHECK)
-/* Get ssize_t.  */
+/* But avoid namespace pollution on glibc systems.  */
+#ifndef __GLIBC__
+/* Get off_t, ssize_t.  */
 # include <sys/types.h>
 #endif