New module 'fstat'. * lib/sys_stat.in.h (fstat): Declare only if GNULIB_FSTAT is set. * lib/fstat.c: New file, based on a piece of lib/fchdir.c. * lib/fchdir.c (rpl_fstat): Remove function. * m4/fstat.m4: New file. * m4/fchdir.m4 (gl_FUNC_FCHDIR): Don't set REPLACE_FSTAT. * m4/sys_stat_h.m4 (gl_HEADER_SYS_STAT_H): Test whether fstat is declared. (gl_SYS_STAT_H_DEFAULTS): Initialize GNULIB_FSTAT. * modules/sys_stat (Makefile.am): Substitute GNULIB_FSTAT. * modules/fstat: New file. * modules/sys_stat-tests (Depends-on): Remove fstat-tests. * tests/test-sys_stat-c++.cc (fstat): Check only if GNULIB_TEST_FSTAT is set. * doc/posix-functions/fstat.texi: Mention the new module and the problem on MSVC. * NEWS: Mention the change. * modules/acl (Depends-on): Add fstat. * modules/chdir-safer (Depends-on): Likewise. * modules/chown (Depends-on): Likewise. * modules/copy-file (Depends-on): Likewise. * modules/fchdir (Depends-on): Likewise. * modules/fdopendir (Depends-on): Likewise. * modules/fopen (Depends-on): Likewise. * modules/fts (Depends-on): Likewise. * modules/getcwd (Depends-on): Likewise. * modules/isapipe (Depends-on): Likewise. * modules/linkat (Depends-on): Likewise. * modules/lseek (Depends-on): Likewise. * modules/mkdir-p (Depends-on): Likewise. * modules/open (Depends-on): Likewise. * modules/openat (Depends-on): Likewise. * modules/read-file (Depends-on): Likewise. * modules/renameat (Depends-on): Likewise. * modules/utimens (Depends-on): Likewise.

--- a/modules/getcwd
+++ b/modules/getcwd
@@ -16,6 +16,7 @@
 d-ino           [test $REPLACE_GETCWD = 1]
 memmove         [test $REPLACE_GETCWD = 1]
 openat          [test $REPLACE_GETCWD = 1]
+fstat           [test $REPLACE_GETCWD = 1]
 opendir         [test $REPLACE_GETCWD = 1]
 closedir        [test $REPLACE_GETCWD = 1]
 stdbool         [test $REPLACE_GETCWD = 1]