-dnl @ ../doc/m4.texinfo:969: Origin of test
+dnl @ ../doc/m4.texi:992: Origin of test
dnl @ expected status: 0
dnl @ extra options:
dnl @ Copyright (C) 2006, 2007, 2008, 2009 Free Software
ifdef(`__unix__', ,
`errprint(` skipping: syscmd does not have unix semantics
')m4exit(`77')')dnl
+syscmd(`echo | cat >&- 2>/dev/null')ifelse(sysval, `0',
+ `errprint(` skipping: system does not allow closing stdout
+')m4exit(`77')')dnl
changequote(`[', `]')dnl
syscmd([echo | ']__program__[' >&-])dnl
dnl @error{}m4: write error: Bad file descriptor