Avoid test failure on AIX.

[gnulib.git] / m4 / posix-shell.m4

diff --git a/m4/posix-shell.m4 b/m4/posix-shell.m4
index 7f3b1e9..4c56193 100644 (file)
--- a/m4/posix-shell.m4
+++ b/m4/posix-shell.m4
@@ -31,12 +31,16 @@ AC_DEFUN([gl_POSIX_SHELL],
        func_ret_failure () {
         return 1
        }
+       subshell_umask_sanity () {
+        (umask 22; (umask 0); test $(umask) -eq 22)
+       }
        test "[$](echo foo)" = foo &&
        func_success &&
        ! func_failure &&
        func_ret_success &&
        ! func_ret_failure &&
-       (set x && func_ret_success y && test x = "[$]1")
+       (set x && func_ret_success y && test x = "[$]1") &&
+       subshell_umask_sanity
      '
      for gl_cv_posix_shell in \
         "$CONFIG_SHELL" "$SHELL" /bin/sh /bin/bash /bin/ksh /bin/sh5 no; do