Apply a fix from Eric Blake that already went into autoconf.

[gnulib.git] / m4 / strerror_r.m4

diff --git a/m4/strerror_r.m4 b/m4/strerror_r.m4
index 28924b1..e3b5d0c 100644 (file)
--- a/m4/strerror_r.m4
+++ b/m4/strerror_r.m4
@@ -25,6 +25,7 @@ AC_CACHE_CHECK([whether strerror_r returns char *],
          char buf[100];
          char x = *strerror_r (0, buf, sizeof buf);
          char *p = strerror_r (0, buf, sizeof buf);
+         return !p || x;
        ]])],
                        ac_cv_func_strerror_r_char_p=yes)
     else