autoupdate: add square brackets around argument of AC_PREREQ

https://www.gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.72/autoconf.html#index-AC_005fPREREQ-1

diff --git a/libctf/configure.ac b/libctf/configure.ac
index ced1aeb7ccfddaa9d43e652f0a21cf2df44d940e..51ad76e97550e8ba70956e15c89c3bdf4f168fe6 100644 (file)
--- a/libctf/configure.ac
+++ b/libctf/configure.ac
@@ -18,7 +18,7 @@ dnl along with this program; see the file COPYING.  If not see
 dnl <http://www.gnu.org/licenses/>.
 dnl
 
-AC_PREREQ(2.64)
+AC_PREREQ([2.64])
 AC_INIT([libctf], 1.2.0)
 AC_CONFIG_SRCDIR(ctf-impl.h)
 AC_CANONICAL_BUILD

diff --git a/readline/readline/configure.ac b/readline/readline/configure.ac
index 9ea2a6b4b5eeeefe7d6b25f9fb30cc29749934b4..6a9d77f0c51f75db662c4d972b85eade977a6553 100644 (file)
--- a/readline/readline/configure.ac
+++ b/readline/readline/configure.ac
@@ -27,7 +27,7 @@ m4_include([../../config/override.m4])
 AC_INIT(readline, 8.1, bug-readline@gnu.org)
 
 dnl make sure we are using a recent autoconf version
-AC_PREREQ(2.50)
+AC_PREREQ([2.50])
 
 AC_CONFIG_SRCDIR(readline.h)
 dnl GDB LOCAL